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diff --git a/contrib/ChangeLog b/contrib/ChangeLog
index 2cd87e7..a6b3286 100644
--- a/contrib/ChangeLog
+++ b/contrib/ChangeLog
@@ -1,3 +1,7 @@
+2017-01-31 Bernhard Reutner-Fischer <aldot@gcc.gnu.org>
+
+ * update-copyright.py (Copyright.process_file): Retain original
+
2016-12-21 Release Manager
* GCC 6.3.0 released.
diff --git a/contrib/config-list.mk b/contrib/config-list.mk
index 6a83a84..9b42530 100644
--- a/contrib/config-list.mk
+++ b/contrib/config-list.mk
@@ -61,6 +61,7 @@ LIST = aarch64-elf aarch64-linux-gnu aarch64-rtems \
powerpc-wrs-vxworks powerpc-wrs-vxworksae powerpc-wrs-vxworksmils \
powerpc-lynxos powerpcle-elf \
powerpcle-eabisim powerpcle-eabi rs6000-ibm-aix4.3 rs6000-ibm-aix5.1.0 \
+ riscv32-unknown-linux-gnu riscv64-unknown-linux-gnu \
rs6000-ibm-aix5.2.0 rs6000-ibm-aix5.3.0 rs6000-ibm-aix6.0 \
rl78-elf rx-elf s390-linux-gnu s390x-linux-gnu s390x-ibm-tpf sh-elf \
shle-linux sh-netbsdelf sh-superh-elf sh5el-netbsd sh64-netbsd sh64-linux \
diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 06ebfb1..a4f3d32 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,60 @@
+2017-03-17 Palmer Dabbelt <palmer@dabbelt.com>
+
+ PR target/79912
+ * config/riscv/riscv.c (riscv_preferred_reload_class): Remove.
+ (TARGET_PREFERRED_RELOAD_CLASS): Likewise.
+
+2017-03-17 Palmer Dabbelt <palmer@dabbelt.com>
+
+ * config/riscv/riscv.c (riscv_print_operand): Use "fence
+ iorw,ow".
+ * config/riscv/sync.mc (mem_thread_fence_1): Use "fence
+ iorw,iorw".
+
+
+2017-02-06 Palmer Dabbelt <palmer@dabbelt.com>
+
+ * config/riscv/riscv.c: New file.
+ * gcc/common/config/riscv/riscv-common.c: Likewise.
+ * config.gcc: Likewise.
+ * config/riscv/constraints.md: Likewise.
+ * config/riscv/elf.h: Likewise.
+ * config/riscv/generic.md: Likewise.
+ * config/riscv/linux.h: Likewise.
+ * config/riscv/multilib-generator: Likewise.
+ * config/riscv/peephole.md: Likewise.
+ * config/riscv/pic.md: Likewise.
+ * config/riscv/predicates.md: Likewise.
+ * config/riscv/riscv-builtins.c: Likewise.
+ * config/riscv/riscv-c.c: Likewise.
+ * config/riscv/riscv-ftypes.def: Likewise.
+ * config/riscv/riscv-modes.def: Likewise.
+ * config/riscv/riscv-opts.h: Likewise.
+ * config/riscv/riscv-protos.h: Likewise.
+ * config/riscv/riscv.h: Likewise.
+ * config/riscv/riscv.md: Likewise.
+ * config/riscv/riscv.opt: Likewise.
+ * config/riscv/sync.md: Likewise.
+ * config/riscv/t-elf-multilib: Likewise.
+ * config/riscv/t-linux: Likewise.
+ * config/riscv/t-linux-multilib: Likewise.
+ * config/riscv/t-riscv: Likewise.
+ * configure.ac: Likewise.
+ * doc/contrib.texi: Add Kito Cheng, Palmer Dabbelt, and Andrew
+ Waterman as RISC-V maintainers.
+ * doc/install.texi: Add RISC-V entries.
+ * doc/invoke.texi: Add RISC-V options section.
+ * doc/md.texi: Add RISC-V constraints section.
+ * configure: Regenerated.
+ * config/riscv/riscv.c (riscv_emit_float_compare): Use fallthru
+ attribute rather than comments.
+
+
+2016-02-08 Kyrylo Tkachov <kyrylo.tkachov@arm.com>
+
+ * config/riscv/riscv.c (riscv_build_integer_1): Avoid use of INT16_MAX.
+
+
2016-12-21 Release Manager
* GCC 6.3.0 released.
diff --git a/gcc/common/config/riscv/riscv-common.c b/gcc/common/config/riscv/riscv-common.c
new file mode 100644
index 0000000..50f1485
--- /dev/null
+++ b/gcc/common/config/riscv/riscv-common.c
@@ -0,0 +1,131 @@
+/* Common hooks for RISC-V.
+ Copyright (C) 2016 Free Software Foundation, Inc.
+
+This file is part of GCC.
+
+GCC is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 3, or (at your option)
+any later version.
+
+GCC is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GCC; see the file COPYING3. If not see
+<http://www.gnu.org/licenses/>. */
+
+#include "config.h"
+#include "system.h"
+#include "coretypes.h"
+#include "tm.h"
+#include "common/common-target.h"
+#include "common/common-target-def.h"
+#include "opts.h"
+#include "flags.h"
+#include "diagnostic-core.h"
+
+/* Parse a RISC-V ISA string into an option mask. */
+
+static void
+riscv_parse_arch_string (const char *isa, int *flags, location_t loc)
+{
+ const char *p = isa;
+
+ if (strncmp (p, "rv32", 4) == 0)
+ *flags &= ~MASK_64BIT, p += 4;
+ else if (strncmp (p, "rv64", 4) == 0)
+ *flags |= MASK_64BIT, p += 4;
+ else
+ {
+ error_at (loc, "-march=%s: ISA string must begin with rv32 or rv64", isa);
+ return;
+ }
+
+ if (*p == 'g')
+ {
+ p++;
+
+ *flags |= MASK_MUL;
+ *flags |= MASK_ATOMIC;
+ *flags |= MASK_HARD_FLOAT;
+ *flags |= MASK_DOUBLE_FLOAT;
+ }
+ else if (*p == 'i')
+ {
+ p++;
+
+ *flags &= ~MASK_MUL;
+ if (*p == 'm')
+ *flags |= MASK_MUL, p++;
+
+ *flags &= ~MASK_ATOMIC;
+ if (*p == 'a')
+ *flags |= MASK_ATOMIC, p++;
+
+ *flags &= ~(MASK_HARD_FLOAT | MASK_DOUBLE_FLOAT);
+ if (*p == 'f')
+ {
+ *flags |= MASK_HARD_FLOAT, p++;
+
+ if (*p == 'd')
+ {
+ *flags |= MASK_DOUBLE_FLOAT;
+ p++;
+ }
+ }
+ }
+ else
+ {
+ error_at (loc, "-march=%s: invalid ISA string", isa);
+ return;
+ }
+
+ *flags &= ~MASK_RVC;
+ if (*p == 'c')
+ *flags |= MASK_RVC, p++;
+
+ if (*p)
+ {
+ error_at (loc, "-march=%s: unsupported ISA substring %qs", isa, p);
+ return;
+ }
+}
+
+/* Implement TARGET_HANDLE_OPTION. */
+
+static bool
+riscv_handle_option (struct gcc_options *opts,
+ struct gcc_options *opts_set ATTRIBUTE_UNUSED,
+ const struct cl_decoded_option *decoded,
+ location_t loc)
+{
+ switch (decoded->opt_index)
+ {
+ case OPT_march_:
+ riscv_parse_arch_string (decoded->arg, &opts->x_target_flags, loc);
+ return true;
+
+ default:
+ return true;
+ }
+}
+
+/* Implement TARGET_OPTION_OPTIMIZATION_TABLE. */
+static const struct default_options riscv_option_optimization_table[] =
+ {
+ { OPT_LEVELS_1_PLUS, OPT_fsection_anchors, NULL, 1 },
+ { OPT_LEVELS_1_PLUS, OPT_fomit_frame_pointer, NULL, 1 },
+ { OPT_LEVELS_2_PLUS, OPT_free, NULL, 1 },
+ { OPT_LEVELS_NONE, 0, NULL, 0 }
+ };
+
+#undef TARGET_OPTION_OPTIMIZATION_TABLE
+#define TARGET_OPTION_OPTIMIZATION_TABLE riscv_option_optimization_table
+
+#undef TARGET_HANDLE_OPTION
+#define TARGET_HANDLE_OPTION riscv_handle_option
+
+struct gcc_targetm_common targetm_common = TARGETM_COMMON_INITIALIZER;
diff --git a/gcc/config.gcc b/gcc/config.gcc
index 1d5b23f..263739c 100644
--- a/gcc/config.gcc
+++ b/gcc/config.gcc
@@ -453,6 +453,10 @@ powerpc*-*-*)
esac
extra_options="${extra_options} g.opt fused-madd.opt rs6000/rs6000-tables.opt"
;;
+riscv*)
+ cpu_type=riscv
+ extra_objs="riscv-builtins.o riscv-c.o"
+ ;;
rs6000*-*-*)
extra_options="${extra_options} g.opt fused-madd.opt rs6000/rs6000-tables.opt"
;;
@@ -2039,6 +2043,34 @@ microblaze*-*-elf)
cxx_target_objs="${cxx_target_objs} microblaze-c.o"
tmake_file="${tmake_file} microblaze/t-microblaze"
;;
+riscv*-*-linux*)
+ tm_file="elfos.h gnu-user.h linux.h glibc-stdint.h ${tm_file} riscv/linux.h"
+ case "x${enable_multilib}" in
+ xno) ;;
+ xyes) tmake_file="${tmake_file} riscv/t-linux-multilib" ;;
+ *) echo "Unknown value for enable_multilib"; exit 1
+ esac
+ tmake_file="${tmake_file} riscv/t-riscv riscv/t-linux"
+ gnu_ld=yes
+ gas=yes
+ # Force .init_array support. The configure script cannot always
+ # automatically detect that GAS supports it, yet we require it.
+ gcc_cv_initfini_array=yes
+ ;;
+riscv*-*-elf*)
+ tm_file="elfos.h newlib-stdint.h ${tm_file} riscv/elf.h"
+ case "x${enable_multilib}" in
+ xno) ;;
+ xyes) tmake_file="${tmake_file} riscv/t-elf-multilib" ;;
+ *) echo "Unknown value for enable_multilib"; exit 1
+ esac
+ tmake_file="${tmake_file} riscv/t-riscv"
+ gnu_ld=yes
+ gas=yes
+ # Force .init_array support. The configure script cannot always
+ # automatically detect that GAS supports it, yet we require it.
+ gcc_cv_initfini_array=yes
+ ;;
mips*-*-netbsd*) # NetBSD/mips, either endian.
target_cpu_default="MASK_ABICALLS"
tm_file="elfos.h ${tm_file} mips/elf.h netbsd.h netbsd-elf.h mips/netbsd.h"
@@ -3970,6 +4002,70 @@ case "${target}" in
done
;;
+ riscv*-*-*)
+ supported_defaults="abi arch tune"
+
+ case "${target}" in
+ riscv32*) xlen=32 ;;
+ riscv64*) xlen=64 ;;
+ *) echo "Unsupported RISC-V target ${target}" 1>&2; exit 1 ;;
+ esac
+
+ # Infer arch from --with-arch, --target, and --with-abi.
+ case "${with_arch}" in
+ rv32i* | rv32g* | rv64i* | rv64g*)
+ # OK.
+ ;;
+ "")
+ # Infer XLEN, but otherwise assume GC.
+ case "${with_abi}" in
+ ilp32 | ilp32f | ilp32d) with_arch="rv32gc" ;;
+ lp64 | lp64f | lp64d) with_arch="rv64gc" ;;
+ *) with_arch="rv${xlen}gc" ;;
+ esac
+ ;;
+ *)
+ echo "--with-arch=${with_arch} is not supported. The argument must begin with rv32i, rv32g, rv64i, or rv64g." 1>&2
+ exit 1
+ ;;
+ esac
+
+ # Make sure --with-abi is valid. If it was not specified,
+ # pick a default based on the ISA, preferring soft-float
+ # unless the D extension is present.
+ case "${with_abi}" in
+ ilp32 | ilp32f | ilp32d | lp64 | lp64f | lp64d)
+ ;;
+ "")
+ case "${with_arch}" in
+ rv32*d* | rv32g*) with_abi=ilp32d ;;
+ rv32*) with_abi=ilp32 ;;
+ rv64*d* | rv64g*) with_abi=lp64d ;;
+ rv64*) with_abi=lp64 ;;
+ esac
+ ;;
+ *)
+ echo "--with-abi=${with_abi} is not supported" 1>&2
+ exit 1
+ ;;
+ esac
+
+ # Make sure ABI and ISA are compatible.
+ case "${with_abi},${with_arch}" in
+ ilp32,rv32* \
+ | ilp32f,rv32*f* | ilp32f,rv32g* \
+ | ilp32d,rv32*d* | ilp32d,rv32g* \
+ | lp64,rv64* \
+ | lp64f,rv64*f* | lp64f,rv64g* \
+ | lp64d,rv64*d* | lp64d,rv64g*)
+ ;;
+ *)
+ echo "--with-abi=${with_abi} is not supported for ISA ${with_arch}" 1>&2
+ exit 1
+ ;;
+ esac
+ ;;
+
mips*-*-*)
supported_defaults="abi arch arch_32 arch_64 float fpu nan fp_32 odd_spreg_32 tune tune_32 tune_64 divide llsc mips-plt synci"
diff --git a/gcc/config/riscv/constraints.md b/gcc/config/riscv/constraints.md
new file mode 100644
index 0000000..ae93788
--- /dev/null
+++ b/gcc/config/riscv/constraints.md
@@ -0,0 +1,78 @@
+;; Constraint definitions for RISC-V target.
+;; Copyright (C) 2011-2017 Free Software Foundation, Inc.
+;; Contributed by Andrew Waterman (andrew@sifive.com).
+;; Based on MIPS target for GNU compiler.
+;;
+;; This file is part of GCC.
+;;
+;; GCC is free software; you can redistribute it and/or modify
+;; it under the terms of the GNU General Public License as published by
+;; the Free Software Foundation; either version 3, or (at your option)
+;; any later version.
+;;
+;; GCC is distributed in the hope that it will be useful,
+;; but WITHOUT ANY WARRANTY; without even the implied warranty of
+;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+;; GNU General Public License for more details.
+;;
+;; You should have received a copy of the GNU General Public License
+;; along with GCC; see the file COPYING3. If not see
+;; <http://www.gnu.org/licenses/>.
+
+;; Register constraints
+
+(define_register_constraint "f" "TARGET_HARD_FLOAT ? FP_REGS : NO_REGS"
+ "A floating-point register (if available).")
+
+(define_register_constraint "j" "SIBCALL_REGS"
+ "@internal")
+
+;; Avoid using register t0 for JALR's argument, because for some
+;; microarchitectures that is a return-address stack hint.
+(define_register_constraint "l" "JALR_REGS"
+ "@internal")
+
+;; General constraints
+
+(define_constraint "I"
+ "An I-type 12-bit signed immediate."
+ (and (match_code "const_int")
+ (match_test "SMALL_OPERAND (ival)")))
+
+(define_constraint "J"
+ "Integer zero."
+ (and (match_code "const_int")
+ (match_test "ival == 0")))
+
+(define_constraint "K"
+ "A 5-bit unsigned immediate for CSR access instructions."
+ (and (match_code "const_int")
+ (match_test "IN_RANGE (ival, 0, 31)")))
+
+;; Floating-point constant +0.0, used for FCVT-based moves when FMV is
+;; not available in RV32.
+(define_constraint "G"
+ "@internal"
+ (and (match_code "const_double")
+ (match_test "op == CONST0_RTX (mode)")))
+
+(define_memory_constraint "A"
+ "An address that is held in a general-purpose register."
+ (and (match_code "mem")
+ (match_test "GET_CODE(XEXP(op,0)) == REG")))
+
+(define_constraint "S"
+ "@internal
+ A constant call address."
+ (match_operand 0 "absolute_symbolic_operand"))
+
+(define_constraint "U"
+ "@internal
+ A PLT-indirect call address."
+ (match_operand 0 "plt_symbolic_operand"))
+
+(define_constraint "T"
+ "@internal
+ A constant @code{move_operand}."
+ (and (match_operand 0 "move_operand")
+ (match_test "CONSTANT_P (op)")))
diff --git a/gcc/config/riscv/elf.h b/gcc/config/riscv/elf.h
new file mode 100644
index 0000000..391e59f
--- /dev/null
+++ b/gcc/config/riscv/elf.h
@@ -0,0 +1,35 @@
+/* Target macros for riscv*-elf targets.
+ Copyright (C) 1994-2017 Free Software Foundation, Inc.
+
+This file is part of GCC.
+
+GCC is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 3, or (at your option)
+any later version.
+
+GCC is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GCC; see the file COPYING3. If not see
+<http://www.gnu.org/licenses/>. */
+
+#define LINK_SPEC "\
+-melf" XLEN_SPEC "lriscv \
+%{shared}"
+
+/* Link against Newlib libraries, because the ELF backend assumes Newlib.
+ Handle the circular dependence between libc and libgloss. */
+#undef LIB_SPEC
+#define LIB_SPEC "--start-group -lc -lgloss --end-group"
+
+#undef STARTFILE_SPEC
+#define STARTFILE_SPEC "crt0%O%s crtbegin%O%s"
+
+#undef ENDFILE_SPEC
+#define ENDFILE_SPEC "crtend%O%s"
+
+#define NO_IMPLICIT_EXTERN_C 1
diff --git a/gcc/config/riscv/generic.md b/gcc/config/riscv/generic.md
new file mode 100644
index 0000000..294c7ef
--- /dev/null
+++ b/gcc/config/riscv/generic.md
@@ -0,0 +1,78 @@
+;; Generic DFA-based pipeline description for RISC-V targets.
+;; Copyright (C) 2011-2017 Free Software Foundation, Inc.
+;; Contributed by Andrew Waterman (andrew@sifive.com).
+;; Based on MIPS target for GNU compiler.
+
+;; This file is part of GCC.
+
+;; GCC is free software; you can redistribute it and/or modify it
+;; under the terms of the GNU General Public License as published
+;; by the Free Software Foundation; either version 3, or (at your
+;; option) any later version.
+
+;; GCC is distributed in the hope that it will be useful, but WITHOUT
+;; ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+;; or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
+;; License for more details.
+
+;; You should have received a copy of the GNU General Public License
+;; along with GCC; see the file COPYING3. If not see
+;; <http://www.gnu.org/licenses/>.
+
+
+(define_automaton "pipe0")
+(define_cpu_unit "alu" "pipe0")
+(define_cpu_unit "imuldiv" "pipe0")
+(define_cpu_unit "fdivsqrt" "pipe0")
+
+(define_insn_reservation "generic_alu" 1
+ (eq_attr "type" "unknown,const,arith,shift,slt,multi,nop,logical,move")
+ "alu")
+
+(define_insn_reservation "generic_load" 3
+ (eq_attr "type" "load,fpload")
+ "alu")
+
+(define_insn_reservation "generic_store" 1
+ (eq_attr "type" "store,fpstore")
+ "alu")
+
+(define_insn_reservation "generic_xfer" 3
+ (eq_attr "type" "mfc,mtc,fcvt,fmove,fcmp")
+ "alu")
+
+(define_insn_reservation "generic_branch" 1
+ (eq_attr "type" "branch,jump,call")
+ "alu")
+
+(define_insn_reservation "generic_imul" 10
+ (eq_attr "type" "imul")
+ "imuldiv*10")
+
+(define_insn_reservation "generic_idivsi" 34
+ (and (eq_attr "type" "idiv")
+ (eq_attr "mode" "SI"))
+ "imuldiv*34")
+
+(define_insn_reservation "generic_idivdi" 66
+ (and (eq_attr "type" "idiv")
+ (eq_attr "mode" "DI"))
+ "imuldiv*66")
+
+(define_insn_reservation "generic_fmul_single" 5
+ (and (eq_attr "type" "fadd,fmul,fmadd")
+ (eq_attr "mode" "SF"))
+ "alu")
+
+(define_insn_reservation "generic_fmul_double" 7
+ (and (eq_attr "type" "fadd,fmul,fmadd")
+ (eq_attr "mode" "DF"))
+ "alu")
+
+(define_insn_reservation "generic_fdiv" 20
+ (eq_attr "type" "fdiv")
+ "fdivsqrt*20")
+
+(define_insn_reservation "generic_fsqrt" 25
+ (eq_attr "type" "fsqrt")
+ "fdivsqrt*25")
diff --git a/gcc/config/riscv/linux.h b/gcc/config/riscv/linux.h
new file mode 100644
index 0000000..ecf424d
--- /dev/null
+++ b/gcc/config/riscv/linux.h
@@ -0,0 +1,44 @@
+/* Definitions for RISC-V GNU/Linux systems with ELF format.
+ Copyright (C) 1998-2017 Free Software Foundation, Inc.
+
+This file is part of GCC.
+
+GCC is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 3, or (at your option)
+any later version.
+
+GCC is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GCC; see the file COPYING3. If not see
+<http://www.gnu.org/licenses/>. */
+
+#define TARGET_OS_CPP_BUILTINS() \
+ do { \
+ GNU_USER_TARGET_OS_CPP_BUILTINS(); \
+ } while (0)
+
+#define GLIBC_DYNAMIC_LINKER "/lib/ld-linux-riscv" XLEN_SPEC "-" ABI_SPEC ".so.1"
+
+/* Because RISC-V only has word-sized atomics, it requries libatomic where
+ others do not. So link libatomic by default, as needed. */
+#undef LIB_SPEC
+#ifdef LD_AS_NEEDED_OPTION
+#define LIB_SPEC GNU_USER_TARGET_LIB_SPEC \
+ " %{pthread:" LD_AS_NEEDED_OPTION " -latomic " LD_NO_AS_NEEDED_OPTION "}"
+#else
+#define LIB_SPEC GNU_USER_TARGET_LIB_SPEC " -latomic "
+#endif
+
+#define LINK_SPEC "\
+-melf" XLEN_SPEC "lriscv \
+%{shared} \
+ %{!shared: \
+ %{!static: \
+ %{rdynamic:-export-dynamic} \
+ -dynamic-linker " GNU_USER_DYNAMIC_LINKER "} \
+ %{static:-static}}"
diff --git a/gcc/config/riscv/multilib-generator b/gcc/config/riscv/multilib-generator
new file mode 100644
index 0000000..50687b4
--- /dev/null
+++ b/gcc/config/riscv/multilib-generator
@@ -0,0 +1,65 @@
+#!/usr/bin/env python
+
+# RISC-V multilib list generator.
+# Copyright (C) 2011-2017 Free Software Foundation, Inc.
+# Contributed by Andrew Waterman (andrew@sifive.com).
+#
+# This file is part of GCC.
+#
+# GCC is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3, or (at your option)
+# any later version.
+#
+# GCC is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with GCC; see the file COPYING3. If not see
+# <http://www.gnu.org/licenses/>.
+
+# Each argument to this script is of the form
+# <primary arch>-<abi>-<additional arches>-<extensions>
+# For example,
+# rv32imafd-ilp32d-rv32g-c,v
+# means that, in addition to rv32imafd, these configurations can also use the
+# rv32imafd-ilp32d libraries: rv32imafdc, rv32imafdv, rv32g, rv32gc, rv32gv
+
+from __future__ import print_function
+import sys
+import collections
+
+arches = collections.OrderedDict()
+abis = collections.OrderedDict()
+required = []
+reuse = []
+
+for cfg in sys.argv[1:]:
+ (arch, abi, extra, ext) = cfg.split('-')
+ arches[arch] = 1
+ abis[abi] = 1
+ extra = list(filter(None, extra.split(',')))
+ ext = list(filter(None, ext.split(',')))
+ alts = sum([[x] + [x + y for y in ext] for x in [arch] + extra], [])
+ alts = alts + [x.replace('imafd', 'g') for x in alts if 'imafd' in x]
+ for alt in alts[1:]:
+ arches[alt] = 1
+ reuse.append('march.%s/mabi.%s=march.%s/mabi.%s' % (arch, abi, alt, abi))
+ required.append('march=%s/mabi=%s' % (arch, abi))
+
+arch_options = '/'.join(['march=%s' % x for x in arches.keys()])
+arch_dirnames = ' \\\n'.join(arches.keys())
+
+abi_options = '/'.join(['mabi=%s' % x for x in abis.keys()])
+abi_dirnames = ' \\\n'.join(abis.keys())
+
+prog = sys.argv[0].split('/')[-1]
+print('# This file was generated by %s with the command:' % prog)
+print('# %s' % ' '.join(sys.argv))
+
+print('MULTILIB_OPTIONS = %s %s' % (arch_options, abi_options))
+print('MULTILIB_DIRNAMES = %s %s' % (arch_dirnames, abi_dirnames))
+print('MULTILIB_REQUIRED = %s' % ' \\\n'.join(required))
+print('MULTILIB_REUSE = %s' % ' \\\n'.join(reuse))
diff --git a/gcc/config/riscv/peephole.md b/gcc/config/riscv/peephole.md
new file mode 100644
index 0000000..7e644e0
--- /dev/null
+++ b/gcc/config/riscv/peephole.md
@@ -0,0 +1,40 @@
+;; Peephole optimizations for RISC-V for GNU compiler.
+;; Copyright (C) 2011-2017 Free Software Foundation, Inc.
+;; Contributed by Andrew Waterman (andrew@sifive.com).
+
+;; This file is part of GCC.
+
+;; GCC is free software; you can redistribute it and/or modify
+;; it under the terms of the GNU General Public License as published by
+;; the Free Software Foundation; either version 3, or (at your option)
+;; any later version.
+
+;; GCC is distributed in the hope that it will be useful,
+;; but WITHOUT ANY WARRANTY; without even the implied warranty of
+;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+;; GNU General Public License for more details.
+
+;; You should have received a copy of the GNU General Public License
+;; along with GCC; see the file COPYING3. If not see
+;; <http://www.gnu.org/licenses/>.
+
+;; Simplify (unsigned long)(unsigned int)a << const
+(define_peephole2
+ [(set (match_operand:DI 0 "register_operand")
+ (ashift:DI (match_operand:DI 1 "register_operand")
+ (match_operand 2 "const_int_operand")))
+ (set (match_operand:DI 3 "register_operand")
+ (lshiftrt:DI (match_dup 0) (match_dup 2)))
+ (set (match_operand:DI 4 "register_operand")
+ (ashift:DI (match_dup 3) (match_operand 5 "const_int_operand")))]
+ "TARGET_64BIT
+ && INTVAL (operands[5]) < INTVAL (operands[2])
+ && (REGNO (operands[3]) == REGNO (operands[4])
+ || peep2_reg_dead_p (3, operands[3]))"
+ [(set (match_dup 0)
+ (ashift:DI (match_dup 1) (match_dup 2)))
+ (set (match_dup 4)
+ (lshiftrt:DI (match_dup 0) (match_operand 5)))]
+{
+ operands[5] = GEN_INT (INTVAL (operands[2]) - INTVAL (operands[5]));
+})
diff --git a/gcc/config/riscv/pic.md b/gcc/config/riscv/pic.md
new file mode 100644
index 0000000..6a29ead
--- /dev/null
+++ b/gcc/config/riscv/pic.md
@@ -0,0 +1,85 @@
+;; PIC codegen for RISC-V for GNU compiler.
+;; Copyright (C) 2011-2017 Free Software Foundation, Inc.
+;; Contributed by Andrew Waterman (andrew@sifive.com).
+
+;; This file is part of GCC.
+
+;; GCC is free software; you can redistribute it and/or modify
+;; it under the terms of the GNU General Public License as published by
+;; the Free Software Foundation; either version 3, or (at your option)
+;; any later version.
+
+;; GCC is distributed in the hope that it will be useful,
+;; but WITHOUT ANY WARRANTY; without even the implied warranty of
+;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+;; GNU General Public License for more details.
+
+;; You should have received a copy of the GNU General Public License
+;; along with GCC; see the file COPYING3. If not see
+;; <http://www.gnu.org/licenses/>.
+
+
+;; Simplify PIC loads to static variables.
+;; These should go away once we figure out how to emit auipc discretely.
+
+(define_insn "*local_pic_load<mode>"
+ [(set (match_operand:ANYI 0 "register_operand" "=r")
+ (mem:ANYI (match_operand 1 "absolute_symbolic_operand" "")))]
+ "USE_LOAD_ADDRESS_MACRO (operands[1])"
+ "<load>\t%0,%1"
+ [(set (attr "length") (const_int 8))])
+
+(define_insn "*local_pic_load<mode>"
+ [(set (match_operand:ANYF 0 "register_operand" "=f")
+ (mem:ANYF (match_operand 1 "absolute_symbolic_operand" "")))
+ (clobber (match_scratch:DI 2 "=r"))]
+ "TARGET_HARD_FLOAT && TARGET_64BIT && USE_LOAD_ADDRESS_MACRO (operands[1])"
+ "<load>\t%0,%1,%2"
+ [(set (attr "length") (const_int 8))])
+
+(define_insn "*local_pic_load<mode>"
+ [(set (match_operand:ANYF 0 "register_operand" "=f")
+ (mem:ANYF (match_operand 1 "absolute_symbolic_operand" "")))
+ (clobber (match_scratch:SI 2 "=r"))]
+ "TARGET_HARD_FLOAT && !TARGET_64BIT && USE_LOAD_ADDRESS_MACRO (operands[1])"
+ "<load>\t%0,%1,%2"
+ [(set (attr "length") (const_int 8))])
+
+(define_insn "*local_pic_loadu<mode>"
+ [(set (match_operand:SUPERQI 0 "register_operand" "=r")
+ (zero_extend:SUPERQI (mem:SUBX (match_operand 1 "absolute_symbolic_operand" ""))))]
+ "USE_LOAD_ADDRESS_MACRO (operands[1])"
+ "<load>u\t%0,%1"
+ [(set (attr "length") (const_int 8))])
+
+(define_insn "*local_pic_storedi<mode>"
+ [(set (mem:ANYI (match_operand 0 "absolute_symbolic_operand" ""))
+ (match_operand:ANYI 1 "reg_or_0_operand" "rJ"))
+ (clobber (match_scratch:DI 2 "=&r"))]
+ "TARGET_64BIT && USE_LOAD_ADDRESS_MACRO (operands[0])"
+ "<store>\t%z1,%0,%2"
+ [(set (attr "length") (const_int 8))])
+
+(define_insn "*local_pic_storesi<mode>"
+ [(set (mem:ANYI (match_operand 0 "absolute_symbolic_operand" ""))
+ (match_operand:ANYI 1 "reg_or_0_operand" "rJ"))
+ (clobber (match_scratch:SI 2 "=&r"))]
+ "!TARGET_64BIT && USE_LOAD_ADDRESS_MACRO (operands[0])"
+ "<store>\t%z1,%0,%2"
+ [(set (attr "length") (const_int 8))])
+
+(define_insn "*local_pic_storedi<mode>"
+ [(set (mem:ANYF (match_operand 0 "absolute_symbolic_operand" ""))
+ (match_operand:ANYF 1 "register_operand" "f"))
+ (clobber (match_scratch:DI 2 "=r"))]
+ "TARGET_HARD_FLOAT && TARGET_64BIT && USE_LOAD_ADDRESS_MACRO (operands[0])"
+ "<store>\t%1,%0,%2"
+ [(set (attr "length") (const_int 8))])
+
+(define_insn "*local_pic_storesi<mode>"
+ [(set (mem:ANYF (match_operand 0 "absolute_symbolic_operand" ""))
+ (match_operand:ANYF 1 "register_operand" "f"))
+ (clobber (match_scratch:SI 2 "=r"))]
+ "TARGET_HARD_FLOAT && !TARGET_64BIT && USE_LOAD_ADDRESS_MACRO (operands[0])"
+ "<store>\t%1,%0,%2"
+ [(set (attr "length") (const_int 8))])
diff --git a/gcc/config/riscv/predicates.md b/gcc/config/riscv/predicates.md
new file mode 100644
index 0000000..854af14
--- /dev/null
+++ b/gcc/config/riscv/predicates.md
@@ -0,0 +1,180 @@
+;; Predicate description for RISC-V target.
+;; Copyright (C) 2011-2017 Free Software Foundation, Inc.
+;; Contributed by Andrew Waterman (andrew@sifive.com).
+;; Based on MIPS target for GNU compiler.
+;;
+;; This file is part of GCC.
+;;
+;; GCC is free software; you can redistribute it and/or modify
+;; it under the terms of the GNU General Public License as published by
+;; the Free Software Foundation; either version 3, or (at your option)
+;; any later version.
+;;
+;; GCC is distributed in the hope that it will be useful,
+;; but WITHOUT ANY WARRANTY; without even the implied warranty of
+;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+;; GNU General Public License for more details.
+;;
+;; You should have received a copy of the GNU General Public License
+;; along with GCC; see the file COPYING3. If not see
+;; <http://www.gnu.org/licenses/>.
+
+(define_predicate "const_arith_operand"
+ (and (match_code "const_int")
+ (match_test "SMALL_OPERAND (INTVAL (op))")))
+
+(define_predicate "arith_operand"
+ (ior (match_operand 0 "const_arith_operand")
+ (match_operand 0 "register_operand")))
+
+(define_predicate "const_csr_operand"
+ (and (match_code "const_int")
+ (match_test "IN_RANGE (INTVAL (op), 0, 31)")))
+
+(define_predicate "csr_operand"
+ (ior (match_operand 0 "const_csr_operand")
+ (match_operand 0 "register_operand")))
+
+(define_predicate "sle_operand"
+ (and (match_code "const_int")
+ (match_test "SMALL_OPERAND (INTVAL (op) + 1)")))
+
+(define_predicate "sleu_operand"
+ (and (match_operand 0 "sle_operand")
+ (match_test "INTVAL (op) + 1 != 0")))
+
+(define_predicate "const_0_operand"
+ (and (match_code "const_int,const_wide_int,const_double,const_vector")
+ (match_test "op == CONST0_RTX (GET_MODE (op))")))
+
+(define_predicate "reg_or_0_operand"
+ (ior (match_operand 0 "const_0_operand")
+ (match_operand 0 "register_operand")))
+
+;; Only use branch-on-bit sequences when the mask is not an ANDI immediate.
+(define_predicate "branch_on_bit_operand"
+ (and (match_code "const_int")
+ (match_test "INTVAL (op) >= IMM_BITS - 1")))
+
+;; A legitimate CONST_INT operand that takes more than one instruction
+;; to load.
+(define_predicate "splittable_const_int_operand"
+ (match_code "const_int")
+{
+ /* Don't handle multi-word moves this way; we don't want to introduce
+ the individual word-mode moves until after reload. */
+ if (GET_MODE_SIZE (mode) > UNITS_PER_WORD)
+ return false;
+
+ /* Otherwise check whether the constant can be loaded in a single
+ instruction. */
+ return !LUI_OPERAND (INTVAL (op)) && !SMALL_OPERAND (INTVAL (op));
+})
+
+(define_predicate "move_operand"
+ (match_operand 0 "general_operand")
+{
+ enum riscv_symbol_type symbol_type;
+
+ /* The thinking here is as follows:
+
+ (1) The move expanders should split complex load sequences into
+ individual instructions. Those individual instructions can
+ then be optimized by all rtl passes.
+
+ (2) The target of pre-reload load sequences should not be used
+ to store temporary results. If the target register is only
+ assigned one value, reload can rematerialize that value
+ on demand, rather than spill it to the stack.
+
+ (3) If we allowed pre-reload passes like combine and cse to recreate
+ complex load sequences, we would want to be able to split the
+ sequences before reload as well, so that the pre-reload scheduler
+ can see the individual instructions. This falls foul of (2);
+ the splitter would be forced to reuse the target register for
+ intermediate results.
+
+ (4) We want to define complex load splitters for combine. These
+ splitters can request a temporary scratch register, which avoids
+ the problem in (2). They allow things like:
+
+ (set (reg T1) (high SYM))
+ (set (reg T2) (low (reg T1) SYM))
+ (set (reg X) (plus (reg T2) (const_int OFFSET)))
+
+ to be combined into:
+
+ (set (reg T3) (high SYM+OFFSET))
+ (set (reg X) (lo_sum (reg T3) SYM+OFFSET))
+
+ if T2 is only used this once. */
+ switch (GET_CODE (op))
+ {
+ case CONST_INT:
+ return !splittable_const_int_operand (op, mode);
+
+ case CONST:
+ case SYMBOL_REF:
+ case LABEL_REF:
+ return riscv_symbolic_constant_p (op, &symbol_type)
+ && !riscv_split_symbol_type (symbol_type);
+
+ case HIGH:
+ op = XEXP (op, 0);
+ return riscv_symbolic_constant_p (op, &symbol_type)
+ && riscv_split_symbol_type (symbol_type)
+ && symbol_type != SYMBOL_PCREL;
+
+ default:
+ return true;
+ }
+})
+
+(define_predicate "symbolic_operand"
+ (match_code "const,symbol_ref,label_ref")
+{
+ enum riscv_symbol_type type;
+ return riscv_symbolic_constant_p (op, &type);
+})
+
+(define_predicate "absolute_symbolic_operand"
+ (match_code "const,symbol_ref,label_ref")
+{
+ enum riscv_symbol_type type;
+ return (riscv_symbolic_constant_p (op, &type)
+ && (type == SYMBOL_ABSOLUTE || type == SYMBOL_PCREL));
+})
+
+(define_predicate "plt_symbolic_operand"
+ (match_code "const,symbol_ref,label_ref")
+{
+ enum riscv_symbol_type type;
+ return (riscv_symbolic_constant_p (op, &type)
+ && type == SYMBOL_GOT_DISP && !SYMBOL_REF_WEAK (op) && TARGET_PLT);
+})
+
+(define_predicate "call_insn_operand"
+ (ior (match_operand 0 "absolute_symbolic_operand")
+ (match_operand 0 "plt_symbolic_operand")
+ (match_operand 0 "register_operand")))
+
+(define_predicate "modular_operator"
+ (match_code "plus,minus,mult,ashift"))
+
+(define_predicate "equality_operator"
+ (match_code "eq,ne"))
+
+(define_predicate "order_operator"
+ (match_code "eq,ne,lt,ltu,le,leu,ge,geu,gt,gtu"))
+
+(define_predicate "signed_order_operator"
+ (match_code "eq,ne,lt,le,ge,gt"))
+
+(define_predicate "fp_native_comparison"
+ (match_code "eq,lt,le,gt,ge"))
+
+(define_predicate "fp_scc_comparison"
+ (match_code "unordered,ordered,unlt,unge,unle,ungt,ltgt,ne,eq,lt,le,gt,ge"))
+
+(define_predicate "fp_branch_comparison"
+ (match_code "unordered,ordered,unlt,unge,unle,ungt,uneq,ltgt,ne,eq,lt,le,gt,ge"))
diff --git a/gcc/config/riscv/riscv-builtins.c b/gcc/config/riscv/riscv-builtins.c
new file mode 100644
index 0000000..626a6a3
--- /dev/null
+++ b/gcc/config/riscv/riscv-builtins.c
@@ -0,0 +1,287 @@
+/* Subroutines used for expanding RISC-V builtins.
+ Copyright (C) 2011-2017 Free Software Foundation, Inc.
+ Contributed by Andrew Waterman (andrew@sifive.com).
+
+This file is part of GCC.
+
+GCC is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 3, or (at your option)
+any later version.
+
+GCC is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GCC; see the file COPYING3. If not see
+<http://www.gnu.org/licenses/>. */
+
+#include "config.h"
+#include "system.h"
+#include "coretypes.h"
+#include "tm.h"
+#include "rtl.h"
+#include "tree.h"
+#include "gimple-expr.h"
+
+#include "expmed.h"
+#include "optabs.h"
+#include "recog.h"
+#include "diagnostic-core.h"
+#include "stor-layout.h"
+#include "expr.h"
+#include "langhooks.h"
+
+/* Macros to create an enumeration identifier for a function prototype. */
+#define RISCV_FTYPE_NAME1(A, B) RISCV_##A##_FTYPE_##B
+
+/* Classifies the prototype of a built-in function. */
+enum riscv_function_type {
+#define DEF_RISCV_FTYPE(NARGS, LIST) RISCV_FTYPE_NAME##NARGS LIST,
+#include "config/riscv/riscv-ftypes.def"
+#undef DEF_RISCV_FTYPE
+ RISCV_MAX_FTYPE_MAX
+};
+
+/* Specifies how a built-in function should be converted into rtl. */
+enum riscv_builtin_type {
+ /* The function corresponds directly to an .md pattern. */
+ RISCV_BUILTIN_DIRECT,
+
+ /* Likewise, but with return type VOID. */
+ RISCV_BUILTIN_DIRECT_NO_TARGET
+};
+
+/* Declare an availability predicate for built-in functions. */
+#define AVAIL(NAME, COND) \
+ static unsigned int \
+ riscv_builtin_avail_##NAME (void) \
+ { \
+ return (COND); \
+ }
+
+/* This structure describes a single built-in function. */
+struct riscv_builtin_description {
+ /* The code of the main .md file instruction. See riscv_builtin_type
+ for more information. */
+ enum insn_code icode;
+
+ /* The name of the built-in function. */
+ const char *name;
+
+ /* Specifies how the function should be expanded. */
+ enum riscv_builtin_type builtin_type;
+
+ /* The function's prototype. */
+ enum riscv_function_type prototype;
+
+ /* Whether the function is available. */
+ unsigned int (*avail) (void);
+};
+
+AVAIL (hard_float, TARGET_HARD_FLOAT)
+
+/* Construct a riscv_builtin_description from the given arguments.
+
+ INSN is the name of the associated instruction pattern, without the
+ leading CODE_FOR_riscv_.
+
+ NAME is the name of the function itself, without the leading
+ "__builtin_riscv_".
+
+ BUILTIN_TYPE and FUNCTION_TYPE are riscv_builtin_description fields.
+
+ AVAIL is the name of the availability predicate, without the leading
+ riscv_builtin_avail_. */
+#define RISCV_BUILTIN(INSN, NAME, BUILTIN_TYPE, FUNCTION_TYPE, AVAIL) \
+ { CODE_FOR_riscv_ ## INSN, "__builtin_riscv_" NAME, \
+ BUILTIN_TYPE, FUNCTION_TYPE, riscv_builtin_avail_ ## AVAIL }
+
+/* Define __builtin_riscv_<INSN>, which is a RISCV_BUILTIN_DIRECT function
+ mapped to instruction CODE_FOR_riscv_<INSN>, FUNCTION_TYPE and AVAIL
+ are as for RISCV_BUILTIN. */
+#define DIRECT_BUILTIN(INSN, FUNCTION_TYPE, AVAIL) \
+ RISCV_BUILTIN (INSN, #INSN, RISCV_BUILTIN_DIRECT, FUNCTION_TYPE, AVAIL)
+
+/* Define __builtin_riscv_<INSN>, which is a RISCV_BUILTIN_DIRECT_NO_TARGET
+ function mapped to instruction CODE_FOR_riscv_<INSN>, FUNCTION_TYPE
+ and AVAIL are as for RISCV_BUILTIN. */
+#define DIRECT_NO_TARGET_BUILTIN(INSN, FUNCTION_TYPE, AVAIL) \
+ RISCV_BUILTIN (INSN, #INSN, RISCV_BUILTIN_DIRECT_NO_TARGET, \
+ FUNCTION_TYPE, AVAIL)
+
+/* Argument types. */
+#define RISCV_ATYPE_VOID void_type_node
+#define RISCV_ATYPE_USI unsigned_intSI_type_node
+
+/* RISCV_FTYPE_ATYPESN takes N RISCV_FTYPES-like type codes and lists
+ their associated RISCV_ATYPEs. */
+#define RISCV_FTYPE_ATYPES1(A, B) \
+ RISCV_ATYPE_##A, RISCV_ATYPE_##B
+
+static const struct riscv_builtin_description riscv_builtins[] = {
+ DIRECT_BUILTIN (frflags, RISCV_USI_FTYPE_VOID, hard_float),
+ DIRECT_NO_TARGET_BUILTIN (fsflags, RISCV_VOID_FTYPE_USI, hard_float)
+};
+
+/* Index I is the function declaration for riscv_builtins[I], or null if the
+ function isn't defined on this target. */
+static GTY(()) tree riscv_builtin_decls[ARRAY_SIZE (riscv_builtins)];
+
+/* Get the index I of the function declaration for riscv_builtin_decls[I]
+ using the instruction code or return null if not defined for the target. */
+static GTY(()) int riscv_builtin_decl_index[NUM_INSN_CODES];
+
+#define GET_BUILTIN_DECL(CODE) \
+ riscv_builtin_decls[riscv_builtin_decl_index[(CODE)]]
+
+/* Return the function type associated with function prototype TYPE. */
+
+static tree
+riscv_build_function_type (enum riscv_function_type type)
+{
+ static tree types[(int) RISCV_MAX_FTYPE_MAX];
+
+ if (types[(int) type] == NULL_TREE)
+ switch (type)
+ {
+#define DEF_RISCV_FTYPE(NUM, ARGS) \
+ case RISCV_FTYPE_NAME##NUM ARGS: \
+ types[(int) type] \
+ = build_function_type_list (RISCV_FTYPE_ATYPES##NUM ARGS, \
+ NULL_TREE); \
+ break;
+#include "config/riscv/riscv-ftypes.def"
+#undef DEF_RISCV_FTYPE
+ default:
+ gcc_unreachable ();
+ }
+
+ return types[(int) type];
+}
+
+/* Implement TARGET_INIT_BUILTINS. */
+
+void
+riscv_init_builtins (void)
+{
+ for (size_t i = 0; i < ARRAY_SIZE (riscv_builtins); i++)
+ {
+ const struct riscv_builtin_description *d = &riscv_builtins[i];
+ if (d->avail ())
+ {
+ tree type = riscv_build_function_type (d->prototype);
+ riscv_builtin_decls[i]
+ = add_builtin_function (d->name, type, i, BUILT_IN_MD, NULL, NULL);
+ riscv_builtin_decl_index[d->icode] = i;
+ }
+ }
+}
+
+/* Implement TARGET_BUILTIN_DECL. */
+
+tree
+riscv_builtin_decl (unsigned int code, bool initialize_p ATTRIBUTE_UNUSED)
+{
+ if (code >= ARRAY_SIZE (riscv_builtins))
+ return error_mark_node;
+ return riscv_builtin_decls[code];
+}
+
+/* Take argument ARGNO from EXP's argument list and convert it into
+ an expand operand. Store the operand in *OP. */
+
+static void
+riscv_prepare_builtin_arg (struct expand_operand *op, tree exp, unsigned argno)
+{
+ tree arg = CALL_EXPR_ARG (exp, argno);
+ create_input_operand (op, expand_normal (arg), TYPE_MODE (TREE_TYPE (arg)));
+}
+
+/* Expand instruction ICODE as part of a built-in function sequence.
+ Use the first NOPS elements of OPS as the instruction's operands.
+ HAS_TARGET_P is true if operand 0 is a target; it is false if the
+ instruction has no target.
+
+ Return the target rtx if HAS_TARGET_P, otherwise return const0_rtx. */
+
+static rtx
+riscv_expand_builtin_insn (enum insn_code icode, unsigned int n_ops,
+ struct expand_operand *ops, bool has_target_p)
+{
+ if (!maybe_expand_insn (icode, n_ops, ops))
+ {
+ error ("invalid argument to built-in function");
+ return has_target_p ? gen_reg_rtx (ops[0].mode) : const0_rtx;
+ }
+
+ return has_target_p ? ops[0].value : const0_rtx;
+}
+
+/* Expand a RISCV_BUILTIN_DIRECT or RISCV_BUILTIN_DIRECT_NO_TARGET function;
+ HAS_TARGET_P says which. EXP is the CALL_EXPR that calls the function
+ and ICODE is the code of the associated .md pattern. TARGET, if nonnull,
+ suggests a good place to put the result. */
+
+static rtx
+riscv_expand_builtin_direct (enum insn_code icode, rtx target, tree exp,
+ bool has_target_p)
+{
+ struct expand_operand ops[MAX_RECOG_OPERANDS];
+
+ /* Map any target to operand 0. */
+ int opno = 0;
+ if (has_target_p)
+ create_output_operand (&ops[opno++], target, TYPE_MODE (TREE_TYPE (exp)));
+
+ /* Map the arguments to the other operands. */
+ gcc_assert (opno + call_expr_nargs (exp)
+ == insn_data[icode].n_generator_args);
+ for (int argno = 0; argno < call_expr_nargs (exp); argno++)
+ riscv_prepare_builtin_arg (&ops[opno++], exp, argno);
+
+ return riscv_expand_builtin_insn (icode, opno, ops, has_target_p);
+}
+
+/* Implement TARGET_EXPAND_BUILTIN. */
+
+rtx
+riscv_expand_builtin (tree exp, rtx target, rtx subtarget ATTRIBUTE_UNUSED,
+ machine_mode mode ATTRIBUTE_UNUSED,
+ int ignore ATTRIBUTE_UNUSED)
+{
+ tree fndecl = TREE_OPERAND (CALL_EXPR_FN (exp), 0);
+ unsigned int fcode = DECL_FUNCTION_CODE (fndecl);
+ const struct riscv_builtin_description *d = &riscv_builtins[fcode];
+
+ switch (d->builtin_type)
+ {
+ case RISCV_BUILTIN_DIRECT:
+ return riscv_expand_builtin_direct (d->icode, target, exp, true);
+
+ case RISCV_BUILTIN_DIRECT_NO_TARGET:
+ return riscv_expand_builtin_direct (d->icode, target, exp, false);
+ }
+
+ gcc_unreachable ();
+}
+
+/* Implement TARGET_ATOMIC_ASSIGN_EXPAND_FENV. */
+
+void
+riscv_atomic_assign_expand_fenv (tree *hold, tree *clear, tree *update)
+{
+ if (!TARGET_HARD_FLOAT)
+ return;
+
+ tree frflags = GET_BUILTIN_DECL (CODE_FOR_riscv_frflags);
+ tree fsflags = GET_BUILTIN_DECL (CODE_FOR_riscv_fsflags);
+ tree old_flags = create_tmp_var_raw (RISCV_ATYPE_USI);
+
+ *hold = build2 (MODIFY_EXPR, RISCV_ATYPE_USI, old_flags,
+ build_call_expr (frflags, 0));
+ *clear = build_call_expr (fsflags, 1, old_flags);
+ *update = NULL_TREE;
+}
diff --git a/gcc/config/riscv/riscv-c.c b/gcc/config/riscv/riscv-c.c
new file mode 100644
index 0000000..64e7cf8
--- /dev/null
+++ b/gcc/config/riscv/riscv-c.c
@@ -0,0 +1,92 @@
+/* RISC-V-specific code for C family languages.
+ Copyright (C) 2011-2017 Free Software Foundation, Inc.
+ Contributed by Andrew Waterman (andrew@sifive.com).
+
+This file is part of GCC.
+
+GCC is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 3, or (at your option)
+any later version.
+
+GCC is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GCC; see the file COPYING3. If not see
+<http://www.gnu.org/licenses/>. */
+
+#include "config.h"
+#include "system.h"
+#include "coretypes.h"
+#include "tm.h"
+#include "c-family/c-common.h"
+#include "cpplib.h"
+
+#define builtin_define(TXT) cpp_define (pfile, TXT)
+
+/* Implement TARGET_CPU_CPP_BUILTINS. */
+
+void
+riscv_cpu_cpp_builtins (cpp_reader *pfile)
+{
+ builtin_define ("__riscv");
+
+ if (TARGET_RVC)
+ builtin_define ("__riscv_compressed");
+
+ if (TARGET_ATOMIC)
+ builtin_define ("__riscv_atomic");
+
+ if (TARGET_MUL)
+ builtin_define ("__riscv_mul");
+ if (TARGET_DIV)
+ builtin_define ("__riscv_div");
+ if (TARGET_DIV && TARGET_MUL)
+ builtin_define ("__riscv_muldiv");
+
+ builtin_define_with_int_value ("__riscv_xlen", UNITS_PER_WORD * 8);
+ if (TARGET_HARD_FLOAT)
+ builtin_define_with_int_value ("__riscv_flen", UNITS_PER_FP_REG * 8);
+
+ if (TARGET_HARD_FLOAT && TARGET_FDIV)
+ {
+ builtin_define ("__riscv_fdiv");
+ builtin_define ("__riscv_fsqrt");
+ }
+
+ switch (riscv_abi)
+ {
+ case ABI_ILP32:
+ case ABI_LP64:
+ builtin_define ("__riscv_float_abi_soft");
+ break;
+
+ case ABI_ILP32F:
+ case ABI_LP64F:
+ builtin_define ("__riscv_float_abi_single");
+ break;
+
+ case ABI_ILP32D:
+ case ABI_LP64D:
+ builtin_define ("__riscv_float_abi_double");
+ break;
+ }
+
+ switch (riscv_cmodel)
+ {
+ case CM_MEDLOW:
+ builtin_define ("__riscv_cmodel_medlow");
+ break;
+
+ case CM_MEDANY:
+ builtin_define ("__riscv_cmodel_medany");
+ break;
+
+ case CM_PIC:
+ builtin_define ("__riscv_cmodel_pic");
+ break;
+ }
+}
diff --git a/gcc/config/riscv/riscv-ftypes.def b/gcc/config/riscv/riscv-ftypes.def
new file mode 100644
index 0000000..eb69148
--- /dev/null
+++ b/gcc/config/riscv/riscv-ftypes.def
@@ -0,0 +1,30 @@
+/* Definitions of prototypes for RISC-V built-in functions. -*- C -*-
+ Copyright (C) 2011-2017 Free Software Foundation, Inc.
+ Contributed by Andrew Waterman (andrew@sifive.com).
+ Based on MIPS target for GNU compiler.
+
+This file is part of GCC.
+
+GCC is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 3, or (at your option)
+any later version.
+
+GCC is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GCC; see the file COPYING3. If not see
+<http://www.gnu.org/licenses/>. */
+
+/* Invoke DEF_RISCV_FTYPE (NARGS, LIST) for each prototype used by
+ RISCV built-in functions, where:
+
+ NARGS is the number of arguments.
+ LIST contains the return-type code followed by the codes for each
+ argument type. */
+
+DEF_RISCV_FTYPE (1, (USI, VOID))
+DEF_RISCV_FTYPE (1, (VOID, USI))
diff --git a/gcc/config/riscv/riscv-modes.def b/gcc/config/riscv/riscv-modes.def
new file mode 100644
index 0000000..5c65667
--- /dev/null
+++ b/gcc/config/riscv/riscv-modes.def
@@ -0,0 +1,22 @@
+/* Extra machine modes for RISC-V target.
+ Copyright (C) 2011-2017 Free Software Foundation, Inc.
+ Contributed by Andrew Waterman (andrew@sifive.com).
+ Based on MIPS target for GNU compiler.
+
+This file is part of GCC.
+
+GCC is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 3, or (at your option)
+any later version.
+
+GCC is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GCC; see the file COPYING3. If not see
+<http://www.gnu.org/licenses/>. */
+
+FLOAT_MODE (TF, 16, ieee_quad_format);
diff --git a/gcc/config/riscv/riscv-opts.h b/gcc/config/riscv/riscv-opts.h
new file mode 100644
index 0000000..2b19233
--- /dev/null
+++ b/gcc/config/riscv/riscv-opts.h
@@ -0,0 +1,41 @@
+/* Definition of RISC-V target for GNU compiler.
+ Copyright (C) 2016-2017 Free Software Foundation, Inc.
+ Contributed by Andrew Waterman (andrew@sifive.com).
+
+This file is part of GCC.
+
+GCC is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 3, or (at your option)
+any later version.
+
+GCC is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GCC; see the file COPYING3. If not see
+<http://www.gnu.org/licenses/>. */
+
+#ifndef GCC_RISCV_OPTS_H
+#define GCC_RISCV_OPTS_H
+
+enum riscv_abi_type {
+ ABI_ILP32,
+ ABI_ILP32F,
+ ABI_ILP32D,
+ ABI_LP64,
+ ABI_LP64F,
+ ABI_LP64D
+};
+extern enum riscv_abi_type riscv_abi;
+
+enum riscv_code_model {
+ CM_MEDLOW,
+ CM_MEDANY,
+ CM_PIC
+};
+extern enum riscv_code_model riscv_cmodel;
+
+#endif /* ! GCC_RISCV_OPTS_H */
diff --git a/gcc/config/riscv/riscv-protos.h b/gcc/config/riscv/riscv-protos.h
new file mode 100644
index 0000000..de7023f
--- /dev/null
+++ b/gcc/config/riscv/riscv-protos.h
@@ -0,0 +1,83 @@
+/* Definition of RISC-V target for GNU compiler.
+ Copyright (C) 2011-2017 Free Software Foundation, Inc.
+ Contributed by Andrew Waterman (andrew@sifive.com).
+ Based on MIPS target for GNU compiler.
+
+This file is part of GCC.
+
+GCC is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 3, or (at your option)
+any later version.
+
+GCC is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GCC; see the file COPYING3. If not see
+<http://www.gnu.org/licenses/>. */
+
+#ifndef GCC_RISCV_PROTOS_H
+#define GCC_RISCV_PROTOS_H
+
+/* Symbol types we understand. The order of this list must match that of
+ the unspec enum in riscv.md, subsequent to UNSPEC_ADDRESS_FIRST. */
+enum riscv_symbol_type {
+ SYMBOL_ABSOLUTE,
+ SYMBOL_PCREL,
+ SYMBOL_GOT_DISP,
+ SYMBOL_TLS,
+ SYMBOL_TLS_LE,
+ SYMBOL_TLS_IE,
+ SYMBOL_TLS_GD
+};
+#define NUM_SYMBOL_TYPES (SYMBOL_TLS_GD + 1)
+
+/* Routines implemented in riscv.c. */
+extern enum riscv_symbol_type riscv_classify_symbolic_expression (rtx);
+extern bool riscv_symbolic_constant_p (rtx, enum riscv_symbol_type *);
+extern int riscv_regno_mode_ok_for_base_p (int, enum machine_mode, bool);
+extern bool riscv_hard_regno_mode_ok_p (unsigned int, enum machine_mode);
+extern int riscv_address_insns (rtx, enum machine_mode, bool);
+extern int riscv_const_insns (rtx);
+extern int riscv_split_const_insns (rtx);
+extern int riscv_load_store_insns (rtx, rtx_insn *);
+extern rtx riscv_emit_move (rtx, rtx);
+extern bool riscv_split_symbol (rtx, rtx, enum machine_mode, rtx *);
+extern bool riscv_split_symbol_type (enum riscv_symbol_type);
+extern rtx riscv_unspec_address (rtx, enum riscv_symbol_type);
+extern void riscv_move_integer (rtx, rtx, HOST_WIDE_INT);
+extern bool riscv_legitimize_move (enum machine_mode, rtx, rtx);
+extern rtx riscv_subword (rtx, bool);
+extern bool riscv_split_64bit_move_p (rtx, rtx);
+extern void riscv_split_doubleword_move (rtx, rtx);
+extern const char *riscv_output_move (rtx, rtx);
+extern const char *riscv_output_gpr_save (unsigned);
+#ifdef RTX_CODE
+extern void riscv_expand_int_scc (rtx, enum rtx_code, rtx, rtx);
+extern void riscv_expand_float_scc (rtx, enum rtx_code, rtx, rtx);
+extern void riscv_expand_conditional_branch (rtx, enum rtx_code, rtx, rtx);
+#endif
+extern rtx riscv_legitimize_call_address (rtx);
+extern void riscv_set_return_address (rtx, rtx);
+extern bool riscv_expand_block_move (rtx, rtx, rtx);
+extern rtx riscv_return_addr (int, rtx);
+extern HOST_WIDE_INT riscv_initial_elimination_offset (int, int);
+extern void riscv_expand_prologue (void);
+extern void riscv_expand_epilogue (bool);
+extern bool riscv_can_use_return_insn (void);
+extern rtx riscv_function_value (const_tree, const_tree, enum machine_mode);
+extern unsigned int riscv_hard_regno_nregs (int, enum machine_mode);
+
+/* Routines implemented in riscv-c.c. */
+void riscv_cpu_cpp_builtins (cpp_reader *);
+
+/* Routines implemented in riscv-builtins.c. */
+extern void riscv_atomic_assign_expand_fenv (tree *, tree *, tree *);
+extern rtx riscv_expand_builtin (tree, rtx, rtx, enum machine_mode, int);
+extern tree riscv_builtin_decl (unsigned int, bool);
+extern void riscv_init_builtins (void);
+
+#endif /* ! GCC_RISCV_PROTOS_H */
diff --git a/gcc/config/riscv/riscv.c b/gcc/config/riscv/riscv.c
new file mode 100644
index 0000000..11a21bc
--- /dev/null
+++ b/gcc/config/riscv/riscv.c
@@ -0,0 +1,4127 @@
+/* Subroutines used for code generation for RISC-V.
+ Copyright (C) 2011-2017 Free Software Foundation, Inc.
+ Contributed by Andrew Waterman (andrew@sifive.com).
+ Based on MIPS target for GNU compiler.
+
+This file is part of GCC.
+
+GCC is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 3, or (at your option)
+any later version.
+
+GCC is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GCC; see the file COPYING3. If not see
+<http://www.gnu.org/licenses/>. */
+
+#include "config.h"
+#include "system.h"
+#include "coretypes.h"
+#include "tm.h"
+#include "rtl.h"
+#include "regs.h"
+#include "hard-reg-set.h"
+#include "insn-config.h"
+#include "conditions.h"
+#include "insn-attr.h"
+#include "recog.h"
+#include "output.h"
+#include "hash-set.h"
+#include "machmode.h"
+#include "vec.h"
+#include "double-int.h"
+#include "input.h"
+#include "alias.h"
+#include "symtab.h"
+#include "wide-int.h"
+#include "inchash.h"
+#include "tree.h"
+#include "fold-const.h"
+#include "varasm.h"
+#include "stringpool.h"
+#include "stor-layout.h"
+#include "calls.h"
+#include "function.h"
+#include "hashtab.h"
+#include "flags.h"
+#include "statistics.h"
+#include "real.h"
+#include "fixed-value.h"
+#include "expmed.h"
+#include "dojump.h"
+#include "explow.h"
+
+#include "emit-rtl.h"
+#include "stmt.h"
+#include "expr.h"
+#include "insn-codes.h"
+#include "optabs.h"
+#include "libfuncs.h"
+#include "reload.h"
+#include "tm_p.h"
+#include "ggc.h"
+#include "gstab.h"
+#include "hash-table.h"
+#include "debug.h"
+#include "target.h"
+#include "target-def.h"
+#include "common/common-target.h"
+#include "langhooks.h"
+#include "dominance.h"
+#include "cfg.h"
+#include "cfgrtl.h"
+#include "cfganal.h"
+#include "lcm.h"
+#include "cfgbuild.h"
+#include "cfgcleanup.h"
+#include "predict.h"
+#include "basic-block.h"
+#include "bitmap.h"
+#include "regset.h"
+#include "df.h"
+#include "sched-int.h"
+#include "tree-ssa-alias.h"
+#include "internal-fn.h"
+#include "gimple-fold.h"
+#include "tree-eh.h"
+#include "gimple-expr.h"
+#include "is-a.h"
+#include "gimple.h"
+#include "gimplify.h"
+#include "diagnostic.h"
+#include "target-globals.h"
+#include "opts.h"
+#include "tree-pass.h"
+#include "context.h"
+#include "hash-map.h"
+#include "plugin-api.h"
+#include "ipa-ref.h"
+#include "cgraph.h"
+#include "builtins.h"
+#include "rtl-iter.h"
+
+/* True if X is an UNSPEC wrapper around a SYMBOL_REF or LABEL_REF. */
+#define UNSPEC_ADDRESS_P(X) \
+ (GET_CODE (X) == UNSPEC \
+ && XINT (X, 1) >= UNSPEC_ADDRESS_FIRST \
+ && XINT (X, 1) < UNSPEC_ADDRESS_FIRST + NUM_SYMBOL_TYPES)
+
+/* Extract the symbol or label from UNSPEC wrapper X. */
+#define UNSPEC_ADDRESS(X) \
+ XVECEXP (X, 0, 0)
+
+/* Extract the symbol type from UNSPEC wrapper X. */
+#define UNSPEC_ADDRESS_TYPE(X) \
+ ((enum riscv_symbol_type) (XINT (X, 1) - UNSPEC_ADDRESS_FIRST))
+
+/* True if bit BIT is set in VALUE. */
+#define BITSET_P(VALUE, BIT) (((VALUE) & (1ULL << (BIT))) != 0)
+
+/* Classifies an address.
+
+ ADDRESS_REG
+ A natural register + offset address. The register satisfies
+ riscv_valid_base_register_p and the offset is a const_arith_operand.
+
+ ADDRESS_LO_SUM
+ A LO_SUM rtx. The first operand is a valid base register and
+ the second operand is a symbolic address.
+
+ ADDRESS_CONST_INT
+ A signed 16-bit constant address.
+
+ ADDRESS_SYMBOLIC:
+ A constant symbolic address. */
+enum riscv_address_type {
+ ADDRESS_REG,
+ ADDRESS_LO_SUM,
+ ADDRESS_CONST_INT,
+ ADDRESS_SYMBOLIC
+};
+
+/* Information about a function's frame layout. */
+struct GTY(()) riscv_frame_info {
+ /* The size of the frame in bytes. */
+ HOST_WIDE_INT total_size;
+
+ /* Bit X is set if the function saves or restores GPR X. */
+ unsigned int mask;
+
+ /* Likewise FPR X. */
+ unsigned int fmask;
+
+ /* How much the GPR save/restore routines adjust sp (or 0 if unused). */
+ unsigned save_libcall_adjustment;
+
+ /* Offsets of fixed-point and floating-point save areas from frame bottom */
+ HOST_WIDE_INT gp_sp_offset;
+ HOST_WIDE_INT fp_sp_offset;
+
+ /* Offset of virtual frame pointer from stack pointer/frame bottom */
+ HOST_WIDE_INT frame_pointer_offset;
+
+ /* Offset of hard frame pointer from stack pointer/frame bottom */
+ HOST_WIDE_INT hard_frame_pointer_offset;
+
+ /* The offset of arg_pointer_rtx from the bottom of the frame. */
+ HOST_WIDE_INT arg_pointer_offset;
+};
+
+struct GTY(()) machine_function {
+ /* The number of extra stack bytes taken up by register varargs.
+ This area is allocated by the callee at the very top of the frame. */
+ int varargs_size;
+
+ /* Memoized return value of leaf_function_p. <0 if false, >0 if true. */
+ int is_leaf;
+
+ /* The current frame information, calculated by riscv_compute_frame_info. */
+ struct riscv_frame_info frame;
+};
+
+/* Information about a single argument. */
+struct riscv_arg_info {
+ /* True if the argument is at least partially passed on the stack. */
+ bool stack_p;
+
+ /* The number of integer registers allocated to this argument. */
+ unsigned int num_gprs;
+
+ /* The offset of the first register used, provided num_gprs is nonzero.
+ If passed entirely on the stack, the value is MAX_ARGS_IN_REGISTERS. */
+ unsigned int gpr_offset;
+
+ /* The number of floating-point registers allocated to this argument. */
+ unsigned int num_fprs;
+
+ /* The offset of the first register used, provided num_fprs is nonzero. */
+ unsigned int fpr_offset;
+};
+
+/* Information about an address described by riscv_address_type.
+
+ ADDRESS_CONST_INT
+ No fields are used.
+
+ ADDRESS_REG
+ REG is the base register and OFFSET is the constant offset.
+
+ ADDRESS_LO_SUM
+ REG and OFFSET are the operands to the LO_SUM and SYMBOL_TYPE
+ is the type of symbol it references.
+
+ ADDRESS_SYMBOLIC
+ SYMBOL_TYPE is the type of symbol that the address references. */
+struct riscv_address_info {
+ enum riscv_address_type type;
+ rtx reg;
+ rtx offset;
+ enum riscv_symbol_type symbol_type;
+};
+
+/* One stage in a constant building sequence. These sequences have
+ the form:
+
+ A = VALUE[0]
+ A = A CODE[1] VALUE[1]
+ A = A CODE[2] VALUE[2]
+ ...
+
+ where A is an accumulator, each CODE[i] is a binary rtl operation
+ and each VALUE[i] is a constant integer. CODE[0] is undefined. */
+struct riscv_integer_op {
+ enum rtx_code code;
+ unsigned HOST_WIDE_INT value;
+};
+
+/* The largest number of operations needed to load an integer constant.
+ The worst case is LUI, ADDI, SLLI, ADDI, SLLI, ADDI, SLLI, ADDI. */
+#define RISCV_MAX_INTEGER_OPS 8
+
+/* Costs of various operations on the different architectures. */
+
+struct riscv_tune_info
+{
+ unsigned short fp_add[2];
+ unsigned short fp_mul[2];
+ unsigned short fp_div[2];
+ unsigned short int_mul[2];
+ unsigned short int_div[2];
+ unsigned short issue_rate;
+ unsigned short branch_cost;
+ unsigned short memory_cost;
+};
+
+/* Information about one CPU we know about. */
+struct riscv_cpu_info {
+ /* This CPU's canonical name. */
+ const char *name;
+
+ /* Tuning parameters for this CPU. */
+ const struct riscv_tune_info *tune_info;
+};
+
+/* Global variables for machine-dependent things. */
+
+/* Which tuning parameters to use. */
+static const struct riscv_tune_info *tune_info;
+
+/* Index R is the smallest register class that contains register R. */
+const enum reg_class riscv_regno_to_class[FIRST_PSEUDO_REGISTER] = {
+ GR_REGS, GR_REGS, GR_REGS, GR_REGS,
+ GR_REGS, GR_REGS, SIBCALL_REGS, SIBCALL_REGS,
+ JALR_REGS, JALR_REGS, JALR_REGS, JALR_REGS,
+ JALR_REGS, JALR_REGS, JALR_REGS, JALR_REGS,
+ JALR_REGS, JALR_REGS, JALR_REGS, JALR_REGS,
+ JALR_REGS, JALR_REGS, JALR_REGS, JALR_REGS,
+ JALR_REGS, JALR_REGS, JALR_REGS, JALR_REGS,
+ SIBCALL_REGS, SIBCALL_REGS, SIBCALL_REGS, SIBCALL_REGS,
+ FP_REGS, FP_REGS, FP_REGS, FP_REGS,
+ FP_REGS, FP_REGS, FP_REGS, FP_REGS,
+ FP_REGS, FP_REGS, FP_REGS, FP_REGS,
+ FP_REGS, FP_REGS, FP_REGS, FP_REGS,
+ FP_REGS, FP_REGS, FP_REGS, FP_REGS,
+ FP_REGS, FP_REGS, FP_REGS, FP_REGS,
+ FP_REGS, FP_REGS, FP_REGS, FP_REGS,
+ FP_REGS, FP_REGS, FP_REGS, FP_REGS,
+ FRAME_REGS, FRAME_REGS,
+};
+
+/* Costs to use when optimizing for rocket. */
+static const struct riscv_tune_info rocket_tune_info = {
+ {COSTS_N_INSNS (4), COSTS_N_INSNS (5)}, /* fp_add */
+ {COSTS_N_INSNS (4), COSTS_N_INSNS (5)}, /* fp_mul */
+ {COSTS_N_INSNS (20), COSTS_N_INSNS (20)}, /* fp_div */
+ {COSTS_N_INSNS (4), COSTS_N_INSNS (4)}, /* int_mul */
+ {COSTS_N_INSNS (6), COSTS_N_INSNS (6)}, /* int_div */
+ 1, /* issue_rate */
+ 3, /* branch_cost */
+ 5 /* memory_cost */
+};
+
+/* Costs to use when optimizing for size. */
+static const struct riscv_tune_info optimize_size_tune_info = {
+ {COSTS_N_INSNS (1), COSTS_N_INSNS (1)}, /* fp_add */
+ {COSTS_N_INSNS (1), COSTS_N_INSNS (1)}, /* fp_mul */
+ {COSTS_N_INSNS (1), COSTS_N_INSNS (1)}, /* fp_div */
+ {COSTS_N_INSNS (1), COSTS_N_INSNS (1)}, /* int_mul */
+ {COSTS_N_INSNS (1), COSTS_N_INSNS (1)}, /* int_div */
+ 1, /* issue_rate */
+ 1, /* branch_cost */
+ 2 /* memory_cost */
+};
+
+/* A table describing all the processors GCC knows about. */
+static const struct riscv_cpu_info riscv_cpu_info_table[] = {
+ { "rocket", &rocket_tune_info },
+};
+
+/* Return the riscv_cpu_info entry for the given name string. */
+
+static const struct riscv_cpu_info *
+riscv_parse_cpu (const char *cpu_string)
+{
+ for (unsigned i = 0; i < ARRAY_SIZE (riscv_cpu_info_table); i++)
+ if (strcmp (riscv_cpu_info_table[i].name, cpu_string) == 0)
+ return riscv_cpu_info_table + i;
+
+ error ("unknown cpu %qs for -mtune", cpu_string);
+ return riscv_cpu_info_table;
+}
+
+/* Helper function for riscv_build_integer; arguments are as for
+ riscv_build_integer. */
+
+static int
+riscv_build_integer_1 (struct riscv_integer_op codes[RISCV_MAX_INTEGER_OPS],
+ HOST_WIDE_INT value, enum machine_mode mode)
+{
+ HOST_WIDE_INT low_part = CONST_LOW_PART (value);
+ int cost = RISCV_MAX_INTEGER_OPS + 1, alt_cost;
+ struct riscv_integer_op alt_codes[RISCV_MAX_INTEGER_OPS];
+
+ if (SMALL_OPERAND (value) || LUI_OPERAND (value))
+ {
+ /* Simply ADDI or LUI. */
+ codes[0].code = UNKNOWN;
+ codes[0].value = value;
+ return 1;
+ }
+
+ /* End with ADDI. When constructing HImode constants, do not generate any
+ intermediate value that is not itself a valid HImode constant. The
+ XORI case below will handle those remaining HImode constants. */
+ if (low_part != 0
+ && (mode != HImode
+ || value - low_part <= ((1 << (GET_MODE_BITSIZE (HImode) - 1)) - 1)))
+ {
+ alt_cost = 1 + riscv_build_integer_1 (alt_codes, value - low_part, mode);
+ if (alt_cost < cost)
+ {
+ alt_codes[alt_cost-1].code = PLUS;
+ alt_codes[alt_cost-1].value = low_part;
+ memcpy (codes, alt_codes, sizeof (alt_codes));
+ cost = alt_cost;
+ }
+ }
+
+ /* End with XORI. */
+ if (cost > 2 && (low_part < 0 || mode == HImode))
+ {
+ alt_cost = 1 + riscv_build_integer_1 (alt_codes, value ^ low_part, mode);
+ if (alt_cost < cost)
+ {
+ alt_codes[alt_cost-1].code = XOR;
+ alt_codes[alt_cost-1].value = low_part;
+ memcpy (codes, alt_codes, sizeof (alt_codes));
+ cost = alt_cost;
+ }
+ }
+
+ /* Eliminate trailing zeros and end with SLLI. */
+ if (cost > 2 && (value & 1) == 0)
+ {
+ int shift = ctz_hwi (value);
+ unsigned HOST_WIDE_INT x = value;
+ x = sext_hwi (x >> shift, HOST_BITS_PER_WIDE_INT - shift);
+
+ /* Don't eliminate the lower 12 bits if LUI might apply. */
+ if (shift > IMM_BITS && !SMALL_OPERAND (x) && LUI_OPERAND (x << IMM_BITS))
+ shift -= IMM_BITS, x <<= IMM_BITS;
+
+ alt_cost = 1 + riscv_build_integer_1 (alt_codes, x, mode);
+ if (alt_cost < cost)
+ {
+ alt_codes[alt_cost-1].code = ASHIFT;
+ alt_codes[alt_cost-1].value = shift;
+ memcpy (codes, alt_codes, sizeof (alt_codes));
+ cost = alt_cost;
+ }
+ }
+
+ gcc_assert (cost <= RISCV_MAX_INTEGER_OPS);
+ return cost;
+}
+
+/* Fill CODES with a sequence of rtl operations to load VALUE.
+ Return the number of operations needed. */
+
+static int
+riscv_build_integer (struct riscv_integer_op *codes, HOST_WIDE_INT value,
+ enum machine_mode mode)
+{
+ int cost = riscv_build_integer_1 (codes, value, mode);
+
+ /* Eliminate leading zeros and end with SRLI. */
+ if (value > 0 && cost > 2)
+ {
+ struct riscv_integer_op alt_codes[RISCV_MAX_INTEGER_OPS];
+ int alt_cost, shift = clz_hwi (value);
+ HOST_WIDE_INT shifted_val;
+
+ /* Try filling trailing bits with 1s. */
+ shifted_val = (value << shift) | ((((HOST_WIDE_INT) 1) << shift) - 1);
+ alt_cost = 1 + riscv_build_integer_1 (alt_codes, shifted_val, mode);
+ if (alt_cost < cost)
+ {
+ alt_codes[alt_cost-1].code = LSHIFTRT;
+ alt_codes[alt_cost-1].value = shift;
+ memcpy (codes, alt_codes, sizeof (alt_codes));
+ cost = alt_cost;
+ }
+
+ /* Try filling trailing bits with 0s. */
+ shifted_val = value << shift;
+ alt_cost = 1 + riscv_build_integer_1 (alt_codes, shifted_val, mode);
+ if (alt_cost < cost)
+ {
+ alt_codes[alt_cost-1].code = LSHIFTRT;
+ alt_codes[alt_cost-1].value = shift;
+ memcpy (codes, alt_codes, sizeof (alt_codes));
+ cost = alt_cost;
+ }
+ }
+
+ return cost;
+}
+
+/* Return the cost of constructing VAL in the event that a scratch
+ register is available. */
+
+static int
+riscv_split_integer_cost (HOST_WIDE_INT val)
+{
+ int cost;
+ unsigned HOST_WIDE_INT loval = sext_hwi (val, 32);
+ unsigned HOST_WIDE_INT hival = sext_hwi ((val - loval) >> 32, 32);
+ struct riscv_integer_op codes[RISCV_MAX_INTEGER_OPS];
+
+ cost = 2 + riscv_build_integer (codes, loval, VOIDmode);
+ if (loval != hival)
+ cost += riscv_build_integer (codes, hival, VOIDmode);
+
+ return cost;
+}
+
+/* Return the cost of constructing the integer constant VAL. */
+
+static int
+riscv_integer_cost (HOST_WIDE_INT val)
+{
+ struct riscv_integer_op codes[RISCV_MAX_INTEGER_OPS];
+ return MIN (riscv_build_integer (codes, val, VOIDmode),
+ riscv_split_integer_cost (val));
+}
+
+/* Try to split a 64b integer into 32b parts, then reassemble. */
+
+static rtx
+riscv_split_integer (HOST_WIDE_INT val, enum machine_mode mode)
+{
+ unsigned HOST_WIDE_INT loval = sext_hwi (val, 32);
+ unsigned HOST_WIDE_INT hival = sext_hwi ((val - loval) >> 32, 32);
+ rtx hi = gen_reg_rtx (mode), lo = gen_reg_rtx (mode);
+
+ riscv_move_integer (hi, hi, hival);
+ riscv_move_integer (lo, lo, loval);
+
+ hi = gen_rtx_fmt_ee (ASHIFT, mode, hi, GEN_INT (32));
+ hi = force_reg (mode, hi);
+
+ return gen_rtx_fmt_ee (PLUS, mode, hi, lo);
+}
+
+/* Return true if X is a thread-local symbol. */
+
+static bool
+riscv_tls_symbol_p (const_rtx x)
+{
+ return SYMBOL_REF_P (x) && SYMBOL_REF_TLS_MODEL (x) != 0;
+}
+
+/* Return true if symbol X binds locally. */
+
+static bool
+riscv_symbol_binds_local_p (const_rtx x)
+{
+ if (SYMBOL_REF_P (x))
+ return (SYMBOL_REF_DECL (x)
+ ? targetm.binds_local_p (SYMBOL_REF_DECL (x))
+ : SYMBOL_REF_LOCAL_P (x));
+ else
+ return false;
+}
+
+/* Return the method that should be used to access SYMBOL_REF or
+ LABEL_REF X. */
+
+static enum riscv_symbol_type
+riscv_classify_symbol (const_rtx x)
+{
+ if (riscv_tls_symbol_p (x))
+ return SYMBOL_TLS;
+
+ if (GET_CODE (x) == SYMBOL_REF && flag_pic && !riscv_symbol_binds_local_p (x))
+ return SYMBOL_GOT_DISP;
+
+ return riscv_cmodel == CM_MEDLOW ? SYMBOL_ABSOLUTE : SYMBOL_PCREL;
+}
+
+/* Classify the base of symbolic expression X. */
+
+enum riscv_symbol_type
+riscv_classify_symbolic_expression (rtx x)
+{
+ rtx offset;
+
+ split_const (x, &x, &offset);
+ if (UNSPEC_ADDRESS_P (x))
+ return UNSPEC_ADDRESS_TYPE (x);
+
+ return riscv_classify_symbol (x);
+}
+
+/* Return true if X is a symbolic constant. If it is, store the type of
+ the symbol in *SYMBOL_TYPE. */
+
+bool
+riscv_symbolic_constant_p (rtx x, enum riscv_symbol_type *symbol_type)
+{
+ rtx offset;
+
+ split_const (x, &x, &offset);
+ if (UNSPEC_ADDRESS_P (x))
+ {
+ *symbol_type = UNSPEC_ADDRESS_TYPE (x);
+ x = UNSPEC_ADDRESS (x);
+ }
+ else if (GET_CODE (x) == SYMBOL_REF || GET_CODE (x) == LABEL_REF)
+ *symbol_type = riscv_classify_symbol (x);
+ else
+ return false;
+
+ if (offset == const0_rtx)
+ return true;
+
+ /* Nonzero offsets are only valid for references that don't use the GOT. */
+ switch (*symbol_type)
+ {
+ case SYMBOL_ABSOLUTE:
+ case SYMBOL_PCREL:
+ case SYMBOL_TLS_LE:
+ /* GAS rejects offsets outside the range [-2^31, 2^31-1]. */
+ return sext_hwi (INTVAL (offset), 32) == INTVAL (offset);
+
+ default:
+ return false;
+ }
+}
+
+/* Returns the number of instructions necessary to reference a symbol. */
+
+static int riscv_symbol_insns (enum riscv_symbol_type type)
+{
+ switch (type)
+ {
+ case SYMBOL_TLS: return 0; /* Depends on the TLS model. */
+ case SYMBOL_ABSOLUTE: return 2; /* LUI + the reference. */
+ case SYMBOL_PCREL: return 2; /* AUIPC + the reference. */
+ case SYMBOL_TLS_LE: return 3; /* LUI + ADD TP + the reference. */
+ case SYMBOL_GOT_DISP: return 3; /* AUIPC + LD GOT + the reference. */
+ default: gcc_unreachable ();
+ }
+}
+
+/* Implement TARGET_LEGITIMATE_CONSTANT_P. */
+
+static bool
+riscv_legitimate_constant_p (enum machine_mode mode ATTRIBUTE_UNUSED, rtx x)
+{
+ return riscv_const_insns (x) > 0;
+}
+
+/* Implement TARGET_CANNOT_FORCE_CONST_MEM. */
+
+static bool
+riscv_cannot_force_const_mem (enum machine_mode mode ATTRIBUTE_UNUSED, rtx x)
+{
+ enum riscv_symbol_type type;
+ rtx base, offset;
+
+ /* There is no assembler syntax for expressing an address-sized
+ high part. */
+ if (GET_CODE (x) == HIGH)
+ return true;
+
+ split_const (x, &base, &offset);
+ if (riscv_symbolic_constant_p (base, &type))
+ {
+ /* As an optimization, don't spill symbolic constants that are as
+ cheap to rematerialize as to access in the constant pool. */
+ if (SMALL_OPERAND (INTVAL (offset)) && riscv_symbol_insns (type) > 0)
+ return true;
+
+ /* As an optimization, avoid needlessly generate dynamic relocations. */
+ if (flag_pic)
+ return true;
+ }
+
+ /* TLS symbols must be computed by riscv_legitimize_move. */
+ if (tls_referenced_p (x))
+ return true;
+
+ return false;
+}
+
+/* Return true if register REGNO is a valid base register for mode MODE.
+ STRICT_P is true if REG_OK_STRICT is in effect. */
+
+int
+riscv_regno_mode_ok_for_base_p (int regno,
+ enum machine_mode mode ATTRIBUTE_UNUSED,
+ bool strict_p)
+{
+ if (!HARD_REGISTER_NUM_P (regno))
+ {
+ if (!strict_p)
+ return true;
+ regno = reg_renumber[regno];
+ }
+
+ /* These fake registers will be eliminated to either the stack or
+ hard frame pointer, both of which are usually valid base registers.
+ Reload deals with the cases where the eliminated form isn't valid. */
+ if (regno == ARG_POINTER_REGNUM || regno == FRAME_POINTER_REGNUM)
+ return true;
+
+ return GP_REG_P (regno);
+}
+
+/* Return true if X is a valid base register for mode MODE.
+ STRICT_P is true if REG_OK_STRICT is in effect. */
+
+static bool
+riscv_valid_base_register_p (rtx x, enum machine_mode mode, bool strict_p)
+{
+ if (!strict_p && GET_CODE (x) == SUBREG)
+ x = SUBREG_REG (x);
+
+ return (REG_P (x)
+ && riscv_regno_mode_ok_for_base_p (REGNO (x), mode, strict_p));
+}
+
+/* Return true if, for every base register BASE_REG, (plus BASE_REG X)
+ can address a value of mode MODE. */
+
+static bool
+riscv_valid_offset_p (rtx x, enum machine_mode mode)
+{
+ /* Check that X is a signed 12-bit number. */
+ if (!const_arith_operand (x, Pmode))
+ return false;
+
+ /* We may need to split multiword moves, so make sure that every word
+ is accessible. */
+ if (GET_MODE_SIZE (mode) > UNITS_PER_WORD
+ && !SMALL_OPERAND (INTVAL (x) + GET_MODE_SIZE (mode) - UNITS_PER_WORD))
+ return false;
+
+ return true;
+}
+
+/* Should a symbol of type SYMBOL_TYPE should be split in two? */
+
+bool
+riscv_split_symbol_type (enum riscv_symbol_type symbol_type)
+{
+ if (symbol_type == SYMBOL_TLS_LE)
+ return true;
+
+ if (!TARGET_EXPLICIT_RELOCS)
+ return false;
+
+ return symbol_type == SYMBOL_ABSOLUTE || symbol_type == SYMBOL_PCREL;
+}
+
+/* Return true if a LO_SUM can address a value of mode MODE when the
+ LO_SUM symbol has type SYM_TYPE. */
+
+static bool
+riscv_valid_lo_sum_p (enum riscv_symbol_type sym_type, enum machine_mode mode)
+{
+ /* Check that symbols of type SYMBOL_TYPE can be used to access values
+ of mode MODE. */
+ if (riscv_symbol_insns (sym_type) == 0)
+ return false;
+
+ /* Check that there is a known low-part relocation. */
+ if (!riscv_split_symbol_type (sym_type))
+ return false;
+
+ /* We may need to split multiword moves, so make sure that each word
+ can be accessed without inducing a carry. */
+ if (GET_MODE_SIZE (mode) > UNITS_PER_WORD
+ && GET_MODE_BITSIZE (mode) > GET_MODE_ALIGNMENT (mode))
+ return false;
+
+ return true;
+}
+
+/* Return true if X is a valid address for machine mode MODE. If it is,
+ fill in INFO appropriately. STRICT_P is true if REG_OK_STRICT is in
+ effect. */
+
+static bool
+riscv_classify_address (struct riscv_address_info *info, rtx x,
+ enum machine_mode mode, bool strict_p)
+{
+ switch (GET_CODE (x))
+ {
+ case REG:
+ case SUBREG:
+ info->type = ADDRESS_REG;
+ info->reg = x;
+ info->offset = const0_rtx;
+ return riscv_valid_base_register_p (info->reg, mode, strict_p);
+
+ case PLUS:
+ info->type = ADDRESS_REG;
+ info->reg = XEXP (x, 0);
+ info->offset = XEXP (x, 1);
+ return (riscv_valid_base_register_p (info->reg, mode, strict_p)
+ && riscv_valid_offset_p (info->offset, mode));
+
+ case LO_SUM:
+ info->type = ADDRESS_LO_SUM;
+ info->reg = XEXP (x, 0);
+ info->offset = XEXP (x, 1);
+ /* We have to trust the creator of the LO_SUM to do something vaguely
+ sane. Target-independent code that creates a LO_SUM should also
+ create and verify the matching HIGH. Target-independent code that
+ adds an offset to a LO_SUM must prove that the offset will not
+ induce a carry. Failure to do either of these things would be
+ a bug, and we are not required to check for it here. The RISC-V
+ backend itself should only create LO_SUMs for valid symbolic
+ constants, with the high part being either a HIGH or a copy
+ of _gp. */
+ info->symbol_type
+ = riscv_classify_symbolic_expression (info->offset);
+ return (riscv_valid_base_register_p (info->reg, mode, strict_p)
+ && riscv_valid_lo_sum_p (info->symbol_type, mode));
+
+ case CONST_INT:
+ /* Small-integer addresses don't occur very often, but they
+ are legitimate if x0 is a valid base register. */
+ info->type = ADDRESS_CONST_INT;
+ return SMALL_OPERAND (INTVAL (x));
+
+ default:
+ return false;
+ }
+}
+
+/* Implement TARGET_LEGITIMATE_ADDRESS_P. */
+
+static bool
+riscv_legitimate_address_p (enum machine_mode mode, rtx x, bool strict_p)
+{
+ struct riscv_address_info addr;
+
+ return riscv_classify_address (&addr, x, mode, strict_p);
+}
+
+/* Return the number of instructions needed to load or store a value
+ of mode MODE at address X. Return 0 if X isn't valid for MODE.
+ Assume that multiword moves may need to be split into word moves
+ if MIGHT_SPLIT_P, otherwise assume that a single load or store is
+ enough. */
+
+int
+riscv_address_insns (rtx x, enum machine_mode mode, bool might_split_p)
+{
+ struct riscv_address_info addr;
+ int n = 1;
+
+ if (!riscv_classify_address (&addr, x, mode, false))
+ return 0;
+
+ /* BLKmode is used for single unaligned loads and stores and should
+ not count as a multiword mode. */
+ if (mode != BLKmode && might_split_p)
+ n += (GET_MODE_SIZE (mode) + UNITS_PER_WORD - 1) / UNITS_PER_WORD;
+
+ if (addr.type == ADDRESS_LO_SUM)
+ n += riscv_symbol_insns (addr.symbol_type) - 1;
+
+ return n;
+}
+
+/* Return the number of instructions needed to load constant X.
+ Return 0 if X isn't a valid constant. */
+
+int
+riscv_const_insns (rtx x)
+{
+ enum riscv_symbol_type symbol_type;
+ rtx offset;
+
+ switch (GET_CODE (x))
+ {
+ case HIGH:
+ if (!riscv_symbolic_constant_p (XEXP (x, 0), &symbol_type)
+ || !riscv_split_symbol_type (symbol_type))
+ return 0;
+
+ /* This is simply an LUI. */
+ return 1;
+
+ case CONST_INT:
+ {
+ int cost = riscv_integer_cost (INTVAL (x));
+ /* Force complicated constants to memory. */
+ return cost < 4 ? cost : 0;
+ }
+
+ case CONST_DOUBLE:
+ case CONST_VECTOR:
+ /* We can use x0 to load floating-point zero. */
+ return x == CONST0_RTX (GET_MODE (x)) ? 1 : 0;
+
+ case CONST:
+ /* See if we can refer to X directly. */
+ if (riscv_symbolic_constant_p (x, &symbol_type))
+ return riscv_symbol_insns (symbol_type);
+
+ /* Otherwise try splitting the constant into a base and offset. */
+ split_const (x, &x, &offset);
+ if (offset != 0)
+ {
+ int n = riscv_const_insns (x);
+ if (n != 0)
+ return n + riscv_integer_cost (INTVAL (offset));
+ }
+ return 0;
+
+ case SYMBOL_REF:
+ case LABEL_REF:
+ return riscv_symbol_insns (riscv_classify_symbol (x));
+
+ default:
+ return 0;
+ }
+}
+
+/* X is a doubleword constant that can be handled by splitting it into
+ two words and loading each word separately. Return the number of
+ instructions required to do this. */
+
+int
+riscv_split_const_insns (rtx x)
+{
+ unsigned int low, high;
+
+ low = riscv_const_insns (riscv_subword (x, false));
+ high = riscv_const_insns (riscv_subword (x, true));
+ gcc_assert (low > 0 && high > 0);
+ return low + high;
+}
+
+/* Return the number of instructions needed to implement INSN,
+ given that it loads from or stores to MEM. */
+
+int
+riscv_load_store_insns (rtx mem, rtx_insn *insn)
+{
+ enum machine_mode mode;
+ bool might_split_p;
+ rtx set;
+
+ gcc_assert (MEM_P (mem));
+ mode = GET_MODE (mem);
+
+ /* Try to prove that INSN does not need to be split. */
+ might_split_p = true;
+ if (GET_MODE_BITSIZE (mode) <= 32)
+ might_split_p = false;
+ else if (GET_MODE_BITSIZE (mode) == 64)
+ {
+ set = single_set (insn);
+ if (set && !riscv_split_64bit_move_p (SET_DEST (set), SET_SRC (set)))
+ might_split_p = false;
+ }
+
+ return riscv_address_insns (XEXP (mem, 0), mode, might_split_p);
+}
+
+/* Emit a move from SRC to DEST. Assume that the move expanders can
+ handle all moves if !can_create_pseudo_p (). The distinction is
+ important because, unlike emit_move_insn, the move expanders know
+ how to force Pmode objects into the constant pool even when the
+ constant pool address is not itself legitimate. */
+
+rtx
+riscv_emit_move (rtx dest, rtx src)
+{
+ return (can_create_pseudo_p ()
+ ? emit_move_insn (dest, src)
+ : emit_move_insn_1 (dest, src));
+}
+
+/* Emit an instruction of the form (set TARGET SRC). */
+
+static rtx
+riscv_emit_set (rtx target, rtx src)
+{
+ emit_insn (gen_rtx_SET (target, src));
+ return target;
+}
+
+/* Emit an instruction of the form (set DEST (CODE X Y)). */
+
+static rtx
+riscv_emit_binary (enum rtx_code code, rtx dest, rtx x, rtx y)
+{
+ return riscv_emit_set (dest, gen_rtx_fmt_ee (code, GET_MODE (dest), x, y));
+}
+
+/* Compute (CODE X Y) and store the result in a new register
+ of mode MODE. Return that new register. */
+
+static rtx
+riscv_force_binary (enum machine_mode mode, enum rtx_code code, rtx x, rtx y)
+{
+ return riscv_emit_binary (code, gen_reg_rtx (mode), x, y);
+}
+
+/* Copy VALUE to a register and return that register. If new pseudos
+ are allowed, copy it into a new register, otherwise use DEST. */
+
+static rtx
+riscv_force_temporary (rtx dest, rtx value)
+{
+ if (can_create_pseudo_p ())
+ return force_reg (Pmode, value);
+ else
+ {
+ riscv_emit_move (dest, value);
+ return dest;
+ }
+}
+
+/* Wrap symbol or label BASE in an UNSPEC address of type SYMBOL_TYPE,
+ then add CONST_INT OFFSET to the result. */
+
+static rtx
+riscv_unspec_address_offset (rtx base, rtx offset,
+ enum riscv_symbol_type symbol_type)
+{
+ base = gen_rtx_UNSPEC (Pmode, gen_rtvec (1, base),
+ UNSPEC_ADDRESS_FIRST + symbol_type);
+ if (offset != const0_rtx)
+ base = gen_rtx_PLUS (Pmode, base, offset);
+ return gen_rtx_CONST (Pmode, base);
+}
+
+/* Return an UNSPEC address with underlying address ADDRESS and symbol
+ type SYMBOL_TYPE. */
+
+rtx
+riscv_unspec_address (rtx address, enum riscv_symbol_type symbol_type)
+{
+ rtx base, offset;
+
+ split_const (address, &base, &offset);
+ return riscv_unspec_address_offset (base, offset, symbol_type);
+}
+
+/* If OP is an UNSPEC address, return the address to which it refers,
+ otherwise return OP itself. */
+
+static rtx
+riscv_strip_unspec_address (rtx op)
+{
+ rtx base, offset;
+
+ split_const (op, &base, &offset);
+ if (UNSPEC_ADDRESS_P (base))
+ op = plus_constant (Pmode, UNSPEC_ADDRESS (base), INTVAL (offset));
+ return op;
+}
+
+/* If riscv_unspec_address (ADDR, SYMBOL_TYPE) is a 32-bit value, add the
+ high part to BASE and return the result. Just return BASE otherwise.
+ TEMP is as for riscv_force_temporary.
+
+ The returned expression can be used as the first operand to a LO_SUM. */
+
+static rtx
+riscv_unspec_offset_high (rtx temp, rtx addr, enum riscv_symbol_type symbol_type)
+{
+ addr = gen_rtx_HIGH (Pmode, riscv_unspec_address (addr, symbol_type));
+ return riscv_force_temporary (temp, addr);
+}
+
+/* Load an entry from the GOT for a TLS GD access. */
+
+static rtx riscv_got_load_tls_gd (rtx dest, rtx sym)
+{
+ if (Pmode == DImode)
+ return gen_got_load_tls_gddi (dest, sym);
+ else
+ return gen_got_load_tls_gdsi (dest, sym);
+}
+
+/* Load an entry from the GOT for a TLS IE access. */
+
+static rtx riscv_got_load_tls_ie (rtx dest, rtx sym)
+{
+ if (Pmode == DImode)
+ return gen_got_load_tls_iedi (dest, sym);
+ else
+ return gen_got_load_tls_iesi (dest, sym);
+}
+
+/* Add in the thread pointer for a TLS LE access. */
+
+static rtx riscv_tls_add_tp_le (rtx dest, rtx base, rtx sym)
+{
+ rtx tp = gen_rtx_REG (Pmode, THREAD_POINTER_REGNUM);
+ if (Pmode == DImode)
+ return gen_tls_add_tp_ledi (dest, base, tp, sym);
+ else
+ return gen_tls_add_tp_lesi (dest, base, tp, sym);
+}
+
+/* If MODE is MAX_MACHINE_MODE, ADDR appears as a move operand, otherwise
+ it appears in a MEM of that mode. Return true if ADDR is a legitimate
+ constant in that context and can be split into high and low parts.
+ If so, and if LOW_OUT is nonnull, emit the high part and store the
+ low part in *LOW_OUT. Leave *LOW_OUT unchanged otherwise.
+
+ TEMP is as for riscv_force_temporary and is used to load the high
+ part into a register.
+
+ When MODE is MAX_MACHINE_MODE, the low part is guaranteed to be
+ a legitimize SET_SRC for an .md pattern, otherwise the low part
+ is guaranteed to be a legitimate address for mode MODE. */
+
+bool
+riscv_split_symbol (rtx temp, rtx addr, enum machine_mode mode, rtx *low_out)
+{
+ enum riscv_symbol_type symbol_type;
+
+ if ((GET_CODE (addr) == HIGH && mode == MAX_MACHINE_MODE)
+ || !riscv_symbolic_constant_p (addr, &symbol_type)
+ || riscv_symbol_insns (symbol_type) == 0
+ || !riscv_split_symbol_type (symbol_type))
+ return false;
+
+ if (low_out)
+ switch (symbol_type)
+ {
+ case SYMBOL_ABSOLUTE:
+ {
+ rtx high = gen_rtx_HIGH (Pmode, copy_rtx (addr));
+ high = riscv_force_temporary (temp, high);
+ *low_out = gen_rtx_LO_SUM (Pmode, high, addr);
+ }
+ break;
+
+ case SYMBOL_PCREL:
+ {
+ static unsigned seqno;
+ char buf[32];
+ rtx label;
+
+ ssize_t bytes = snprintf (buf, sizeof (buf), ".LA%u", seqno);
+ gcc_assert ((size_t) bytes < sizeof (buf));
+
+ label = gen_rtx_SYMBOL_REF (Pmode, ggc_strdup (buf));
+ SYMBOL_REF_FLAGS (label) |= SYMBOL_FLAG_LOCAL;
+
+ if (temp == NULL)
+ temp = gen_reg_rtx (Pmode);
+
+ if (Pmode == DImode)
+ emit_insn (gen_auipcdi (temp, copy_rtx (addr), GEN_INT (seqno)));
+ else
+ emit_insn (gen_auipcsi (temp, copy_rtx (addr), GEN_INT (seqno)));
+
+ *low_out = gen_rtx_LO_SUM (Pmode, temp, label);
+
+ seqno++;
+ }
+ break;
+
+ default:
+ gcc_unreachable ();
+ }
+
+ return true;
+}
+
+/* Return a legitimate address for REG + OFFSET. TEMP is as for
+ riscv_force_temporary; it is only needed when OFFSET is not a
+ SMALL_OPERAND. */
+
+static rtx
+riscv_add_offset (rtx temp, rtx reg, HOST_WIDE_INT offset)
+{
+ if (!SMALL_OPERAND (offset))
+ {
+ rtx high;
+
+ /* Leave OFFSET as a 16-bit offset and put the excess in HIGH.
+ The addition inside the macro CONST_HIGH_PART may cause an
+ overflow, so we need to force a sign-extension check. */
+ high = gen_int_mode (CONST_HIGH_PART (offset), Pmode);
+ offset = CONST_LOW_PART (offset);
+ high = riscv_force_temporary (temp, high);
+ reg = riscv_force_temporary (temp, gen_rtx_PLUS (Pmode, high, reg));
+ }
+ return plus_constant (Pmode, reg, offset);
+}
+
+/* The __tls_get_attr symbol. */
+static GTY(()) rtx riscv_tls_symbol;
+
+/* Return an instruction sequence that calls __tls_get_addr. SYM is
+ the TLS symbol we are referencing and TYPE is the symbol type to use
+ (either global dynamic or local dynamic). RESULT is an RTX for the
+ return value location. */
+
+static rtx_insn *
+riscv_call_tls_get_addr (rtx sym, rtx result)
+{
+ rtx a0 = gen_rtx_REG (Pmode, GP_ARG_FIRST), func;
+ rtx_insn *insn;
+
+ if (!riscv_tls_symbol)
+ riscv_tls_symbol = init_one_libfunc ("__tls_get_addr");
+ func = gen_rtx_MEM (FUNCTION_MODE, riscv_tls_symbol);
+
+ start_sequence ();
+
+ emit_insn (riscv_got_load_tls_gd (a0, sym));
+ insn = emit_call_insn (gen_call_value (result, func, const0_rtx, NULL));
+ RTL_CONST_CALL_P (insn) = 1;
+ use_reg (&CALL_INSN_FUNCTION_USAGE (insn), a0);
+ insn = get_insns ();
+
+ end_sequence ();
+
+ return insn;
+}
+
+/* Generate the code to access LOC, a thread-local SYMBOL_REF, and return
+ its address. The return value will be both a valid address and a valid
+ SET_SRC (either a REG or a LO_SUM). */
+
+static rtx
+riscv_legitimize_tls_address (rtx loc)
+{
+ rtx dest, tp, tmp;
+ enum tls_model model = SYMBOL_REF_TLS_MODEL (loc);
+
+ /* Since we support TLS copy relocs, non-PIC TLS accesses may all use LE. */
+ if (!flag_pic)
+ model = TLS_MODEL_LOCAL_EXEC;
+
+ switch (model)
+ {
+ case TLS_MODEL_LOCAL_DYNAMIC:
+ /* Rely on section anchors for the optimization that LDM TLS
+ provides. The anchor's address is loaded with GD TLS. */
+ case TLS_MODEL_GLOBAL_DYNAMIC:
+ tmp = gen_rtx_REG (Pmode, GP_RETURN);
+ dest = gen_reg_rtx (Pmode);
+ emit_libcall_block (riscv_call_tls_get_addr (loc, tmp), dest, tmp, loc);
+ break;
+
+ case TLS_MODEL_INITIAL_EXEC:
+ /* la.tls.ie; tp-relative add */
+ tp = gen_rtx_REG (Pmode, THREAD_POINTER_REGNUM);
+ tmp = gen_reg_rtx (Pmode);
+ emit_insn (riscv_got_load_tls_ie (tmp, loc));
+ dest = gen_reg_rtx (Pmode);
+ emit_insn (gen_add3_insn (dest, tmp, tp));
+ break;
+
+ case TLS_MODEL_LOCAL_EXEC:
+ tmp = riscv_unspec_offset_high (NULL, loc, SYMBOL_TLS_LE);
+ dest = gen_reg_rtx (Pmode);
+ emit_insn (riscv_tls_add_tp_le (dest, tmp, loc));
+ dest = gen_rtx_LO_SUM (Pmode, dest,
+ riscv_unspec_address (loc, SYMBOL_TLS_LE));
+ break;
+
+ default:
+ gcc_unreachable ();
+ }
+ return dest;
+}
+
+/* If X is not a valid address for mode MODE, force it into a register. */
+
+static rtx
+riscv_force_address (rtx x, enum machine_mode mode)
+{
+ if (!riscv_legitimate_address_p (mode, x, false))
+ x = force_reg (Pmode, x);
+ return x;
+}
+
+/* This function is used to implement LEGITIMIZE_ADDRESS. If X can
+ be legitimized in a way that the generic machinery might not expect,
+ return a new address, otherwise return NULL. MODE is the mode of
+ the memory being accessed. */
+
+static rtx
+riscv_legitimize_address (rtx x, rtx oldx ATTRIBUTE_UNUSED,
+ enum machine_mode mode)
+{
+ rtx addr;
+
+ if (riscv_tls_symbol_p (x))
+ return riscv_legitimize_tls_address (x);
+
+ /* See if the address can split into a high part and a LO_SUM. */
+ if (riscv_split_symbol (NULL, x, mode, &addr))
+ return riscv_force_address (addr, mode);
+
+ /* Handle BASE + OFFSET using riscv_add_offset. */
+ if (GET_CODE (x) == PLUS && CONST_INT_P (XEXP (x, 1))
+ && INTVAL (XEXP (x, 1)) != 0)
+ {
+ rtx base = XEXP (x, 0);
+ HOST_WIDE_INT offset = INTVAL (XEXP (x, 1));
+
+ if (!riscv_valid_base_register_p (base, mode, false))
+ base = copy_to_mode_reg (Pmode, base);
+ addr = riscv_add_offset (NULL, base, offset);
+ return riscv_force_address (addr, mode);
+ }
+
+ return x;
+}
+
+/* Load VALUE into DEST. TEMP is as for riscv_force_temporary. */
+
+void
+riscv_move_integer (rtx temp, rtx dest, HOST_WIDE_INT value)
+{
+ struct riscv_integer_op codes[RISCV_MAX_INTEGER_OPS];
+ enum machine_mode mode;
+ int i, num_ops;
+ rtx x;
+
+ mode = GET_MODE (dest);
+ num_ops = riscv_build_integer (codes, value, mode);
+
+ if (can_create_pseudo_p () && num_ops > 2 /* not a simple constant */
+ && num_ops >= riscv_split_integer_cost (value))
+ x = riscv_split_integer (value, mode);
+ else
+ {
+ /* Apply each binary operation to X. */
+ x = GEN_INT (codes[0].value);
+
+ for (i = 1; i < num_ops; i++)
+ {
+ if (!can_create_pseudo_p ())
+ x = riscv_emit_set (temp, x);
+ else
+ x = force_reg (mode, x);
+
+ x = gen_rtx_fmt_ee (codes[i].code, mode, x, GEN_INT (codes[i].value));
+ }
+ }
+
+ riscv_emit_set (dest, x);
+}
+
+/* Subroutine of riscv_legitimize_move. Move constant SRC into register
+ DEST given that SRC satisfies immediate_operand but doesn't satisfy
+ move_operand. */
+
+static void
+riscv_legitimize_const_move (enum machine_mode mode, rtx dest, rtx src)
+{
+ rtx base, offset;
+
+ /* Split moves of big integers into smaller pieces. */
+ if (splittable_const_int_operand (src, mode))
+ {
+ riscv_move_integer (dest, dest, INTVAL (src));
+ return;
+ }
+
+ /* Split moves of symbolic constants into high/low pairs. */
+ if (riscv_split_symbol (dest, src, MAX_MACHINE_MODE, &src))
+ {
+ riscv_emit_set (dest, src);
+ return;
+ }
+
+ /* Generate the appropriate access sequences for TLS symbols. */
+ if (riscv_tls_symbol_p (src))
+ {
+ riscv_emit_move (dest, riscv_legitimize_tls_address (src));
+ return;
+ }
+
+ /* If we have (const (plus symbol offset)), and that expression cannot
+ be forced into memory, load the symbol first and add in the offset. Also
+ prefer to do this even if the constant _can_ be forced into memory, as it
+ usually produces better code. */
+ split_const (src, &base, &offset);
+ if (offset != const0_rtx
+ && (targetm.cannot_force_const_mem (mode, src) || can_create_pseudo_p ()))
+ {
+ base = riscv_force_temporary (dest, base);
+ riscv_emit_move (dest, riscv_add_offset (NULL, base, INTVAL (offset)));
+ return;
+ }
+
+ src = force_const_mem (mode, src);
+
+ /* When using explicit relocs, constant pool references are sometimes
+ not legitimate addresses. */
+ riscv_split_symbol (dest, XEXP (src, 0), mode, &XEXP (src, 0));
+ riscv_emit_move (dest, src);
+}
+
+/* If (set DEST SRC) is not a valid move instruction, emit an equivalent
+ sequence that is valid. */
+
+bool
+riscv_legitimize_move (enum machine_mode mode, rtx dest, rtx src)
+{
+ if (!register_operand (dest, mode) && !reg_or_0_operand (src, mode))
+ {
+ riscv_emit_move (dest, force_reg (mode, src));
+ return true;
+ }
+
+ /* We need to deal with constants that would be legitimate
+ immediate_operands but aren't legitimate move_operands. */
+ if (CONSTANT_P (src) && !move_operand (src, mode))
+ {
+ riscv_legitimize_const_move (mode, dest, src);
+ set_unique_reg_note (get_last_insn (), REG_EQUAL, copy_rtx (src));
+ return true;
+ }
+
+ return false;
+}
+
+/* Return true if there is an instruction that implements CODE and accepts
+ X as an immediate operand. */
+
+static int
+riscv_immediate_operand_p (int code, HOST_WIDE_INT x)
+{
+ switch (code)
+ {
+ case ASHIFT:
+ case ASHIFTRT:
+ case LSHIFTRT:
+ /* All shift counts are truncated to a valid constant. */
+ return true;
+
+ case AND:
+ case IOR:
+ case XOR:
+ case PLUS:
+ case LT:
+ case LTU:
+ /* These instructions take 12-bit signed immediates. */
+ return SMALL_OPERAND (x);
+
+ case LE:
+ /* We add 1 to the immediate and use SLT. */
+ return SMALL_OPERAND (x + 1);
+
+ case LEU:
+ /* Likewise SLTU, but reject the always-true case. */
+ return SMALL_OPERAND (x + 1) && x + 1 != 0;
+
+ case GE:
+ case GEU:
+ /* We can emulate an immediate of 1 by using GT/GTU against x0. */
+ return x == 1;
+
+ default:
+ /* By default assume that x0 can be used for 0. */
+ return x == 0;
+ }
+}
+
+/* Return the cost of binary operation X, given that the instruction
+ sequence for a word-sized or smaller operation takes SIGNLE_INSNS
+ instructions and that the sequence of a double-word operation takes
+ DOUBLE_INSNS instructions. */
+
+static int
+riscv_binary_cost (rtx x, int single_insns, int double_insns)
+{
+ if (GET_MODE_SIZE (GET_MODE (x)) == UNITS_PER_WORD * 2)
+ return COSTS_N_INSNS (double_insns);
+ return COSTS_N_INSNS (single_insns);
+}
+
+/* Return the cost of sign- or zero-extending OP. */
+
+static int
+riscv_extend_cost (rtx op, bool unsigned_p)
+{
+ if (MEM_P (op))
+ return 0;
+
+ if (unsigned_p && GET_MODE (op) == QImode)
+ /* We can use ANDI. */
+ return COSTS_N_INSNS (1);
+
+ if (!unsigned_p && GET_MODE (op) == SImode)
+ /* We can use SEXT.W. */
+ return COSTS_N_INSNS (1);
+
+ /* We need to use a shift left and a shift right. */
+ return COSTS_N_INSNS (2);
+}
+
+/* Implement TARGET_RTX_COSTS. */
+
+static bool
+riscv_rtx_costs (rtx x, machine_mode mode, int outer_code, int opno ATTRIBUTE_UNUSED,
+ int *total, bool speed)
+{
+ bool float_mode_p = FLOAT_MODE_P (mode);
+ int cost;
+
+ switch (GET_CODE (x))
+ {
+ case CONST_INT:
+ if (riscv_immediate_operand_p (outer_code, INTVAL (x)))
+ {
+ *total = 0;
+ return true;
+ }
+ /* Fall through. */
+
+ case SYMBOL_REF:
+ case LABEL_REF:
+ case CONST_DOUBLE:
+ case CONST:
+ if ((cost = riscv_const_insns (x)) > 0)
+ {
+ /* If the constant is likely to be stored in a GPR, SETs of
+ single-insn constants are as cheap as register sets; we
+ never want to CSE them. */
+ if (cost == 1 && outer_code == SET)
+ *total = 0;
+ /* When we load a constant more than once, it usually is better
+ to duplicate the last operation in the sequence than to CSE
+ the constant itself. */
+ else if (outer_code == SET || GET_MODE (x) == VOIDmode)
+ *total = COSTS_N_INSNS (1);
+ }
+ else /* The instruction will be fetched from the constant pool. */
+ *total = COSTS_N_INSNS (riscv_symbol_insns (SYMBOL_ABSOLUTE));
+ return true;
+
+ case MEM:
+ /* If the address is legitimate, return the number of
+ instructions it needs. */
+ if ((cost = riscv_address_insns (XEXP (x, 0), mode, true)) > 0)
+ {
+ *total = COSTS_N_INSNS (cost + tune_info->memory_cost);
+ return true;
+ }
+ /* Otherwise use the default handling. */
+ return false;
+
+ case NOT:
+ *total = COSTS_N_INSNS (GET_MODE_SIZE (mode) > UNITS_PER_WORD ? 2 : 1);
+ return false;
+
+ case AND:
+ case IOR:
+ case XOR:
+ /* Double-word operations use two single-word operations. */
+ *total = riscv_binary_cost (x, 1, 2);
+ return false;
+
+ case ASHIFT:
+ case ASHIFTRT:
+ case LSHIFTRT:
+ *total = riscv_binary_cost (x, 1, CONSTANT_P (XEXP (x, 1)) ? 4 : 9);
+ return false;
+
+ case ABS:
+ *total = COSTS_N_INSNS (float_mode_p ? 1 : 3);
+ return false;
+
+ case LO_SUM:
+ *total = set_src_cost (XEXP (x, 0), mode, speed);
+ return true;
+
+ case LT:
+ case LTU:
+ case LE:
+ case LEU:
+ case GT:
+ case GTU:
+ case GE:
+ case GEU:
+ case EQ:
+ case NE:
+ /* Branch comparisons have VOIDmode, so use the first operand's
+ mode instead. */
+ mode = GET_MODE (XEXP (x, 0));
+ if (float_mode_p)
+ *total = tune_info->fp_add[mode == DFmode];
+ else
+ *total = riscv_binary_cost (x, 1, 3);
+ return false;
+
+ case UNORDERED:
+ case ORDERED:
+ /* (FEQ(A, A) & FEQ(B, B)) compared against 0. */
+ mode = GET_MODE (XEXP (x, 0));
+ *total = tune_info->fp_add[mode == DFmode] + COSTS_N_INSNS (2);
+ return false;
+
+ case UNEQ:
+ case LTGT:
+ /* (FEQ(A, A) & FEQ(B, B)) compared against FEQ(A, B). */
+ mode = GET_MODE (XEXP (x, 0));
+ *total = tune_info->fp_add[mode == DFmode] + COSTS_N_INSNS (3);
+ return false;
+
+ case UNGE:
+ case UNGT:
+ case UNLE:
+ case UNLT:
+ /* FLT or FLE, but guarded by an FFLAGS read and write. */
+ mode = GET_MODE (XEXP (x, 0));
+ *total = tune_info->fp_add[mode == DFmode] + COSTS_N_INSNS (4);
+ return false;
+
+ case MINUS:
+ case PLUS:
+ if (float_mode_p)
+ *total = tune_info->fp_add[mode == DFmode];
+ else
+ *total = riscv_binary_cost (x, 1, 4);
+ return false;
+
+ case NEG:
+ {
+ rtx op = XEXP (x, 0);
+ if (GET_CODE (op) == FMA && !HONOR_SIGNED_ZEROS (mode))
+ {
+ *total = (tune_info->fp_mul[mode == DFmode]
+ + set_src_cost (XEXP (op, 0), mode, speed)
+ + set_src_cost (XEXP (op, 1), mode, speed)
+ + set_src_cost (XEXP (op, 2), mode, speed));
+ return true;
+ }
+ }
+
+ if (float_mode_p)
+ *total = tune_info->fp_add[mode == DFmode];
+ else
+ *total = COSTS_N_INSNS (GET_MODE_SIZE (mode) > UNITS_PER_WORD ? 4 : 1);
+ return false;
+
+ case MULT:
+ if (float_mode_p)
+ *total = tune_info->fp_mul[mode == DFmode];
+ else if (GET_MODE_SIZE (mode) > UNITS_PER_WORD)
+ *total = 3 * tune_info->int_mul[0] + COSTS_N_INSNS (2);
+ else if (!speed)
+ *total = COSTS_N_INSNS (1);
+ else
+ *total = tune_info->int_mul[mode == DImode];
+ return false;
+
+ case DIV:
+ case SQRT:
+ case MOD:
+ if (float_mode_p)
+ {
+ *total = tune_info->fp_div[mode == DFmode];
+ return false;
+ }
+ /* Fall through. */
+
+ case UDIV:
+ case UMOD:
+ if (speed)
+ *total = tune_info->int_div[mode == DImode];
+ else
+ *total = COSTS_N_INSNS (1);
+ return false;
+
+ case SIGN_EXTEND:
+ case ZERO_EXTEND:
+ *total = riscv_extend_cost (XEXP (x, 0), GET_CODE (x) == ZERO_EXTEND);
+ return false;
+
+ case FLOAT:
+ case UNSIGNED_FLOAT:
+ case FIX:
+ case FLOAT_EXTEND:
+ case FLOAT_TRUNCATE:
+ *total = tune_info->fp_add[mode == DFmode];
+ return false;
+
+ case FMA:
+ *total = (tune_info->fp_mul[mode == DFmode]
+ + set_src_cost (XEXP (x, 0), mode, speed)
+ + set_src_cost (XEXP (x, 1), mode, speed)
+ + set_src_cost (XEXP (x, 2), mode, speed));
+ return true;
+
+ case UNSPEC:
+ if (XINT (x, 1) == UNSPEC_AUIPC)
+ {
+ /* Make AUIPC cheap to avoid spilling its result to the stack. */
+ *total = 1;
+ return true;
+ }
+ return false;
+
+ default:
+ return false;
+ }
+}
+
+/* Implement TARGET_ADDRESS_COST. */
+
+static int
+riscv_address_cost (rtx addr, enum machine_mode mode,
+ addr_space_t as ATTRIBUTE_UNUSED,
+ bool speed ATTRIBUTE_UNUSED)
+{
+ return riscv_address_insns (addr, mode, false);
+}
+
+/* Return one word of double-word value OP. HIGH_P is true to select the
+ high part or false to select the low part. */
+
+rtx
+riscv_subword (rtx op, bool high_p)
+{
+ unsigned int byte = high_p ? UNITS_PER_WORD : 0;
+ enum machine_mode mode = GET_MODE (op);
+
+ if (mode == VOIDmode)
+ mode = TARGET_64BIT ? TImode : DImode;
+
+ if (MEM_P (op))
+ return adjust_address (op, word_mode, byte);
+
+ if (REG_P (op))
+ gcc_assert (!FP_REG_RTX_P (op));
+
+ return simplify_gen_subreg (word_mode, op, mode, byte);
+}
+
+/* Return true if a 64-bit move from SRC to DEST should be split into two. */
+
+bool
+riscv_split_64bit_move_p (rtx dest, rtx src)
+{
+ if (TARGET_64BIT)
+ return false;
+
+ /* Allow FPR <-> FPR and FPR <-> MEM moves, and permit the special case
+ of zeroing an FPR with FCVT.D.W. */
+ if (TARGET_DOUBLE_FLOAT
+ && ((FP_REG_RTX_P (src) && FP_REG_RTX_P (dest))
+ || (FP_REG_RTX_P (dest) && MEM_P (src))
+ || (FP_REG_RTX_P (src) && MEM_P (dest))
+ || (FP_REG_RTX_P (dest) && src == CONST0_RTX (GET_MODE (src)))))
+ return false;
+
+ return true;
+}
+
+/* Split a doubleword move from SRC to DEST. On 32-bit targets,
+ this function handles 64-bit moves for which riscv_split_64bit_move_p
+ holds. For 64-bit targets, this function handles 128-bit moves. */
+
+void
+riscv_split_doubleword_move (rtx dest, rtx src)
+{
+ rtx low_dest;
+
+ /* The operation can be split into two normal moves. Decide in
+ which order to do them. */
+ low_dest = riscv_subword (dest, false);
+ if (REG_P (low_dest) && reg_overlap_mentioned_p (low_dest, src))
+ {
+ riscv_emit_move (riscv_subword (dest, true), riscv_subword (src, true));
+ riscv_emit_move (low_dest, riscv_subword (src, false));
+ }
+ else
+ {
+ riscv_emit_move (low_dest, riscv_subword (src, false));
+ riscv_emit_move (riscv_subword (dest, true), riscv_subword (src, true));
+ }
+}
+
+/* Return the appropriate instructions to move SRC into DEST. Assume
+ that SRC is operand 1 and DEST is operand 0. */
+
+const char *
+riscv_output_move (rtx dest, rtx src)
+{
+ enum rtx_code dest_code, src_code;
+ enum machine_mode mode;
+ bool dbl_p;
+
+ dest_code = GET_CODE (dest);
+ src_code = GET_CODE (src);
+ mode = GET_MODE (dest);
+ dbl_p = (GET_MODE_SIZE (mode) == 8);
+
+ if (dbl_p && riscv_split_64bit_move_p (dest, src))
+ return "#";
+
+ if (dest_code == REG && GP_REG_P (REGNO (dest)))
+ {
+ if (src_code == REG && FP_REG_P (REGNO (src)))
+ return dbl_p ? "fmv.x.d\t%0,%1" : "fmv.x.s\t%0,%1";
+
+ if (src_code == MEM)
+ switch (GET_MODE_SIZE (mode))
+ {
+ case 1: return "lbu\t%0,%1";
+ case 2: return "lhu\t%0,%1";
+ case 4: return "lw\t%0,%1";
+ case 8: return "ld\t%0,%1";
+ }
+
+ if (src_code == CONST_INT)
+ return "li\t%0,%1";
+
+ if (src_code == HIGH)
+ return "lui\t%0,%h1";
+
+ if (symbolic_operand (src, VOIDmode))
+ switch (riscv_classify_symbolic_expression (src))
+ {
+ case SYMBOL_GOT_DISP: return "la\t%0,%1";
+ case SYMBOL_ABSOLUTE: return "lla\t%0,%1";
+ case SYMBOL_PCREL: return "lla\t%0,%1";
+ default: gcc_unreachable ();
+ }
+ }
+ if ((src_code == REG && GP_REG_P (REGNO (src)))
+ || (src == CONST0_RTX (mode)))
+ {
+ if (dest_code == REG)
+ {
+ if (GP_REG_P (REGNO (dest)))
+ return "mv\t%0,%z1";
+
+ if (FP_REG_P (REGNO (dest)))
+ {
+ if (!dbl_p)
+ return "fmv.s.x\t%0,%z1";
+ if (TARGET_64BIT)
+ return "fmv.d.x\t%0,%z1";
+ /* in RV32, we can emulate fmv.d.x %0, x0 using fcvt.d.w */
+ gcc_assert (src == CONST0_RTX (mode));
+ return "fcvt.d.w\t%0,x0";
+ }
+ }
+ if (dest_code == MEM)
+ switch (GET_MODE_SIZE (mode))
+ {
+ case 1: return "sb\t%z1,%0";
+ case 2: return "sh\t%z1,%0";
+ case 4: return "sw\t%z1,%0";
+ case 8: return "sd\t%z1,%0";
+ }
+ }
+ if (src_code == REG && FP_REG_P (REGNO (src)))
+ {
+ if (dest_code == REG && FP_REG_P (REGNO (dest)))
+ return dbl_p ? "fmv.d\t%0,%1" : "fmv.s\t%0,%1";
+
+ if (dest_code == MEM)
+ return dbl_p ? "fsd\t%1,%0" : "fsw\t%1,%0";
+ }
+ if (dest_code == REG && FP_REG_P (REGNO (dest)))
+ {
+ if (src_code == MEM)
+ return dbl_p ? "fld\t%0,%1" : "flw\t%0,%1";
+ }
+ gcc_unreachable ();
+}
+
+/* Return true if CMP1 is a suitable second operand for integer ordering
+ test CODE. See also the *sCC patterns in riscv.md. */
+
+static bool
+riscv_int_order_operand_ok_p (enum rtx_code code, rtx cmp1)
+{
+ switch (code)
+ {
+ case GT:
+ case GTU:
+ return reg_or_0_operand (cmp1, VOIDmode);
+
+ case GE:
+ case GEU:
+ return cmp1 == const1_rtx;
+
+ case LT:
+ case LTU:
+ return arith_operand (cmp1, VOIDmode);
+
+ case LE:
+ return sle_operand (cmp1, VOIDmode);
+
+ case LEU:
+ return sleu_operand (cmp1, VOIDmode);
+
+ default:
+ gcc_unreachable ();
+ }
+}
+
+/* Return true if *CMP1 (of mode MODE) is a valid second operand for
+ integer ordering test *CODE, or if an equivalent combination can
+ be formed by adjusting *CODE and *CMP1. When returning true, update
+ *CODE and *CMP1 with the chosen code and operand, otherwise leave
+ them alone. */
+
+static bool
+riscv_canonicalize_int_order_test (enum rtx_code *code, rtx *cmp1,
+ enum machine_mode mode)
+{
+ HOST_WIDE_INT plus_one;
+
+ if (riscv_int_order_operand_ok_p (*code, *cmp1))
+ return true;
+
+ if (CONST_INT_P (*cmp1))
+ switch (*code)
+ {
+ case LE:
+ plus_one = trunc_int_for_mode (UINTVAL (*cmp1) + 1, mode);
+ if (INTVAL (*cmp1) < plus_one)
+ {
+ *code = LT;
+ *cmp1 = force_reg (mode, GEN_INT (plus_one));
+ return true;
+ }
+ break;
+
+ case LEU:
+ plus_one = trunc_int_for_mode (UINTVAL (*cmp1) + 1, mode);
+ if (plus_one != 0)
+ {
+ *code = LTU;
+ *cmp1 = force_reg (mode, GEN_INT (plus_one));
+ return true;
+ }
+ break;
+
+ default:
+ break;
+ }
+ return false;
+}
+
+/* Compare CMP0 and CMP1 using ordering test CODE and store the result
+ in TARGET. CMP0 and TARGET are register_operands. If INVERT_PTR
+ is nonnull, it's OK to set TARGET to the inverse of the result and
+ flip *INVERT_PTR instead. */
+
+static void
+riscv_emit_int_order_test (enum rtx_code code, bool *invert_ptr,
+ rtx target, rtx cmp0, rtx cmp1)
+{
+ enum machine_mode mode;
+
+ /* First see if there is a RISCV instruction that can do this operation.
+ If not, try doing the same for the inverse operation. If that also
+ fails, force CMP1 into a register and try again. */
+ mode = GET_MODE (cmp0);
+ if (riscv_canonicalize_int_order_test (&code, &cmp1, mode))
+ riscv_emit_binary (code, target, cmp0, cmp1);
+ else
+ {
+ enum rtx_code inv_code = reverse_condition (code);
+ if (!riscv_canonicalize_int_order_test (&inv_code, &cmp1, mode))
+ {
+ cmp1 = force_reg (mode, cmp1);
+ riscv_emit_int_order_test (code, invert_ptr, target, cmp0, cmp1);
+ }
+ else if (invert_ptr == 0)
+ {
+ rtx inv_target = riscv_force_binary (GET_MODE (target),
+ inv_code, cmp0, cmp1);
+ riscv_emit_binary (XOR, target, inv_target, const1_rtx);
+ }
+ else
+ {
+ *invert_ptr = !*invert_ptr;
+ riscv_emit_binary (inv_code, target, cmp0, cmp1);
+ }
+ }
+}
+
+/* Return a register that is zero iff CMP0 and CMP1 are equal.
+ The register will have the same mode as CMP0. */
+
+static rtx
+riscv_zero_if_equal (rtx cmp0, rtx cmp1)
+{
+ if (cmp1 == const0_rtx)
+ return cmp0;
+
+ return expand_binop (GET_MODE (cmp0), sub_optab,
+ cmp0, cmp1, 0, 0, OPTAB_DIRECT);
+}
+
+/* Sign- or zero-extend OP0 and OP1 for integer comparisons. */
+
+static void
+riscv_extend_comparands (rtx_code code, rtx *op0, rtx *op1)
+{
+ /* Comparisons consider all XLEN bits, so extend sub-XLEN values. */
+ if (GET_MODE_SIZE (word_mode) > GET_MODE_SIZE (GET_MODE (*op0)))
+ {
+ /* It is more profitable to zero-extend QImode values. */
+ if (unsigned_condition (code) == code && GET_MODE (*op0) == QImode)
+ {
+ *op0 = gen_rtx_ZERO_EXTEND (word_mode, *op0);
+ if (CONST_INT_P (*op1))
+ *op1 = GEN_INT ((uint8_t) INTVAL (*op1));
+ else
+ *op1 = gen_rtx_ZERO_EXTEND (word_mode, *op1);
+ }
+ else
+ {
+ *op0 = gen_rtx_SIGN_EXTEND (word_mode, *op0);
+ if (*op1 != const0_rtx)
+ *op1 = gen_rtx_SIGN_EXTEND (word_mode, *op1);
+ }
+ }
+}
+
+/* Convert a comparison into something that can be used in a branch. On
+ entry, *OP0 and *OP1 are the values being compared and *CODE is the code
+ used to compare them. Update them to describe the final comparison. */
+
+static void
+riscv_emit_int_compare (enum rtx_code *code, rtx *op0, rtx *op1)
+{
+ if (splittable_const_int_operand (*op1, VOIDmode))
+ {
+ HOST_WIDE_INT rhs = INTVAL (*op1);
+
+ if (*code == EQ || *code == NE)
+ {
+ /* Convert e.g. OP0 == 2048 into OP0 - 2048 == 0. */
+ if (SMALL_OPERAND (-rhs))
+ {
+ *op0 = riscv_force_binary (GET_MODE (*op0), PLUS, *op0,
+ GEN_INT (-rhs));
+ *op1 = const0_rtx;
+ }
+ }
+ else
+ {
+ static const enum rtx_code mag_comparisons[][2] = {
+ {LEU, LTU}, {GTU, GEU}, {LE, LT}, {GT, GE}
+ };
+
+ /* Convert e.g. (OP0 <= 0xFFF) into (OP0 < 0x1000). */
+ for (size_t i = 0; i < ARRAY_SIZE (mag_comparisons); i++)
+ {
+ HOST_WIDE_INT new_rhs;
+ bool increment = *code == mag_comparisons[i][0];
+ bool decrement = *code == mag_comparisons[i][1];
+ if (!increment && !decrement)
+ continue;
+
+ new_rhs = rhs + (increment ? 1 : -1);
+ if (riscv_integer_cost (new_rhs) < riscv_integer_cost (rhs)
+ && (rhs < 0) == (new_rhs < 0))
+ {
+ *op1 = GEN_INT (new_rhs);
+ *code = mag_comparisons[i][increment];
+ }
+ break;
+ }
+ }
+ }
+
+ riscv_extend_comparands (*code, op0, op1);
+
+ *op0 = force_reg (word_mode, *op0);
+ if (*op1 != const0_rtx)
+ *op1 = force_reg (word_mode, *op1);
+}
+
+/* Like riscv_emit_int_compare, but for floating-point comparisons. */
+
+static void
+riscv_emit_float_compare (enum rtx_code *code, rtx *op0, rtx *op1)
+{
+ rtx tmp0, tmp1, cmp_op0 = *op0, cmp_op1 = *op1;
+ enum rtx_code fp_code = *code;
+ *code = NE;
+
+ switch (fp_code)
+ {
+ case UNORDERED:
+ *code = EQ;
+ /* Fall through. */
+
+ case ORDERED:
+ /* a == a && b == b */
+ tmp0 = riscv_force_binary (word_mode, EQ, cmp_op0, cmp_op0);
+ tmp1 = riscv_force_binary (word_mode, EQ, cmp_op1, cmp_op1);
+ *op0 = riscv_force_binary (word_mode, AND, tmp0, tmp1);
+ *op1 = const0_rtx;
+ break;
+
+ case UNEQ:
+ case LTGT:
+ /* ordered(a, b) > (a == b) */
+ *code = fp_code == LTGT ? GTU : EQ;
+ tmp0 = riscv_force_binary (word_mode, EQ, cmp_op0, cmp_op0);
+ tmp1 = riscv_force_binary (word_mode, EQ, cmp_op1, cmp_op1);
+ *op0 = riscv_force_binary (word_mode, AND, tmp0, tmp1);
+ *op1 = riscv_force_binary (word_mode, EQ, cmp_op0, cmp_op1);
+ break;
+
+#define UNORDERED_COMPARISON(CODE, CMP) \
+ case CODE: \
+ *code = EQ; \
+ *op0 = gen_reg_rtx (word_mode); \
+ if (GET_MODE (cmp_op0) == SFmode && TARGET_64BIT) \
+ emit_insn (gen_f##CMP##_quietsfdi4 (*op0, cmp_op0, cmp_op1)); \
+ else if (GET_MODE (cmp_op0) == SFmode) \
+ emit_insn (gen_f##CMP##_quietsfsi4 (*op0, cmp_op0, cmp_op1)); \
+ else if (GET_MODE (cmp_op0) == DFmode && TARGET_64BIT) \
+ emit_insn (gen_f##CMP##_quietdfdi4 (*op0, cmp_op0, cmp_op1)); \
+ else if (GET_MODE (cmp_op0) == DFmode) \
+ emit_insn (gen_f##CMP##_quietdfsi4 (*op0, cmp_op0, cmp_op1)); \
+ else \
+ gcc_unreachable (); \
+ *op1 = const0_rtx; \
+ break;
+
+ case UNLT:
+ std::swap (cmp_op0, cmp_op1);
+
+
+ UNORDERED_COMPARISON(UNGT, le)
+
+ case UNLE:
+ std::swap (cmp_op0, cmp_op1);
+
+
+ UNORDERED_COMPARISON(UNGE, lt)
+#undef UNORDERED_COMPARISON
+
+ case NE:
+ fp_code = EQ;
+ *code = EQ;
+ /* Fall through. */
+
+ case EQ:
+ case LE:
+ case LT:
+ case GE:
+ case GT:
+ /* We have instructions for these cases. */
+ *op0 = riscv_force_binary (word_mode, fp_code, cmp_op0, cmp_op1);
+ *op1 = const0_rtx;
+ break;
+
+ default:
+ gcc_unreachable ();
+ }
+}
+
+/* CODE-compare OP0 and OP1. Store the result in TARGET. */
+
+void
+riscv_expand_int_scc (rtx target, enum rtx_code code, rtx op0, rtx op1)
+{
+ riscv_extend_comparands (code, &op0, &op1);
+ op0 = force_reg (word_mode, op0);
+
+ if (code == EQ || code == NE)
+ {
+ rtx zie = riscv_zero_if_equal (op0, op1);
+ riscv_emit_binary (code, target, zie, const0_rtx);
+ }
+ else
+ riscv_emit_int_order_test (code, 0, target, op0, op1);
+}
+
+/* Like riscv_expand_int_scc, but for floating-point comparisons. */
+
+void
+riscv_expand_float_scc (rtx target, enum rtx_code code, rtx op0, rtx op1)
+{
+ riscv_emit_float_compare (&code, &op0, &op1);
+
+ rtx cmp = riscv_force_binary (word_mode, code, op0, op1);
+ riscv_emit_set (target, lowpart_subreg (SImode, cmp, word_mode));
+}
+
+/* Jump to LABEL if (CODE OP0 OP1) holds. */
+
+void
+riscv_expand_conditional_branch (rtx label, rtx_code code, rtx op0, rtx op1)
+{
+ if (FLOAT_MODE_P (GET_MODE (op1)))
+ riscv_emit_float_compare (&code, &op0, &op1);
+ else
+ riscv_emit_int_compare (&code, &op0, &op1);
+
+ rtx condition = gen_rtx_fmt_ee (code, VOIDmode, op0, op1);
+ emit_jump_insn (gen_condjump (condition, label));
+}
+
+/* Implement TARGET_FUNCTION_ARG_BOUNDARY. Every parameter gets at
+ least PARM_BOUNDARY bits of alignment, but will be given anything up
+ to STACK_BOUNDARY bits if the type requires it. */
+
+static unsigned int
+riscv_function_arg_boundary (enum machine_mode mode, const_tree type)
+{
+ unsigned int alignment;
+
+ /* Use natural alignment if the type is not aggregate data. */
+ if (type && !AGGREGATE_TYPE_P (type))
+ alignment = TYPE_ALIGN (TYPE_MAIN_VARIANT (type));
+ else
+ alignment = type ? TYPE_ALIGN (type) : GET_MODE_ALIGNMENT (mode);
+
+ return MIN (STACK_BOUNDARY, MAX (PARM_BOUNDARY, alignment));
+}
+
+/* If MODE represents an argument that can be passed or returned in
+ floating-point registers, return the number of registers, else 0. */
+
+static unsigned
+riscv_pass_mode_in_fpr_p (enum machine_mode mode)
+{
+ if (GET_MODE_UNIT_SIZE (mode) <= UNITS_PER_FP_ARG)
+ {
+ if (GET_MODE_CLASS (mode) == MODE_FLOAT)
+ return 1;
+
+ if (GET_MODE_CLASS (mode) == MODE_COMPLEX_FLOAT)
+ return 2;
+ }
+
+ return 0;
+}
+
+typedef struct {
+ const_tree type;
+ HOST_WIDE_INT offset;
+} riscv_aggregate_field;
+
+/* Identify subfields of aggregates that are candidates for passing in
+ floating-point registers. */
+
+static int
+riscv_flatten_aggregate_field (const_tree type,
+ riscv_aggregate_field fields[2],
+ int n, HOST_WIDE_INT offset)
+{
+ switch (TREE_CODE (type))
+ {
+ case RECORD_TYPE:
+ /* Can't handle incomplete types nor sizes that are not fixed. */
+ if (!COMPLETE_TYPE_P (type)
+ || TREE_CODE (TYPE_SIZE (type)) != INTEGER_CST
+ || !tree_fits_uhwi_p (TYPE_SIZE (type)))
+ return -1;
+
+ for (tree f = TYPE_FIELDS (type); f; f = DECL_CHAIN (f))
+ if (TREE_CODE (f) == FIELD_DECL)
+ {
+ if (!TYPE_P (TREE_TYPE (f)))
+ return -1;
+
+ HOST_WIDE_INT pos = offset + int_byte_position (f);
+ n = riscv_flatten_aggregate_field (TREE_TYPE (f), fields, n, pos);
+ if (n < 0)
+ return -1;
+ }
+ return n;
+
+ case ARRAY_TYPE:
+ {
+ HOST_WIDE_INT n_elts;
+ riscv_aggregate_field subfields[2];
+ tree index = TYPE_DOMAIN (type);
+ tree elt_size = TYPE_SIZE_UNIT (TREE_TYPE (type));
+ int n_subfields = riscv_flatten_aggregate_field (TREE_TYPE (type),
+ subfields, 0, offset);
+
+ /* Can't handle incomplete types nor sizes that are not fixed. */
+ if (n_subfields <= 0
+ || !COMPLETE_TYPE_P (type)
+ || TREE_CODE (TYPE_SIZE (type)) != INTEGER_CST
+ || !index
+ || !TYPE_MAX_VALUE (index)
+ || !tree_fits_uhwi_p (TYPE_MAX_VALUE (index))
+ || !TYPE_MIN_VALUE (index)
+ || !tree_fits_uhwi_p (TYPE_MIN_VALUE (index))
+ || !tree_fits_uhwi_p (elt_size))
+ return -1;
+
+ n_elts = 1 + tree_to_uhwi (TYPE_MAX_VALUE (index))
+ - tree_to_uhwi (TYPE_MIN_VALUE (index));
+ gcc_assert (n_elts >= 0);
+
+ for (HOST_WIDE_INT i = 0; i < n_elts; i++)
+ for (int j = 0; j < n_subfields; j++)
+ {
+ if (n >= 2)
+ return -1;
+
+ fields[n] = subfields[j];
+ fields[n++].offset += i * tree_to_uhwi (elt_size);
+ }
+
+ return n;
+ }
+
+ case COMPLEX_TYPE:
+ {
+ /* Complex type need consume 2 field, so n must be 0. */
+ if (n != 0)
+ return -1;
+
+ HOST_WIDE_INT elt_size = GET_MODE_SIZE (TYPE_MODE (TREE_TYPE (type)));
+
+ if (elt_size <= UNITS_PER_FP_ARG)
+ {
+ fields[0].type = TREE_TYPE (type);
+ fields[0].offset = offset;
+ fields[1].type = TREE_TYPE (type);
+ fields[1].offset = offset + elt_size;
+
+ return 2;
+ }
+
+ return -1;
+ }
+
+ default:
+ if (n < 2
+ && ((SCALAR_FLOAT_TYPE_P (type)
+ && GET_MODE_SIZE (TYPE_MODE (type)) <= UNITS_PER_FP_ARG)
+ || (INTEGRAL_TYPE_P (type)
+ && GET_MODE_SIZE (TYPE_MODE (type)) <= UNITS_PER_WORD)))
+ {
+ fields[n].type = type;
+ fields[n].offset = offset;
+ return n + 1;
+ }
+ else
+ return -1;
+ }
+}
+
+/* Identify candidate aggregates for passing in floating-point registers.
+ Candidates have at most two fields after flattening. */
+
+static int
+riscv_flatten_aggregate_argument (const_tree type,
+ riscv_aggregate_field fields[2])
+{
+ if (!type || TREE_CODE (type) != RECORD_TYPE)
+ return -1;
+
+ return riscv_flatten_aggregate_field (type, fields, 0, 0);
+}
+
+/* See whether TYPE is a record whose fields should be returned in one or
+ two floating-point registers. If so, populate FIELDS accordingly. */
+
+static unsigned
+riscv_pass_aggregate_in_fpr_pair_p (const_tree type,
+ riscv_aggregate_field fields[2])
+{
+ int n = riscv_flatten_aggregate_argument (type, fields);
+
+ for (int i = 0; i < n; i++)
+ if (!SCALAR_FLOAT_TYPE_P (fields[i].type))
+ return 0;
+
+ return n > 0 ? n : 0;
+}
+
+/* See whether TYPE is a record whose fields should be returned in one or
+ floating-point register and one integer register. If so, populate
+ FIELDS accordingly. */
+
+static bool
+riscv_pass_aggregate_in_fpr_and_gpr_p (const_tree type,
+ riscv_aggregate_field fields[2])
+{
+ unsigned num_int = 0, num_float = 0;
+ int n = riscv_flatten_aggregate_argument (type, fields);
+
+ for (int i = 0; i < n; i++)
+ {
+ num_float += SCALAR_FLOAT_TYPE_P (fields[i].type);
+ num_int += INTEGRAL_TYPE_P (fields[i].type);
+ }
+
+ return num_int == 1 && num_float == 1;
+}
+
+/* Return the representation of an argument passed or returned in an FPR
+ when the value has mode VALUE_MODE and the type has TYPE_MODE. The
+ two modes may be different for structures like:
+
+ struct __attribute__((packed)) foo { float f; }
+
+ where the SFmode value "f" is passed in REGNO but the struct itself
+ has mode BLKmode. */
+
+static rtx
+riscv_pass_fpr_single (enum machine_mode type_mode, unsigned regno,
+ enum machine_mode value_mode)
+{
+ rtx x = gen_rtx_REG (value_mode, regno);
+
+ if (type_mode != value_mode)
+ {
+ x = gen_rtx_EXPR_LIST (VOIDmode, x, const0_rtx);
+ x = gen_rtx_PARALLEL (type_mode, gen_rtvec (1, x));
+ }
+ return x;
+}
+
+/* Pass or return a composite value in the FPR pair REGNO and REGNO + 1.
+ MODE is the mode of the composite. MODE1 and OFFSET1 are the mode and
+ byte offset for the first value, likewise MODE2 and OFFSET2 for the
+ second value. */
+
+static rtx
+riscv_pass_fpr_pair (enum machine_mode mode, unsigned regno1,
+ enum machine_mode mode1, HOST_WIDE_INT offset1,
+ unsigned regno2, enum machine_mode mode2,
+ HOST_WIDE_INT offset2)
+{
+ return gen_rtx_PARALLEL
+ (mode,
+ gen_rtvec (2,
+ gen_rtx_EXPR_LIST (VOIDmode,
+ gen_rtx_REG (mode1, regno1),
+ GEN_INT (offset1)),
+ gen_rtx_EXPR_LIST (VOIDmode,
+ gen_rtx_REG (mode2, regno2),
+ GEN_INT (offset2))));
+}
+
+/* Fill INFO with information about a single argument, and return an
+ RTL pattern to pass or return the argument. CUM is the cumulative
+ state for earlier arguments. MODE is the mode of this argument and
+ TYPE is its type (if known). NAMED is true if this is a named
+ (fixed) argument rather than a variable one. RETURN_P is true if
+ returning the argument, or false if passing the argument. */
+
+static rtx
+riscv_get_arg_info (struct riscv_arg_info *info, const CUMULATIVE_ARGS *cum,
+ enum machine_mode mode, const_tree type, bool named,
+ bool return_p)
+{
+ unsigned num_bytes, num_words;
+ unsigned fpr_base = return_p ? FP_RETURN : FP_ARG_FIRST;
+ unsigned gpr_base = return_p ? GP_RETURN : GP_ARG_FIRST;
+ unsigned alignment = riscv_function_arg_boundary (mode, type);
+
+ memset (info, 0, sizeof (*info));
+ info->gpr_offset = cum->num_gprs;
+ info->fpr_offset = cum->num_fprs;
+
+ if (named)
+ {
+ riscv_aggregate_field fields[2];
+ unsigned fregno = fpr_base + info->fpr_offset;
+ unsigned gregno = gpr_base + info->gpr_offset;
+
+ /* Pass one- or two-element floating-point aggregates in FPRs. */
+ if ((info->num_fprs = riscv_pass_aggregate_in_fpr_pair_p (type, fields))
+ && info->fpr_offset + info->num_fprs <= MAX_ARGS_IN_REGISTERS)
+ switch (info->num_fprs)
+ {
+ case 1:
+ return riscv_pass_fpr_single (mode, fregno,
+ TYPE_MODE (fields[0].type));
+
+ case 2:
+ return riscv_pass_fpr_pair (mode, fregno,
+ TYPE_MODE (fields[0].type),
+ fields[0].offset,
+ fregno + 1,
+ TYPE_MODE (fields[1].type),
+ fields[1].offset);
+
+ default:
+ gcc_unreachable ();
+ }
+
+ /* Pass real and complex floating-point numbers in FPRs. */
+ if ((info->num_fprs = riscv_pass_mode_in_fpr_p (mode))
+ && info->fpr_offset + info->num_fprs <= MAX_ARGS_IN_REGISTERS)
+ switch (GET_MODE_CLASS (mode))
+ {
+ case MODE_FLOAT:
+ return gen_rtx_REG (mode, fregno);
+
+ case MODE_COMPLEX_FLOAT:
+ return riscv_pass_fpr_pair (mode, fregno, GET_MODE_INNER (mode), 0,
+ fregno + 1, GET_MODE_INNER (mode),
+ GET_MODE_UNIT_SIZE (mode));
+
+ default:
+ gcc_unreachable ();
+ }
+
+ /* Pass structs with one float and one integer in an FPR and a GPR. */
+ if (riscv_pass_aggregate_in_fpr_and_gpr_p (type, fields)
+ && info->gpr_offset < MAX_ARGS_IN_REGISTERS
+ && info->fpr_offset < MAX_ARGS_IN_REGISTERS)
+ {
+ info->num_gprs = 1;
+ info->num_fprs = 1;
+
+ if (!SCALAR_FLOAT_TYPE_P (fields[0].type))
+ std::swap (fregno, gregno);
+
+ return riscv_pass_fpr_pair (mode, fregno, TYPE_MODE (fields[0].type),
+ fields[0].offset,
+ gregno, TYPE_MODE (fields[1].type),
+ fields[1].offset);
+ }
+ }
+
+ /* Work out the size of the argument. */
+ num_bytes = type ? int_size_in_bytes (type) : GET_MODE_SIZE (mode);
+ num_words = (num_bytes + UNITS_PER_WORD - 1) / UNITS_PER_WORD;
+
+ /* Doubleword-aligned varargs start on an even register boundary. */
+ if (!named && num_bytes != 0 && alignment > BITS_PER_WORD)
+ info->gpr_offset += info->gpr_offset & 1;
+
+ /* Partition the argument between registers and stack. */
+ info->num_fprs = 0;
+ info->num_gprs = MIN (num_words, MAX_ARGS_IN_REGISTERS - info->gpr_offset);
+ info->stack_p = (num_words - info->num_gprs) != 0;
+
+ if (info->num_gprs || return_p)
+ return gen_rtx_REG (mode, gpr_base + info->gpr_offset);
+
+ return NULL_RTX;
+}
+
+/* Implement TARGET_FUNCTION_ARG. */
+
+static rtx
+riscv_function_arg (cumulative_args_t cum_v, enum machine_mode mode,
+ const_tree type, bool named)
+{
+ CUMULATIVE_ARGS *cum = get_cumulative_args (cum_v);
+ struct riscv_arg_info info;
+
+ if (mode == VOIDmode)
+ return NULL;
+
+ return riscv_get_arg_info (&info, cum, mode, type, named, false);
+}
+
+/* Implement TARGET_FUNCTION_ARG_ADVANCE. */
+
+static void
+riscv_function_arg_advance (cumulative_args_t cum_v, enum machine_mode mode,
+ const_tree type, bool named)
+{
+ CUMULATIVE_ARGS *cum = get_cumulative_args (cum_v);
+ struct riscv_arg_info info;
+
+ riscv_get_arg_info (&info, cum, mode, type, named, false);
+
+ /* Advance the register count. This has the effect of setting
+ num_gprs to MAX_ARGS_IN_REGISTERS if a doubleword-aligned
+ argument required us to skip the final GPR and pass the whole
+ argument on the stack. */
+ cum->num_fprs = info.fpr_offset + info.num_fprs;
+ cum->num_gprs = info.gpr_offset + info.num_gprs;
+}
+
+/* Implement TARGET_ARG_PARTIAL_BYTES. */
+
+static int
+riscv_arg_partial_bytes (cumulative_args_t cum,
+ enum machine_mode mode, tree type, bool named)
+{
+ struct riscv_arg_info arg;
+
+ riscv_get_arg_info (&arg, get_cumulative_args (cum), mode, type, named, false);
+ return arg.stack_p ? arg.num_gprs * UNITS_PER_WORD : 0;
+}
+
+/* Implement FUNCTION_VALUE and LIBCALL_VALUE. For normal calls,
+ VALTYPE is the return type and MODE is VOIDmode. For libcalls,
+ VALTYPE is null and MODE is the mode of the return value. */
+
+rtx
+riscv_function_value (const_tree type, const_tree func, enum machine_mode mode)
+{
+ struct riscv_arg_info info;
+ CUMULATIVE_ARGS args;
+
+ if (type)
+ {
+ int unsigned_p = TYPE_UNSIGNED (type);
+
+ mode = TYPE_MODE (type);
+
+ /* Since TARGET_PROMOTE_FUNCTION_MODE unconditionally promotes,
+ return values, promote the mode here too. */
+ mode = promote_function_mode (type, mode, &unsigned_p, func, 1);
+ }
+
+ memset (&args, 0, sizeof args);
+ return riscv_get_arg_info (&info, &args, mode, type, true, true);
+}
+
+/* Implement TARGET_PASS_BY_REFERENCE. */
+
+static bool
+riscv_pass_by_reference (cumulative_args_t cum_v, enum machine_mode mode,
+ const_tree type, bool named)
+{
+ HOST_WIDE_INT size = type ? int_size_in_bytes (type) : GET_MODE_SIZE (mode);
+ struct riscv_arg_info info;
+ CUMULATIVE_ARGS *cum = get_cumulative_args (cum_v);
+
+ /* ??? std_gimplify_va_arg_expr passes NULL for cum. Fortunately, we
+ never pass variadic arguments in floating-point registers, so we can
+ avoid the call to riscv_get_arg_info in this case. */
+ if (cum != NULL)
+ {
+ /* Don't pass by reference if we can use a floating-point register. */
+ riscv_get_arg_info (&info, cum, mode, type, named, false);
+ if (info.num_fprs)
+ return false;
+ }
+
+ /* Pass by reference if the data do not fit in two integer registers. */
+ return !IN_RANGE (size, 0, 2 * UNITS_PER_WORD);
+}
+
+/* Implement TARGET_RETURN_IN_MEMORY. */
+
+static bool
+riscv_return_in_memory (const_tree type, const_tree fndecl ATTRIBUTE_UNUSED)
+{
+ CUMULATIVE_ARGS args;
+ cumulative_args_t cum = pack_cumulative_args (&args);
+
+ /* The rules for returning in memory are the same as for passing the
+ first named argument by reference. */
+ memset (&args, 0, sizeof args);
+ return riscv_pass_by_reference (cum, TYPE_MODE (type), type, true);
+}
+
+/* Implement TARGET_SETUP_INCOMING_VARARGS. */
+
+static void
+riscv_setup_incoming_varargs (cumulative_args_t cum, enum machine_mode mode,
+ tree type, int *pretend_size ATTRIBUTE_UNUSED,
+ int no_rtl)
+{
+ CUMULATIVE_ARGS local_cum;
+ int gp_saved;
+
+ /* The caller has advanced CUM up to, but not beyond, the last named
+ argument. Advance a local copy of CUM past the last "real" named
+ argument, to find out how many registers are left over. */
+ local_cum = *get_cumulative_args (cum);
+ riscv_function_arg_advance (pack_cumulative_args (&local_cum), mode, type, 1);
+
+ /* Found out how many registers we need to save. */
+ gp_saved = MAX_ARGS_IN_REGISTERS - local_cum.num_gprs;
+
+ if (!no_rtl && gp_saved > 0)
+ {
+ rtx ptr = plus_constant (Pmode, virtual_incoming_args_rtx,
+ REG_PARM_STACK_SPACE (cfun->decl)
+ - gp_saved * UNITS_PER_WORD);
+ rtx mem = gen_frame_mem (BLKmode, ptr);
+ set_mem_alias_set (mem, get_varargs_alias_set ());
+
+ move_block_from_reg (local_cum.num_gprs + GP_ARG_FIRST,
+ mem, gp_saved);
+ }
+ if (REG_PARM_STACK_SPACE (cfun->decl) == 0)
+ cfun->machine->varargs_size = gp_saved * UNITS_PER_WORD;
+}
+
+/* Implement TARGET_EXPAND_BUILTIN_VA_START. */
+
+static void
+riscv_va_start (tree valist, rtx nextarg)
+{
+ nextarg = plus_constant (Pmode, nextarg, -cfun->machine->varargs_size);
+ std_expand_builtin_va_start (valist, nextarg);
+}
+
+/* Make ADDR suitable for use as a call or sibcall target. */
+
+rtx
+riscv_legitimize_call_address (rtx addr)
+{
+ if (!call_insn_operand (addr, VOIDmode))
+ {
+ rtx reg = RISCV_PROLOGUE_TEMP (Pmode);
+ riscv_emit_move (reg, addr);
+ return reg;
+ }
+ return addr;
+}
+
+/* Print symbolic operand OP, which is part of a HIGH or LO_SUM
+ in context CONTEXT. HI_RELOC indicates a high-part reloc. */
+
+static void
+riscv_print_operand_reloc (FILE *file, rtx op, bool hi_reloc)
+{
+ const char *reloc;
+
+ switch (riscv_classify_symbolic_expression (op))
+ {
+ case SYMBOL_ABSOLUTE:
+ reloc = hi_reloc ? "%hi" : "%lo";
+ break;
+
+ case SYMBOL_PCREL:
+ reloc = hi_reloc ? "%pcrel_hi" : "%pcrel_lo";
+ break;
+
+ case SYMBOL_TLS_LE:
+ reloc = hi_reloc ? "%tprel_hi" : "%tprel_lo";
+ break;
+
+ default:
+ gcc_unreachable ();
+ }
+
+ fprintf (file, "%s(", reloc);
+ output_addr_const (file, riscv_strip_unspec_address (op));
+ fputc (')', file);
+}
+
+/* Return true if the .AQ suffix should be added to an AMO to implement the
+ acquire portion of memory model MODEL. */
+
+static bool
+riscv_memmodel_needs_amo_acquire (enum memmodel model)
+{
+ switch (model)
+ {
+ case MEMMODEL_ACQ_REL:
+ case MEMMODEL_SEQ_CST:
+ case MEMMODEL_SYNC_SEQ_CST:
+ case MEMMODEL_ACQUIRE:
+ case MEMMODEL_CONSUME:
+ case MEMMODEL_SYNC_ACQUIRE:
+ return true;
+
+ case MEMMODEL_RELEASE:
+ case MEMMODEL_SYNC_RELEASE:
+ case MEMMODEL_RELAXED:
+ return false;
+
+ default:
+ gcc_unreachable ();
+ }
+}
+
+/* Return true if a FENCE should be emitted to before a memory access to
+ implement the release portion of memory model MODEL. */
+
+static bool
+riscv_memmodel_needs_release_fence (enum memmodel model)
+{
+ switch (model)
+ {
+ case MEMMODEL_ACQ_REL:
+ case MEMMODEL_SEQ_CST:
+ case MEMMODEL_SYNC_SEQ_CST:
+ case MEMMODEL_RELEASE:
+ case MEMMODEL_SYNC_RELEASE:
+ return true;
+
+ case MEMMODEL_ACQUIRE:
+ case MEMMODEL_CONSUME:
+ case MEMMODEL_SYNC_ACQUIRE:
+ case MEMMODEL_RELAXED:
+ return false;
+
+ default:
+ gcc_unreachable ();
+ }
+}
+
+/* Implement TARGET_PRINT_OPERAND. The RISCV-specific operand codes are:
+
+ 'h' Print the high-part relocation associated with OP, after stripping
+ any outermost HIGH.
+ 'R' Print the low-part relocation associated with OP.
+ 'C' Print the integer branch condition for comparison OP.
+ 'A' Print the atomic operation suffix for memory model OP.
+ 'F' Print a FENCE if the memory model requires a release.
+ 'z' Print x0 if OP is zero, otherwise print OP normally. */
+
+static void
+riscv_print_operand (FILE *file, rtx op, int letter)
+{
+ enum machine_mode mode = GET_MODE (op);
+ enum rtx_code code = GET_CODE (op);
+
+ switch (letter)
+ {
+ case 'h':
+ if (code == HIGH)
+ op = XEXP (op, 0);
+ riscv_print_operand_reloc (file, op, true);
+ break;
+
+ case 'R':
+ riscv_print_operand_reloc (file, op, false);
+ break;
+
+ case 'C':
+ /* The RTL names match the instruction names. */
+ fputs (GET_RTX_NAME (code), file);
+ break;
+
+ case 'A':
+ if (riscv_memmodel_needs_amo_acquire ((enum memmodel) INTVAL (op)))
+ fputs (".aq", file);
+ break;
+
+ case 'F':
+ if (riscv_memmodel_needs_release_fence ((enum memmodel) INTVAL (op)))
+ fputs ("fence iorw,ow; ", file);
+ break;
+
+ default:
+ switch (code)
+ {
+ case REG:
+ if (letter && letter != 'z')
+ output_operand_lossage ("invalid use of '%%%c'", letter);
+ fprintf (file, "%s", reg_names[REGNO (op)]);
+ break;
+
+ case MEM:
+ if (letter && letter != 'z')
+ output_operand_lossage ("invalid use of '%%%c'", letter);
+ else
+ output_address (mode, XEXP (op, 0));
+ break;
+
+ default:
+ if (letter == 'z' && op == CONST0_RTX (GET_MODE (op)))
+ fputs (reg_names[GP_REG_FIRST], file);
+ else if (letter && letter != 'z')
+ output_operand_lossage ("invalid use of '%%%c'", letter);
+ else
+ output_addr_const (file, riscv_strip_unspec_address (op));
+ break;
+ }
+ }
+}
+
+/* Implement TARGET_PRINT_OPERAND_ADDRESS. */
+
+static void
+riscv_print_operand_address (FILE *file, machine_mode mode ATTRIBUTE_UNUSED, rtx x)
+{
+ struct riscv_address_info addr;
+
+ if (riscv_classify_address (&addr, x, word_mode, true))
+ switch (addr.type)
+ {
+ case ADDRESS_REG:
+ riscv_print_operand (file, addr.offset, 0);
+ fprintf (file, "(%s)", reg_names[REGNO (addr.reg)]);
+ return;
+
+ case ADDRESS_LO_SUM:
+ riscv_print_operand_reloc (file, addr.offset, false);
+ fprintf (file, "(%s)", reg_names[REGNO (addr.reg)]);
+ return;
+
+ case ADDRESS_CONST_INT:
+ output_addr_const (file, x);
+ fprintf (file, "(%s)", reg_names[GP_REG_FIRST]);
+ return;
+
+ case ADDRESS_SYMBOLIC:
+ output_addr_const (file, riscv_strip_unspec_address (x));
+ return;
+ }
+ gcc_unreachable ();
+}
+
+static bool
+riscv_size_ok_for_small_data_p (int size)
+{
+ return g_switch_value && IN_RANGE (size, 1, g_switch_value);
+}
+
+/* Return true if EXP should be placed in the small data section. */
+
+static bool
+riscv_in_small_data_p (const_tree x)
+{
+ if (TREE_CODE (x) == STRING_CST || TREE_CODE (x) == FUNCTION_DECL)
+ return false;
+
+ if (TREE_CODE (x) == VAR_DECL && DECL_SECTION_NAME (x))
+ {
+ const char *sec = DECL_SECTION_NAME (x);
+ return strcmp (sec, ".sdata") == 0 || strcmp (sec, ".sbss") == 0;
+ }
+
+ return riscv_size_ok_for_small_data_p (int_size_in_bytes (TREE_TYPE (x)));
+}
+
+/* Return a section for X, handling small data. */
+
+static section *
+riscv_elf_select_rtx_section (enum machine_mode mode, rtx x,
+ unsigned HOST_WIDE_INT align)
+{
+ section *s = default_elf_select_rtx_section (mode, x, align);
+
+ if (riscv_size_ok_for_small_data_p (GET_MODE_SIZE (mode)))
+ {
+ if (strncmp (s->named.name, ".rodata.cst", strlen (".rodata.cst")) == 0)
+ {
+ /* Rename .rodata.cst* to .srodata.cst*. */
+ char *name = (char *) alloca (strlen (s->named.name) + 2);
+ sprintf (name, ".s%s", s->named.name + 1);
+ return get_section (name, s->named.common.flags, NULL);
+ }
+
+ if (s == data_section)
+ return sdata_section;
+ }
+
+ return s;
+}
+
+/* Make the last instruction frame-related and note that it performs
+ the operation described by FRAME_PATTERN. */
+
+static void
+riscv_set_frame_expr (rtx frame_pattern)
+{
+ rtx insn;
+
+ insn = get_last_insn ();
+ RTX_FRAME_RELATED_P (insn) = 1;
+ REG_NOTES (insn) = alloc_EXPR_LIST (REG_FRAME_RELATED_EXPR,
+ frame_pattern,
+ REG_NOTES (insn));
+}
+
+/* Return a frame-related rtx that stores REG at MEM.
+ REG must be a single register. */
+
+static rtx
+riscv_frame_set (rtx mem, rtx reg)
+{
+ rtx set = gen_rtx_SET (mem, reg);
+ RTX_FRAME_RELATED_P (set) = 1;
+ return set;
+}
+
+/* Return true if the current function must save register REGNO. */
+
+static bool
+riscv_save_reg_p (unsigned int regno)
+{
+ bool call_saved = !global_regs[regno] && !call_used_regs[regno];
+ bool might_clobber = crtl->saves_all_registers
+ || df_regs_ever_live_p (regno);
+
+ if (call_saved && might_clobber)
+ return true;
+
+ if (regno == HARD_FRAME_POINTER_REGNUM && frame_pointer_needed)
+ return true;
+
+ if (regno == RETURN_ADDR_REGNUM && crtl->calls_eh_return)
+ return true;
+
+ return false;
+}
+
+/* Determine whether to call GPR save/restore routines. */
+static bool
+riscv_use_save_libcall (const struct riscv_frame_info *frame)
+{
+ if (!TARGET_SAVE_RESTORE || crtl->calls_eh_return || frame_pointer_needed)
+ return false;
+
+ return frame->save_libcall_adjustment != 0;
+}
+
+/* Determine which GPR save/restore routine to call. */
+
+static unsigned
+riscv_save_libcall_count (unsigned mask)
+{
+ for (unsigned n = GP_REG_LAST; n > GP_REG_FIRST; n--)
+ if (BITSET_P (mask, n))
+ return CALLEE_SAVED_REG_NUMBER (n) + 1;
+ abort ();
+}
+
+/* Populate the current function's riscv_frame_info structure.
+
+ RISC-V stack frames grown downward. High addresses are at the top.
+
+ +-------------------------------+
+ | |
+ | incoming stack arguments |
+ | |
+ +-------------------------------+ <-- incoming stack pointer
+ | |
+ | callee-allocated save area |
+ | for arguments that are |
+ | split between registers and |
+ | the stack |
+ | |
+ +-------------------------------+ <-- arg_pointer_rtx
+ | |
+ | callee-allocated save area |
+ | for register varargs |
+ | |
+ +-------------------------------+ <-- hard_frame_pointer_rtx;
+ | | stack_pointer_rtx + gp_sp_offset
+ | GPR save area | + UNITS_PER_WORD
+ | |
+ +-------------------------------+ <-- stack_pointer_rtx + fp_sp_offset
+ | | + UNITS_PER_HWVALUE
+ | FPR save area |
+ | |
+ +-------------------------------+ <-- frame_pointer_rtx (virtual)
+ | |
+ | local variables |
+ | |
+ P +-------------------------------+
+ | |
+ | outgoing stack arguments |
+ | |
+ +-------------------------------+ <-- stack_pointer_rtx
+
+ Dynamic stack allocations such as alloca insert data at point P.
+ They decrease stack_pointer_rtx but leave frame_pointer_rtx and
+ hard_frame_pointer_rtx unchanged. */
+
+static void
+riscv_compute_frame_info (void)
+{
+ struct riscv_frame_info *frame;
+ HOST_WIDE_INT offset;
+ unsigned int regno, i, num_x_saved = 0, num_f_saved = 0;
+
+ frame = &cfun->machine->frame;
+ memset (frame, 0, sizeof (*frame));
+
+ /* Find out which GPRs we need to save. */
+ for (regno = GP_REG_FIRST; regno <= GP_REG_LAST; regno++)
+ if (riscv_save_reg_p (regno))
+ frame->mask |= 1 << (regno - GP_REG_FIRST), num_x_saved++;
+
+ /* If this function calls eh_return, we must also save and restore the
+ EH data registers. */
+ if (crtl->calls_eh_return)
+ for (i = 0; (regno = EH_RETURN_DATA_REGNO (i)) != INVALID_REGNUM; i++)
+ frame->mask |= 1 << (regno - GP_REG_FIRST), num_x_saved++;
+
+ /* Find out which FPRs we need to save. This loop must iterate over
+ the same space as its companion in riscv_for_each_saved_reg. */
+ if (TARGET_HARD_FLOAT)
+ for (regno = FP_REG_FIRST; regno <= FP_REG_LAST; regno++)
+ if (riscv_save_reg_p (regno))
+ frame->fmask |= 1 << (regno - FP_REG_FIRST), num_f_saved++;
+
+ /* At the bottom of the frame are any outgoing stack arguments. */
+ offset = crtl->outgoing_args_size;
+ /* Next are local stack variables. */
+ offset += RISCV_STACK_ALIGN (get_frame_size ());
+ /* The virtual frame pointer points above the local variables. */
+ frame->frame_pointer_offset = offset;
+ /* Next are the callee-saved FPRs. */
+ if (frame->fmask)
+ offset += RISCV_STACK_ALIGN (num_f_saved * UNITS_PER_FP_REG);
+ frame->fp_sp_offset = offset - UNITS_PER_FP_REG;
+ /* Next are the callee-saved GPRs. */
+ if (frame->mask)
+ {
+ unsigned x_save_size = RISCV_STACK_ALIGN (num_x_saved * UNITS_PER_WORD);
+ unsigned num_save_restore = 1 + riscv_save_libcall_count (frame->mask);
+
+ /* Only use save/restore routines if they don't alter the stack size. */
+ if (RISCV_STACK_ALIGN (num_save_restore * UNITS_PER_WORD) == x_save_size)
+ frame->save_libcall_adjustment = x_save_size;
+
+ offset += x_save_size;
+ }
+ frame->gp_sp_offset = offset - UNITS_PER_WORD;
+ /* The hard frame pointer points above the callee-saved GPRs. */
+ frame->hard_frame_pointer_offset = offset;
+ /* Above the hard frame pointer is the callee-allocated varags save area. */
+ offset += RISCV_STACK_ALIGN (cfun->machine->varargs_size);
+ frame->arg_pointer_offset = offset;
+ /* Next is the callee-allocated area for pretend stack arguments. */
+ offset += crtl->args.pretend_args_size;
+ frame->total_size = offset;
+ /* Next points the incoming stack pointer and any incoming arguments. */
+
+ /* Only use save/restore routines when the GPRs are atop the frame. */
+ if (frame->hard_frame_pointer_offset != frame->total_size)
+ frame->save_libcall_adjustment = 0;
+}
+
+/* Make sure that we're not trying to eliminate to the wrong hard frame
+ pointer. */
+
+static bool
+riscv_can_eliminate (const int from ATTRIBUTE_UNUSED, const int to)
+{
+ return (to == HARD_FRAME_POINTER_REGNUM || to == STACK_POINTER_REGNUM);
+}
+
+/* Implement INITIAL_ELIMINATION_OFFSET. FROM is either the frame pointer
+ or argument pointer. TO is either the stack pointer or hard frame
+ pointer. */
+
+HOST_WIDE_INT
+riscv_initial_elimination_offset (int from, int to)
+{
+ HOST_WIDE_INT src, dest;
+
+ riscv_compute_frame_info ();
+
+ if (to == HARD_FRAME_POINTER_REGNUM)
+ dest = cfun->machine->frame.hard_frame_pointer_offset;
+ else if (to == STACK_POINTER_REGNUM)
+ dest = 0; /* The stack pointer is the base of all offsets, hence 0. */
+ else
+ gcc_unreachable ();
+
+ if (from == FRAME_POINTER_REGNUM)
+ src = cfun->machine->frame.frame_pointer_offset;
+ else if (from == ARG_POINTER_REGNUM)
+ src = cfun->machine->frame.arg_pointer_offset;
+ else
+ gcc_unreachable ();
+
+ return src - dest;
+}
+
+/* Implement RETURN_ADDR_RTX. We do not support moving back to a
+ previous frame. */
+
+rtx
+riscv_return_addr (int count, rtx frame ATTRIBUTE_UNUSED)
+{
+ if (count != 0)
+ return const0_rtx;
+
+ return get_hard_reg_initial_val (Pmode, RETURN_ADDR_REGNUM);
+}
+
+/* Emit code to change the current function's return address to
+ ADDRESS. SCRATCH is available as a scratch register, if needed.
+ ADDRESS and SCRATCH are both word-mode GPRs. */
+
+void
+riscv_set_return_address (rtx address, rtx scratch)
+{
+ rtx slot_address;
+
+ gcc_assert (BITSET_P (cfun->machine->frame.mask, RETURN_ADDR_REGNUM));
+ slot_address = riscv_add_offset (scratch, stack_pointer_rtx,
+ cfun->machine->frame.gp_sp_offset);
+ riscv_emit_move (gen_frame_mem (GET_MODE (address), slot_address), address);
+}
+
+/* A function to save or store a register. The first argument is the
+ register and the second is the stack slot. */
+typedef void (*riscv_save_restore_fn) (rtx, rtx);
+
+/* Use FN to save or restore register REGNO. MODE is the register's
+ mode and OFFSET is the offset of its save slot from the current
+ stack pointer. */
+
+static void
+riscv_save_restore_reg (enum machine_mode mode, int regno,
+ HOST_WIDE_INT offset, riscv_save_restore_fn fn)
+{
+ rtx mem;
+
+ mem = gen_frame_mem (mode, plus_constant (Pmode, stack_pointer_rtx, offset));
+ fn (gen_rtx_REG (mode, regno), mem);
+}
+
+/* Call FN for each register that is saved by the current function.
+ SP_OFFSET is the offset of the current stack pointer from the start
+ of the frame. */
+
+static void
+riscv_for_each_saved_reg (HOST_WIDE_INT sp_offset, riscv_save_restore_fn fn)
+{
+ HOST_WIDE_INT offset;
+
+ /* Save the link register and s-registers. */
+ offset = cfun->machine->frame.gp_sp_offset - sp_offset;
+ for (int regno = GP_REG_FIRST; regno <= GP_REG_LAST-1; regno++)
+ if (BITSET_P (cfun->machine->frame.mask, regno - GP_REG_FIRST))
+ {
+ riscv_save_restore_reg (word_mode, regno, offset, fn);
+ offset -= UNITS_PER_WORD;
+ }
+
+ /* This loop must iterate over the same space as its companion in
+ riscv_compute_frame_info. */
+ offset = cfun->machine->frame.fp_sp_offset - sp_offset;
+ for (int regno = FP_REG_FIRST; regno <= FP_REG_LAST; regno++)
+ if (BITSET_P (cfun->machine->frame.fmask, regno - FP_REG_FIRST))
+ {
+ enum machine_mode mode = TARGET_DOUBLE_FLOAT ? DFmode : SFmode;
+
+ riscv_save_restore_reg (mode, regno, offset, fn);
+ offset -= GET_MODE_SIZE (mode);
+ }
+}
+
+/* Save register REG to MEM. Make the instruction frame-related. */
+
+static void
+riscv_save_reg (rtx reg, rtx mem)
+{
+ riscv_emit_move (mem, reg);
+ riscv_set_frame_expr (riscv_frame_set (mem, reg));
+}
+
+/* Restore register REG from MEM. */
+
+static void
+riscv_restore_reg (rtx reg, rtx mem)
+{
+ rtx insn = riscv_emit_move (reg, mem);
+ rtx dwarf = NULL_RTX;
+ dwarf = alloc_reg_note (REG_CFA_RESTORE, reg, dwarf);
+ REG_NOTES (insn) = dwarf;
+
+ RTX_FRAME_RELATED_P (insn) = 1;
+}
+
+/* Return the code to invoke the GPR save routine. */
+
+const char *
+riscv_output_gpr_save (unsigned mask)
+{
+ static char s[32];
+ unsigned n = riscv_save_libcall_count (mask);
+
+ ssize_t bytes = snprintf (s, sizeof (s), "call\tt0,__riscv_save_%u", n);
+ gcc_assert ((size_t) bytes < sizeof (s));
+
+ return s;
+}
+
+/* For stack frames that can't be allocated with a single ADDI instruction,
+ compute the best value to initially allocate. It must at a minimum
+ allocate enough space to spill the callee-saved registers. */
+
+static HOST_WIDE_INT
+riscv_first_stack_step (struct riscv_frame_info *frame)
+{
+ HOST_WIDE_INT min_first_step = frame->total_size - frame->fp_sp_offset;
+ HOST_WIDE_INT max_first_step = IMM_REACH / 2 - STACK_BOUNDARY / 8;
+
+ if (SMALL_OPERAND (frame->total_size))
+ return frame->total_size;
+
+ /* As an optimization, use the least-significant bits of the total frame
+ size, so that the second adjustment step is just LUI + ADD. */
+ if (!SMALL_OPERAND (frame->total_size - max_first_step)
+ && frame->total_size % IMM_REACH < IMM_REACH / 2
+ && frame->total_size % IMM_REACH >= min_first_step)
+ return frame->total_size % IMM_REACH;
+
+ gcc_assert (min_first_step <= max_first_step);
+ return max_first_step;
+}
+
+static rtx
+riscv_adjust_libcall_cfi_prologue ()
+{
+ rtx dwarf = NULL_RTX;
+ rtx adjust_sp_rtx, reg, mem, insn;
+ int saved_size = cfun->machine->frame.save_libcall_adjustment;
+ int offset;
+
+ for (int regno = GP_REG_FIRST; regno <= GP_REG_LAST-1; regno++)
+ if (BITSET_P (cfun->machine->frame.mask, regno - GP_REG_FIRST))
+ {
+ /* The save order is ra, s0, s1, s2 to s11. */
+ if (regno == RETURN_ADDR_REGNUM)
+ offset = saved_size - UNITS_PER_WORD;
+ else if (regno == S0_REGNUM)
+ offset = saved_size - UNITS_PER_WORD * 2;
+ else if (regno == S1_REGNUM)
+ offset = saved_size - UNITS_PER_WORD * 3;
+ else
+ offset = saved_size - ((regno - S2_REGNUM + 4) * UNITS_PER_WORD);
+
+ reg = gen_rtx_REG (SImode, regno);
+ mem = gen_frame_mem (SImode, plus_constant (Pmode,
+ stack_pointer_rtx,
+ offset));
+
+ insn = gen_rtx_SET (mem, reg);
+ dwarf = alloc_reg_note (REG_CFA_OFFSET, insn, dwarf);
+ }
+
+ /* Debug info for adjust sp. */
+ adjust_sp_rtx = gen_add3_insn (stack_pointer_rtx,
+ stack_pointer_rtx, GEN_INT (-saved_size));
+ dwarf = alloc_reg_note (REG_CFA_ADJUST_CFA, adjust_sp_rtx,
+ dwarf);
+ return dwarf;
+}
+
+static void
+riscv_emit_stack_tie (void)
+{
+ if (Pmode == SImode)
+ emit_insn (gen_stack_tiesi (stack_pointer_rtx, hard_frame_pointer_rtx));
+ else
+ emit_insn (gen_stack_tiedi (stack_pointer_rtx, hard_frame_pointer_rtx));
+}
+
+/* Expand the "prologue" pattern. */
+
+void
+riscv_expand_prologue (void)
+{
+ struct riscv_frame_info *frame = &cfun->machine->frame;
+ HOST_WIDE_INT size = frame->total_size;
+ unsigned mask = frame->mask;
+ rtx insn;
+
+ if (flag_stack_usage_info)
+ current_function_static_stack_size = size;
+
+ /* When optimizing for size, call a subroutine to save the registers. */
+ if (riscv_use_save_libcall (frame))
+ {
+ rtx dwarf = NULL_RTX;
+ dwarf = riscv_adjust_libcall_cfi_prologue ();
+
+ frame->mask = 0; /* Temporarily fib that we need not save GPRs. */
+ size -= frame->save_libcall_adjustment;
+ insn = emit_insn (gen_gpr_save (GEN_INT (mask)));
+
+ RTX_FRAME_RELATED_P (insn) = 1;
+ REG_NOTES (insn) = dwarf;
+ }
+
+ /* Save the registers. */
+ if ((frame->mask | frame->fmask) != 0)
+ {
+ HOST_WIDE_INT step1 = MIN (size, riscv_first_stack_step (frame));
+
+ insn = gen_add3_insn (stack_pointer_rtx,
+ stack_pointer_rtx,
+ GEN_INT (-step1));
+ RTX_FRAME_RELATED_P (emit_insn (insn)) = 1;
+ size -= step1;
+ riscv_for_each_saved_reg (size, riscv_save_reg);
+ }
+
+ frame->mask = mask; /* Undo the above fib. */
+
+ /* Set up the frame pointer, if we're using one. */
+ if (frame_pointer_needed)
+ {
+ insn = gen_add3_insn (hard_frame_pointer_rtx, stack_pointer_rtx,
+ GEN_INT (frame->hard_frame_pointer_offset - size));
+ RTX_FRAME_RELATED_P (emit_insn (insn)) = 1;
+
+ riscv_emit_stack_tie ();
+ }
+
+ /* Allocate the rest of the frame. */
+ if (size > 0)
+ {
+ if (SMALL_OPERAND (-size))
+ {
+ insn = gen_add3_insn (stack_pointer_rtx, stack_pointer_rtx,
+ GEN_INT (-size));
+ RTX_FRAME_RELATED_P (emit_insn (insn)) = 1;
+ }
+ else
+ {
+ riscv_emit_move (RISCV_PROLOGUE_TEMP (Pmode), GEN_INT (-size));
+ emit_insn (gen_add3_insn (stack_pointer_rtx,
+ stack_pointer_rtx,
+ RISCV_PROLOGUE_TEMP (Pmode)));
+
+ /* Describe the effect of the previous instructions. */
+ insn = plus_constant (Pmode, stack_pointer_rtx, -size);
+ insn = gen_rtx_SET (stack_pointer_rtx, insn);
+ riscv_set_frame_expr (insn);
+ }
+ }
+}
+
+static rtx
+riscv_adjust_libcall_cfi_epilogue ()
+{
+ rtx dwarf = NULL_RTX;
+ rtx adjust_sp_rtx, reg;
+ int saved_size = cfun->machine->frame.save_libcall_adjustment;
+
+ /* Debug info for adjust sp. */
+ adjust_sp_rtx = gen_add3_insn (stack_pointer_rtx,
+ stack_pointer_rtx, GEN_INT (saved_size));
+ dwarf = alloc_reg_note (REG_CFA_ADJUST_CFA, adjust_sp_rtx,
+ dwarf);
+
+ for (int regno = GP_REG_FIRST; regno <= GP_REG_LAST-1; regno++)
+ if (BITSET_P (cfun->machine->frame.mask, regno - GP_REG_FIRST))
+ {
+ reg = gen_rtx_REG (SImode, regno);
+ dwarf = alloc_reg_note (REG_CFA_RESTORE, reg, dwarf);
+ }
+
+ return dwarf;
+}
+
+/* Expand an "epilogue" or "sibcall_epilogue" pattern; SIBCALL_P
+ says which. */
+
+void
+riscv_expand_epilogue (bool sibcall_p)
+{
+ /* Split the frame into two. STEP1 is the amount of stack we should
+ deallocate before restoring the registers. STEP2 is the amount we
+ should deallocate afterwards.
+
+ Start off by assuming that no registers need to be restored. */
+ struct riscv_frame_info *frame = &cfun->machine->frame;
+ unsigned mask = frame->mask;
+ HOST_WIDE_INT step1 = frame->total_size;
+ HOST_WIDE_INT step2 = 0;
+ bool use_restore_libcall = !sibcall_p && riscv_use_save_libcall (frame);
+ rtx ra = gen_rtx_REG (Pmode, RETURN_ADDR_REGNUM);
+ rtx insn;
+
+ /* We need to add memory barrier to prevent read from deallocated stack. */
+ bool need_barrier_p = (get_frame_size ()
+ + cfun->machine->frame.arg_pointer_offset) != 0;
+
+ if (!sibcall_p && riscv_can_use_return_insn ())
+ {
+ emit_jump_insn (gen_return ());
+ return;
+ }
+
+ /* Move past any dynamic stack allocations. */
+ if (cfun->calls_alloca)
+ {
+ /* Emit a barrier to prevent loads from a deallocated stack. */
+ riscv_emit_stack_tie ();
+ need_barrier_p = false;
+
+ rtx adjust = GEN_INT (-frame->hard_frame_pointer_offset);
+ if (!SMALL_OPERAND (INTVAL (adjust)))
+ {
+ riscv_emit_move (RISCV_PROLOGUE_TEMP (Pmode), adjust);
+ adjust = RISCV_PROLOGUE_TEMP (Pmode);
+ }
+
+ insn = emit_insn (
+ gen_add3_insn (stack_pointer_rtx, hard_frame_pointer_rtx,
+ adjust));
+
+ rtx dwarf = NULL_RTX;
+ rtx cfa_adjust_value = gen_rtx_PLUS (
+ Pmode, hard_frame_pointer_rtx,
+ GEN_INT (-frame->hard_frame_pointer_offset));
+ rtx cfa_adjust_rtx = gen_rtx_SET (stack_pointer_rtx, cfa_adjust_value);
+ dwarf = alloc_reg_note (REG_CFA_ADJUST_CFA, cfa_adjust_rtx, dwarf);
+ RTX_FRAME_RELATED_P (insn) = 1;
+
+ REG_NOTES (insn) = dwarf;
+ }
+
+ /* If we need to restore registers, deallocate as much stack as
+ possible in the second step without going out of range. */
+ if ((frame->mask | frame->fmask) != 0)
+ {
+ step2 = riscv_first_stack_step (frame);
+ step1 -= step2;
+ }
+
+ /* Set TARGET to BASE + STEP1. */
+ if (step1 > 0)
+ {
+ /* Emit a barrier to prevent loads from a deallocated stack. */
+ riscv_emit_stack_tie ();
+ need_barrier_p = false;
+
+ /* Get an rtx for STEP1 that we can add to BASE. */
+ rtx adjust = GEN_INT (step1);
+ if (!SMALL_OPERAND (step1))
+ {
+ riscv_emit_move (RISCV_PROLOGUE_TEMP (Pmode), adjust);
+ adjust = RISCV_PROLOGUE_TEMP (Pmode);
+ }
+
+ insn = emit_insn (
+ gen_add3_insn (stack_pointer_rtx, stack_pointer_rtx, adjust));
+
+ rtx dwarf = NULL_RTX;
+ rtx cfa_adjust_rtx = gen_rtx_PLUS (Pmode, stack_pointer_rtx,
+ GEN_INT (step2));
+
+ dwarf = alloc_reg_note (REG_CFA_DEF_CFA, cfa_adjust_rtx, dwarf);
+ RTX_FRAME_RELATED_P (insn) = 1;
+
+ REG_NOTES (insn) = dwarf;
+ }
+
+ if (use_restore_libcall)
+ frame->mask = 0; /* Temporarily fib that we need not save GPRs. */
+
+ /* Restore the registers. */
+ riscv_for_each_saved_reg (frame->total_size - step2, riscv_restore_reg);
+
+ if (use_restore_libcall)
+ {
+ frame->mask = mask; /* Undo the above fib. */
+ gcc_assert (step2 >= frame->save_libcall_adjustment);
+ step2 -= frame->save_libcall_adjustment;
+ }
+
+ if (need_barrier_p)
+ riscv_emit_stack_tie ();
+
+ /* Deallocate the final bit of the frame. */
+ if (step2 > 0)
+ {
+ insn = emit_insn (gen_add3_insn (stack_pointer_rtx, stack_pointer_rtx,
+ GEN_INT (step2)));
+
+ rtx dwarf = NULL_RTX;
+ rtx cfa_adjust_rtx = gen_rtx_PLUS (Pmode, stack_pointer_rtx,
+ const0_rtx);
+ dwarf = alloc_reg_note (REG_CFA_DEF_CFA, cfa_adjust_rtx, dwarf);
+ RTX_FRAME_RELATED_P (insn) = 1;
+
+ REG_NOTES (insn) = dwarf;
+ }
+
+ if (use_restore_libcall)
+ {
+ rtx dwarf = riscv_adjust_libcall_cfi_epilogue ();
+ insn = emit_insn (gen_gpr_restore (GEN_INT (riscv_save_libcall_count (mask))));
+ RTX_FRAME_RELATED_P (insn) = 1;
+ REG_NOTES (insn) = dwarf;
+
+ emit_jump_insn (gen_gpr_restore_return (ra));
+ return;
+ }
+
+ /* Add in the __builtin_eh_return stack adjustment. */
+ if (crtl->calls_eh_return)
+ emit_insn (gen_add3_insn (stack_pointer_rtx, stack_pointer_rtx,
+ EH_RETURN_STACKADJ_RTX));
+
+ if (!sibcall_p)
+ emit_jump_insn (gen_simple_return_internal (ra));
+}
+
+/* Return nonzero if this function is known to have a null epilogue.
+ This allows the optimizer to omit jumps to jumps if no stack
+ was created. */
+
+bool
+riscv_can_use_return_insn (void)
+{
+ return reload_completed && cfun->machine->frame.total_size == 0;
+}
+
+/* Implement TARGET_REGISTER_MOVE_COST. */
+
+static int
+riscv_register_move_cost (enum machine_mode mode,
+ reg_class_t from, reg_class_t to)
+{
+ return SECONDARY_MEMORY_NEEDED (from, to, mode) ? 8 : 2;
+}
+
+/* Return true if register REGNO can store a value of mode MODE. */
+
+bool
+riscv_hard_regno_mode_ok_p (unsigned int regno, enum machine_mode mode)
+{
+ unsigned int nregs = riscv_hard_regno_nregs (regno, mode);
+
+ if (GP_REG_P (regno))
+ {
+ if (!GP_REG_P (regno + nregs - 1))
+ return false;
+ }
+ else if (FP_REG_P (regno))
+ {
+ if (!FP_REG_P (regno + nregs - 1))
+ return false;
+
+ if (GET_MODE_CLASS (mode) != MODE_FLOAT
+ && GET_MODE_CLASS (mode) != MODE_COMPLEX_FLOAT)
+ return false;
+
+ /* Only use callee-saved registers if a potential callee is guaranteed
+ to spill the requisite width. */
+ if (GET_MODE_UNIT_SIZE (mode) > UNITS_PER_FP_REG
+ || (!call_used_regs[regno]
+ && GET_MODE_UNIT_SIZE (mode) > UNITS_PER_FP_ARG))
+ return false;
+ }
+ else
+ return false;
+
+ /* Require same callee-savedness for all registers. */
+ for (unsigned i = 1; i < nregs; i++)
+ if (call_used_regs[regno] != call_used_regs[regno + i])
+ return false;
+
+ return true;
+}
+
+/* Implement HARD_REGNO_NREGS. */
+
+unsigned int
+riscv_hard_regno_nregs (int regno, enum machine_mode mode)
+{
+ if (FP_REG_P (regno))
+ return (GET_MODE_SIZE (mode) + UNITS_PER_FP_REG - 1) / UNITS_PER_FP_REG;
+
+ /* All other registers are word-sized. */
+ return (GET_MODE_SIZE (mode) + UNITS_PER_WORD - 1) / UNITS_PER_WORD;
+}
+
+/* Implement CLASS_MAX_NREGS. */
+
+static unsigned char
+riscv_class_max_nregs (reg_class_t rclass, enum machine_mode mode)
+{
+ if (reg_class_subset_p (FP_REGS, rclass))
+ return riscv_hard_regno_nregs (FP_REG_FIRST, mode);
+
+ if (reg_class_subset_p (GR_REGS, rclass))
+ return riscv_hard_regno_nregs (GP_REG_FIRST, mode);
+
+ return 0;
+}
+
+/* Implement TARGET_MEMORY_MOVE_COST. */
+
+static int
+riscv_memory_move_cost (enum machine_mode mode, reg_class_t rclass, bool in)
+{
+ return (tune_info->memory_cost
+ + memory_move_secondary_cost (mode, rclass, in));
+}
+
+/* Return the number of instructions that can be issued per cycle. */
+
+static int
+riscv_issue_rate (void)
+{
+ return tune_info->issue_rate;
+}
+
+/* Implement TARGET_ASM_FILE_START. */
+
+static void
+riscv_file_start (void)
+{
+ default_file_start ();
+
+ /* Instruct GAS to generate position-[in]dependent code. */
+ fprintf (asm_out_file, "\t.option %spic\n", (flag_pic ? "" : "no"));
+}
+
+/* Implement TARGET_ASM_OUTPUT_MI_THUNK. Generate rtl rather than asm text
+ in order to avoid duplicating too much logic from elsewhere. */
+
+static void
+riscv_output_mi_thunk (FILE *file, tree thunk_fndecl ATTRIBUTE_UNUSED,
+ HOST_WIDE_INT delta, HOST_WIDE_INT vcall_offset,
+ tree function)
+{
+ rtx this_rtx, temp1, temp2, fnaddr;
+ rtx_insn *insn;
+
+ /* Pretend to be a post-reload pass while generating rtl. */
+ reload_completed = 1;
+
+ /* Mark the end of the (empty) prologue. */
+ emit_note (NOTE_INSN_PROLOGUE_END);
+
+ /* Determine if we can use a sibcall to call FUNCTION directly. */
+ fnaddr = gen_rtx_MEM (FUNCTION_MODE, XEXP (DECL_RTL (function), 0));
+
+ /* We need two temporary registers in some cases. */
+ temp1 = gen_rtx_REG (Pmode, RISCV_PROLOGUE_TEMP_REGNUM);
+ temp2 = gen_rtx_REG (Pmode, STATIC_CHAIN_REGNUM);
+
+ /* Find out which register contains the "this" pointer. */
+ if (aggregate_value_p (TREE_TYPE (TREE_TYPE (function)), function))
+ this_rtx = gen_rtx_REG (Pmode, GP_ARG_FIRST + 1);
+ else
+ this_rtx = gen_rtx_REG (Pmode, GP_ARG_FIRST);
+
+ /* Add DELTA to THIS_RTX. */
+ if (delta != 0)
+ {
+ rtx offset = GEN_INT (delta);
+ if (!SMALL_OPERAND (delta))
+ {
+ riscv_emit_move (temp1, offset);
+ offset = temp1;
+ }
+ emit_insn (gen_add3_insn (this_rtx, this_rtx, offset));
+ }
+
+ /* If needed, add *(*THIS_RTX + VCALL_OFFSET) to THIS_RTX. */
+ if (vcall_offset != 0)
+ {
+ rtx addr;
+
+ /* Set TEMP1 to *THIS_RTX. */
+ riscv_emit_move (temp1, gen_rtx_MEM (Pmode, this_rtx));
+
+ /* Set ADDR to a legitimate address for *THIS_RTX + VCALL_OFFSET. */
+ addr = riscv_add_offset (temp2, temp1, vcall_offset);
+
+ /* Load the offset and add it to THIS_RTX. */
+ riscv_emit_move (temp1, gen_rtx_MEM (Pmode, addr));
+ emit_insn (gen_add3_insn (this_rtx, this_rtx, temp1));
+ }
+
+ /* Jump to the target function. */
+ insn = emit_call_insn (gen_sibcall (fnaddr, const0_rtx, NULL, const0_rtx));
+ SIBLING_CALL_P (insn) = 1;
+
+ /* Run just enough of rest_of_compilation. This sequence was
+ "borrowed" from alpha.c. */
+ insn = get_insns ();
+ split_all_insns_noflow ();
+ shorten_branches (insn);
+ final_start_function (insn, file, 1);
+ final (insn, file, 1);
+ final_end_function ();
+
+ /* Clean up the vars set above. Note that final_end_function resets
+ the global pointer for us. */
+ reload_completed = 0;
+}
+
+/* Allocate a chunk of memory for per-function machine-dependent data. */
+
+static struct machine_function *
+riscv_init_machine_status (void)
+{
+ return ggc_cleared_alloc<machine_function> ();
+}
+
+/* Implement TARGET_OPTION_OVERRIDE. */
+
+static void
+riscv_option_override (void)
+{
+ const struct riscv_cpu_info *cpu;
+
+#ifdef SUBTARGET_OVERRIDE_OPTIONS
+ SUBTARGET_OVERRIDE_OPTIONS;
+#endif
+
+ flag_pcc_struct_return = 0;
+
+ if (flag_pic)
+ g_switch_value = 0;
+
+ /* The presence of the M extension implies that division instructions
+ are present, so include them unless explicitly disabled. */
+ if (TARGET_MUL && (target_flags_explicit & MASK_DIV) == 0)
+ target_flags |= MASK_DIV;
+ else if (!TARGET_MUL && TARGET_DIV)
+ error ("-mdiv requires -march to subsume the %<M%> extension");
+
+ /* Likewise floating-point division and square root. */
+ if (TARGET_HARD_FLOAT && (target_flags_explicit & MASK_FDIV) == 0)
+ target_flags |= MASK_FDIV;
+
+ /* Handle -mtune. */
+ cpu = riscv_parse_cpu (riscv_tune_string ? riscv_tune_string :
+ RISCV_TUNE_STRING_DEFAULT);
+ tune_info = optimize_size ? &optimize_size_tune_info : cpu->tune_info;
+
+ /* If the user hasn't specified a branch cost, use the processor's
+ default. */
+ if (riscv_branch_cost == 0)
+ riscv_branch_cost = tune_info->branch_cost;
+
+ /* Function to allocate machine-dependent function status. */
+ init_machine_status = &riscv_init_machine_status;
+
+ if (flag_pic)
+ riscv_cmodel = CM_PIC;
+
+ /* We get better code with explicit relocs for CM_MEDLOW, but
+ worse code for the others (for now). Pick the best default. */
+ if ((target_flags_explicit & MASK_EXPLICIT_RELOCS) == 0)
+ if (riscv_cmodel == CM_MEDLOW)
+ target_flags |= MASK_EXPLICIT_RELOCS;
+
+ /* Require that the ISA supports the requested floating-point ABI. */
+ if (UNITS_PER_FP_ARG > (TARGET_HARD_FLOAT ? UNITS_PER_FP_REG : 0))
+ error ("requested ABI requires -march to subsume the %qc extension",
+ UNITS_PER_FP_ARG > 8 ? 'Q' : (UNITS_PER_FP_ARG > 4 ? 'D' : 'F'));
+
+ /* We do not yet support ILP32 on RV64. */
+ if (BITS_PER_WORD != POINTER_SIZE)
+ error ("ABI requires -march=rv%d", POINTER_SIZE);
+}
+
+/* Implement TARGET_CONDITIONAL_REGISTER_USAGE. */
+
+static void
+riscv_conditional_register_usage (void)
+{
+ if (!TARGET_HARD_FLOAT)
+ {
+ for (int regno = FP_REG_FIRST; regno <= FP_REG_LAST; regno++)
+ fixed_regs[regno] = call_used_regs[regno] = 1;
+ }
+}
+
+/* Return a register priority for hard reg REGNO. */
+
+static int
+riscv_register_priority (int regno)
+{
+ /* Favor x8-x15/f8-f15 to improve the odds of RVC instruction selection. */
+ if (TARGET_RVC && (IN_RANGE (regno, GP_REG_FIRST + 8, GP_REG_FIRST + 15)
+ || IN_RANGE (regno, FP_REG_FIRST + 8, FP_REG_FIRST + 15)))
+ return 1;
+
+ return 0;
+}
+
+/* Implement TARGET_TRAMPOLINE_INIT. */
+
+static void
+riscv_trampoline_init (rtx m_tramp, tree fndecl, rtx chain_value)
+{
+ rtx addr, end_addr, mem;
+ uint32_t trampoline[4];
+ unsigned int i;
+ HOST_WIDE_INT static_chain_offset, target_function_offset;
+
+ /* Work out the offsets of the pointers from the start of the
+ trampoline code. */
+ gcc_assert (ARRAY_SIZE (trampoline) * 4 == TRAMPOLINE_CODE_SIZE);
+
+ /* Get pointers to the beginning and end of the code block. */
+ addr = force_reg (Pmode, XEXP (m_tramp, 0));
+ end_addr = riscv_force_binary (Pmode, PLUS, addr,
+ GEN_INT (TRAMPOLINE_CODE_SIZE));
+
+
+ if (Pmode == SImode)
+ {
+ chain_value = force_reg (Pmode, chain_value);
+
+ rtx target_function = force_reg (Pmode, XEXP (DECL_RTL (fndecl), 0));
+ /* lui t2, hi(chain)
+ lui t1, hi(func)
+ addi t2, t2, lo(chain)
+ jr r1, lo(func)
+ */
+ unsigned HOST_WIDE_INT lui_hi_chain_code, lui_hi_func_code;
+ unsigned HOST_WIDE_INT lo_chain_code, lo_func_code;
+
+ rtx uimm_mask = force_reg (SImode, gen_int_mode (-IMM_REACH, SImode));
+
+ /* 0xfff. */
+ rtx imm12_mask = gen_reg_rtx (SImode);
+ emit_insn (gen_one_cmplsi2 (imm12_mask, uimm_mask));
+
+ rtx fixup_value = force_reg (SImode, gen_int_mode (IMM_REACH/2, SImode));
+
+ /* Gen lui t2, hi(chain). */
+ rtx hi_chain = riscv_force_binary (SImode, PLUS, chain_value,
+ fixup_value);
+ hi_chain = riscv_force_binary (SImode, AND, hi_chain,
+ uimm_mask);
+ lui_hi_chain_code = OPCODE_LUI | (STATIC_CHAIN_REGNUM << SHIFT_RD);
+ rtx lui_hi_chain = riscv_force_binary (SImode, IOR, hi_chain,
+ gen_int_mode (lui_hi_chain_code, SImode));
+
+ mem = adjust_address (m_tramp, SImode, 0);
+ riscv_emit_move (mem, lui_hi_chain);
+
+ /* Gen lui t1, hi(func). */
+ rtx hi_func = riscv_force_binary (SImode, PLUS, target_function,
+ fixup_value);
+ hi_func = riscv_force_binary (SImode, AND, hi_func,
+ uimm_mask);
+ lui_hi_func_code = OPCODE_LUI | (RISCV_PROLOGUE_TEMP_REGNUM << SHIFT_RD);
+ rtx lui_hi_func = riscv_force_binary (SImode, IOR, hi_func,
+ gen_int_mode (lui_hi_func_code, SImode));
+
+ mem = adjust_address (m_tramp, SImode, 1 * GET_MODE_SIZE (SImode));
+ riscv_emit_move (mem, lui_hi_func);
+
+ /* Gen addi t2, t2, lo(chain). */
+ rtx lo_chain = riscv_force_binary (SImode, AND, chain_value,
+ imm12_mask);
+ lo_chain = riscv_force_binary (SImode, ASHIFT, lo_chain, GEN_INT (20));
+
+ lo_chain_code = OPCODE_ADDI
+ | (STATIC_CHAIN_REGNUM << SHIFT_RD)
+ | (STATIC_CHAIN_REGNUM << SHIFT_RS1);
+
+ rtx addi_lo_chain = riscv_force_binary (SImode, IOR, lo_chain,
+ force_reg (SImode, GEN_INT (lo_chain_code)));
+
+ mem = adjust_address (m_tramp, SImode, 2 * GET_MODE_SIZE (SImode));
+ riscv_emit_move (mem, addi_lo_chain);
+
+ /* Gen jr r1, lo(func). */
+ rtx lo_func = riscv_force_binary (SImode, AND, target_function,
+ imm12_mask);
+ lo_func = riscv_force_binary (SImode, ASHIFT, lo_func, GEN_INT (20));
+
+ lo_func_code = OPCODE_JALR | (RISCV_PROLOGUE_TEMP_REGNUM << SHIFT_RS1);
+
+ rtx jr_lo_func = riscv_force_binary (SImode, IOR, lo_func,
+ force_reg (SImode, GEN_INT (lo_func_code)));
+
+ mem = adjust_address (m_tramp, SImode, 3 * GET_MODE_SIZE (SImode));
+ riscv_emit_move (mem, jr_lo_func);
+ }
+ else
+ {
+ static_chain_offset = TRAMPOLINE_CODE_SIZE;
+ target_function_offset = static_chain_offset + GET_MODE_SIZE (ptr_mode);
+
+ /* auipc t2, 0
+ l[wd] t1, target_function_offset(t2)
+ l[wd] t2, static_chain_offset(t2)
+ jr t1
+ */
+ trampoline[0] = OPCODE_AUIPC | (STATIC_CHAIN_REGNUM << SHIFT_RD);
+ trampoline[1] = (Pmode == DImode ? OPCODE_LD : OPCODE_LW)
+ | (RISCV_PROLOGUE_TEMP_REGNUM << SHIFT_RD)
+ | (STATIC_CHAIN_REGNUM << SHIFT_RS1)
+ | (target_function_offset << SHIFT_IMM);
+ trampoline[2] = (Pmode == DImode ? OPCODE_LD : OPCODE_LW)
+ | (STATIC_CHAIN_REGNUM << SHIFT_RD)
+ | (STATIC_CHAIN_REGNUM << SHIFT_RS1)
+ | (static_chain_offset << SHIFT_IMM);
+ trampoline[3] = OPCODE_JALR | (RISCV_PROLOGUE_TEMP_REGNUM << SHIFT_RS1);
+
+ /* Copy the trampoline code. */
+ for (i = 0; i < ARRAY_SIZE (trampoline); i++)
+ {
+ mem = adjust_address (m_tramp, SImode, i * GET_MODE_SIZE (SImode));
+ riscv_emit_move (mem, gen_int_mode (trampoline[i], SImode));
+ }
+
+ /* Set up the static chain pointer field. */
+ mem = adjust_address (m_tramp, ptr_mode, static_chain_offset);
+ riscv_emit_move (mem, chain_value);
+
+ /* Set up the target function field. */
+ mem = adjust_address (m_tramp, ptr_mode, target_function_offset);
+ riscv_emit_move (mem, XEXP (DECL_RTL (fndecl), 0));
+ }
+
+ /* Flush the code part of the trampoline. */
+ emit_insn (gen_add3_insn (end_addr, addr, GEN_INT (TRAMPOLINE_SIZE)));
+ emit_insn (gen_clear_cache (addr, end_addr));
+}
+
+/* Return leaf_function_p () and memoize the result. */
+
+static bool
+riscv_leaf_function_p (void)
+{
+ if (cfun->machine->is_leaf == 0)
+ cfun->machine->is_leaf = leaf_function_p () ? 1 : -1;
+
+ return cfun->machine->is_leaf > 0;
+}
+
+/* Implement TARGET_FUNCTION_OK_FOR_SIBCALL. */
+
+static bool
+riscv_function_ok_for_sibcall (tree decl ATTRIBUTE_UNUSED,
+ tree exp ATTRIBUTE_UNUSED)
+{
+ /* When optimzing for size, don't use sibcalls in non-leaf routines */
+ if (TARGET_SAVE_RESTORE)
+ return riscv_leaf_function_p ();
+
+ return true;
+}
+
+/* Implement TARGET_CANNOT_COPY_INSN_P. */
+
+static bool
+riscv_cannot_copy_insn_p (rtx_insn *insn)
+{
+ return recog_memoized (insn) >= 0 && get_attr_cannot_copy (insn);
+}
+
+/* Initialize the GCC target structure. */
+#undef TARGET_ASM_ALIGNED_HI_OP
+#define TARGET_ASM_ALIGNED_HI_OP "\t.half\t"
+#undef TARGET_ASM_ALIGNED_SI_OP
+#define TARGET_ASM_ALIGNED_SI_OP "\t.word\t"
+#undef TARGET_ASM_ALIGNED_DI_OP
+#define TARGET_ASM_ALIGNED_DI_OP "\t.dword\t"
+
+#undef TARGET_OPTION_OVERRIDE
+#define TARGET_OPTION_OVERRIDE riscv_option_override
+
+#undef TARGET_LEGITIMIZE_ADDRESS
+#define TARGET_LEGITIMIZE_ADDRESS riscv_legitimize_address
+
+#undef TARGET_SCHED_ISSUE_RATE
+#define TARGET_SCHED_ISSUE_RATE riscv_issue_rate
+
+#undef TARGET_FUNCTION_OK_FOR_SIBCALL
+#define TARGET_FUNCTION_OK_FOR_SIBCALL riscv_function_ok_for_sibcall
+
+#undef TARGET_REGISTER_MOVE_COST
+#define TARGET_REGISTER_MOVE_COST riscv_register_move_cost
+#undef TARGET_MEMORY_MOVE_COST
+#define TARGET_MEMORY_MOVE_COST riscv_memory_move_cost
+#undef TARGET_RTX_COSTS
+#define TARGET_RTX_COSTS riscv_rtx_costs
+#undef TARGET_ADDRESS_COST
+#define TARGET_ADDRESS_COST riscv_address_cost
+
+#undef TARGET_ASM_FILE_START
+#define TARGET_ASM_FILE_START riscv_file_start
+#undef TARGET_ASM_FILE_START_FILE_DIRECTIVE
+#define TARGET_ASM_FILE_START_FILE_DIRECTIVE true
+
+#undef TARGET_EXPAND_BUILTIN_VA_START
+#define TARGET_EXPAND_BUILTIN_VA_START riscv_va_start
+
+#undef TARGET_PROMOTE_FUNCTION_MODE
+#define TARGET_PROMOTE_FUNCTION_MODE default_promote_function_mode_always_promote
+
+#undef TARGET_RETURN_IN_MEMORY
+#define TARGET_RETURN_IN_MEMORY riscv_return_in_memory
+
+#undef TARGET_ASM_OUTPUT_MI_THUNK
+#define TARGET_ASM_OUTPUT_MI_THUNK riscv_output_mi_thunk
+#undef TARGET_ASM_CAN_OUTPUT_MI_THUNK
+#define TARGET_ASM_CAN_OUTPUT_MI_THUNK hook_bool_const_tree_hwi_hwi_const_tree_true
+
+#undef TARGET_PRINT_OPERAND
+#define TARGET_PRINT_OPERAND riscv_print_operand
+#undef TARGET_PRINT_OPERAND_ADDRESS
+#define TARGET_PRINT_OPERAND_ADDRESS riscv_print_operand_address
+
+#undef TARGET_SETUP_INCOMING_VARARGS
+#define TARGET_SETUP_INCOMING_VARARGS riscv_setup_incoming_varargs
+#undef TARGET_STRICT_ARGUMENT_NAMING
+#define TARGET_STRICT_ARGUMENT_NAMING hook_bool_CUMULATIVE_ARGS_true
+#undef TARGET_MUST_PASS_IN_STACK
+#define TARGET_MUST_PASS_IN_STACK must_pass_in_stack_var_size
+#undef TARGET_PASS_BY_REFERENCE
+#define TARGET_PASS_BY_REFERENCE riscv_pass_by_reference
+#undef TARGET_ARG_PARTIAL_BYTES
+#define TARGET_ARG_PARTIAL_BYTES riscv_arg_partial_bytes
+#undef TARGET_FUNCTION_ARG
+#define TARGET_FUNCTION_ARG riscv_function_arg
+#undef TARGET_FUNCTION_ARG_ADVANCE
+#define TARGET_FUNCTION_ARG_ADVANCE riscv_function_arg_advance
+#undef TARGET_FUNCTION_ARG_BOUNDARY
+#define TARGET_FUNCTION_ARG_BOUNDARY riscv_function_arg_boundary
+
+/* The generic ELF target does not always have TLS support. */
+#ifdef HAVE_AS_TLS
+#undef TARGET_HAVE_TLS
+#define TARGET_HAVE_TLS true
+#endif
+
+#undef TARGET_CANNOT_FORCE_CONST_MEM
+#define TARGET_CANNOT_FORCE_CONST_MEM riscv_cannot_force_const_mem
+
+#undef TARGET_LEGITIMATE_CONSTANT_P
+#define TARGET_LEGITIMATE_CONSTANT_P riscv_legitimate_constant_p
+
+#undef TARGET_USE_BLOCKS_FOR_CONSTANT_P
+#define TARGET_USE_BLOCKS_FOR_CONSTANT_P hook_bool_mode_const_rtx_true
+
+#undef TARGET_LEGITIMATE_ADDRESS_P
+#define TARGET_LEGITIMATE_ADDRESS_P riscv_legitimate_address_p
+
+#undef TARGET_CAN_ELIMINATE
+#define TARGET_CAN_ELIMINATE riscv_can_eliminate
+
+#undef TARGET_CONDITIONAL_REGISTER_USAGE
+#define TARGET_CONDITIONAL_REGISTER_USAGE riscv_conditional_register_usage
+
+#undef TARGET_CLASS_MAX_NREGS
+#define TARGET_CLASS_MAX_NREGS riscv_class_max_nregs
+
+#undef TARGET_TRAMPOLINE_INIT
+#define TARGET_TRAMPOLINE_INIT riscv_trampoline_init
+
+#undef TARGET_IN_SMALL_DATA_P
+#define TARGET_IN_SMALL_DATA_P riscv_in_small_data_p
+
+#undef TARGET_ASM_SELECT_RTX_SECTION
+#define TARGET_ASM_SELECT_RTX_SECTION riscv_elf_select_rtx_section
+
+#undef TARGET_MIN_ANCHOR_OFFSET
+#define TARGET_MIN_ANCHOR_OFFSET (-IMM_REACH/2)
+
+#undef TARGET_MAX_ANCHOR_OFFSET
+#define TARGET_MAX_ANCHOR_OFFSET (IMM_REACH/2-1)
+
+#undef TARGET_REGISTER_PRIORITY
+#define TARGET_REGISTER_PRIORITY riscv_register_priority
+
+#undef TARGET_CANNOT_COPY_INSN_P
+#define TARGET_CANNOT_COPY_INSN_P riscv_cannot_copy_insn_p
+
+#undef TARGET_ATOMIC_ASSIGN_EXPAND_FENV
+#define TARGET_ATOMIC_ASSIGN_EXPAND_FENV riscv_atomic_assign_expand_fenv
+
+#undef TARGET_INIT_BUILTINS
+#define TARGET_INIT_BUILTINS riscv_init_builtins
+
+#undef TARGET_BUILTIN_DECL
+#define TARGET_BUILTIN_DECL riscv_builtin_decl
+
+#undef TARGET_EXPAND_BUILTIN
+#define TARGET_EXPAND_BUILTIN riscv_expand_builtin
+
+struct gcc_target targetm = TARGET_INITIALIZER;
+
+#include "gt-riscv.h"
diff --git a/gcc/config/riscv/riscv.h b/gcc/config/riscv/riscv.h
new file mode 100644
index 0000000..8d4c75e
--- /dev/null
+++ b/gcc/config/riscv/riscv.h
@@ -0,0 +1,906 @@
+/* Definition of RISC-V target for GNU compiler.
+ Copyright (C) 2011-2017 Free Software Foundation, Inc.
+ Contributed by Andrew Waterman (andrew@sifive.com).
+ Based on MIPS target for GNU compiler.
+
+This file is part of GCC.
+
+GCC is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 3, or (at your option)
+any later version.
+
+GCC is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GCC; see the file COPYING3. If not see
+<http://www.gnu.org/licenses/>. */
+
+#ifndef GCC_RISCV_H
+#define GCC_RISCV_H
+
+#include "config/riscv/riscv-opts.h"
+
+/* Target CPU builtins. */
+#define TARGET_CPU_CPP_BUILTINS() riscv_cpu_cpp_builtins (pfile)
+
+/* Default target_flags if no switches are specified */
+
+#ifndef TARGET_DEFAULT
+#define TARGET_DEFAULT 0
+#endif
+
+#ifndef RISCV_TUNE_STRING_DEFAULT
+#define RISCV_TUNE_STRING_DEFAULT "rocket"
+#endif
+
+/* Support for a compile-time default CPU, et cetera. The rules are:
+ --with-arch is ignored if -march is specified.
+ --with-abi is ignored if -mabi is specified.
+ --with-tune is ignored if -mtune is specified. */
+#define OPTION_DEFAULT_SPECS \
+ {"tune", "%{!mtune=*:-mtune=%(VALUE)}" }, \
+ {"arch", "%{!march=*:-march=%(VALUE)}" }, \
+ {"abi", "%{!mabi=*:-mabi=%(VALUE)}" }, \
+
+#ifdef IN_LIBGCC2
+#undef TARGET_64BIT
+/* Make this compile time constant for libgcc2 */
+#define TARGET_64BIT (__riscv_xlen == 64)
+#endif /* IN_LIBGCC2 */
+
+#undef ASM_SPEC
+#define ASM_SPEC "\
+%(subtarget_asm_debugging_spec) \
+%{" FPIE_OR_FPIC_SPEC ":-fpic} \
+%{march=*} \
+%{mabi=*} \
+%(subtarget_asm_spec)"
+
+#define TARGET_DEFAULT_CMODEL CM_MEDLOW
+
+#define LOCAL_LABEL_PREFIX "."
+#define USER_LABEL_PREFIX ""
+
+/* Offsets recorded in opcodes are a multiple of this alignment factor.
+ The default for this in 64-bit mode is 8, which causes problems with
+ SFmode register saves. */
+#define DWARF_CIE_DATA_ALIGNMENT -4
+
+/* The mapping from gcc register number to DWARF 2 CFA column number. */
+#define DWARF_FRAME_REGNUM(REGNO) \
+ (GP_REG_P (REGNO) || FP_REG_P (REGNO) ? REGNO : INVALID_REGNUM)
+
+/* The DWARF 2 CFA column which tracks the return address. */
+#define DWARF_FRAME_RETURN_COLUMN RETURN_ADDR_REGNUM
+#define INCOMING_RETURN_ADDR_RTX gen_rtx_REG (VOIDmode, RETURN_ADDR_REGNUM)
+
+/* Describe how we implement __builtin_eh_return. */
+#define EH_RETURN_DATA_REGNO(N) \
+ ((N) < 4 ? (N) + GP_ARG_FIRST : INVALID_REGNUM)
+
+#define EH_RETURN_STACKADJ_RTX gen_rtx_REG (Pmode, GP_ARG_FIRST + 4)
+
+/* Target machine storage layout */
+
+#define BITS_BIG_ENDIAN 0
+#define BYTES_BIG_ENDIAN 0
+#define WORDS_BIG_ENDIAN 0
+
+#define MAX_BITS_PER_WORD 64
+
+/* Width of a word, in units (bytes). */
+#define UNITS_PER_WORD (TARGET_64BIT ? 8 : 4)
+#ifndef IN_LIBGCC2
+#define MIN_UNITS_PER_WORD 4
+#endif
+
+/* The `Q' extension is not yet supported. */
+#define UNITS_PER_FP_REG (TARGET_DOUBLE_FLOAT ? 8 : 4)
+
+/* The largest type that can be passed in floating-point registers. */
+#define UNITS_PER_FP_ARG \
+ (riscv_abi == ABI_ILP32 || riscv_abi == ABI_LP64 ? 0 : \
+ riscv_abi == ABI_ILP32F || riscv_abi == ABI_LP64F ? 4 : 8) \
+
+/* Set the sizes of the core types. */
+#define SHORT_TYPE_SIZE 16
+#define INT_TYPE_SIZE 32
+#define LONG_LONG_TYPE_SIZE 64
+#define POINTER_SIZE (riscv_abi >= ABI_LP64 ? 64 : 32)
+#define LONG_TYPE_SIZE POINTER_SIZE
+
+#define FLOAT_TYPE_SIZE 32
+#define DOUBLE_TYPE_SIZE 64
+#define LONG_DOUBLE_TYPE_SIZE 128
+
+/* Allocation boundary (in *bits*) for storing arguments in argument list. */
+#define PARM_BOUNDARY BITS_PER_WORD
+
+/* Allocation boundary (in *bits*) for the code of a function. */
+#define FUNCTION_BOUNDARY (TARGET_RVC ? 16 : 32)
+
+/* There is no point aligning anything to a rounder boundary than this. */
+#define BIGGEST_ALIGNMENT 128
+
+/* The user-level ISA permits misaligned accesses, but they may execute
+ extremely slowly and non-atomically. Some privileged architectures
+ do not permit them at all. It is best to enforce strict alignment. */
+#define STRICT_ALIGNMENT 1
+
+/* Define this if you wish to imitate the way many other C compilers
+ handle alignment of bitfields and the structures that contain
+ them.
+
+ The behavior is that the type written for a bit-field (`int',
+ `short', or other integer type) imposes an alignment for the
+ entire structure, as if the structure really did contain an
+ ordinary field of that type. In addition, the bit-field is placed
+ within the structure so that it would fit within such a field,
+ not crossing a boundary for it.
+
+ Thus, on most machines, a bit-field whose type is written as `int'
+ would not cross a four-byte boundary, and would force four-byte
+ alignment for the whole structure. (The alignment used may not
+ be four bytes; it is controlled by the other alignment
+ parameters.)
+
+ If the macro is defined, its definition should be a C expression;
+ a nonzero value for the expression enables this behavior. */
+
+#define PCC_BITFIELD_TYPE_MATTERS 1
+
+/* If defined, a C expression to compute the alignment given to a
+ constant that is being placed in memory. CONSTANT is the constant
+ and ALIGN is the alignment that the object would ordinarily have.
+ The value of this macro is used instead of that alignment to align
+ the object.
+
+ If this macro is not defined, then ALIGN is used.
+
+ The typical use of this macro is to increase alignment for string
+ constants to be word aligned so that `strcpy' calls that copy
+ constants can be done inline. */
+
+#define CONSTANT_ALIGNMENT(EXP, ALIGN) \
+ ((TREE_CODE (EXP) == STRING_CST || TREE_CODE (EXP) == CONSTRUCTOR) \
+ && (ALIGN) < BITS_PER_WORD ? BITS_PER_WORD : (ALIGN))
+
+/* If defined, a C expression to compute the alignment for a static
+ variable. TYPE is the data type, and ALIGN is the alignment that
+ the object would ordinarily have. The value of this macro is used
+ instead of that alignment to align the object.
+
+ If this macro is not defined, then ALIGN is used.
+
+ One use of this macro is to increase alignment of medium-size
+ data to make it all fit in fewer cache lines. Another is to
+ cause character arrays to be word-aligned so that `strcpy' calls
+ that copy constants to character arrays can be done inline. */
+
+#define DATA_ALIGNMENT(TYPE, ALIGN) \
+ ((((ALIGN) < BITS_PER_WORD) \
+ && (TREE_CODE (TYPE) == ARRAY_TYPE \
+ || TREE_CODE (TYPE) == UNION_TYPE \
+ || TREE_CODE (TYPE) == RECORD_TYPE)) ? BITS_PER_WORD : (ALIGN))
+
+/* We need this for the same reason as DATA_ALIGNMENT, namely to cause
+ character arrays to be word-aligned so that `strcpy' calls that copy
+ constants to character arrays can be done inline, and 'strcmp' can be
+ optimised to use word loads. */
+#define LOCAL_ALIGNMENT(TYPE, ALIGN) \
+ DATA_ALIGNMENT (TYPE, ALIGN)
+
+/* Define if operations between registers always perform the operation
+ on the full register even if a narrower mode is specified. */
+#define WORD_REGISTER_OPERATIONS 1
+
+/* When in 64-bit mode, move insns will sign extend SImode and CCmode
+ moves. All other references are zero extended. */
+#define LOAD_EXTEND_OP(MODE) \
+ (TARGET_64BIT && (MODE) == SImode ? SIGN_EXTEND : ZERO_EXTEND)
+
+/* Define this macro if it is advisable to hold scalars in registers
+ in a wider mode than that declared by the program. In such cases,
+ the value is constrained to be within the bounds of the declared
+ type, but kept valid in the wider mode. The signedness of the
+ extension may differ from that of the type. */
+
+#define PROMOTE_MODE(MODE, UNSIGNEDP, TYPE) \
+ if (GET_MODE_CLASS (MODE) == MODE_INT \
+ && GET_MODE_SIZE (MODE) < UNITS_PER_WORD) \
+ { \
+ if ((MODE) == SImode) \
+ (UNSIGNEDP) = 0; \
+ (MODE) = word_mode; \
+ }
+
+/* Pmode is always the same as ptr_mode, but not always the same as word_mode.
+ Extensions of pointers to word_mode must be signed. */
+#define POINTERS_EXTEND_UNSIGNED false
+
+/* When floating-point registers are wider than integer ones, moves between
+ them must go through memory. */
+#define SECONDARY_MEMORY_NEEDED(CLASS1,CLASS2,MODE) \
+ (GET_MODE_SIZE (MODE) > UNITS_PER_WORD \
+ && ((CLASS1) == FP_REGS) != ((CLASS2) == FP_REGS))
+
+/* Define if loading short immediate values into registers sign extends. */
+#define SHORT_IMMEDIATES_SIGN_EXTEND 1
+
+/* Standard register usage. */
+
+/* Number of hardware registers. We have:
+
+ - 32 integer registers
+ - 32 floating point registers
+ - 2 fake registers:
+ - ARG_POINTER_REGNUM
+ - FRAME_POINTER_REGNUM */
+
+#define FIRST_PSEUDO_REGISTER 66
+
+/* x0, sp, gp, and tp are fixed. */
+
+#define FIXED_REGISTERS \
+{ /* General registers. */ \
+ 1, 0, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
+ /* Floating-point registers. */ \
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
+ /* Others. */ \
+ 1, 1 \
+}
+
+/* a0-a7, t0-a6, fa0-fa7, and ft0-ft11 are volatile across calls.
+ The call RTLs themselves clobber ra. */
+
+#define CALL_USED_REGISTERS \
+{ /* General registers. */ \
+ 1, 0, 1, 1, 1, 1, 1, 1, 0, 0, 1, 1, 1, 1, 1, 1, \
+ 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, \
+ /* Floating-point registers. */ \
+ 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 1, 1, 1, 1, 1, 1, \
+ 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, \
+ /* Others. */ \
+ 1, 1 \
+}
+
+/* Internal macros to classify an ISA register's type. */
+
+#define GP_REG_FIRST 0
+#define GP_REG_LAST 31
+#define GP_REG_NUM (GP_REG_LAST - GP_REG_FIRST + 1)
+
+#define FP_REG_FIRST 32
+#define FP_REG_LAST 63
+#define FP_REG_NUM (FP_REG_LAST - FP_REG_FIRST + 1)
+
+/* The DWARF 2 CFA column which tracks the return address from a
+ signal handler context. This means that to maintain backwards
+ compatibility, no hard register can be assigned this column if it
+ would need to be handled by the DWARF unwinder. */
+#define DWARF_ALT_FRAME_RETURN_COLUMN 64
+
+#define GP_REG_P(REGNO) \
+ ((unsigned int) ((int) (REGNO) - GP_REG_FIRST) < GP_REG_NUM)
+#define FP_REG_P(REGNO) \
+ ((unsigned int) ((int) (REGNO) - FP_REG_FIRST) < FP_REG_NUM)
+
+#define FP_REG_RTX_P(X) (REG_P (X) && FP_REG_P (REGNO (X)))
+
+#define HARD_REGNO_NREGS(REGNO, MODE) riscv_hard_regno_nregs (REGNO, MODE)
+
+#define HARD_REGNO_MODE_OK(REGNO, MODE) \
+ riscv_hard_regno_mode_ok_p (REGNO, MODE)
+
+/* Don't allow floating-point modes to be tied, since type punning of
+ single-precision and double-precision is implementation defined. */
+#define MODES_TIEABLE_P(MODE1, MODE2) \
+ ((MODE1) == (MODE2) \
+ || !(GET_MODE_CLASS (MODE1) == MODE_FLOAT \
+ && GET_MODE_CLASS (MODE2) == MODE_FLOAT))
+
+/* Use s0 as the frame pointer if it is so requested. */
+#define HARD_FRAME_POINTER_REGNUM 8
+#define STACK_POINTER_REGNUM 2
+#define THREAD_POINTER_REGNUM 4
+
+/* These two registers don't really exist: they get eliminated to either
+ the stack or hard frame pointer. */
+#define ARG_POINTER_REGNUM 64
+#define FRAME_POINTER_REGNUM 65
+
+/* Register in which static-chain is passed to a function. */
+#define STATIC_CHAIN_REGNUM (GP_TEMP_FIRST + 2)
+
+/* Registers used as temporaries in prologue/epilogue code.
+
+ The prologue registers mustn't conflict with any
+ incoming arguments, the static chain pointer, or the frame pointer.
+ The epilogue temporary mustn't conflict with the return registers,
+ the frame pointer, the EH stack adjustment, or the EH data registers. */
+
+#define RISCV_PROLOGUE_TEMP_REGNUM (GP_TEMP_FIRST + 1)
+#define RISCV_PROLOGUE_TEMP(MODE) gen_rtx_REG (MODE, RISCV_PROLOGUE_TEMP_REGNUM)
+
+#define MCOUNT_NAME "_mcount"
+
+#define NO_PROFILE_COUNTERS 1
+
+/* Emit rtl for profiling. Output assembler code to FILE
+ to call "_mcount" for profiling a function entry. */
+#define PROFILE_HOOK(LABEL) \
+ { \
+ rtx fun, ra; \
+ ra = get_hard_reg_initial_val (Pmode, RETURN_ADDR_REGNUM); \
+ fun = gen_rtx_SYMBOL_REF (Pmode, MCOUNT_NAME); \
+ emit_library_call (fun, LCT_NORMAL, VOIDmode, 1, ra, Pmode); \
+ }
+
+/* All the work done in PROFILE_HOOK, but still required. */
+#define FUNCTION_PROFILER(STREAM, LABELNO) do { } while (0)
+
+/* Define this macro if it is as good or better to call a constant
+ function address than to call an address kept in a register. */
+#define NO_FUNCTION_CSE 1
+
+/* Define the classes of registers for register constraints in the
+ machine description. Also define ranges of constants.
+
+ One of the classes must always be named ALL_REGS and include all hard regs.
+ If there is more than one class, another class must be named NO_REGS
+ and contain no registers.
+
+ The name GENERAL_REGS must be the name of a class (or an alias for
+ another name such as ALL_REGS). This is the class of registers
+ that is allowed by "g" or "r" in a register constraint.
+ Also, registers outside this class are allocated only when
+ instructions express preferences for them.
+
+ The classes must be numbered in nondecreasing order; that is,
+ a larger-numbered class must never be contained completely
+ in a smaller-numbered class.
+
+ For any two classes, it is very desirable that there be another
+ class that represents their union. */
+
+enum reg_class
+{
+ NO_REGS, /* no registers in set */
+ SIBCALL_REGS, /* registers used by indirect sibcalls */
+ JALR_REGS, /* registers used by indirect calls */
+ GR_REGS, /* integer registers */
+ FP_REGS, /* floating-point registers */
+ FRAME_REGS, /* arg pointer and frame pointer */
+ ALL_REGS, /* all registers */
+ LIM_REG_CLASSES /* max value + 1 */
+};
+
+#define N_REG_CLASSES (int) LIM_REG_CLASSES
+
+#define GENERAL_REGS GR_REGS
+
+/* An initializer containing the names of the register classes as C
+ string constants. These names are used in writing some of the
+ debugging dumps. */
+
+#define REG_CLASS_NAMES \
+{ \
+ "NO_REGS", \
+ "SIBCALL_REGS", \
+ "JALR_REGS", \
+ "GR_REGS", \
+ "FP_REGS", \
+ "FRAME_REGS", \
+ "ALL_REGS" \
+}
+
+/* An initializer containing the contents of the register classes,
+ as integers which are bit masks. The Nth integer specifies the
+ contents of class N. The way the integer MASK is interpreted is
+ that register R is in the class if `MASK & (1 << R)' is 1.
+
+ When the machine has more than 32 registers, an integer does not
+ suffice. Then the integers are replaced by sub-initializers,
+ braced groupings containing several integers. Each
+ sub-initializer must be suitable as an initializer for the type
+ `HARD_REG_SET' which is defined in `hard-reg-set.h'. */
+
+#define REG_CLASS_CONTENTS \
+{ \
+ { 0x00000000, 0x00000000, 0x00000000 }, /* NO_REGS */ \
+ { 0xf00000c0, 0x00000000, 0x00000000 }, /* SIBCALL_REGS */ \
+ { 0xffffffc0, 0x00000000, 0x00000000 }, /* JALR_REGS */ \
+ { 0xffffffff, 0x00000000, 0x00000000 }, /* GR_REGS */ \
+ { 0x00000000, 0xffffffff, 0x00000000 }, /* FP_REGS */ \
+ { 0x00000000, 0x00000000, 0x00000003 }, /* FRAME_REGS */ \
+ { 0xffffffff, 0xffffffff, 0x00000003 } /* ALL_REGS */ \
+}
+
+/* A C expression whose value is a register class containing hard
+ register REGNO. In general there is more that one such class;
+ choose a class which is "minimal", meaning that no smaller class
+ also contains the register. */
+
+#define REGNO_REG_CLASS(REGNO) riscv_regno_to_class[ (REGNO) ]
+
+/* A macro whose definition is the name of the class to which a
+ valid base register must belong. A base register is one used in
+ an address which is the register value plus a displacement. */
+
+#define BASE_REG_CLASS GR_REGS
+
+/* A macro whose definition is the name of the class to which a
+ valid index register must belong. An index register is one used
+ in an address where its value is either multiplied by a scale
+ factor or added to another register (as well as added to a
+ displacement). */
+
+#define INDEX_REG_CLASS NO_REGS
+
+/* We generally want to put call-clobbered registers ahead of
+ call-saved ones. (IRA expects this.) */
+
+#define REG_ALLOC_ORDER \
+{ \
+ /* Call-clobbered GPRs. */ \
+ 15, 14, 13, 12, 11, 10, 16, 17, 6, 28, 29, 30, 31, 5, 7, 1, \
+ /* Call-saved GPRs. */ \
+ 8, 9, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, \
+ /* GPRs that can never be exposed to the register allocator. */ \
+ 0, 2, 3, 4, \
+ /* Call-clobbered FPRs. */ \
+ 47, 46, 45, 44, 43, 42, 32, 33, 34, 35, 36, 37, 38, 39, 48, 49, \
+ 60, 61, 62, 63, \
+ /* Call-saved FPRs. */ \
+ 40, 41, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, \
+ /* None of the remaining classes have defined call-saved \
+ registers. */ \
+ 64, 65 \
+}
+
+/* True if VALUE is a signed 12-bit number. */
+
+#define SMALL_OPERAND(VALUE) \
+ ((unsigned HOST_WIDE_INT) (VALUE) + IMM_REACH/2 < IMM_REACH)
+
+/* True if VALUE can be loaded into a register using LUI. */
+
+#define LUI_OPERAND(VALUE) \
+ (((VALUE) | ((1UL<<31) - IMM_REACH)) == ((1UL<<31) - IMM_REACH) \
+ || ((VALUE) | ((1UL<<31) - IMM_REACH)) + IMM_REACH == 0)
+
+#define CANNOT_CHANGE_MODE_CLASS(FROM, TO, CLASS) \
+ reg_classes_intersect_p (FP_REGS, CLASS)
+
+/* Stack layout; function entry, exit and calling. */
+
+#define STACK_GROWS_DOWNWARD 1
+
+#define FRAME_GROWS_DOWNWARD 1
+
+#define STARTING_FRAME_OFFSET 0
+
+#define RETURN_ADDR_RTX riscv_return_addr
+
+#define ELIMINABLE_REGS \
+{{ ARG_POINTER_REGNUM, STACK_POINTER_REGNUM}, \
+ { ARG_POINTER_REGNUM, HARD_FRAME_POINTER_REGNUM}, \
+ { FRAME_POINTER_REGNUM, STACK_POINTER_REGNUM}, \
+ { FRAME_POINTER_REGNUM, HARD_FRAME_POINTER_REGNUM}} \
+
+#define INITIAL_ELIMINATION_OFFSET(FROM, TO, OFFSET) \
+ (OFFSET) = riscv_initial_elimination_offset (FROM, TO)
+
+/* Allocate stack space for arguments at the beginning of each function. */
+#define ACCUMULATE_OUTGOING_ARGS 1
+
+/* The argument pointer always points to the first argument. */
+#define FIRST_PARM_OFFSET(FNDECL) 0
+
+#define REG_PARM_STACK_SPACE(FNDECL) 0
+
+/* Define this if it is the responsibility of the caller to
+ allocate the area reserved for arguments passed in registers.
+ If `ACCUMULATE_OUTGOING_ARGS' is also defined, the only effect
+ of this macro is to determine whether the space is included in
+ `crtl->outgoing_args_size'. */
+#define OUTGOING_REG_PARM_STACK_SPACE(FNTYPE) 1
+
+#define STACK_BOUNDARY 128
+
+/* Symbolic macros for the registers used to return integer and floating
+ point values. */
+
+#define GP_RETURN GP_ARG_FIRST
+#define FP_RETURN (UNITS_PER_FP_ARG == 0 ? GP_RETURN : FP_ARG_FIRST)
+
+#define MAX_ARGS_IN_REGISTERS 8
+
+/* Symbolic macros for the first/last argument registers. */
+
+#define GP_ARG_FIRST (GP_REG_FIRST + 10)
+#define GP_ARG_LAST (GP_ARG_FIRST + MAX_ARGS_IN_REGISTERS - 1)
+#define GP_TEMP_FIRST (GP_REG_FIRST + 5)
+#define FP_ARG_FIRST (FP_REG_FIRST + 10)
+#define FP_ARG_LAST (FP_ARG_FIRST + MAX_ARGS_IN_REGISTERS - 1)
+
+#define CALLEE_SAVED_REG_NUMBER(REGNO) \
+ ((REGNO) >= 8 && (REGNO) <= 9 ? (REGNO) - 8 : \
+ (REGNO) >= 18 && (REGNO) <= 27 ? (REGNO) - 16 : -1)
+
+#define LIBCALL_VALUE(MODE) \
+ riscv_function_value (NULL_TREE, NULL_TREE, MODE)
+
+#define FUNCTION_VALUE(VALTYPE, FUNC) \
+ riscv_function_value (VALTYPE, FUNC, VOIDmode)
+
+#define FUNCTION_VALUE_REGNO_P(N) ((N) == GP_RETURN || (N) == FP_RETURN)
+
+/* 1 if N is a possible register number for function argument passing.
+ We have no FP argument registers when soft-float. When FP registers
+ are 32 bits, we can't directly reference the odd numbered ones. */
+
+/* Accept arguments in a0-a7, and in fa0-fa7 if permitted by the ABI. */
+#define FUNCTION_ARG_REGNO_P(N) \
+ (IN_RANGE ((N), GP_ARG_FIRST, GP_ARG_LAST) \
+ || (UNITS_PER_FP_ARG && IN_RANGE ((N), FP_ARG_FIRST, FP_ARG_LAST)))
+
+typedef struct {
+ /* Number of integer registers used so far, up to MAX_ARGS_IN_REGISTERS. */
+ unsigned int num_gprs;
+
+ /* Number of floating-point registers used so far, likewise. */
+ unsigned int num_fprs;
+} CUMULATIVE_ARGS;
+
+/* Initialize a variable CUM of type CUMULATIVE_ARGS
+ for a call to a function whose data type is FNTYPE.
+ For a library call, FNTYPE is 0. */
+
+#define INIT_CUMULATIVE_ARGS(CUM, FNTYPE, LIBNAME, INDIRECT, N_NAMED_ARGS) \
+ memset (&(CUM), 0, sizeof (CUM))
+
+#define EPILOGUE_USES(REGNO) ((REGNO) == RETURN_ADDR_REGNUM)
+
+/* ABI requires 16-byte alignment, even on RV32. */
+#define RISCV_STACK_ALIGN(LOC) (((LOC) + 15) & -16)
+
+/* EXIT_IGNORE_STACK should be nonzero if, when returning from a function,
+ the stack pointer does not matter. The value is tested only in
+ functions that have frame pointers.
+ No definition is equivalent to always zero. */
+
+#define EXIT_IGNORE_STACK 1
+
+
+/* Trampolines are a block of code followed by two pointers. */
+
+#define TRAMPOLINE_CODE_SIZE 16
+#define TRAMPOLINE_SIZE \
+ ((Pmode == SImode) \
+ ? TRAMPOLINE_CODE_SIZE \
+ : (TRAMPOLINE_CODE_SIZE + POINTER_SIZE * 2))
+#define TRAMPOLINE_ALIGNMENT POINTER_SIZE
+
+/* Addressing modes, and classification of registers for them. */
+
+#define REGNO_OK_FOR_INDEX_P(REGNO) 0
+#define REGNO_MODE_OK_FOR_BASE_P(REGNO, MODE) \
+ riscv_regno_mode_ok_for_base_p (REGNO, MODE, 1)
+
+/* The macros REG_OK_FOR..._P assume that the arg is a REG rtx
+ and check its validity for a certain class.
+ We have two alternate definitions for each of them.
+ The usual definition accepts all pseudo regs; the other rejects them all.
+ The symbol REG_OK_STRICT causes the latter definition to be used.
+
+ Most source files want to accept pseudo regs in the hope that
+ they will get allocated to the class that the insn wants them to be in.
+ Some source files that are used after register allocation
+ need to be strict. */
+
+#ifndef REG_OK_STRICT
+#define REG_MODE_OK_FOR_BASE_P(X, MODE) \
+ riscv_regno_mode_ok_for_base_p (REGNO (X), MODE, 0)
+#else
+#define REG_MODE_OK_FOR_BASE_P(X, MODE) \
+ riscv_regno_mode_ok_for_base_p (REGNO (X), MODE, 1)
+#endif
+
+#define REG_OK_FOR_INDEX_P(X) 0
+
+/* Maximum number of registers that can appear in a valid memory address. */
+
+#define MAX_REGS_PER_ADDRESS 1
+
+#define CONSTANT_ADDRESS_P(X) \
+ (CONSTANT_P (X) && memory_address_p (SImode, X))
+
+/* This handles the magic '..CURRENT_FUNCTION' symbol, which means
+ 'the start of the function that this code is output in'. */
+
+#define ASM_OUTPUT_LABELREF(FILE,NAME) \
+ if (strcmp (NAME, "..CURRENT_FUNCTION") == 0) \
+ asm_fprintf ((FILE), "%U%s", \
+ XSTR (XEXP (DECL_RTL (current_function_decl), 0), 0)); \
+ else \
+ asm_fprintf ((FILE), "%U%s", (NAME))
+
+#define JUMP_TABLES_IN_TEXT_SECTION 0
+#define CASE_VECTOR_MODE SImode
+#define CASE_VECTOR_PC_RELATIVE (riscv_cmodel != CM_MEDLOW)
+
+/* The load-address macro is used for PC-relative addressing of symbols
+ that bind locally. Don't use it for symbols that should be addressed
+ via the GOT. Also, avoid it for CM_MEDLOW, where LUI addressing
+ currently results in more opportunities for linker relaxation. */
+#define USE_LOAD_ADDRESS_MACRO(sym) \
+ (!TARGET_EXPLICIT_RELOCS && \
+ ((flag_pic \
+ && ((SYMBOL_REF_P (sym) && SYMBOL_REF_LOCAL_P (sym)) \
+ || ((GET_CODE (sym) == CONST) \
+ && SYMBOL_REF_P (XEXP (XEXP (sym, 0),0)) \
+ && SYMBOL_REF_LOCAL_P (XEXP (XEXP (sym, 0),0))))) \
+ || riscv_cmodel == CM_MEDANY))
+
+/* Define this as 1 if `char' should by default be signed; else as 0. */
+#define DEFAULT_SIGNED_CHAR 0
+
+#define MOVE_MAX UNITS_PER_WORD
+#define MAX_MOVE_MAX 8
+
+#define SLOW_BYTE_ACCESS 0
+
+#define SHIFT_COUNT_TRUNCATED 1
+
+#define TRULY_NOOP_TRUNCATION(OUTPREC, INPREC) 1
+
+/* Specify the machine mode that pointers have.
+ After generation of rtl, the compiler makes no further distinction
+ between pointers and any other objects of this machine mode. */
+
+#define Pmode word_mode
+
+/* Give call MEMs SImode since it is the "most permissive" mode
+ for both 32-bit and 64-bit targets. */
+
+#define FUNCTION_MODE SImode
+
+/* A C expression for the cost of a branch instruction. A value of 2
+ seems to minimize code size. */
+
+#define BRANCH_COST(speed_p, predictable_p) \
+ ((!(speed_p) || (predictable_p)) ? 2 : riscv_branch_cost)
+
+#define LOGICAL_OP_NON_SHORT_CIRCUIT 0
+
+/* Control the assembler format that we output. */
+
+/* Output to assembler file text saying following lines
+ may contain character constants, extra white space, comments, etc. */
+
+#ifndef ASM_APP_ON
+#define ASM_APP_ON " #APP\n"
+#endif
+
+/* Output to assembler file text saying following lines
+ no longer contain unusual constructs. */
+
+#ifndef ASM_APP_OFF
+#define ASM_APP_OFF " #NO_APP\n"
+#endif
+
+#define REGISTER_NAMES \
+{ "zero","ra", "sp", "gp", "tp", "t0", "t1", "t2", \
+ "s0", "s1", "a0", "a1", "a2", "a3", "a4", "a5", \
+ "a6", "a7", "s2", "s3", "s4", "s5", "s6", "s7", \
+ "s8", "s9", "s10", "s11", "t3", "t4", "t5", "t6", \
+ "ft0", "ft1", "ft2", "ft3", "ft4", "ft5", "ft6", "ft7", \
+ "fs0", "fs1", "fa0", "fa1", "fa2", "fa3", "fa4", "fa5", \
+ "fa6", "fa7", "fs2", "fs3", "fs4", "fs5", "fs6", "fs7", \
+ "fs8", "fs9", "fs10","fs11","ft8", "ft9", "ft10","ft11", \
+ "arg", "frame", }
+
+#define ADDITIONAL_REGISTER_NAMES \
+{ \
+ { "x0", 0 + GP_REG_FIRST }, \
+ { "x1", 1 + GP_REG_FIRST }, \
+ { "x2", 2 + GP_REG_FIRST }, \
+ { "x3", 3 + GP_REG_FIRST }, \
+ { "x4", 4 + GP_REG_FIRST }, \
+ { "x5", 5 + GP_REG_FIRST }, \
+ { "x6", 6 + GP_REG_FIRST }, \
+ { "x7", 7 + GP_REG_FIRST }, \
+ { "x8", 8 + GP_REG_FIRST }, \
+ { "x9", 9 + GP_REG_FIRST }, \
+ { "x10", 10 + GP_REG_FIRST }, \
+ { "x11", 11 + GP_REG_FIRST }, \
+ { "x12", 12 + GP_REG_FIRST }, \
+ { "x13", 13 + GP_REG_FIRST }, \
+ { "x14", 14 + GP_REG_FIRST }, \
+ { "x15", 15 + GP_REG_FIRST }, \
+ { "x16", 16 + GP_REG_FIRST }, \
+ { "x17", 17 + GP_REG_FIRST }, \
+ { "x18", 18 + GP_REG_FIRST }, \
+ { "x19", 19 + GP_REG_FIRST }, \
+ { "x20", 20 + GP_REG_FIRST }, \
+ { "x21", 21 + GP_REG_FIRST }, \
+ { "x22", 22 + GP_REG_FIRST }, \
+ { "x23", 23 + GP_REG_FIRST }, \
+ { "x24", 24 + GP_REG_FIRST }, \
+ { "x25", 25 + GP_REG_FIRST }, \
+ { "x26", 26 + GP_REG_FIRST }, \
+ { "x27", 27 + GP_REG_FIRST }, \
+ { "x28", 28 + GP_REG_FIRST }, \
+ { "x29", 29 + GP_REG_FIRST }, \
+ { "x30", 30 + GP_REG_FIRST }, \
+ { "x31", 31 + GP_REG_FIRST }, \
+ { "f0", 0 + FP_REG_FIRST }, \
+ { "f1", 1 + FP_REG_FIRST }, \
+ { "f2", 2 + FP_REG_FIRST }, \
+ { "f3", 3 + FP_REG_FIRST }, \
+ { "f4", 4 + FP_REG_FIRST }, \
+ { "f5", 5 + FP_REG_FIRST }, \
+ { "f6", 6 + FP_REG_FIRST }, \
+ { "f7", 7 + FP_REG_FIRST }, \
+ { "f8", 8 + FP_REG_FIRST }, \
+ { "f9", 9 + FP_REG_FIRST }, \
+ { "f10", 10 + FP_REG_FIRST }, \
+ { "f11", 11 + FP_REG_FIRST }, \
+ { "f12", 12 + FP_REG_FIRST }, \
+ { "f13", 13 + FP_REG_FIRST }, \
+ { "f14", 14 + FP_REG_FIRST }, \
+ { "f15", 15 + FP_REG_FIRST }, \
+ { "f16", 16 + FP_REG_FIRST }, \
+ { "f17", 17 + FP_REG_FIRST }, \
+ { "f18", 18 + FP_REG_FIRST }, \
+ { "f19", 19 + FP_REG_FIRST }, \
+ { "f20", 20 + FP_REG_FIRST }, \
+ { "f21", 21 + FP_REG_FIRST }, \
+ { "f22", 22 + FP_REG_FIRST }, \
+ { "f23", 23 + FP_REG_FIRST }, \
+ { "f24", 24 + FP_REG_FIRST }, \
+ { "f25", 25 + FP_REG_FIRST }, \
+ { "f26", 26 + FP_REG_FIRST }, \
+ { "f27", 27 + FP_REG_FIRST }, \
+ { "f28", 28 + FP_REG_FIRST }, \
+ { "f29", 29 + FP_REG_FIRST }, \
+ { "f30", 30 + FP_REG_FIRST }, \
+ { "f31", 31 + FP_REG_FIRST }, \
+}
+
+/* Globalizing directive for a label. */
+#define GLOBAL_ASM_OP "\t.globl\t"
+
+/* This is how to store into the string LABEL
+ the symbol_ref name of an internal numbered label where
+ PREFIX is the class of label and NUM is the number within the class.
+ This is suitable for output with `assemble_name'. */
+
+#undef ASM_GENERATE_INTERNAL_LABEL
+#define ASM_GENERATE_INTERNAL_LABEL(LABEL,PREFIX,NUM) \
+ sprintf ((LABEL), "*%s%s%ld", (LOCAL_LABEL_PREFIX), (PREFIX), (long)(NUM))
+
+/* This is how to output an element of a case-vector that is absolute. */
+
+#define ASM_OUTPUT_ADDR_VEC_ELT(STREAM, VALUE) \
+ fprintf (STREAM, "\t.word\t%sL%d\n", LOCAL_LABEL_PREFIX, VALUE)
+
+/* This is how to output an element of a PIC case-vector. */
+
+#define ASM_OUTPUT_ADDR_DIFF_ELT(STREAM, BODY, VALUE, REL) \
+ fprintf (STREAM, "\t.word\t%sL%d-%sL%d\n", \
+ LOCAL_LABEL_PREFIX, VALUE, LOCAL_LABEL_PREFIX, REL)
+
+/* This is how to output an assembler line
+ that says to advance the location counter
+ to a multiple of 2**LOG bytes. */
+
+#define ASM_OUTPUT_ALIGN(STREAM,LOG) \
+ fprintf (STREAM, "\t.align\t%d\n", (LOG))
+
+/* Define the strings to put out for each section in the object file. */
+#define TEXT_SECTION_ASM_OP "\t.text" /* instructions */
+#define DATA_SECTION_ASM_OP "\t.data" /* large data */
+#define READONLY_DATA_SECTION_ASM_OP "\t.section\t.rodata"
+#define BSS_SECTION_ASM_OP "\t.bss"
+#define SBSS_SECTION_ASM_OP "\t.section\t.sbss,\"aw\",@nobits"
+#define SDATA_SECTION_ASM_OP "\t.section\t.sdata,\"aw\",@progbits"
+
+#define ASM_OUTPUT_REG_PUSH(STREAM,REGNO) \
+do \
+ { \
+ fprintf (STREAM, "\taddi\t%s,%s,-8\n\t%s\t%s,0(%s)\n", \
+ reg_names[STACK_POINTER_REGNUM], \
+ reg_names[STACK_POINTER_REGNUM], \
+ TARGET_64BIT ? "sd" : "sw", \
+ reg_names[REGNO], \
+ reg_names[STACK_POINTER_REGNUM]); \
+ } \
+while (0)
+
+#define ASM_OUTPUT_REG_POP(STREAM,REGNO) \
+do \
+ { \
+ fprintf (STREAM, "\t%s\t%s,0(%s)\n\taddi\t%s,%s,8\n", \
+ TARGET_64BIT ? "ld" : "lw", \
+ reg_names[REGNO], \
+ reg_names[STACK_POINTER_REGNUM], \
+ reg_names[STACK_POINTER_REGNUM], \
+ reg_names[STACK_POINTER_REGNUM]); \
+ } \
+while (0)
+
+#define ASM_COMMENT_START "#"
+
+#undef SIZE_TYPE
+#define SIZE_TYPE (POINTER_SIZE == 64 ? "long unsigned int" : "unsigned int")
+
+#undef PTRDIFF_TYPE
+#define PTRDIFF_TYPE (POINTER_SIZE == 64 ? "long int" : "int")
+
+/* If a memory-to-memory move would take MOVE_RATIO or more simple
+ move-instruction pairs, we will do a movmem or libcall instead. */
+
+#define MOVE_RATIO(speed) (CLEAR_RATIO (speed) / 2)
+
+/* For CLEAR_RATIO, when optimizing for size, give a better estimate
+ of the length of a memset call, but use the default otherwise. */
+
+#define CLEAR_RATIO(speed) ((speed) ? 16 : 6)
+
+/* This is similar to CLEAR_RATIO, but for a non-zero constant, so when
+ optimizing for size adjust the ratio to account for the overhead of
+ loading the constant and replicating it across the word. */
+
+#define SET_RATIO(speed) (CLEAR_RATIO (speed) - ((speed) ? 0 : 2))
+
+#ifndef USED_FOR_TARGET
+extern const enum reg_class riscv_regno_to_class[];
+extern bool riscv_hard_regno_mode_ok[][FIRST_PSEUDO_REGISTER];
+#endif
+
+#define ASM_PREFERRED_EH_DATA_FORMAT(CODE,GLOBAL) \
+ (((GLOBAL) ? DW_EH_PE_indirect : 0) | DW_EH_PE_pcrel | DW_EH_PE_sdata4)
+
+#define XLEN_SPEC \
+ "%{march=rv32*:32}" \
+ "%{march=rv64*:64}" \
+
+#define ABI_SPEC \
+ "%{mabi=ilp32:ilp32}" \
+ "%{mabi=ilp32f:ilp32f}" \
+ "%{mabi=ilp32d:ilp32d}" \
+ "%{mabi=lp64:lp64}" \
+ "%{mabi=lp64f:lp64f}" \
+ "%{mabi=lp64d:lp64d}" \
+
+#define STARTFILE_PREFIX_SPEC \
+ "/lib" XLEN_SPEC "/" ABI_SPEC "/ " \
+ "/usr/lib" XLEN_SPEC "/" ABI_SPEC "/ " \
+ "/lib/ " \
+ "/usr/lib/ "
+
+/* ISA constants needed for code generation. */
+#define OPCODE_LW 0x2003
+#define OPCODE_LD 0x3003
+#define OPCODE_AUIPC 0x17
+#define OPCODE_JALR 0x67
+#define OPCODE_LUI 0x37
+#define OPCODE_ADDI 0x13
+#define SHIFT_RD 7
+#define SHIFT_RS1 15
+#define SHIFT_IMM 20
+#define IMM_BITS 12
+
+#define IMM_REACH (1LL << IMM_BITS)
+#define CONST_HIGH_PART(VALUE) (((VALUE) + (IMM_REACH/2)) & ~(IMM_REACH-1))
+#define CONST_LOW_PART(VALUE) ((VALUE) - CONST_HIGH_PART (VALUE))
+
+#endif /* ! GCC_RISCV_H */
diff --git a/gcc/config/riscv/riscv.md b/gcc/config/riscv/riscv.md
new file mode 100644
index 0000000..18dba3b
--- /dev/null
+++ b/gcc/config/riscv/riscv.md
@@ -0,0 +1,2094 @@
+;; Machine description for RISC-V for GNU compiler.
+;; Copyright (C) 2011-2017 Free Software Foundation, Inc.
+;; Contributed by Andrew Waterman (andrew@sifive.com).
+;; Based on MIPS target for GNU compiler.
+
+;; This file is part of GCC.
+
+;; GCC is free software; you can redistribute it and/or modify
+;; it under the terms of the GNU General Public License as published by
+;; the Free Software Foundation; either version 3, or (at your option)
+;; any later version.
+
+;; GCC is distributed in the hope that it will be useful,
+;; but WITHOUT ANY WARRANTY; without even the implied warranty of
+;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+;; GNU General Public License for more details.
+
+;; You should have received a copy of the GNU General Public License
+;; along with GCC; see the file COPYING3. If not see
+;; <http://www.gnu.org/licenses/>.
+
+(define_c_enum "unspec" [
+ ;; Override return address for exception handling.
+ UNSPEC_EH_RETURN
+
+ ;; Symbolic accesses. The order of this list must match that of
+ ;; enum riscv_symbol_type in riscv-protos.h.
+ UNSPEC_ADDRESS_FIRST
+ UNSPEC_PCREL
+ UNSPEC_LOAD_GOT
+ UNSPEC_TLS
+ UNSPEC_TLS_LE
+ UNSPEC_TLS_IE
+ UNSPEC_TLS_GD
+
+ ;; High part of PC-relative address.
+ UNSPEC_AUIPC
+
+ ;; Floating-point unspecs.
+ UNSPEC_FLT_QUIET
+ UNSPEC_FLE_QUIET
+ UNSPEC_COPYSIGN
+ UNSPEC_LRINT
+ UNSPEC_LROUND
+
+ ;; Stack tie
+ UNSPEC_TIE
+])
+
+(define_c_enum "unspecv" [
+ ;; Register save and restore.
+ UNSPECV_GPR_SAVE
+ UNSPECV_GPR_RESTORE
+
+ ;; Floating-point unspecs.
+ UNSPECV_FRFLAGS
+ UNSPECV_FSFLAGS
+
+ ;; Blockage and synchronization.
+ UNSPECV_BLOCKAGE
+ UNSPECV_FENCE
+ UNSPECV_FENCE_I
+])
+
+(define_constants
+ [(RETURN_ADDR_REGNUM 1)
+ (T0_REGNUM 5)
+ (T1_REGNUM 6)
+ (S0_REGNUM 8)
+ (S1_REGNUM 9)
+ (S2_REGNUM 18)
+])
+
+(include "predicates.md")
+(include "constraints.md")
+
+;; ....................
+;;
+;; Attributes
+;;
+;; ....................
+
+(define_attr "got" "unset,xgot_high,load"
+ (const_string "unset"))
+
+;; Classification of moves, extensions and truncations. Most values
+;; are as for "type" (see below) but there are also the following
+;; move-specific values:
+;;
+;; andi a single ANDI instruction
+;; shift_shift a shift left followed by a shift right
+;;
+;; This attribute is used to determine the instruction's length and
+;; scheduling type. For doubleword moves, the attribute always describes
+;; the split instructions; in some cases, it is more appropriate for the
+;; scheduling type to be "multi" instead.
+(define_attr "move_type"
+ "unknown,load,fpload,store,fpstore,mtc,mfc,move,fmove,
+ const,logical,arith,andi,shift_shift"
+ (const_string "unknown"))
+
+;; Main data type used by the insn
+(define_attr "mode" "unknown,none,QI,HI,SI,DI,TI,SF,DF,TF"
+ (const_string "unknown"))
+
+;; True if the main data type is twice the size of a word.
+(define_attr "dword_mode" "no,yes"
+ (cond [(and (eq_attr "mode" "DI,DF")
+ (eq (symbol_ref "TARGET_64BIT") (const_int 0)))
+ (const_string "yes")
+
+ (and (eq_attr "mode" "TI,TF")
+ (ne (symbol_ref "TARGET_64BIT") (const_int 0)))
+ (const_string "yes")]
+ (const_string "no")))
+
+;; Classification of each insn.
+;; branch conditional branch
+;; jump unconditional jump
+;; call unconditional call
+;; load load instruction(s)
+;; fpload floating point load
+;; store store instruction(s)
+;; fpstore floating point store
+;; mtc transfer to coprocessor
+;; mfc transfer from coprocessor
+;; const load constant
+;; arith integer arithmetic instructions
+;; logical integer logical instructions
+;; shift integer shift instructions
+;; slt set less than instructions
+;; imul integer multiply
+;; idiv integer divide
+;; move integer register move (addi rd, rs1, 0)
+;; fmove floating point register move
+;; fadd floating point add/subtract
+;; fmul floating point multiply
+;; fmadd floating point multiply-add
+;; fdiv floating point divide
+;; fcmp floating point compare
+;; fcvt floating point convert
+;; fsqrt floating point square root
+;; multi multiword sequence (or user asm statements)
+;; nop no operation
+;; ghost an instruction that produces no real code
+(define_attr "type"
+ "unknown,branch,jump,call,load,fpload,store,fpstore,
+ mtc,mfc,const,arith,logical,shift,slt,imul,idiv,move,fmove,fadd,fmul,
+ fmadd,fdiv,fcmp,fcvt,fsqrt,multi,nop,ghost"
+ (cond [(eq_attr "got" "load") (const_string "load")
+
+ ;; If a doubleword move uses these expensive instructions,
+ ;; it is usually better to schedule them in the same way
+ ;; as the singleword form, rather than as "multi".
+ (eq_attr "move_type" "load") (const_string "load")
+ (eq_attr "move_type" "fpload") (const_string "fpload")
+ (eq_attr "move_type" "store") (const_string "store")
+ (eq_attr "move_type" "fpstore") (const_string "fpstore")
+ (eq_attr "move_type" "mtc") (const_string "mtc")
+ (eq_attr "move_type" "mfc") (const_string "mfc")
+
+ ;; These types of move are always single insns.
+ (eq_attr "move_type" "fmove") (const_string "fmove")
+ (eq_attr "move_type" "arith") (const_string "arith")
+ (eq_attr "move_type" "logical") (const_string "logical")
+ (eq_attr "move_type" "andi") (const_string "logical")
+
+ ;; These types of move are always split.
+ (eq_attr "move_type" "shift_shift")
+ (const_string "multi")
+
+ ;; These types of move are split for doubleword modes only.
+ (and (eq_attr "move_type" "move,const")
+ (eq_attr "dword_mode" "yes"))
+ (const_string "multi")
+ (eq_attr "move_type" "move") (const_string "move")
+ (eq_attr "move_type" "const") (const_string "const")]
+ (const_string "unknown")))
+
+;; Length of instruction in bytes.
+(define_attr "length" ""
+ (cond [
+ ;; Branches further than +/- 4 KiB require two instructions.
+ (eq_attr "type" "branch")
+ (if_then_else (and (le (minus (match_dup 0) (pc)) (const_int 4088))
+ (le (minus (pc) (match_dup 0)) (const_int 4092)))
+ (const_int 4)
+ (const_int 8))
+
+ ;; Conservatively assume calls take two instructions (AUIPC + JALR).
+ ;; The linker will opportunistically relax the sequence to JAL.
+ (eq_attr "type" "call") (const_int 8)
+
+ ;; "Ghost" instructions occupy no space.
+ (eq_attr "type" "ghost") (const_int 0)
+
+ (eq_attr "got" "load") (const_int 8)
+
+ (eq_attr "type" "fcmp") (const_int 8)
+
+ ;; SHIFT_SHIFTs are decomposed into two separate instructions.
+ (eq_attr "move_type" "shift_shift")
+ (const_int 8)
+
+ ;; Check for doubleword moves that are decomposed into two
+ ;; instructions.
+ (and (eq_attr "move_type" "mtc,mfc,move")
+ (eq_attr "dword_mode" "yes"))
+ (const_int 8)
+
+ ;; Doubleword CONST{,N} moves are split into two word
+ ;; CONST{,N} moves.
+ (and (eq_attr "move_type" "const")
+ (eq_attr "dword_mode" "yes"))
+ (symbol_ref "riscv_split_const_insns (operands[1]) * 4")
+
+ ;; Otherwise, constants, loads and stores are handled by external
+ ;; routines.
+ (eq_attr "move_type" "load,fpload")
+ (symbol_ref "riscv_load_store_insns (operands[1], insn) * 4")
+ (eq_attr "move_type" "store,fpstore")
+ (symbol_ref "riscv_load_store_insns (operands[0], insn) * 4")
+ ] (const_int 4)))
+
+;; Is copying of this instruction disallowed?
+(define_attr "cannot_copy" "no,yes" (const_string "no"))
+
+;; Describe a user's asm statement.
+(define_asm_attributes
+ [(set_attr "type" "multi")])
+
+;; This mode iterator allows 32-bit and 64-bit GPR patterns to be generated
+;; from the same template.
+(define_mode_iterator GPR [SI (DI "TARGET_64BIT")])
+
+;; This mode iterator allows :P to be used for patterns that operate on
+;; pointer-sized quantities. Exactly one of the two alternatives will match.
+(define_mode_iterator P [(SI "Pmode == SImode") (DI "Pmode == DImode")])
+
+;; Likewise, but for XLEN-sized quantities.
+(define_mode_iterator X [(SI "!TARGET_64BIT") (DI "TARGET_64BIT")])
+
+;; Branches operate on XLEN-sized quantities, but for RV64 we accept
+;; QImode values so we can force zero-extension.
+(define_mode_iterator BR [(QI "TARGET_64BIT") SI (DI "TARGET_64BIT")])
+
+;; 32-bit moves for which we provide move patterns.
+(define_mode_iterator MOVE32 [SI])
+
+;; 64-bit modes for which we provide move patterns.
+(define_mode_iterator MOVE64 [DI DF])
+
+;; Iterator for sub-32-bit integer modes.
+(define_mode_iterator SHORT [QI HI])
+
+;; Iterator for HImode constant generation.
+(define_mode_iterator HISI [HI SI])
+
+;; Iterator for QImode extension patterns.
+(define_mode_iterator SUPERQI [HI SI (DI "TARGET_64BIT")])
+
+;; Iterator for hardware integer modes narrower than XLEN.
+(define_mode_iterator SUBX [QI HI (SI "TARGET_64BIT")])
+
+;; Iterator for hardware-supported integer modes.
+(define_mode_iterator ANYI [QI HI SI (DI "TARGET_64BIT")])
+
+;; Iterator for hardware-supported floating-point modes.
+(define_mode_iterator ANYF [(SF "TARGET_HARD_FLOAT")
+ (DF "TARGET_DOUBLE_FLOAT")])
+
+;; This attribute gives the length suffix for a sign- or zero-extension
+;; instruction.
+(define_mode_attr size [(QI "b") (HI "h")])
+
+;; Mode attributes for loads.
+(define_mode_attr load [(QI "lb") (HI "lh") (SI "lw") (DI "ld") (SF "flw") (DF "fld")])
+
+;; Instruction names for stores.
+(define_mode_attr store [(QI "sb") (HI "sh") (SI "sw") (DI "sd") (SF "fsw") (DF "fsd")])
+
+;; This attribute gives the best constraint to use for registers of
+;; a given mode.
+(define_mode_attr reg [(SI "d") (DI "d") (CC "d")])
+
+;; This attribute gives the format suffix for floating-point operations.
+(define_mode_attr fmt [(SF "s") (DF "d")])
+
+;; This attribute gives the integer suffix for floating-point conversions.
+(define_mode_attr ifmt [(SI "w") (DI "l")])
+
+;; This attribute gives the format suffix for atomic memory operations.
+(define_mode_attr amo [(SI "w") (DI "d")])
+
+;; This attribute gives the upper-case mode name for one unit of a
+;; floating-point mode.
+(define_mode_attr UNITMODE [(SF "SF") (DF "DF")])
+
+;; This attribute gives the integer mode that has half the size of
+;; the controlling mode.
+(define_mode_attr HALFMODE [(DF "SI") (DI "SI") (TF "DI")])
+
+;; Iterator and attributes for floating-point rounding instructions.
+(define_int_iterator RINT [UNSPEC_LRINT UNSPEC_LROUND])
+(define_int_attr rint_pattern [(UNSPEC_LRINT "rint") (UNSPEC_LROUND "round")])
+(define_int_attr rint_rm [(UNSPEC_LRINT "dyn") (UNSPEC_LROUND "rmm")])
+
+;; Iterator and attributes for quiet comparisons.
+(define_int_iterator QUIET_COMPARISON [UNSPEC_FLT_QUIET UNSPEC_FLE_QUIET])
+(define_int_attr quiet_pattern [(UNSPEC_FLT_QUIET "lt") (UNSPEC_FLE_QUIET "le")])
+
+;; This code iterator allows signed and unsigned widening multiplications
+;; to use the same template.
+(define_code_iterator any_extend [sign_extend zero_extend])
+
+;; This code iterator allows the two right shift instructions to be
+;; generated from the same template.
+(define_code_iterator any_shiftrt [ashiftrt lshiftrt])
+
+;; This code iterator allows the three shift instructions to be generated
+;; from the same template.
+(define_code_iterator any_shift [ashift ashiftrt lshiftrt])
+
+;; This code iterator allows the three bitwise instructions to be generated
+;; from the same template.
+(define_code_iterator any_bitwise [and ior xor])
+
+;; This code iterator allows unsigned and signed division to be generated
+;; from the same template.
+(define_code_iterator any_div [div udiv mod umod])
+
+;; This code iterator allows unsigned and signed modulus to be generated
+;; from the same template.
+(define_code_iterator any_mod [mod umod])
+
+;; These code iterators allow the signed and unsigned scc operations to use
+;; the same template.
+(define_code_iterator any_gt [gt gtu])
+(define_code_iterator any_ge [ge geu])
+(define_code_iterator any_lt [lt ltu])
+(define_code_iterator any_le [le leu])
+
+;; <u> expands to an empty string when doing a signed operation and
+;; "u" when doing an unsigned operation.
+(define_code_attr u [(sign_extend "") (zero_extend "u")
+ (gt "") (gtu "u")
+ (ge "") (geu "u")
+ (lt "") (ltu "u")
+ (le "") (leu "u")])
+
+;; <su> is like <u>, but the signed form expands to "s" rather than "".
+(define_code_attr su [(sign_extend "s") (zero_extend "u")])
+
+;; <optab> expands to the name of the optab for a particular code.
+(define_code_attr optab [(ashift "ashl")
+ (ashiftrt "ashr")
+ (lshiftrt "lshr")
+ (div "div")
+ (mod "mod")
+ (udiv "udiv")
+ (umod "umod")
+ (ge "ge")
+ (le "le")
+ (gt "gt")
+ (lt "lt")
+ (ior "ior")
+ (xor "xor")
+ (and "and")
+ (plus "add")
+ (minus "sub")])
+
+;; <insn> expands to the name of the insn that implements a particular code.
+(define_code_attr insn [(ashift "sll")
+ (ashiftrt "sra")
+ (lshiftrt "srl")
+ (div "div")
+ (mod "rem")
+ (udiv "divu")
+ (umod "remu")
+ (ior "or")
+ (xor "xor")
+ (and "and")
+ (plus "add")
+ (minus "sub")])
+
+;; Ghost instructions produce no real code and introduce no hazards.
+;; They exist purely to express an effect on dataflow.
+(define_insn_reservation "ghost" 0
+ (eq_attr "type" "ghost")
+ "nothing")
+
+;;
+;; ....................
+;;
+;; ADDITION
+;;
+;; ....................
+;;
+
+(define_insn "add<mode>3"
+ [(set (match_operand:ANYF 0 "register_operand" "=f")
+ (plus:ANYF (match_operand:ANYF 1 "register_operand" " f")
+ (match_operand:ANYF 2 "register_operand" " f")))]
+ "TARGET_HARD_FLOAT"
+ "fadd.<fmt>\t%0,%1,%2"
+ [(set_attr "type" "fadd")
+ (set_attr "mode" "<UNITMODE>")])
+
+(define_insn "addsi3"
+ [(set (match_operand:SI 0 "register_operand" "=r,r")
+ (plus:SI (match_operand:SI 1 "register_operand" " r,r")
+ (match_operand:SI 2 "arith_operand" " r,I")))]
+ ""
+ { return TARGET_64BIT ? "addw\t%0,%1,%2" : "add\t%0,%1,%2"; }
+ [(set_attr "type" "arith")
+ (set_attr "mode" "SI")])
+
+(define_insn "adddi3"
+ [(set (match_operand:DI 0 "register_operand" "=r,r")
+ (plus:DI (match_operand:DI 1 "register_operand" " r,r")
+ (match_operand:DI 2 "arith_operand" " r,I")))]
+ "TARGET_64BIT"
+ "add\t%0,%1,%2"
+ [(set_attr "type" "arith")
+ (set_attr "mode" "DI")])
+
+(define_insn "*addsi3_extended"
+ [(set (match_operand:DI 0 "register_operand" "=r,r")
+ (sign_extend:DI
+ (plus:SI (match_operand:SI 1 "register_operand" " r,r")
+ (match_operand:SI 2 "arith_operand" " r,I"))))]
+ "TARGET_64BIT"
+ "addw\t%0,%1,%2"
+ [(set_attr "type" "arith")
+ (set_attr "mode" "SI")])
+
+(define_insn "*addsi3_extended2"
+ [(set (match_operand:DI 0 "register_operand" "=r,r")
+ (sign_extend:DI
+ (subreg:SI (plus:DI (match_operand:DI 1 "register_operand" " r,r")
+ (match_operand:DI 2 "arith_operand" " r,I"))
+ 0)))]
+ "TARGET_64BIT"
+ "addw\t%0,%1,%2"
+ [(set_attr "type" "arith")
+ (set_attr "mode" "SI")])
+
+;;
+;; ....................
+;;
+;; SUBTRACTION
+;;
+;; ....................
+;;
+
+(define_insn "sub<mode>3"
+ [(set (match_operand:ANYF 0 "register_operand" "=f")
+ (minus:ANYF (match_operand:ANYF 1 "register_operand" " f")
+ (match_operand:ANYF 2 "register_operand" " f")))]
+ "TARGET_HARD_FLOAT"
+ "fsub.<fmt>\t%0,%1,%2"
+ [(set_attr "type" "fadd")
+ (set_attr "mode" "<UNITMODE>")])
+
+(define_insn "subdi3"
+ [(set (match_operand:DI 0 "register_operand" "= r")
+ (minus:DI (match_operand:DI 1 "reg_or_0_operand" " rJ")
+ (match_operand:DI 2 "register_operand" " r")))]
+ "TARGET_64BIT"
+ "sub\t%0,%z1,%2"
+ [(set_attr "type" "arith")
+ (set_attr "mode" "DI")])
+
+(define_insn "subsi3"
+ [(set (match_operand:SI 0 "register_operand" "= r")
+ (minus:SI (match_operand:SI 1 "reg_or_0_operand" " rJ")
+ (match_operand:SI 2 "register_operand" " r")))]
+ ""
+ { return TARGET_64BIT ? "subw\t%0,%z1,%2" : "sub\t%0,%z1,%2"; }
+ [(set_attr "type" "arith")
+ (set_attr "mode" "SI")])
+
+(define_insn "*subsi3_extended"
+ [(set (match_operand:DI 0 "register_operand" "= r")
+ (sign_extend:DI
+ (minus:SI (match_operand:SI 1 "reg_or_0_operand" " rJ")
+ (match_operand:SI 2 "register_operand" " r"))))]
+ "TARGET_64BIT"
+ "subw\t%0,%z1,%2"
+ [(set_attr "type" "arith")
+ (set_attr "mode" "SI")])
+
+(define_insn "*subsi3_extended2"
+ [(set (match_operand:DI 0 "register_operand" "=r")
+ (sign_extend:DI
+ (subreg:SI (minus:DI (match_operand:DI 1 "reg_or_0_operand" " r")
+ (match_operand:DI 2 "register_operand" " r"))
+ 0)))]
+ "TARGET_64BIT"
+ "subw\t%0,%z1,%2"
+ [(set_attr "type" "arith")
+ (set_attr "mode" "SI")])
+
+;;
+;; ....................
+;;
+;; MULTIPLICATION
+;;
+;; ....................
+;;
+
+(define_insn "mul<mode>3"
+ [(set (match_operand:ANYF 0 "register_operand" "=f")
+ (mult:ANYF (match_operand:ANYF 1 "register_operand" " f")
+ (match_operand:ANYF 2 "register_operand" " f")))]
+ "TARGET_HARD_FLOAT"
+ "fmul.<fmt>\t%0,%1,%2"
+ [(set_attr "type" "fmul")
+ (set_attr "mode" "<UNITMODE>")])
+
+(define_insn "mulsi3"
+ [(set (match_operand:SI 0 "register_operand" "=r")
+ (mult:SI (match_operand:SI 1 "register_operand" " r")
+ (match_operand:SI 2 "register_operand" " r")))]
+ "TARGET_MUL"
+ { return TARGET_64BIT ? "mulw\t%0,%1,%2" : "mul\t%0,%1,%2"; }
+ [(set_attr "type" "imul")
+ (set_attr "mode" "SI")])
+
+(define_insn "muldi3"
+ [(set (match_operand:DI 0 "register_operand" "=r")
+ (mult:DI (match_operand:DI 1 "register_operand" " r")
+ (match_operand:DI 2 "register_operand" " r")))]
+ "TARGET_MUL && TARGET_64BIT"
+ "mul\t%0,%1,%2"
+ [(set_attr "type" "imul")
+ (set_attr "mode" "DI")])
+
+(define_insn "*mulsi3_extended"
+ [(set (match_operand:DI 0 "register_operand" "=r")
+ (sign_extend:DI
+ (mult:SI (match_operand:SI 1 "register_operand" " r")
+ (match_operand:SI 2 "register_operand" " r"))))]
+ "TARGET_MUL && TARGET_64BIT"
+ "mulw\t%0,%1,%2"
+ [(set_attr "type" "imul")
+ (set_attr "mode" "SI")])
+
+(define_insn "*mulsi3_extended2"
+ [(set (match_operand:DI 0 "register_operand" "=r")
+ (sign_extend:DI
+ (subreg:SI (mult:DI (match_operand:DI 1 "register_operand" " r")
+ (match_operand:DI 2 "register_operand" " r"))
+ 0)))]
+ "TARGET_MUL && TARGET_64BIT"
+ "mulw\t%0,%1,%2"
+ [(set_attr "type" "imul")
+ (set_attr "mode" "SI")])
+
+;;
+;; ........................
+;;
+;; MULTIPLICATION HIGH-PART
+;;
+;; ........................
+;;
+
+
+(define_expand "<u>mulditi3"
+ [(set (match_operand:TI 0 "register_operand")
+ (mult:TI (any_extend:TI (match_operand:DI 1 "register_operand"))
+ (any_extend:TI (match_operand:DI 2 "register_operand"))))]
+ "TARGET_MUL && TARGET_64BIT"
+{
+ rtx low = gen_reg_rtx (DImode);
+ emit_insn (gen_muldi3 (low, operands[1], operands[2]));
+
+ rtx high = gen_reg_rtx (DImode);
+ emit_insn (gen_<u>muldi3_highpart (high, operands[1], operands[2]));
+
+ emit_move_insn (gen_lowpart (DImode, operands[0]), low);
+ emit_move_insn (gen_highpart (DImode, operands[0]), high);
+ DONE;
+})
+
+(define_insn "<u>muldi3_highpart"
+ [(set (match_operand:DI 0 "register_operand" "=r")
+ (truncate:DI
+ (lshiftrt:TI
+ (mult:TI (any_extend:TI
+ (match_operand:DI 1 "register_operand" " r"))
+ (any_extend:TI
+ (match_operand:DI 2 "register_operand" " r")))
+ (const_int 64))))]
+ "TARGET_MUL && TARGET_64BIT"
+ "mulh<u>\t%0,%1,%2"
+ [(set_attr "type" "imul")
+ (set_attr "mode" "DI")])
+
+(define_expand "usmulditi3"
+ [(set (match_operand:TI 0 "register_operand")
+ (mult:TI (zero_extend:TI (match_operand:DI 1 "register_operand"))
+ (sign_extend:TI (match_operand:DI 2 "register_operand"))))]
+ "TARGET_MUL && TARGET_64BIT"
+{
+ rtx low = gen_reg_rtx (DImode);
+ emit_insn (gen_muldi3 (low, operands[1], operands[2]));
+
+ rtx high = gen_reg_rtx (DImode);
+ emit_insn (gen_usmuldi3_highpart (high, operands[1], operands[2]));
+
+ emit_move_insn (gen_lowpart (DImode, operands[0]), low);
+ emit_move_insn (gen_highpart (DImode, operands[0]), high);
+ DONE;
+})
+
+(define_insn "usmuldi3_highpart"
+ [(set (match_operand:DI 0 "register_operand" "=r")
+ (truncate:DI
+ (lshiftrt:TI
+ (mult:TI (zero_extend:TI
+ (match_operand:DI 1 "register_operand" "r"))
+ (sign_extend:TI
+ (match_operand:DI 2 "register_operand" " r")))
+ (const_int 64))))]
+ "TARGET_MUL && TARGET_64BIT"
+ "mulhsu\t%0,%2,%1"
+ [(set_attr "type" "imul")
+ (set_attr "mode" "DI")])
+
+(define_expand "<u>mulsidi3"
+ [(set (match_operand:DI 0 "register_operand" "=r")
+ (mult:DI (any_extend:DI
+ (match_operand:SI 1 "register_operand" " r"))
+ (any_extend:DI
+ (match_operand:SI 2 "register_operand" " r"))))]
+ "TARGET_MUL && !TARGET_64BIT"
+{
+ rtx temp = gen_reg_rtx (SImode);
+ emit_insn (gen_mulsi3 (temp, operands[1], operands[2]));
+ emit_insn (gen_<u>mulsi3_highpart (riscv_subword (operands[0], true),
+ operands[1], operands[2]));
+ emit_insn (gen_movsi (riscv_subword (operands[0], false), temp));
+ DONE;
+})
+
+(define_insn "<u>mulsi3_highpart"
+ [(set (match_operand:SI 0 "register_operand" "=r")
+ (truncate:SI
+ (lshiftrt:DI
+ (mult:DI (any_extend:DI
+ (match_operand:SI 1 "register_operand" " r"))
+ (any_extend:DI
+ (match_operand:SI 2 "register_operand" " r")))
+ (const_int 32))))]
+ "TARGET_MUL && !TARGET_64BIT"
+ "mulh<u>\t%0,%1,%2"
+ [(set_attr "type" "imul")
+ (set_attr "mode" "SI")])
+
+
+(define_expand "usmulsidi3"
+ [(set (match_operand:DI 0 "register_operand" "=r")
+ (mult:DI (zero_extend:DI
+ (match_operand:SI 1 "register_operand" " r"))
+ (sign_extend:DI
+ (match_operand:SI 2 "register_operand" " r"))))]
+ "TARGET_MUL && !TARGET_64BIT"
+{
+ rtx temp = gen_reg_rtx (SImode);
+ emit_insn (gen_mulsi3 (temp, operands[1], operands[2]));
+ emit_insn (gen_usmulsi3_highpart (riscv_subword (operands[0], true),
+ operands[1], operands[2]));
+ emit_insn (gen_movsi (riscv_subword (operands[0], false), temp));
+ DONE;
+})
+
+(define_insn "usmulsi3_highpart"
+ [(set (match_operand:SI 0 "register_operand" "=r")
+ (truncate:SI
+ (lshiftrt:DI
+ (mult:DI (zero_extend:DI
+ (match_operand:SI 1 "register_operand" " r"))
+ (sign_extend:DI
+ (match_operand:SI 2 "register_operand" " r")))
+ (const_int 32))))]
+ "TARGET_MUL && !TARGET_64BIT"
+ "mulhsu\t%0,%2,%1"
+ [(set_attr "type" "imul")
+ (set_attr "mode" "SI")])
+
+;;
+;; ....................
+;;
+;; DIVISION and REMAINDER
+;;
+;; ....................
+;;
+
+(define_insn "<optab>si3"
+ [(set (match_operand:SI 0 "register_operand" "=r")
+ (any_div:SI (match_operand:SI 1 "register_operand" " r")
+ (match_operand:SI 2 "register_operand" " r")))]
+ "TARGET_DIV"
+ { return TARGET_64BIT ? "<insn>w\t%0,%1,%2" : "<insn>\t%0,%1,%2"; }
+ [(set_attr "type" "idiv")
+ (set_attr "mode" "SI")])
+
+(define_insn "<optab>di3"
+ [(set (match_operand:DI 0 "register_operand" "=r")
+ (any_div:DI (match_operand:DI 1 "register_operand" " r")
+ (match_operand:DI 2 "register_operand" " r")))]
+ "TARGET_DIV && TARGET_64BIT"
+ "<insn>\t%0,%1,%2"
+ [(set_attr "type" "idiv")
+ (set_attr "mode" "DI")])
+
+(define_insn "*<optab>si3_extended"
+ [(set (match_operand:DI 0 "register_operand" "=r")
+ (sign_extend:DI
+ (any_div:SI (match_operand:SI 1 "register_operand" " r")
+ (match_operand:SI 2 "register_operand" " r"))))]
+ "TARGET_DIV && TARGET_64BIT"
+ "<insn>w\t%0,%1,%2"
+ [(set_attr "type" "idiv")
+ (set_attr "mode" "DI")])
+
+(define_insn "div<mode>3"
+ [(set (match_operand:ANYF 0 "register_operand" "=f")
+ (div:ANYF (match_operand:ANYF 1 "register_operand" " f")
+ (match_operand:ANYF 2 "register_operand" " f")))]
+ "TARGET_HARD_FLOAT && TARGET_FDIV"
+ "fdiv.<fmt>\t%0,%1,%2"
+ [(set_attr "type" "fdiv")
+ (set_attr "mode" "<UNITMODE>")])
+
+;;
+;; ....................
+;;
+;; SQUARE ROOT
+;;
+;; ....................
+
+(define_insn "sqrt<mode>2"
+ [(set (match_operand:ANYF 0 "register_operand" "=f")
+ (sqrt:ANYF (match_operand:ANYF 1 "register_operand" " f")))]
+ "TARGET_HARD_FLOAT && TARGET_FDIV"
+{
+ return "fsqrt.<fmt>\t%0,%1";
+}
+ [(set_attr "type" "fsqrt")
+ (set_attr "mode" "<UNITMODE>")])
+
+;; Floating point multiply accumulate instructions.
+
+;; a * b + c
+(define_insn "fma<mode>4"
+ [(set (match_operand:ANYF 0 "register_operand" "=f")
+ (fma:ANYF (match_operand:ANYF 1 "register_operand" " f")
+ (match_operand:ANYF 2 "register_operand" " f")
+ (match_operand:ANYF 3 "register_operand" " f")))]
+ "TARGET_HARD_FLOAT"
+ "fmadd.<fmt>\t%0,%1,%2,%3"
+ [(set_attr "type" "fmadd")
+ (set_attr "mode" "<UNITMODE>")])
+
+;; a * b - c
+(define_insn "fms<mode>4"
+ [(set (match_operand:ANYF 0 "register_operand" "=f")
+ (fma:ANYF (match_operand:ANYF 1 "register_operand" " f")
+ (match_operand:ANYF 2 "register_operand" " f")
+ (neg:ANYF (match_operand:ANYF 3 "register_operand" " f"))))]
+ "TARGET_HARD_FLOAT"
+ "fmsub.<fmt>\t%0,%1,%2,%3"
+ [(set_attr "type" "fmadd")
+ (set_attr "mode" "<UNITMODE>")])
+
+;; -a * b - c
+(define_insn "fnms<mode>4"
+ [(set (match_operand:ANYF 0 "register_operand" "=f")
+ (fma:ANYF
+ (neg:ANYF (match_operand:ANYF 1 "register_operand" " f"))
+ (match_operand:ANYF 2 "register_operand" " f")
+ (neg:ANYF (match_operand:ANYF 3 "register_operand" " f"))))]
+ "TARGET_HARD_FLOAT"
+ "fnmadd.<fmt>\t%0,%1,%2,%3"
+ [(set_attr "type" "fmadd")
+ (set_attr "mode" "<UNITMODE>")])
+
+;; -a * b + c
+(define_insn "fnma<mode>4"
+ [(set (match_operand:ANYF 0 "register_operand" "=f")
+ (fma:ANYF
+ (neg:ANYF (match_operand:ANYF 1 "register_operand" " f"))
+ (match_operand:ANYF 2 "register_operand" " f")
+ (match_operand:ANYF 3 "register_operand" " f")))]
+ "TARGET_HARD_FLOAT"
+ "fnmsub.<fmt>\t%0,%1,%2,%3"
+ [(set_attr "type" "fmadd")
+ (set_attr "mode" "<UNITMODE>")])
+
+;; -(-a * b - c), modulo signed zeros
+(define_insn "*fma<mode>4"
+ [(set (match_operand:ANYF 0 "register_operand" "=f")
+ (neg:ANYF
+ (fma:ANYF
+ (neg:ANYF (match_operand:ANYF 1 "register_operand" " f"))
+ (match_operand:ANYF 2 "register_operand" " f")
+ (neg:ANYF (match_operand:ANYF 3 "register_operand" " f")))))]
+ "TARGET_HARD_FLOAT && !HONOR_SIGNED_ZEROS (<MODE>mode)"
+ "fmadd.<fmt>\t%0,%1,%2,%3"
+ [(set_attr "type" "fmadd")
+ (set_attr "mode" "<UNITMODE>")])
+
+;; -(-a * b + c), modulo signed zeros
+(define_insn "*fms<mode>4"
+ [(set (match_operand:ANYF 0 "register_operand" "=f")
+ (neg:ANYF
+ (fma:ANYF
+ (neg:ANYF (match_operand:ANYF 1 "register_operand" " f"))
+ (match_operand:ANYF 2 "register_operand" " f")
+ (match_operand:ANYF 3 "register_operand" " f"))))]
+ "TARGET_HARD_FLOAT && !HONOR_SIGNED_ZEROS (<MODE>mode)"
+ "fmsub.<fmt>\t%0,%1,%2,%3"
+ [(set_attr "type" "fmadd")
+ (set_attr "mode" "<UNITMODE>")])
+
+;; -(a * b + c), modulo signed zeros
+(define_insn "*fnms<mode>4"
+ [(set (match_operand:ANYF 0 "register_operand" "=f")
+ (neg:ANYF
+ (fma:ANYF
+ (match_operand:ANYF 1 "register_operand" " f")
+ (match_operand:ANYF 2 "register_operand" " f")
+ (match_operand:ANYF 3 "register_operand" " f"))))]
+ "TARGET_HARD_FLOAT && !HONOR_SIGNED_ZEROS (<MODE>mode)"
+ "fnmadd.<fmt>\t%0,%1,%2,%3"
+ [(set_attr "type" "fmadd")
+ (set_attr "mode" "<UNITMODE>")])
+
+;; -(a * b - c), modulo signed zeros
+(define_insn "*fnma<mode>4"
+ [(set (match_operand:ANYF 0 "register_operand" "=f")
+ (neg:ANYF
+ (fma:ANYF
+ (match_operand:ANYF 1 "register_operand" " f")
+ (match_operand:ANYF 2 "register_operand" " f")
+ (neg:ANYF (match_operand:ANYF 3 "register_operand" " f")))))]
+ "TARGET_HARD_FLOAT && !HONOR_SIGNED_ZEROS (<MODE>mode)"
+ "fnmsub.<fmt>\t%0,%1,%2,%3"
+ [(set_attr "type" "fmadd")
+ (set_attr "mode" "<UNITMODE>")])
+
+;;
+;; ....................
+;;
+;; SIGN INJECTION
+;;
+;; ....................
+
+(define_insn "abs<mode>2"
+ [(set (match_operand:ANYF 0 "register_operand" "=f")
+ (abs:ANYF (match_operand:ANYF 1 "register_operand" " f")))]
+ "TARGET_HARD_FLOAT"
+ "fabs.<fmt>\t%0,%1"
+ [(set_attr "type" "fmove")
+ (set_attr "mode" "<UNITMODE>")])
+
+(define_insn "copysign<mode>3"
+ [(set (match_operand:ANYF 0 "register_operand" "=f")
+ (unspec:ANYF [(match_operand:ANYF 1 "register_operand" " f")
+ (match_operand:ANYF 2 "register_operand" " f")]
+ UNSPEC_COPYSIGN))]
+ "TARGET_HARD_FLOAT"
+ "fsgnj.<fmt>\t%0,%1,%2"
+ [(set_attr "type" "fmove")
+ (set_attr "mode" "<UNITMODE>")])
+
+(define_insn "neg<mode>2"
+ [(set (match_operand:ANYF 0 "register_operand" "=f")
+ (neg:ANYF (match_operand:ANYF 1 "register_operand" " f")))]
+ "TARGET_HARD_FLOAT"
+ "fneg.<fmt>\t%0,%1"
+ [(set_attr "type" "fmove")
+ (set_attr "mode" "<UNITMODE>")])
+
+;;
+;; ....................
+;;
+;; MIN/MAX
+;;
+;; ....................
+
+(define_insn "smin<mode>3"
+ [(set (match_operand:ANYF 0 "register_operand" "=f")
+ (smin:ANYF (match_operand:ANYF 1 "register_operand" " f")
+ (match_operand:ANYF 2 "register_operand" " f")))]
+ "TARGET_HARD_FLOAT"
+ "fmin.<fmt>\t%0,%1,%2"
+ [(set_attr "type" "fmove")
+ (set_attr "mode" "<UNITMODE>")])
+
+(define_insn "smax<mode>3"
+ [(set (match_operand:ANYF 0 "register_operand" "=f")
+ (smax:ANYF (match_operand:ANYF 1 "register_operand" " f")
+ (match_operand:ANYF 2 "register_operand" " f")))]
+ "TARGET_HARD_FLOAT"
+ "fmax.<fmt>\t%0,%1,%2"
+ [(set_attr "type" "fmove")
+ (set_attr "mode" "<UNITMODE>")])
+
+;;
+;; ....................
+;;
+;; LOGICAL
+;;
+;; ....................
+;;
+
+;; For RV64, we don't expose the SImode operations to the rtl expanders,
+;; but SImode versions exist for combine.
+
+(define_insn "<optab><mode>3"
+ [(set (match_operand:X 0 "register_operand" "=r,r")
+ (any_bitwise:X (match_operand:X 1 "register_operand" "%r,r")
+ (match_operand:X 2 "arith_operand" " r,I")))]
+ ""
+ "<insn>\t%0,%1,%2"
+ [(set_attr "type" "logical")
+ (set_attr "mode" "<MODE>")])
+
+(define_insn "*<optab>si3_internal"
+ [(set (match_operand:SI 0 "register_operand" "=r,r")
+ (any_bitwise:SI (match_operand:SI 1 "register_operand" "%r,r")
+ (match_operand:SI 2 "arith_operand" " r,I")))]
+ "TARGET_64BIT"
+ "<insn>\t%0,%1,%2"
+ [(set_attr "type" "logical")
+ (set_attr "mode" "SI")])
+
+(define_insn "one_cmpl<mode>2"
+ [(set (match_operand:X 0 "register_operand" "=r")
+ (not:X (match_operand:X 1 "register_operand" " r")))]
+ ""
+ "not\t%0,%1"
+ [(set_attr "type" "logical")
+ (set_attr "mode" "<MODE>")])
+
+(define_insn "*one_cmplsi2_internal"
+ [(set (match_operand:SI 0 "register_operand" "=r")
+ (not:SI (match_operand:SI 1 "register_operand" " r")))]
+ "TARGET_64BIT"
+ "not\t%0,%1"
+ [(set_attr "type" "logical")
+ (set_attr "mode" "SI")])
+
+;;
+;; ....................
+;;
+;; TRUNCATION
+;;
+;; ....................
+
+(define_insn "truncdfsf2"
+ [(set (match_operand:SF 0 "register_operand" "=f")
+ (float_truncate:SF
+ (match_operand:DF 1 "register_operand" " f")))]
+ "TARGET_DOUBLE_FLOAT"
+ "fcvt.s.d\t%0,%1"
+ [(set_attr "type" "fcvt")
+ (set_attr "mode" "SF")])
+
+;;
+;; ....................
+;;
+;; ZERO EXTENSION
+;;
+;; ....................
+
+;; Extension insns.
+
+(define_insn_and_split "zero_extendsidi2"
+ [(set (match_operand:DI 0 "register_operand" "=r,r")
+ (zero_extend:DI
+ (match_operand:SI 1 "nonimmediate_operand" " r,m")))]
+ "TARGET_64BIT"
+ "@
+ #
+ lwu\t%0,%1"
+ "&& reload_completed && REG_P (operands[1])"
+ [(set (match_dup 0)
+ (ashift:DI (match_dup 1) (const_int 32)))
+ (set (match_dup 0)
+ (lshiftrt:DI (match_dup 0) (const_int 32)))]
+ { operands[1] = gen_lowpart (DImode, operands[1]); }
+ [(set_attr "move_type" "shift_shift,load")
+ (set_attr "mode" "DI")])
+
+(define_insn_and_split "zero_extendhi<GPR:mode>2"
+ [(set (match_operand:GPR 0 "register_operand" "=r,r")
+ (zero_extend:GPR
+ (match_operand:HI 1 "nonimmediate_operand" " r,m")))]
+ ""
+ "@
+ #
+ lhu\t%0,%1"
+ "&& reload_completed && REG_P (operands[1])"
+ [(set (match_dup 0)
+ (ashift:GPR (match_dup 1) (match_dup 2)))
+ (set (match_dup 0)
+ (lshiftrt:GPR (match_dup 0) (match_dup 2)))]
+ {
+ operands[1] = gen_lowpart (<GPR:MODE>mode, operands[1]);
+ operands[2] = GEN_INT(GET_MODE_BITSIZE(<GPR:MODE>mode) - 16);
+ }
+ [(set_attr "move_type" "shift_shift,load")
+ (set_attr "mode" "<GPR:MODE>")])
+
+(define_insn "zero_extendqi<SUPERQI:mode>2"
+ [(set (match_operand:SUPERQI 0 "register_operand" "=r,r")
+ (zero_extend:SUPERQI
+ (match_operand:QI 1 "nonimmediate_operand" " r,m")))]
+ ""
+ "@
+ and\t%0,%1,0xff
+ lbu\t%0,%1"
+ [(set_attr "move_type" "andi,load")
+ (set_attr "mode" "<SUPERQI:MODE>")])
+
+;;
+;; ....................
+;;
+;; SIGN EXTENSION
+;;
+;; ....................
+
+(define_insn "extendsidi2"
+ [(set (match_operand:DI 0 "register_operand" "=r,r")
+ (sign_extend:DI
+ (match_operand:SI 1 "nonimmediate_operand" " r,m")))]
+ "TARGET_64BIT"
+ "@
+ sext.w\t%0,%1
+ lw\t%0,%1"
+ [(set_attr "move_type" "move,load")
+ (set_attr "mode" "DI")])
+
+(define_insn_and_split "extend<SHORT:mode><SUPERQI:mode>2"
+ [(set (match_operand:SUPERQI 0 "register_operand" "=r,r")
+ (sign_extend:SUPERQI
+ (match_operand:SHORT 1 "nonimmediate_operand" " r,m")))]
+ ""
+ "@
+ #
+ l<SHORT:size>\t%0,%1"
+ "&& reload_completed && REG_P (operands[1])"
+ [(set (match_dup 0) (ashift:SI (match_dup 1) (match_dup 2)))
+ (set (match_dup 0) (ashiftrt:SI (match_dup 0) (match_dup 2)))]
+{
+ operands[0] = gen_lowpart (SImode, operands[0]);
+ operands[1] = gen_lowpart (SImode, operands[1]);
+ operands[2] = GEN_INT (GET_MODE_BITSIZE (SImode)
+ - GET_MODE_BITSIZE (<SHORT:MODE>mode));
+}
+ [(set_attr "move_type" "shift_shift,load")
+ (set_attr "mode" "SI")])
+
+(define_insn "extendsfdf2"
+ [(set (match_operand:DF 0 "register_operand" "=f")
+ (float_extend:DF
+ (match_operand:SF 1 "register_operand" " f")))]
+ "TARGET_DOUBLE_FLOAT"
+ "fcvt.d.s\t%0,%1"
+ [(set_attr "type" "fcvt")
+ (set_attr "mode" "DF")])
+
+;;
+;; ....................
+;;
+;; CONVERSIONS
+;;
+;; ....................
+
+(define_insn "fix_trunc<ANYF:mode><GPR:mode>2"
+ [(set (match_operand:GPR 0 "register_operand" "=r")
+ (fix:GPR
+ (match_operand:ANYF 1 "register_operand" " f")))]
+ "TARGET_HARD_FLOAT"
+ "fcvt.<GPR:ifmt>.<ANYF:fmt> %0,%1,rtz"
+ [(set_attr "type" "fcvt")
+ (set_attr "mode" "<ANYF:MODE>")])
+
+(define_insn "fixuns_trunc<ANYF:mode><GPR:mode>2"
+ [(set (match_operand:GPR 0 "register_operand" "=r")
+ (unsigned_fix:GPR
+ (match_operand:ANYF 1 "register_operand" " f")))]
+ "TARGET_HARD_FLOAT"
+ "fcvt.<GPR:ifmt>u.<ANYF:fmt> %0,%1,rtz"
+ [(set_attr "type" "fcvt")
+ (set_attr "mode" "<ANYF:MODE>")])
+
+(define_insn "float<GPR:mode><ANYF:mode>2"
+ [(set (match_operand:ANYF 0 "register_operand" "= f")
+ (float:ANYF
+ (match_operand:GPR 1 "reg_or_0_operand" " rJ")))]
+ "TARGET_HARD_FLOAT"
+ "fcvt.<ANYF:fmt>.<GPR:ifmt>\t%0,%z1"
+ [(set_attr "type" "fcvt")
+ (set_attr "mode" "<ANYF:MODE>")])
+
+(define_insn "floatuns<GPR:mode><ANYF:mode>2"
+ [(set (match_operand:ANYF 0 "register_operand" "= f")
+ (unsigned_float:ANYF
+ (match_operand:GPR 1 "reg_or_0_operand" " rJ")))]
+ "TARGET_HARD_FLOAT"
+ "fcvt.<ANYF:fmt>.<GPR:ifmt>u\t%0,%z1"
+ [(set_attr "type" "fcvt")
+ (set_attr "mode" "<ANYF:MODE>")])
+
+(define_insn "l<rint_pattern><ANYF:mode><GPR:mode>2"
+ [(set (match_operand:GPR 0 "register_operand" "=r")
+ (unspec:GPR
+ [(match_operand:ANYF 1 "register_operand" " f")]
+ RINT))]
+ "TARGET_HARD_FLOAT"
+ "fcvt.<GPR:ifmt>.<ANYF:fmt> %0,%1,<rint_rm>"
+ [(set_attr "type" "fcvt")
+ (set_attr "mode" "<ANYF:MODE>")])
+
+;;
+;; ....................
+;;
+;; DATA MOVEMENT
+;;
+;; ....................
+
+;; Lower-level instructions for loading an address from the GOT.
+;; We could use MEMs, but an unspec gives more optimization
+;; opportunities.
+
+(define_insn "got_load<mode>"
+ [(set (match_operand:P 0 "register_operand" "=r")
+ (unspec:P
+ [(match_operand:P 1 "symbolic_operand" "")]
+ UNSPEC_LOAD_GOT))]
+ ""
+ "la\t%0,%1"
+ [(set_attr "got" "load")
+ (set_attr "mode" "<MODE>")])
+
+(define_insn "tls_add_tp_le<mode>"
+ [(set (match_operand:P 0 "register_operand" "=r")
+ (unspec:P
+ [(match_operand:P 1 "register_operand" "r")
+ (match_operand:P 2 "register_operand" "r")
+ (match_operand:P 3 "symbolic_operand" "")]
+ UNSPEC_TLS_LE))]
+ ""
+ "add\t%0,%1,%2,%%tprel_add(%3)"
+ [(set_attr "type" "arith")
+ (set_attr "mode" "<MODE>")])
+
+(define_insn "got_load_tls_gd<mode>"
+ [(set (match_operand:P 0 "register_operand" "=r")
+ (unspec:P
+ [(match_operand:P 1 "symbolic_operand" "")]
+ UNSPEC_TLS_GD))]
+ ""
+ "la.tls.gd\t%0,%1"
+ [(set_attr "got" "load")
+ (set_attr "mode" "<MODE>")])
+
+(define_insn "got_load_tls_ie<mode>"
+ [(set (match_operand:P 0 "register_operand" "=r")
+ (unspec:P
+ [(match_operand:P 1 "symbolic_operand" "")]
+ UNSPEC_TLS_IE))]
+ ""
+ "la.tls.ie\t%0,%1"
+ [(set_attr "got" "load")
+ (set_attr "mode" "<MODE>")])
+
+(define_insn "auipc<mode>"
+ [(set (match_operand:P 0 "register_operand" "=r")
+ (unspec:P
+ [(match_operand:P 1 "symbolic_operand" "")
+ (match_operand:P 2 "const_int_operand")
+ (pc)]
+ UNSPEC_AUIPC))]
+ ""
+ ".LA%2: auipc\t%0,%h1"
+ [(set_attr "type" "arith")
+ (set_attr "cannot_copy" "yes")])
+
+;; Instructions for adding the low 12 bits of an address to a register.
+;; Operand 2 is the address: riscv_print_operand works out which relocation
+;; should be applied.
+
+(define_insn "*low<mode>"
+ [(set (match_operand:P 0 "register_operand" "=r")
+ (lo_sum:P (match_operand:P 1 "register_operand" " r")
+ (match_operand:P 2 "symbolic_operand" "")))]
+ ""
+ "addi\t%0,%1,%R2"
+ [(set_attr "type" "arith")
+ (set_attr "mode" "<MODE>")])
+
+;; Allow combine to split complex const_int load sequences, using operand 2
+;; to store the intermediate results. See move_operand for details.
+(define_split
+ [(set (match_operand:GPR 0 "register_operand")
+ (match_operand:GPR 1 "splittable_const_int_operand"))
+ (clobber (match_operand:GPR 2 "register_operand"))]
+ ""
+ [(const_int 0)]
+{
+ riscv_move_integer (operands[2], operands[0], INTVAL (operands[1]));
+ DONE;
+})
+
+;; Likewise, for symbolic operands.
+(define_split
+ [(set (match_operand:P 0 "register_operand")
+ (match_operand:P 1))
+ (clobber (match_operand:P 2 "register_operand"))]
+ "riscv_split_symbol (operands[2], operands[1], MAX_MACHINE_MODE, NULL)"
+ [(set (match_dup 0) (match_dup 3))]
+{
+ riscv_split_symbol (operands[2], operands[1],
+ MAX_MACHINE_MODE, &operands[3]);
+})
+
+;; 64-bit integer moves
+
+(define_expand "movdi"
+ [(set (match_operand:DI 0 "")
+ (match_operand:DI 1 ""))]
+ ""
+{
+ if (riscv_legitimize_move (DImode, operands[0], operands[1]))
+ DONE;
+})
+
+(define_insn "*movdi_32bit"
+ [(set (match_operand:DI 0 "nonimmediate_operand" "=r,r,r,m, *f,*f,*r,*f,*m")
+ (match_operand:DI 1 "move_operand" " r,i,m,r,*J*r,*m,*f,*f,*f"))]
+ "!TARGET_64BIT
+ && (register_operand (operands[0], DImode)
+ || reg_or_0_operand (operands[1], DImode))"
+ { return riscv_output_move (operands[0], operands[1]); }
+ [(set_attr "move_type" "move,const,load,store,mtc,fpload,mfc,fmove,fpstore")
+ (set_attr "mode" "DI")])
+
+(define_insn "*movdi_64bit"
+ [(set (match_operand:DI 0 "nonimmediate_operand" "=r,r,r, m, *f,*f,*r,*f,*m")
+ (match_operand:DI 1 "move_operand" " r,T,m,rJ,*r*J,*m,*f,*f,*f"))]
+ "TARGET_64BIT
+ && (register_operand (operands[0], DImode)
+ || reg_or_0_operand (operands[1], DImode))"
+ { return riscv_output_move (operands[0], operands[1]); }
+ [(set_attr "move_type" "move,const,load,store,mtc,fpload,mfc,fmove,fpstore")
+ (set_attr "mode" "DI")])
+
+;; 32-bit Integer moves
+
+(define_expand "mov<mode>"
+ [(set (match_operand:MOVE32 0 "")
+ (match_operand:MOVE32 1 ""))]
+ ""
+{
+ if (riscv_legitimize_move (<MODE>mode, operands[0], operands[1]))
+ DONE;
+})
+
+(define_insn "*movsi_internal"
+ [(set (match_operand:SI 0 "nonimmediate_operand" "=r,r,r, m, *f,*f,*r,*m")
+ (match_operand:SI 1 "move_operand" " r,T,m,rJ,*r*J,*m,*f,*f"))]
+ "(register_operand (operands[0], SImode)
+ || reg_or_0_operand (operands[1], SImode))"
+ { return riscv_output_move (operands[0], operands[1]); }
+ [(set_attr "move_type" "move,const,load,store,mtc,fpload,mfc,fpstore")
+ (set_attr "mode" "SI")])
+
+;; 16-bit Integer moves
+
+;; Unlike most other insns, the move insns can't be split with
+;; different predicates, because register spilling and other parts of
+;; the compiler, have memoized the insn number already.
+;; Unsigned loads are used because LOAD_EXTEND_OP returns ZERO_EXTEND.
+
+(define_expand "movhi"
+ [(set (match_operand:HI 0 "")
+ (match_operand:HI 1 ""))]
+ ""
+{
+ if (riscv_legitimize_move (HImode, operands[0], operands[1]))
+ DONE;
+})
+
+(define_insn "*movhi_internal"
+ [(set (match_operand:HI 0 "nonimmediate_operand" "=r,r,r, m, *f,*r")
+ (match_operand:HI 1 "move_operand" " r,T,m,rJ,*r*J,*f"))]
+ "(register_operand (operands[0], HImode)
+ || reg_or_0_operand (operands[1], HImode))"
+ { return riscv_output_move (operands[0], operands[1]); }
+ [(set_attr "move_type" "move,const,load,store,mtc,mfc")
+ (set_attr "mode" "HI")])
+
+;; HImode constant generation; see riscv_move_integer for details.
+;; si+si->hi without truncation is legal because of TRULY_NOOP_TRUNCATION.
+
+(define_insn "*add<mode>hi3"
+ [(set (match_operand:HI 0 "register_operand" "=r,r")
+ (plus:HI (match_operand:HISI 1 "register_operand" " r,r")
+ (match_operand:HISI 2 "arith_operand" " r,I")))]
+ ""
+ { return TARGET_64BIT ? "addw\t%0,%1,%2" : "add\t%0,%1,%2"; }
+ [(set_attr "type" "arith")
+ (set_attr "mode" "HI")])
+
+(define_insn "*xor<mode>hi3"
+ [(set (match_operand:HI 0 "register_operand" "=r,r")
+ (xor:HI (match_operand:HISI 1 "register_operand" " r,r")
+ (match_operand:HISI 2 "arith_operand" " r,I")))]
+ ""
+ "xor\t%0,%1,%2"
+ [(set_attr "type" "logical")
+ (set_attr "mode" "HI")])
+
+;; 8-bit Integer moves
+
+(define_expand "movqi"
+ [(set (match_operand:QI 0 "")
+ (match_operand:QI 1 ""))]
+ ""
+{
+ if (riscv_legitimize_move (QImode, operands[0], operands[1]))
+ DONE;
+})
+
+(define_insn "*movqi_internal"
+ [(set (match_operand:QI 0 "nonimmediate_operand" "=r,r,r, m, *f,*r")
+ (match_operand:QI 1 "move_operand" " r,I,m,rJ,*r*J,*f"))]
+ "(register_operand (operands[0], QImode)
+ || reg_or_0_operand (operands[1], QImode))"
+ { return riscv_output_move (operands[0], operands[1]); }
+ [(set_attr "move_type" "move,const,load,store,mtc,mfc")
+ (set_attr "mode" "QI")])
+
+;; 32-bit floating point moves
+
+(define_expand "movsf"
+ [(set (match_operand:SF 0 "")
+ (match_operand:SF 1 ""))]
+ ""
+{
+ if (riscv_legitimize_move (SFmode, operands[0], operands[1]))
+ DONE;
+})
+
+(define_insn "*movsf_hardfloat"
+ [(set (match_operand:SF 0 "nonimmediate_operand" "=f,f,f,m,m,*f,*r, *r,*r,*m")
+ (match_operand:SF 1 "move_operand" " f,G,m,f,G,*r,*f,*G*r,*m,*r"))]
+ "TARGET_HARD_FLOAT
+ && (register_operand (operands[0], SFmode)
+ || reg_or_0_operand (operands[1], SFmode))"
+ { return riscv_output_move (operands[0], operands[1]); }
+ [(set_attr "move_type" "fmove,mtc,fpload,fpstore,store,mtc,mfc,move,load,store")
+ (set_attr "mode" "SF")])
+
+(define_insn "*movsf_softfloat"
+ [(set (match_operand:SF 0 "nonimmediate_operand" "= r,r,m")
+ (match_operand:SF 1 "move_operand" " Gr,m,r"))]
+ "!TARGET_HARD_FLOAT
+ && (register_operand (operands[0], SFmode)
+ || reg_or_0_operand (operands[1], SFmode))"
+ { return riscv_output_move (operands[0], operands[1]); }
+ [(set_attr "move_type" "move,load,store")
+ (set_attr "mode" "SF")])
+
+;; 64-bit floating point moves
+
+(define_expand "movdf"
+ [(set (match_operand:DF 0 "")
+ (match_operand:DF 1 ""))]
+ ""
+{
+ if (riscv_legitimize_move (DFmode, operands[0], operands[1]))
+ DONE;
+})
+
+;; In RV32, we lack fmv.x.d and fmv.d.x. Go through memory instead.
+;; (However, we can still use fcvt.d.w to zero a floating-point register.)
+(define_insn "*movdf_hardfloat_rv32"
+ [(set (match_operand:DF 0 "nonimmediate_operand" "=f,f,f,m,m, *r,*r,*m")
+ (match_operand:DF 1 "move_operand" " f,G,m,f,G,*r*G,*m,*r"))]
+ "!TARGET_64BIT && TARGET_DOUBLE_FLOAT
+ && (register_operand (operands[0], DFmode)
+ || reg_or_0_operand (operands[1], DFmode))"
+ { return riscv_output_move (operands[0], operands[1]); }
+ [(set_attr "move_type" "fmove,mtc,fpload,fpstore,store,move,load,store")
+ (set_attr "mode" "DF")])
+
+(define_insn "*movdf_hardfloat_rv64"
+ [(set (match_operand:DF 0 "nonimmediate_operand" "=f,f,f,m,m,*f,*r, *r,*r,*m")
+ (match_operand:DF 1 "move_operand" " f,G,m,f,G,*r,*f,*r*G,*m,*r"))]
+ "TARGET_64BIT && TARGET_DOUBLE_FLOAT
+ && (register_operand (operands[0], DFmode)
+ || reg_or_0_operand (operands[1], DFmode))"
+ { return riscv_output_move (operands[0], operands[1]); }
+ [(set_attr "move_type" "fmove,mtc,fpload,fpstore,store,mtc,mfc,move,load,store")
+ (set_attr "mode" "DF")])
+
+(define_insn "*movdf_softfloat"
+ [(set (match_operand:DF 0 "nonimmediate_operand" "= r,r, m")
+ (match_operand:DF 1 "move_operand" " rG,m,rG"))]
+ "!TARGET_DOUBLE_FLOAT
+ && (register_operand (operands[0], DFmode)
+ || reg_or_0_operand (operands[1], DFmode))"
+ { return riscv_output_move (operands[0], operands[1]); }
+ [(set_attr "move_type" "move,load,store")
+ (set_attr "mode" "DF")])
+
+(define_split
+ [(set (match_operand:MOVE64 0 "nonimmediate_operand")
+ (match_operand:MOVE64 1 "move_operand"))]
+ "reload_completed
+ && riscv_split_64bit_move_p (operands[0], operands[1])"
+ [(const_int 0)]
+{
+ riscv_split_doubleword_move (operands[0], operands[1]);
+ DONE;
+})
+
+;; Expand in-line code to clear the instruction cache between operand[0] and
+;; operand[1].
+(define_expand "clear_cache"
+ [(match_operand 0 "pmode_register_operand")
+ (match_operand 1 "pmode_register_operand")]
+ ""
+{
+ emit_insn (gen_fence_i ());
+ DONE;
+})
+
+(define_insn "fence"
+ [(unspec_volatile [(const_int 0)] UNSPECV_FENCE)]
+ ""
+ "%|fence%-")
+
+(define_insn "fence_i"
+ [(unspec_volatile [(const_int 0)] UNSPECV_FENCE_I)]
+ ""
+ "fence.i")
+
+;;
+;; ....................
+;;
+;; SHIFTS
+;;
+;; ....................
+
+(define_insn "<optab>si3"
+ [(set (match_operand:SI 0 "register_operand" "= r")
+ (any_shift:SI
+ (match_operand:SI 1 "register_operand" " r")
+ (match_operand:SI 2 "arith_operand" " rI")))]
+ ""
+{
+ if (GET_CODE (operands[2]) == CONST_INT)
+ operands[2] = GEN_INT (INTVAL (operands[2])
+ & (GET_MODE_BITSIZE (SImode) - 1));
+
+ return TARGET_64BIT ? "<insn>w\t%0,%1,%2" : "<insn>\t%0,%1,%2";
+}
+ [(set_attr "type" "shift")
+ (set_attr "mode" "SI")])
+
+(define_insn "<optab>di3"
+ [(set (match_operand:DI 0 "register_operand" "= r")
+ (any_shift:DI
+ (match_operand:DI 1 "register_operand" " r")
+ (match_operand:DI 2 "arith_operand" " rI")))]
+ "TARGET_64BIT"
+{
+ if (GET_CODE (operands[2]) == CONST_INT)
+ operands[2] = GEN_INT (INTVAL (operands[2])
+ & (GET_MODE_BITSIZE (DImode) - 1));
+
+ return "<insn>\t%0,%1,%2";
+}
+ [(set_attr "type" "shift")
+ (set_attr "mode" "DI")])
+
+(define_insn "*<optab>si3_extend"
+ [(set (match_operand:DI 0 "register_operand" "= r")
+ (sign_extend:DI
+ (any_shift:SI (match_operand:SI 1 "register_operand" " r")
+ (match_operand:SI 2 "arith_operand" " rI"))))]
+ "TARGET_64BIT"
+{
+ if (GET_CODE (operands[2]) == CONST_INT)
+ operands[2] = GEN_INT (INTVAL (operands[2]) & 0x1f);
+
+ return "<insn>w\t%0,%1,%2";
+}
+ [(set_attr "type" "shift")
+ (set_attr "mode" "SI")])
+
+;;
+;; ....................
+;;
+;; CONDITIONAL BRANCHES
+;;
+;; ....................
+
+;; Conditional branches
+
+(define_insn "*branch_order<mode>"
+ [(set (pc)
+ (if_then_else
+ (match_operator 1 "order_operator"
+ [(match_operand:X 2 "register_operand" "r")
+ (match_operand:X 3 "register_operand" "r")])
+ (label_ref (match_operand 0 "" ""))
+ (pc)))]
+ ""
+ "b%C1\t%2,%3,%0"
+ [(set_attr "type" "branch")
+ (set_attr "mode" "none")])
+
+(define_insn "*branch_zero<mode>"
+ [(set (pc)
+ (if_then_else
+ (match_operator 1 "signed_order_operator"
+ [(match_operand:X 2 "register_operand" "r")
+ (const_int 0)])
+ (label_ref (match_operand 0 "" ""))
+ (pc)))]
+ ""
+ "b%C1z\t%2,%0"
+ [(set_attr "type" "branch")
+ (set_attr "mode" "none")])
+
+;; Used to implement built-in functions.
+(define_expand "condjump"
+ [(set (pc)
+ (if_then_else (match_operand 0)
+ (label_ref (match_operand 1))
+ (pc)))])
+
+(define_expand "cbranch<mode>4"
+ [(set (pc)
+ (if_then_else (match_operator 0 "comparison_operator"
+ [(match_operand:BR 1 "register_operand")
+ (match_operand:BR 2 "nonmemory_operand")])
+ (label_ref (match_operand 3 ""))
+ (pc)))]
+ ""
+{
+ riscv_expand_conditional_branch (operands[3], GET_CODE (operands[0]),
+ operands[1], operands[2]);
+ DONE;
+})
+
+(define_expand "cbranch<mode>4"
+ [(set (pc)
+ (if_then_else (match_operator 0 "fp_branch_comparison"
+ [(match_operand:ANYF 1 "register_operand")
+ (match_operand:ANYF 2 "register_operand")])
+ (label_ref (match_operand 3 ""))
+ (pc)))]
+ "TARGET_HARD_FLOAT"
+{
+ riscv_expand_conditional_branch (operands[3], GET_CODE (operands[0]),
+ operands[1], operands[2]);
+ DONE;
+})
+
+(define_insn_and_split "*branch_on_bit<X:mode>"
+ [(set (pc)
+ (if_then_else
+ (match_operator 0 "equality_operator"
+ [(zero_extract:X (match_operand:X 2 "register_operand" "r")
+ (const_int 1)
+ (match_operand 3 "branch_on_bit_operand"))
+ (const_int 0)])
+ (label_ref (match_operand 1))
+ (pc)))
+ (clobber (match_scratch:X 4 "=&r"))]
+ ""
+ "#"
+ "reload_completed"
+ [(set (match_dup 4)
+ (ashift:X (match_dup 2) (match_dup 3)))
+ (set (pc)
+ (if_then_else
+ (match_op_dup 0 [(match_dup 4) (const_int 0)])
+ (label_ref (match_operand 1))
+ (pc)))]
+{
+ int shift = GET_MODE_BITSIZE (<MODE>mode) - 1 - INTVAL (operands[3]);
+ operands[3] = GEN_INT (shift);
+
+ if (GET_CODE (operands[0]) == EQ)
+ operands[0] = gen_rtx_GE (<MODE>mode, operands[4], const0_rtx);
+ else
+ operands[0] = gen_rtx_LT (<MODE>mode, operands[4], const0_rtx);
+})
+
+(define_insn_and_split "*branch_on_bit_range<X:mode>"
+ [(set (pc)
+ (if_then_else
+ (match_operator 0 "equality_operator"
+ [(zero_extract:X (match_operand:X 2 "register_operand" "r")
+ (match_operand 3 "branch_on_bit_operand")
+ (const_int 0))
+ (const_int 0)])
+ (label_ref (match_operand 1))
+ (pc)))
+ (clobber (match_scratch:X 4 "=&r"))]
+ ""
+ "#"
+ "reload_completed"
+ [(set (match_dup 4)
+ (ashift:X (match_dup 2) (match_dup 3)))
+ (set (pc)
+ (if_then_else
+ (match_op_dup 0 [(match_dup 4) (const_int 0)])
+ (label_ref (match_operand 1))
+ (pc)))]
+{
+ operands[3] = GEN_INT (GET_MODE_BITSIZE (<MODE>mode) - INTVAL (operands[3]));
+})
+
+;;
+;; ....................
+;;
+;; SETTING A REGISTER FROM A COMPARISON
+;;
+;; ....................
+
+;; Destination is always set in SI mode.
+
+(define_expand "cstore<mode>4"
+ [(set (match_operand:SI 0 "register_operand")
+ (match_operator:SI 1 "order_operator"
+ [(match_operand:GPR 2 "register_operand")
+ (match_operand:GPR 3 "nonmemory_operand")]))]
+ ""
+{
+ riscv_expand_int_scc (operands[0], GET_CODE (operands[1]), operands[2],
+ operands[3]);
+ DONE;
+})
+
+(define_expand "cstore<mode>4"
+ [(set (match_operand:SI 0 "register_operand")
+ (match_operator:SI 1 "fp_scc_comparison"
+ [(match_operand:ANYF 2 "register_operand")
+ (match_operand:ANYF 3 "register_operand")]))]
+ "TARGET_HARD_FLOAT"
+{
+ riscv_expand_float_scc (operands[0], GET_CODE (operands[1]), operands[2],
+ operands[3]);
+ DONE;
+})
+
+(define_insn "*cstore<ANYF:mode><X:mode>4"
+ [(set (match_operand:X 0 "register_operand" "=r")
+ (match_operator:X 1 "fp_native_comparison"
+ [(match_operand:ANYF 2 "register_operand" " f")
+ (match_operand:ANYF 3 "register_operand" " f")]))]
+ "TARGET_HARD_FLOAT"
+ "f%C1.<fmt>\t%0,%2,%3"
+ [(set_attr "type" "fcmp")
+ (set_attr "mode" "<UNITMODE>")])
+
+(define_insn "f<quiet_pattern>_quiet<ANYF:mode><X:mode>4"
+ [(set (match_operand:X 0 "register_operand" "=r")
+ (unspec:X
+ [(match_operand:ANYF 1 "register_operand" " f")
+ (match_operand:ANYF 2 "register_operand" " f")]
+ QUIET_COMPARISON))
+ (clobber (match_scratch:X 3 "=&r"))]
+ "TARGET_HARD_FLOAT"
+ "frflags\t%3\n\tf<quiet_pattern>.<fmt>\t%0,%1,%2\n\tfsflags %3"
+ [(set_attr "type" "fcmp")
+ (set_attr "mode" "<UNITMODE>")
+ (set (attr "length") (const_int 12))])
+
+(define_insn "*seq_zero_<X:mode><GPR:mode>"
+ [(set (match_operand:GPR 0 "register_operand" "=r")
+ (eq:GPR (match_operand:X 1 "register_operand" " r")
+ (const_int 0)))]
+ ""
+ "seqz\t%0,%1"
+ [(set_attr "type" "slt")
+ (set_attr "mode" "<X:MODE>")])
+
+(define_insn "*sne_zero_<X:mode><GPR:mode>"
+ [(set (match_operand:GPR 0 "register_operand" "=r")
+ (ne:GPR (match_operand:X 1 "register_operand" " r")
+ (const_int 0)))]
+ ""
+ "snez\t%0,%1"
+ [(set_attr "type" "slt")
+ (set_attr "mode" "<X:MODE>")])
+
+(define_insn "*sgt<u>_<X:mode><GPR:mode>"
+ [(set (match_operand:GPR 0 "register_operand" "= r")
+ (any_gt:GPR (match_operand:X 1 "register_operand" " r")
+ (match_operand:X 2 "reg_or_0_operand" " rJ")))]
+ ""
+ "sgt<u>\t%0,%1,%z2"
+ [(set_attr "type" "slt")
+ (set_attr "mode" "<X:MODE>")])
+
+(define_insn "*sge<u>_<X:mode><GPR:mode>"
+ [(set (match_operand:GPR 0 "register_operand" "=r")
+ (any_ge:GPR (match_operand:X 1 "register_operand" " r")
+ (const_int 1)))]
+ ""
+ "slt<u>\t%0,zero,%1"
+ [(set_attr "type" "slt")
+ (set_attr "mode" "<MODE>")])
+
+(define_insn "*slt<u>_<X:mode><GPR:mode>"
+ [(set (match_operand:GPR 0 "register_operand" "= r")
+ (any_lt:GPR (match_operand:X 1 "register_operand" " r")
+ (match_operand:X 2 "arith_operand" " rI")))]
+ ""
+ "slt<u>\t%0,%1,%2"
+ [(set_attr "type" "slt")
+ (set_attr "mode" "<MODE>")])
+
+(define_insn "*sle<u>_<X:mode><GPR:mode>"
+ [(set (match_operand:GPR 0 "register_operand" "=r")
+ (any_le:GPR (match_operand:X 1 "register_operand" " r")
+ (match_operand:X 2 "sle_operand" "")))]
+ ""
+{
+ operands[2] = GEN_INT (INTVAL (operands[2]) + 1);
+ return "slt<u>\t%0,%1,%2";
+}
+ [(set_attr "type" "slt")
+ (set_attr "mode" "<MODE>")])
+
+;;
+;; ....................
+;;
+;; UNCONDITIONAL BRANCHES
+;;
+;; ....................
+
+;; Unconditional branches.
+
+(define_insn "jump"
+ [(set (pc)
+ (label_ref (match_operand 0 "" "")))]
+ ""
+ "j\t%l0"
+ [(set_attr "type" "jump")
+ (set_attr "mode" "none")])
+
+(define_expand "indirect_jump"
+ [(set (pc) (match_operand 0 "register_operand"))]
+ ""
+{
+ operands[0] = force_reg (Pmode, operands[0]);
+ if (Pmode == SImode)
+ emit_jump_insn (gen_indirect_jumpsi (operands[0]));
+ else
+ emit_jump_insn (gen_indirect_jumpdi (operands[0]));
+ DONE;
+})
+
+(define_insn "indirect_jump<mode>"
+ [(set (pc) (match_operand:P 0 "register_operand" "l"))]
+ ""
+ "jr\t%0"
+ [(set_attr "type" "jump")
+ (set_attr "mode" "none")])
+
+(define_expand "tablejump"
+ [(set (pc) (match_operand 0 "register_operand" ""))
+ (use (label_ref (match_operand 1 "" "")))]
+ ""
+{
+ if (CASE_VECTOR_PC_RELATIVE)
+ operands[0] = expand_simple_binop (Pmode, PLUS, operands[0],
+ gen_rtx_LABEL_REF (Pmode, operands[1]),
+ NULL_RTX, 0, OPTAB_DIRECT);
+
+ if (CASE_VECTOR_PC_RELATIVE && Pmode == DImode)
+ emit_jump_insn (gen_tablejumpdi (operands[0], operands[1]));
+ else
+ emit_jump_insn (gen_tablejumpsi (operands[0], operands[1]));
+ DONE;
+})
+
+(define_insn "tablejump<mode>"
+ [(set (pc) (match_operand:GPR 0 "register_operand" "l"))
+ (use (label_ref (match_operand 1 "" "")))]
+ ""
+ "jr\t%0"
+ [(set_attr "type" "jump")
+ (set_attr "mode" "none")])
+
+;;
+;; ....................
+;;
+;; Function prologue/epilogue
+;;
+;; ....................
+;;
+
+(define_expand "prologue"
+ [(const_int 1)]
+ ""
+{
+ riscv_expand_prologue ();
+ DONE;
+})
+
+;; Block any insns from being moved before this point, since the
+;; profiling call to mcount can use various registers that aren't
+;; saved or used to pass arguments.
+
+(define_insn "blockage"
+ [(unspec_volatile [(const_int 0)] UNSPECV_BLOCKAGE)]
+ ""
+ ""
+ [(set_attr "type" "ghost")
+ (set_attr "mode" "none")])
+
+(define_expand "epilogue"
+ [(const_int 2)]
+ ""
+{
+ riscv_expand_epilogue (false);
+ DONE;
+})
+
+(define_expand "sibcall_epilogue"
+ [(const_int 2)]
+ ""
+{
+ riscv_expand_epilogue (true);
+ DONE;
+})
+
+;; Trivial return. Make it look like a normal return insn as that
+;; allows jump optimizations to work better.
+
+(define_expand "return"
+ [(simple_return)]
+ "riscv_can_use_return_insn ()"
+ "")
+
+(define_insn "simple_return"
+ [(simple_return)]
+ ""
+ "ret"
+ [(set_attr "type" "jump")
+ (set_attr "mode" "none")])
+
+;; Normal return.
+
+(define_insn "simple_return_internal"
+ [(simple_return)
+ (use (match_operand 0 "pmode_register_operand" ""))]
+ ""
+ "jr\t%0"
+ [(set_attr "type" "jump")
+ (set_attr "mode" "none")])
+
+;; This is used in compiling the unwind routines.
+(define_expand "eh_return"
+ [(use (match_operand 0 "general_operand"))]
+ ""
+{
+ if (GET_MODE (operands[0]) != word_mode)
+ operands[0] = convert_to_mode (word_mode, operands[0], 0);
+ if (TARGET_64BIT)
+ emit_insn (gen_eh_set_lr_di (operands[0]));
+ else
+ emit_insn (gen_eh_set_lr_si (operands[0]));
+ DONE;
+})
+
+;; Clobber the return address on the stack. We can't expand this
+;; until we know where it will be put in the stack frame.
+
+(define_insn "eh_set_lr_si"
+ [(unspec [(match_operand:SI 0 "register_operand" "r")] UNSPEC_EH_RETURN)
+ (clobber (match_scratch:SI 1 "=&r"))]
+ "! TARGET_64BIT"
+ "#")
+
+(define_insn "eh_set_lr_di"
+ [(unspec [(match_operand:DI 0 "register_operand" "r")] UNSPEC_EH_RETURN)
+ (clobber (match_scratch:DI 1 "=&r"))]
+ "TARGET_64BIT"
+ "#")
+
+(define_split
+ [(unspec [(match_operand 0 "register_operand")] UNSPEC_EH_RETURN)
+ (clobber (match_scratch 1))]
+ "reload_completed"
+ [(const_int 0)]
+{
+ riscv_set_return_address (operands[0], operands[1]);
+ DONE;
+})
+
+;;
+;; ....................
+;;
+;; FUNCTION CALLS
+;;
+;; ....................
+
+(define_expand "sibcall"
+ [(parallel [(call (match_operand 0 "")
+ (match_operand 1 ""))
+ (use (match_operand 2 "")) ;; next_arg_reg
+ (use (match_operand 3 ""))])] ;; struct_value_size_rtx
+ ""
+{
+ rtx target = riscv_legitimize_call_address (XEXP (operands[0], 0));
+ emit_call_insn (gen_sibcall_internal (target, operands[1]));
+ DONE;
+})
+
+(define_insn "sibcall_internal"
+ [(call (mem:SI (match_operand 0 "call_insn_operand" "j,S,U"))
+ (match_operand 1 "" ""))]
+ "SIBLING_CALL_P (insn)"
+ "@
+ jr\t%0
+ tail\t%0
+ tail\t%0@plt"
+ [(set_attr "type" "call")])
+
+(define_expand "sibcall_value"
+ [(parallel [(set (match_operand 0 "")
+ (call (match_operand 1 "")
+ (match_operand 2 "")))
+ (use (match_operand 3 ""))])] ;; next_arg_reg
+ ""
+{
+ rtx target = riscv_legitimize_call_address (XEXP (operands[1], 0));
+ emit_call_insn (gen_sibcall_value_internal (operands[0], target, operands[2]));
+ DONE;
+})
+
+(define_insn "sibcall_value_internal"
+ [(set (match_operand 0 "" "")
+ (call (mem:SI (match_operand 1 "call_insn_operand" "j,S,U"))
+ (match_operand 2 "" "")))]
+ "SIBLING_CALL_P (insn)"
+ "@
+ jr\t%1
+ tail\t%1
+ tail\t%1@plt"
+ [(set_attr "type" "call")])
+
+(define_expand "call"
+ [(parallel [(call (match_operand 0 "")
+ (match_operand 1 ""))
+ (use (match_operand 2 "")) ;; next_arg_reg
+ (use (match_operand 3 ""))])] ;; struct_value_size_rtx
+ ""
+{
+ rtx target = riscv_legitimize_call_address (XEXP (operands[0], 0));
+ emit_call_insn (gen_call_internal (target, operands[1]));
+ DONE;
+})
+
+(define_insn "call_internal"
+ [(call (mem:SI (match_operand 0 "call_insn_operand" "l,S,U"))
+ (match_operand 1 "" ""))
+ (clobber (reg:SI RETURN_ADDR_REGNUM))]
+ ""
+ "@
+ jalr\t%0
+ call\t%0
+ call\t%0@plt"
+ [(set_attr "type" "call")])
+
+(define_expand "call_value"
+ [(parallel [(set (match_operand 0 "")
+ (call (match_operand 1 "")
+ (match_operand 2 "")))
+ (use (match_operand 3 ""))])] ;; next_arg_reg
+ ""
+{
+ rtx target = riscv_legitimize_call_address (XEXP (operands[1], 0));
+ emit_call_insn (gen_call_value_internal (operands[0], target, operands[2]));
+ DONE;
+})
+
+(define_insn "call_value_internal"
+ [(set (match_operand 0 "" "")
+ (call (mem:SI (match_operand 1 "call_insn_operand" "l,S,U"))
+ (match_operand 2 "" "")))
+ (clobber (reg:SI RETURN_ADDR_REGNUM))]
+ ""
+ "@
+ jalr\t%1
+ call\t%1
+ call\t%1@plt"
+ [(set_attr "type" "call")])
+
+;; Call subroutine returning any type.
+
+(define_expand "untyped_call"
+ [(parallel [(call (match_operand 0 "")
+ (const_int 0))
+ (match_operand 1 "")
+ (match_operand 2 "")])]
+ ""
+{
+ int i;
+
+ emit_call_insn (gen_call (operands[0], const0_rtx, NULL, const0_rtx));
+
+ for (i = 0; i < XVECLEN (operands[2], 0); i++)
+ {
+ rtx set = XVECEXP (operands[2], 0, i);
+ riscv_emit_move (SET_DEST (set), SET_SRC (set));
+ }
+
+ emit_insn (gen_blockage ());
+ DONE;
+})
+
+(define_insn "nop"
+ [(const_int 0)]
+ ""
+ "nop"
+ [(set_attr "type" "nop")
+ (set_attr "mode" "none")])
+
+(define_insn "trap"
+ [(trap_if (const_int 1) (const_int 0))]
+ ""
+ "ebreak")
+
+(define_insn "gpr_save"
+ [(unspec_volatile [(match_operand 0 "const_int_operand")] UNSPECV_GPR_SAVE)
+ (clobber (reg:SI T0_REGNUM))
+ (clobber (reg:SI T1_REGNUM))]
+ ""
+ { return riscv_output_gpr_save (INTVAL (operands[0])); })
+
+(define_insn "gpr_restore"
+ [(unspec_volatile [(match_operand 0 "const_int_operand")] UNSPECV_GPR_RESTORE)]
+ ""
+ "tail\t__riscv_restore_%0")
+
+(define_insn "gpr_restore_return"
+ [(return)
+ (use (match_operand 0 "pmode_register_operand" ""))
+ (const_int 0)]
+ ""
+ "")
+
+(define_insn "riscv_frflags"
+ [(set (match_operand:SI 0 "register_operand" "=r")
+ (unspec_volatile [(const_int 0)] UNSPECV_FRFLAGS))]
+ "TARGET_HARD_FLOAT"
+ "frflags %0")
+
+(define_insn "riscv_fsflags"
+ [(unspec_volatile [(match_operand:SI 0 "csr_operand" "rK")] UNSPECV_FSFLAGS)]
+ "TARGET_HARD_FLOAT"
+ "fsflags %0")
+
+(define_insn "stack_tie<mode>"
+ [(set (mem:BLK (scratch))
+ (unspec:BLK [(match_operand:X 0 "register_operand" "r")
+ (match_operand:X 1 "register_operand" "r")]
+ UNSPEC_TIE))]
+ ""
+ ""
+ [(set_attr "length" "0")]
+)
+
+(include "sync.md")
+(include "peephole.md")
+(include "pic.md")
+(include "generic.md")
diff --git a/gcc/config/riscv/riscv.opt b/gcc/config/riscv/riscv.opt
new file mode 100644
index 0000000..0466bb2
--- /dev/null
+++ b/gcc/config/riscv/riscv.opt
@@ -0,0 +1,111 @@
+; Options for the RISC-V port of the compiler
+;
+; Copyright (C) 2011-2017 Free Software Foundation, Inc.
+;
+; This file is part of GCC.
+;
+; GCC is free software; you can redistribute it and/or modify it under
+; the terms of the GNU General Public License as published by the Free
+; Software Foundation; either version 3, or (at your option) any later
+; version.
+;
+; GCC is distributed in the hope that it will be useful, but WITHOUT
+; ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+; or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
+; License for more details.
+;
+; You should have received a copy of the GNU General Public License
+; along with GCC; see the file COPYING3. If not see
+; <http://www.gnu.org/licenses/>.
+
+HeaderInclude
+config/riscv/riscv-opts.h
+
+mbranch-cost=
+Target RejectNegative Joined UInteger Var(riscv_branch_cost)
+-mbranch-cost=N Set the cost of branches to roughly N instructions.
+
+mplt
+Target Report Var(TARGET_PLT) Init(1)
+When generating -fpic code, allow the use of PLTs. Ignored for fno-pic.
+
+mabi=
+Target Report RejectNegative Joined Enum(abi_type) Var(riscv_abi) Init(ABI_ILP32)
+Specify integer and floating-point calling convention.
+
+Enum
+Name(abi_type) Type(enum riscv_abi_type)
+Supported ABIs (for use with the -mabi= option):
+
+EnumValue
+Enum(abi_type) String(ilp32) Value(ABI_ILP32)
+
+EnumValue
+Enum(abi_type) String(ilp32f) Value(ABI_ILP32F)
+
+EnumValue
+Enum(abi_type) String(ilp32d) Value(ABI_ILP32D)
+
+EnumValue
+Enum(abi_type) String(lp64) Value(ABI_LP64)
+
+EnumValue
+Enum(abi_type) String(lp64f) Value(ABI_LP64F)
+
+EnumValue
+Enum(abi_type) String(lp64d) Value(ABI_LP64D)
+
+mfdiv
+Target Report Mask(FDIV)
+Use hardware floating-point divide and square root instructions.
+
+mdiv
+Target Report Mask(DIV)
+Use hardware instructions for integer division.
+
+march=
+Target Report RejectNegative Joined
+-march= Generate code for given RISC-V ISA (e.g. RV64IM). ISA strings must be
+lower-case.
+
+mtune=
+Target RejectNegative Joined Var(riscv_tune_string)
+-mtune=PROCESSOR Optimize the output for PROCESSOR.
+
+msmall-data-limit=
+Target Joined Separate UInteger Var(g_switch_value) Init(8)
+-msmall-data-limit=N Put global and static data smaller than <number> bytes into a special section (on some targets).
+
+msave-restore
+Target Report Mask(SAVE_RESTORE)
+Use smaller but slower prologue and epilogue code.
+
+mcmodel=
+Target Report RejectNegative Joined Enum(code_model) Var(riscv_cmodel) Init(TARGET_DEFAULT_CMODEL)
+Specify the code model.
+
+Enum
+Name(code_model) Type(enum riscv_code_model)
+Known code models (for use with the -mcmodel= option):
+
+EnumValue
+Enum(code_model) String(medlow) Value(CM_MEDLOW)
+
+EnumValue
+Enum(code_model) String(medany) Value(CM_MEDANY)
+
+mexplicit-relocs
+Target Report Mask(EXPLICIT_RELOCS)
+Use %reloc() operators, rather than assembly macros, to load addresses.
+
+Mask(64BIT)
+
+Mask(MUL)
+
+Mask(ATOMIC)
+
+Mask(HARD_FLOAT)
+
+Mask(DOUBLE_FLOAT)
+
+Mask(RVC)
diff --git a/gcc/config/riscv/sync.md b/gcc/config/riscv/sync.md
new file mode 100644
index 0000000..cde19e3
--- /dev/null
+++ b/gcc/config/riscv/sync.md
@@ -0,0 +1,194 @@
+;; Machine description for RISC-V atomic operations.
+;; Copyright (C) 2011-2017 Free Software Foundation, Inc.
+;; Contributed by Andrew Waterman (andrew@sifive.com).
+;; Based on MIPS target for GNU compiler.
+
+;; This file is part of GCC.
+
+;; GCC is free software; you can redistribute it and/or modify
+;; it under the terms of the GNU General Public License as published by
+;; the Free Software Foundation; either version 3, or (at your option)
+;; any later version.
+
+;; GCC is distributed in the hope that it will be useful,
+;; but WITHOUT ANY WARRANTY; without even the implied warranty of
+;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+;; GNU General Public License for more details.
+
+;; You should have received a copy of the GNU General Public License
+;; along with GCC; see the file COPYING3. If not see
+;; <http://www.gnu.org/licenses/>.
+
+(define_c_enum "unspec" [
+ UNSPEC_COMPARE_AND_SWAP
+ UNSPEC_SYNC_OLD_OP
+ UNSPEC_SYNC_EXCHANGE
+ UNSPEC_ATOMIC_STORE
+ UNSPEC_MEMORY_BARRIER
+])
+
+(define_code_iterator any_atomic [plus ior xor and])
+(define_code_attr atomic_optab
+ [(plus "add") (ior "or") (xor "xor") (and "and")])
+
+;; Memory barriers.
+
+(define_expand "mem_thread_fence"
+ [(match_operand:SI 0 "const_int_operand" "")] ;; model
+ ""
+{
+ if (INTVAL (operands[0]) != MEMMODEL_RELAXED)
+ {
+ rtx mem = gen_rtx_MEM (BLKmode, gen_rtx_SCRATCH (Pmode));
+ MEM_VOLATILE_P (mem) = 1;
+ emit_insn (gen_mem_thread_fence_1 (mem, operands[0]));
+ }
+ DONE;
+})
+
+;; Until the RISC-V memory model (hence its mapping from C++) is finalized,
+;; conservatively emit a full FENCE.
+(define_insn "mem_thread_fence_1"
+ [(set (match_operand:BLK 0 "" "")
+ (unspec:BLK [(match_dup 0)] UNSPEC_MEMORY_BARRIER))
+ (match_operand:SI 1 "const_int_operand" "")] ;; model
+ ""
+ "fence\tiorw,iorw")
+
+;; Atomic memory operations.
+
+;; Implement atomic stores with amoswap. Fall back to fences for atomic loads.
+(define_insn "atomic_store<mode>"
+ [(set (match_operand:GPR 0 "memory_operand" "=A")
+ (unspec_volatile:GPR
+ [(match_operand:GPR 1 "reg_or_0_operand" "rJ")
+ (match_operand:SI 2 "const_int_operand")] ;; model
+ UNSPEC_ATOMIC_STORE))]
+ "TARGET_ATOMIC"
+ "%F2amoswap.<amo>%A2 zero,%z1,%0"
+ [(set (attr "length") (const_int 8))])
+
+(define_insn "atomic_<atomic_optab><mode>"
+ [(set (match_operand:GPR 0 "memory_operand" "+A")
+ (unspec_volatile:GPR
+ [(any_atomic:GPR (match_dup 0)
+ (match_operand:GPR 1 "reg_or_0_operand" "rJ"))
+ (match_operand:SI 2 "const_int_operand")] ;; model
+ UNSPEC_SYNC_OLD_OP))]
+ "TARGET_ATOMIC"
+ "%F2amo<insn>.<amo>%A2 zero,%z1,%0"
+ [(set (attr "length") (const_int 8))])
+
+(define_insn "atomic_fetch_<atomic_optab><mode>"
+ [(set (match_operand:GPR 0 "register_operand" "=&r")
+ (match_operand:GPR 1 "memory_operand" "+A"))
+ (set (match_dup 1)
+ (unspec_volatile:GPR
+ [(any_atomic:GPR (match_dup 1)
+ (match_operand:GPR 2 "reg_or_0_operand" "rJ"))
+ (match_operand:SI 3 "const_int_operand")] ;; model
+ UNSPEC_SYNC_OLD_OP))]
+ "TARGET_ATOMIC"
+ "%F3amo<insn>.<amo>%A3 %0,%z2,%1"
+ [(set (attr "length") (const_int 8))])
+
+(define_insn "atomic_exchange<mode>"
+ [(set (match_operand:GPR 0 "register_operand" "=&r")
+ (unspec_volatile:GPR
+ [(match_operand:GPR 1 "memory_operand" "+A")
+ (match_operand:SI 3 "const_int_operand")] ;; model
+ UNSPEC_SYNC_EXCHANGE))
+ (set (match_dup 1)
+ (match_operand:GPR 2 "register_operand" "0"))]
+ "TARGET_ATOMIC"
+ "%F3amoswap.<amo>%A3 %0,%z2,%1"
+ [(set (attr "length") (const_int 8))])
+
+(define_insn "atomic_cas_value_strong<mode>"
+ [(set (match_operand:GPR 0 "register_operand" "=&r")
+ (match_operand:GPR 1 "memory_operand" "+A"))
+ (set (match_dup 1)
+ (unspec_volatile:GPR [(match_operand:GPR 2 "reg_or_0_operand" "rJ")
+ (match_operand:GPR 3 "reg_or_0_operand" "rJ")
+ (match_operand:SI 4 "const_int_operand") ;; mod_s
+ (match_operand:SI 5 "const_int_operand")] ;; mod_f
+ UNSPEC_COMPARE_AND_SWAP))
+ (clobber (match_scratch:GPR 6 "=&r"))]
+ "TARGET_ATOMIC"
+ "%F5 1: lr.<amo>%A5 %0,%1; bne %0,%z2,1f; sc.<amo>%A4 %6,%z3,%1; bnez %6,1b; 1:"
+ [(set (attr "length") (const_int 20))])
+
+(define_expand "atomic_compare_and_swap<mode>"
+ [(match_operand:SI 0 "register_operand" "") ;; bool output
+ (match_operand:GPR 1 "register_operand" "") ;; val output
+ (match_operand:GPR 2 "memory_operand" "") ;; memory
+ (match_operand:GPR 3 "reg_or_0_operand" "") ;; expected value
+ (match_operand:GPR 4 "reg_or_0_operand" "") ;; desired value
+ (match_operand:SI 5 "const_int_operand" "") ;; is_weak
+ (match_operand:SI 6 "const_int_operand" "") ;; mod_s
+ (match_operand:SI 7 "const_int_operand" "")] ;; mod_f
+ "TARGET_ATOMIC"
+{
+ emit_insn (gen_atomic_cas_value_strong<mode> (operands[1], operands[2],
+ operands[3], operands[4],
+ operands[6], operands[7]));
+
+ rtx compare = operands[1];
+ if (operands[3] != const0_rtx)
+ {
+ rtx difference = gen_rtx_MINUS (<MODE>mode, operands[1], operands[3]);
+ compare = gen_reg_rtx (<MODE>mode);
+ emit_insn (gen_rtx_SET (compare, difference));
+ }
+
+ if (word_mode != <MODE>mode)
+ {
+ rtx reg = gen_reg_rtx (word_mode);
+ emit_insn (gen_rtx_SET (reg, gen_rtx_SIGN_EXTEND (word_mode, compare)));
+ compare = reg;
+ }
+
+ emit_insn (gen_rtx_SET (operands[0], gen_rtx_EQ (SImode, compare, const0_rtx)));
+ DONE;
+})
+
+(define_expand "atomic_test_and_set"
+ [(match_operand:QI 0 "register_operand" "") ;; bool output
+ (match_operand:QI 1 "memory_operand" "+A") ;; memory
+ (match_operand:SI 2 "const_int_operand" "")] ;; model
+ "TARGET_ATOMIC"
+{
+ /* We have no QImode atomics, so use the address LSBs to form a mask,
+ then use an aligned SImode atomic. */
+ rtx result = operands[0];
+ rtx mem = operands[1];
+ rtx model = operands[2];
+ rtx addr = force_reg (Pmode, XEXP (mem, 0));
+
+ rtx aligned_addr = gen_reg_rtx (Pmode);
+ emit_move_insn (aligned_addr, gen_rtx_AND (Pmode, addr, GEN_INT (-4)));
+
+ rtx aligned_mem = change_address (mem, SImode, aligned_addr);
+ set_mem_alias_set (aligned_mem, 0);
+
+ rtx offset = gen_reg_rtx (SImode);
+ emit_move_insn (offset, gen_rtx_AND (SImode, gen_lowpart (SImode, addr),
+ GEN_INT (3)));
+
+ rtx tmp = gen_reg_rtx (SImode);
+ emit_move_insn (tmp, GEN_INT (1));
+
+ rtx shmt = gen_reg_rtx (SImode);
+ emit_move_insn (shmt, gen_rtx_ASHIFT (SImode, offset, GEN_INT (3)));
+
+ rtx word = gen_reg_rtx (SImode);
+ emit_move_insn (word, gen_rtx_ASHIFT (SImode, tmp, shmt));
+
+ tmp = gen_reg_rtx (SImode);
+ emit_insn (gen_atomic_fetch_orsi (tmp, aligned_mem, word, model));
+
+ emit_move_insn (gen_lowpart (SImode, result),
+ gen_rtx_LSHIFTRT (SImode, tmp,
+ gen_lowpart (SImode, shmt)));
+ DONE;
+})
diff --git a/gcc/config/riscv/t-elf-multilib b/gcc/config/riscv/t-elf-multilib
new file mode 100644
index 0000000..19f9434
--- /dev/null
+++ b/gcc/config/riscv/t-elf-multilib
@@ -0,0 +1,30 @@
+# This file was generated by multilib-generator with the command:
+# ./multilib-generator rv32i-ilp32--c rv32im-ilp32--c rv32iac-ilp32-- rv32imac-ilp32-- rv32imafc-ilp32f-rv32imafdc- rv64imac-lp64-- rv64imafdc-lp64d--
+MULTILIB_OPTIONS = march=rv32i/march=rv32ic/march=rv32im/march=rv32imc/march=rv32iac/march=rv32imac/march=rv32imafc/march=rv32imafdc/march=rv32gc/march=rv64imac/march=rv64imafdc/march=rv64gc mabi=ilp32/mabi=ilp32f/mabi=lp64/mabi=lp64d
+MULTILIB_DIRNAMES = rv32i \
+rv32ic \
+rv32im \
+rv32imc \
+rv32iac \
+rv32imac \
+rv32imafc \
+rv32imafdc \
+rv32gc \
+rv64imac \
+rv64imafdc \
+rv64gc ilp32 \
+ilp32f \
+lp64 \
+lp64d
+MULTILIB_REQUIRED = march=rv32i/mabi=ilp32 \
+march=rv32im/mabi=ilp32 \
+march=rv32iac/mabi=ilp32 \
+march=rv32imac/mabi=ilp32 \
+march=rv32imafc/mabi=ilp32f \
+march=rv64imac/mabi=lp64 \
+march=rv64imafdc/mabi=lp64d
+MULTILIB_REUSE = march.rv32i/mabi.ilp32=march.rv32ic/mabi.ilp32 \
+march.rv32im/mabi.ilp32=march.rv32imc/mabi.ilp32 \
+march.rv32imafc/mabi.ilp32f=march.rv32imafdc/mabi.ilp32f \
+march.rv32imafc/mabi.ilp32f=march.rv32gc/mabi.ilp32f \
+march.rv64imafdc/mabi.lp64d=march.rv64gc/mabi.lp64d
diff --git a/gcc/config/riscv/t-linux b/gcc/config/riscv/t-linux
new file mode 100644
index 0000000..216d277
--- /dev/null
+++ b/gcc/config/riscv/t-linux
@@ -0,0 +1,3 @@
+# Only XLEN and ABI affect Linux multilib dir names, e.g. /lib32/ilp32d/
+MULTILIB_DIRNAMES := $(patsubst rv32%,lib32,$(patsubst rv64%,lib64,$(MULTILIB_DIRNAMES)))
+MULTILIB_OSDIRNAMES := $(patsubst lib%,../lib%,$(MULTILIB_DIRNAMES))
diff --git a/gcc/config/riscv/t-linux-multilib b/gcc/config/riscv/t-linux-multilib
new file mode 100644
index 0000000..298547f
--- /dev/null
+++ b/gcc/config/riscv/t-linux-multilib
@@ -0,0 +1,46 @@
+# This file was generated by multilib-generator with the command:
+# ./multilib-generator rv32imac-ilp32-rv32ima,rv32imaf,rv32imafd,rv32imafc,rv32imafdc- rv32imafdc-ilp32d-rv32imafd- rv64imac-lp64-rv64ima,rv64imaf,rv64imafd,rv64imafc,rv64imafdc- rv64imafdc-lp64d-rv64imafd-
+MULTILIB_OPTIONS = march=rv32imac/march=rv32ima/march=rv32imaf/march=rv32imafd/march=rv32imafc/march=rv32imafdc/march=rv32g/march=rv32gc/march=rv64imac/march=rv64ima/march=rv64imaf/march=rv64imafd/march=rv64imafc/march=rv64imafdc/march=rv64g/march=rv64gc mabi=ilp32/mabi=ilp32d/mabi=lp64/mabi=lp64d
+MULTILIB_DIRNAMES = rv32imac \
+rv32ima \
+rv32imaf \
+rv32imafd \
+rv32imafc \
+rv32imafdc \
+rv32g \
+rv32gc \
+rv64imac \
+rv64ima \
+rv64imaf \
+rv64imafd \
+rv64imafc \
+rv64imafdc \
+rv64g \
+rv64gc ilp32 \
+ilp32d \
+lp64 \
+lp64d
+MULTILIB_REQUIRED = march=rv32imac/mabi=ilp32 \
+march=rv32imafdc/mabi=ilp32d \
+march=rv64imac/mabi=lp64 \
+march=rv64imafdc/mabi=lp64d
+MULTILIB_REUSE = march.rv32imac/mabi.ilp32=march.rv32ima/mabi.ilp32 \
+march.rv32imac/mabi.ilp32=march.rv32imaf/mabi.ilp32 \
+march.rv32imac/mabi.ilp32=march.rv32imafd/mabi.ilp32 \
+march.rv32imac/mabi.ilp32=march.rv32imafc/mabi.ilp32 \
+march.rv32imac/mabi.ilp32=march.rv32imafdc/mabi.ilp32 \
+march.rv32imac/mabi.ilp32=march.rv32g/mabi.ilp32 \
+march.rv32imac/mabi.ilp32=march.rv32gc/mabi.ilp32 \
+march.rv32imafdc/mabi.ilp32d=march.rv32imafd/mabi.ilp32d \
+march.rv32imafdc/mabi.ilp32d=march.rv32gc/mabi.ilp32d \
+march.rv32imafdc/mabi.ilp32d=march.rv32g/mabi.ilp32d \
+march.rv64imac/mabi.lp64=march.rv64ima/mabi.lp64 \
+march.rv64imac/mabi.lp64=march.rv64imaf/mabi.lp64 \
+march.rv64imac/mabi.lp64=march.rv64imafd/mabi.lp64 \
+march.rv64imac/mabi.lp64=march.rv64imafc/mabi.lp64 \
+march.rv64imac/mabi.lp64=march.rv64imafdc/mabi.lp64 \
+march.rv64imac/mabi.lp64=march.rv64g/mabi.lp64 \
+march.rv64imac/mabi.lp64=march.rv64gc/mabi.lp64 \
+march.rv64imafdc/mabi.lp64d=march.rv64imafd/mabi.lp64d \
+march.rv64imafdc/mabi.lp64d=march.rv64gc/mabi.lp64d \
+march.rv64imafdc/mabi.lp64d=march.rv64g/mabi.lp64d
diff --git a/gcc/config/riscv/t-riscv b/gcc/config/riscv/t-riscv
new file mode 100644
index 0000000..0765b49
--- /dev/null
+++ b/gcc/config/riscv/t-riscv
@@ -0,0 +1,11 @@
+riscv-builtins.o: $(srcdir)/config/riscv/riscv-builtins.c $(CONFIG_H) \
+ $(SYSTEM_H) coretypes.h $(TM_H) $(RTL_H) $(TREE_H) $(RECOG_H) langhooks.h \
+ $(DIAGNOSTIC_CORE_H) $(OPTABS_H) $(srcdir)/config/riscv/riscv-ftypes.def \
+ $(srcdir)/config/riscv/riscv-modes.def
+ $(COMPILER) -c $(ALL_COMPILERFLAGS) $(ALL_CPPFLAGS) $(INCLUDES) \
+ $(srcdir)/config/riscv/riscv-builtins.c
+
+riscv-c.o: $(srcdir)/config/riscv/riscv-c.c $(CONFIG_H) $(SYSTEM_H) \
+ coretypes.h $(TM_H) $(TREE_H) output.h $(C_COMMON_H) $(TARGET_H)
+ $(COMPILER) -c $(ALL_COMPILERFLAGS) $(ALL_CPPFLAGS) $(INCLUDES) \
+ $(srcdir)/config/riscv/riscv-c.c
diff --git a/gcc/configure b/gcc/configure
index 954673c..55ccc3e 100755
--- a/gcc/configure
+++ b/gcc/configure
@@ -24141,6 +24141,17 @@ x3: .space 4
tls_first_minor=14
tls_as_opt="-a32 --fatal-warnings"
;;
+ riscv*-*-*)
+ conftest_s='
+ .section .tdata,"awT",@progbits
+x: .word 2
+ .text
+ la.tls.gd a0,x
+ call __tls_get_addr'
+ tls_first_major=2
+ tls_first_minor=21
+ tls_as_opt='--fatal-warnings'
+ ;;
s390-*-*)
conftest_s='
.section ".tdata","awT",@progbits
@@ -27327,8 +27338,8 @@ esac
# version to the per-target configury.
case "$cpu_type" in
aarch64 | alpha | arm | avr | bfin | cris | i386 | m32c | m68k | microblaze \
- | mips | nios2 | pa | rs6000 | score | sparc | spu | tilegx | tilepro \
- | visium | xstormy16 | xtensa)
+ | mips | nios2 | pa | riscv | rs6000 | score | sparc | spu | tilegx \
+ | tilepro | visium | xstormy16 | xtensa)
insn="nop"
;;
ia64 | s390)
diff --git a/gcc/configure.ac b/gcc/configure.ac
index 4c65d44..0d5625d 100644
--- a/gcc/configure.ac
+++ b/gcc/configure.ac
@@ -3374,6 +3374,17 @@ x3: .space 4
tls_first_minor=14
tls_as_opt="-a32 --fatal-warnings"
;;
+ riscv*-*-*)
+ conftest_s='
+ .section .tdata,"awT",@progbits
+x: .word 2
+ .text
+ la.tls.gd a0,x
+ call __tls_get_addr'
+ tls_first_major=2
+ tls_first_minor=21
+ tls_as_opt='--fatal-warnings'
+ ;;
s390-*-*)
conftest_s='
.section ".tdata","awT",@progbits
@@ -4667,8 +4678,8 @@ esac
# version to the per-target configury.
case "$cpu_type" in
aarch64 | alpha | arm | avr | bfin | cris | i386 | m32c | m68k | microblaze \
- | mips | nios2 | pa | rs6000 | score | sparc | spu | tilegx | tilepro \
- | visium | xstormy16 | xtensa)
+ | mips | nios2 | pa | riscv | rs6000 | score | sparc | spu | tilegx \
+ | tilepro | visium | xstormy16 | xtensa)
insn="nop"
;;
ia64 | s390)
diff --git a/gcc/doc/contrib.texi b/gcc/doc/contrib.texi
index 6d9ca58..c6760f2 100644
--- a/gcc/doc/contrib.texi
+++ b/gcc/doc/contrib.texi
@@ -170,6 +170,10 @@ Denis Chertykov for contributing and maintaining the AVR port, the first GCC por
for an 8-bit architecture.
@item
+Kito Cheng for his work on the RISC-V port, including bringing up the test
+suite and maintenance.
+
+@item
Scott Christley for his Objective-C contributions.
@item
@@ -211,6 +215,9 @@ Paul Dale for his work to add uClinux platform support to the
m68k backend.
@item
+Palmer Dabbelt for his work maintaining the RISC-V port.
+
+@item
Dario Dariol contributed the four varieties of sample programs
that print a copy of their source.
@@ -1023,6 +1030,9 @@ associated configure steps.
Todd Vierling for contributions for NetBSD ports.
@item
+Andrew Waterman for contributing the RISC-V port, as well as maintaining it.
+
+@item
Jonathan Wakely for contributing libstdc++ Doxygen notes and XHTML
guidance.
diff --git a/gcc/doc/install.texi b/gcc/doc/install.texi
index b60b53a..e1a6ef7 100644
--- a/gcc/doc/install.texi
+++ b/gcc/doc/install.texi
@@ -4467,6 +4467,36 @@ This configuration is intended for embedded systems.
@html
<hr />
@end html
+@anchor{riscv32-x-elf}
+@heading riscv32-*-elf
+The RISC-V RV32 instruction set.
+This configuration is intended for embedded systems.
+
+@html
+<hr />
+@end html
+@anchor{riscv64-x-elf}
+@heading riscv64-*-elf
+The RISC-V RV64 instruction set.
+This configuration is intended for embedded systems.
+
+@html
+<hr />
+@end html
+@anchor{riscv32-x-linux}
+@heading riscv32-*-linux
+The RISC-V RV32 instruction set running GNU/Linux.
+
+@html
+<hr />
+@end html
+@anchor{riscv64-x-linux}
+@heading riscv64-*-linux
+The RISC-V RV64 instruction set running GNU/Linux.
+
+@html
+<hr />
+@end html
@anchor{rx-x-elf}
@heading rx-*-elf
The Renesas RX processor. See
diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi
index 2ed9285..0e2f128 100644
--- a/gcc/doc/invoke.texi
+++ b/gcc/doc/invoke.texi
@@ -1006,6 +1006,20 @@ See RS/6000 and PowerPC Options.
-mpower9-fusion -mno-mpower9-fusion -mpower9-vector -mno-power9-vector @gol
-mpower9-dform -mno-power9-dform -mlra -mno-lra}
+@emph{RISC-V Options}
+@gccoptlist{-mbranch-cost=@var{N-instruction} @gol
+-mmemcpy -mno-memcpy @gol
+-mplt -mno-plt @gol
+-mabi=@var{ABI-string} @gol
+-mfdiv -mno-fdiv @gol
+-mdiv -mno-div @gol
+-march=@var{ISA-string} @gol
+-mtune=@var{processor-string} @gol
+-msmall-data-limit=@var{N-bytes} @gol
+-msave-restore -mno-save-restore @gol
+-mcmodel=@var{code-model} @gol
+-mexplicit-relocs -mno-explicit-relocs @gol}
+
@emph{RX Options}
@gccoptlist{-m64bit-doubles -m32bit-doubles -fpu -nofpu@gol
-mcpu=@gol
@@ -12795,6 +12809,7 @@ platform.
* PowerPC Options::
* RL78 Options::
* RS/6000 and PowerPC Options::
+* RISC-V Options::
* RX Options::
* S/390 and zSeries Options::
* Score Options::
@@ -20976,6 +20991,70 @@ GCC.
The @option{-mno-compat-align-parm} option is the default.
@end table
+@node RISC-V Options
+@subsection RISC-V Options
+@cindex RISC-V Options
+
+These command-line options are defined for RISC-V targets:
+
+@table @gcctabopt
+@item -mbranch-cost=@var{n}
+@opindex mbranch-cost
+Set the cost of branches to roughly @var{n} instructions.
+
+@item -mmemcpy
+@itemx -mno-memcpy
+@opindex mmemcpy
+Don't optimize block moves.
+
+@item -mplt
+@itemx -mno-plt
+@opindex plt
+When generating PIC code, allow the use of PLTs. Ignored for non-PIC.
+
+@item -mabi=@var{ABI-string}
+@opindex mabi
+Specify integer and floating-point calling convention. This defaults to the
+natural calling convention: e.g.@ LP64 for RV64I, ILP32 for RV32I, LP64D for
+RV64G.
+
+@item -mfdiv
+@itemx -mno-fdiv
+@opindex mfdiv
+Use hardware floating-point divide and square root instructions. This requires
+the F or D extensions for floating-point registers.
+
+@item -mdiv
+@itemx -mno-div
+@opindex mdiv
+Use hardware instructions for integer division. This requires the M extension.
+
+@item -march=@var{ISA-string}
+@opindex march
+Generate code for given RISC-V ISA (e.g.@ @samp{rv64im}). ISA strings must be
+lower-case. Examples include @samp{rv64i}, @samp{rv32g}, and @samp{rv32imaf}.
+
+@item -mtune=@var{processor-string}
+@opindex mtune
+Optimize the output for the given processor, specified by microarchitecture
+name.
+
+@item -msmall-data-limit=@var{n}
+@opindex msmall-data-limit
+Put global and static data smaller than @var{n} bytes into a special section
+(on some targets).
+
+@item -msave-restore
+@itemx -mno-save-restore
+@opindex msave-restore
+Use smaller but slower prologue and epilogue code.
+
+@item -mcmodel=@var{code-model}
+@opindex mcmodel
+Specify the code model.
+
+@end table
+
@node RX Options
@subsection RX Options
@cindex RX Options
diff --git a/gcc/doc/md.texi b/gcc/doc/md.texi
index 1418248..4a2b6fc 100644
--- a/gcc/doc/md.texi
+++ b/gcc/doc/md.texi
@@ -3436,6 +3436,26 @@ The @code{X} register.
@end table
+@item RISC-V---@file{config/riscv/constraints.md}
+@table @code
+
+@item f
+A floating-point register (if availiable).
+
+@item I
+An I-type 12-bit signed immediate.
+
+@item J
+Integer zero.
+
+@item K
+A 5-bit unsigned immediate for CSR access instructions.
+
+@item A
+An address that is held in a general-purpose register.
+
+@end table
+
@item RX---@file{config/rx/constraints.md}
@table @code
@item Q
diff --git a/gcc/testsuite/g++.dg/cpp0x/constexpr-rom.C b/gcc/testsuite/g++.dg/cpp0x/constexpr-rom.C
index 80a571a..2e0ef68 100644
--- a/gcc/testsuite/g++.dg/cpp0x/constexpr-rom.C
+++ b/gcc/testsuite/g++.dg/cpp0x/constexpr-rom.C
@@ -2,7 +2,7 @@
// { dg-do compile { target c++11 } }
// { dg-additional-options -G0 { target { { alpha*-*-* frv*-*-* ia64-*-* lm32*-*-* m32r*-*-* microblaze*-*-* mips*-*-* nios2-*-* powerpc*-*-* rs6000*-*-* } && { ! { *-*-darwin* *-*-aix* alpha*-*-*vms* } } } } }
// { dg-final { scan-assembler "\\.rdata" { target mips*-*-* } } }
-// { dg-final { scan-assembler "rodata" { target { { *-*-linux-gnu *-*-gnu* *-*-elf } && { ! mips*-*-* } } } } }
+// { dg-final { scan-assembler "rodata" { target { { *-*-linux-gnu *-*-gnu* *-*-elf } && { ! { mips*-*-* riscv*-*-* } } } } } }
struct Data
{
diff --git a/gcc/testsuite/gcc.c-torture/execute/20101011-1.c b/gcc/testsuite/gcc.c-torture/execute/20101011-1.c
index 744763f..899a401 100644
--- a/gcc/testsuite/gcc.c-torture/execute/20101011-1.c
+++ b/gcc/testsuite/gcc.c-torture/execute/20101011-1.c
@@ -6,6 +6,9 @@
#elif defined (__powerpc__) || defined (__PPC__) || defined (__ppc__) || defined (__POWERPC__) || defined (__ppc)
/* On PPC division by zero does not trap. */
# define DO_TEST 0
+#elif defined (__riscv)
+ /* On RISC-V division by zero does not trap. */
+# define DO_TEST 0
#elif defined (__SPU__)
/* On SPU division by zero does not trap. */
# define DO_TEST 0
diff --git a/gcc/testsuite/gcc.dg/20020312-2.c b/gcc/testsuite/gcc.dg/20020312-2.c
index 5fce50d..f5929e0 100644
--- a/gcc/testsuite/gcc.dg/20020312-2.c
+++ b/gcc/testsuite/gcc.dg/20020312-2.c
@@ -67,6 +67,8 @@ extern void abort (void);
# else
# define PIC_REG "30"
# endif
+#elif defined(__riscv)
+/* No pic register. */
#elif defined(__RX__)
/* No pic register. */
#elif defined(__s390__)
diff --git a/gcc/testsuite/gcc.dg/builtin-apply2.c b/gcc/testsuite/gcc.dg/builtin-apply2.c
index b6cbe39..ad61d3b 100644
--- a/gcc/testsuite/gcc.dg/builtin-apply2.c
+++ b/gcc/testsuite/gcc.dg/builtin-apply2.c
@@ -1,6 +1,7 @@
/* { dg-do run } */
/* { dg-require-effective-target untyped_assembly } */
/* { dg-skip-if "Variadic funcs have all args on stack. Normal funcs have args in registers." { "avr-*-* nds32*-*-*" } { "*" } { "" } } */
+/* { dg-skip-if "Variadic funcs use different argument passing from normal funcs." { "riscv*-*-*" } { "*" } { "" } } */
/* { dg-skip-if "Variadic funcs use Base AAPCS. Normal funcs use VFP variant." { arm*-*-* && arm_hf_eabi } { "*" } { "" } } */
/* PR target/12503 */
diff --git a/gcc/testsuite/gcc.dg/ifcvt-4.c b/gcc/testsuite/gcc.dg/ifcvt-4.c
index 319b583..2a86344 100644
--- a/gcc/testsuite/gcc.dg/ifcvt-4.c
+++ b/gcc/testsuite/gcc.dg/ifcvt-4.c
@@ -1,6 +1,6 @@
/* { dg-options "-fdump-rtl-ce1 -O2 --param max-rtl-if-conversion-insns=3" } */
/* { dg-additional-options "-misel" { target { powerpc*-*-* } } } */
-/* { dg-skip-if "Multiple set if-conversion not guaranteed on all subtargets" { "arm*-*-* hppa*64*-*-* visium-*-*" } } */
+/* { dg-skip-if "Multiple set if-conversion not guaranteed on all subtargets" { "arm*-*-* hppa*64*-*-* visium-*-*" riscv*-*-* } } */
typedef int word __attribute__((mode(word)));
diff --git a/gcc/testsuite/gcc.dg/loop-8.c b/gcc/testsuite/gcc.dg/loop-8.c
index 463c5d0..a760072 100644
--- a/gcc/testsuite/gcc.dg/loop-8.c
+++ b/gcc/testsuite/gcc.dg/loop-8.c
@@ -1,6 +1,6 @@
/* { dg-do compile } */
/* { dg-options "-O1 -fdump-rtl-loop2_invariant" } */
-/* { dg-skip-if "unexpected IV" { "hppa*-*-* visium-*-*" } { "*" } { "" } } */
+/* { dg-skip-if "unexpected IV" { "hppa*-*-* visium-*-* riscv*-*-*" } { "*" } { "" } } */
void
f (int *a, int *b)
diff --git a/gcc/testsuite/gcc.dg/sibcall-10.c b/gcc/testsuite/gcc.dg/sibcall-10.c
index d98b43a..d89909a 100644
--- a/gcc/testsuite/gcc.dg/sibcall-10.c
+++ b/gcc/testsuite/gcc.dg/sibcall-10.c
@@ -8,6 +8,8 @@
/* { dg-do run { xfail { { cris-*-* crisv32-*-* h8300-*-* hppa*64*-*-* m32r-*-* mcore-*-* mn10300-*-* msp430*-*-* nds32*-*-* xstormy16-*-* v850*-*-* vax-*-* xtensa*-*-* } || { arm*-*-* && { ! arm32 } } } } } */
/* -mlongcall disables sibcall patterns. */
/* { dg-skip-if "" { powerpc*-*-* } { "-mlongcall" } { "" } } */
+/* -msave-restore disables sibcall patterns. */
+/* { dg-skip-if "" { riscv*-*-* } { "-msave-restore" } { "" } } */
/* { dg-options "-O2 -foptimize-sibling-calls" } */
/* The option -foptimize-sibling-calls is the default, but serves as
diff --git a/gcc/testsuite/gcc.dg/sibcall-9.c b/gcc/testsuite/gcc.dg/sibcall-9.c
index 34e7053..8e30952 100644
--- a/gcc/testsuite/gcc.dg/sibcall-9.c
+++ b/gcc/testsuite/gcc.dg/sibcall-9.c
@@ -8,6 +8,8 @@
/* { dg-do run { xfail { { cris-*-* crisv32-*-* h8300-*-* hppa*64*-*-* m32r-*-* mcore-*-* mn10300-*-* msp430*-*-* nds32*-*-* nvptx-*-* xstormy16-*-* v850*-*-* vax-*-* xtensa*-*-* } || { arm*-*-* && { ! arm32 } } } } } */
/* -mlongcall disables sibcall patterns. */
/* { dg-skip-if "" { powerpc*-*-* } { "-mlongcall" } { "" } } */
+/* -msave-restore disables sibcall patterns. */
+/* { dg-skip-if "" { riscv*-*-* } { "-msave-restore" } { "" } } */
/* { dg-options "-O2 -foptimize-sibling-calls" } */
/* The option -foptimize-sibling-calls is the default, but serves as
diff --git a/gcc/testsuite/gcc.dg/stack-usage-1.c b/gcc/testsuite/gcc.dg/stack-usage-1.c
index 7864c6a..192151d 100644
--- a/gcc/testsuite/gcc.dg/stack-usage-1.c
+++ b/gcc/testsuite/gcc.dg/stack-usage-1.c
@@ -63,6 +63,8 @@
# else
# define SIZE 240
# endif
+#elif defined (__riscv)
+# define SIZE 240
#elif defined (__AVR__)
# define SIZE 254
#elif defined (__s390x__)
diff --git a/gcc/testsuite/gcc.dg/torture/stackalign/builtin-apply-2.c b/gcc/testsuite/gcc.dg/torture/stackalign/builtin-apply-2.c
index ffd865b..eb9d3a9 100644
--- a/gcc/testsuite/gcc.dg/torture/stackalign/builtin-apply-2.c
+++ b/gcc/testsuite/gcc.dg/torture/stackalign/builtin-apply-2.c
@@ -9,7 +9,7 @@
/* arm_hf_eabi: Variadic funcs use Base AAPCS. Normal funcs use VFP variant.
avr: Variadic funcs don't pass arguments in registers, while normal funcs
do. */
-/* { dg-skip-if "Variadic funcs use different argument passing from normal funcs" { arm_hf_eabi || { avr-*-* } } "*" "" } */
+/* { dg-skip-if "Variadic funcs use different argument passing from normal funcs" { arm_hf_eabi || { avr-*-* } || { riscv*-*-* } } "*" "" } */
/* { dg-skip-if "Variadic funcs have all args on stack. Normal funcs have args in registers." { nds32*-*-* } "*" "" } */
/* { dg-require-effective-target untyped_assembly } */
diff --git a/gcc/testsuite/gcc.dg/tree-ssa/20040204-1.c b/gcc/testsuite/gcc.dg/tree-ssa/20040204-1.c
index f7b5dfa..a1237cf 100644
--- a/gcc/testsuite/gcc.dg/tree-ssa/20040204-1.c
+++ b/gcc/testsuite/gcc.dg/tree-ssa/20040204-1.c
@@ -33,4 +33,4 @@ void test55 (int x, int y)
that the && should be emitted (based on BRANCH_COST). Fix this
by teaching dom to look through && and register all components
as true. */
-/* { dg-final { scan-tree-dump-times "link_error" 0 "optimized" { xfail { ! "alpha*-*-* arm*-*-* aarch64*-*-* powerpc*-*-* cris-*-* crisv32-*-* hppa*-*-* i?86-*-* mmix-*-* mips*-*-* m68k*-*-* moxie-*-* nds32*-*-* s390*-*-* sh*-*-* sparc*-*-* spu-*-* visium-*-* x86_64-*-*" } } } } */
+/* { dg-final { scan-tree-dump-times "link_error" 0 "optimized" { xfail { ! "alpha*-*-* arm*-*-* aarch64*-*-* powerpc*-*-* cris-*-* crisv32-*-* hppa*-*-* i?86-*-* mmix-*-* mips*-*-* m68k*-*-* moxie-*-* nds32*-*-* s390*-*-* sh*-*-* sparc*-*-* spu-*-* visium-*-* x86_64-*-* riscv*-*-*" } } } } */
diff --git a/gcc/testsuite/gcc.dg/tree-ssa/ssa-dom-cse-2.c b/gcc/testsuite/gcc.dg/tree-ssa/ssa-dom-cse-2.c
index 1a4bfe6..d2600db 100644
--- a/gcc/testsuite/gcc.dg/tree-ssa/ssa-dom-cse-2.c
+++ b/gcc/testsuite/gcc.dg/tree-ssa/ssa-dom-cse-2.c
@@ -25,4 +25,4 @@ foo ()
but the loop reads only one element at a time, and DOM cannot resolve these.
The same happens on powerpc depending on the SIMD support available. */
-/* { dg-final { scan-tree-dump "return 28;" "optimized" { xfail { { alpha*-*-* hppa*64*-*-* powerpc64*-*-* } || { sparc*-*-* && lp64 } } } } } */
+/* { dg-final { scan-tree-dump "return 28;" "optimized" { xfail { { alpha*-*-* hppa*64*-*-* powerpc64*-*-* } || { { sparc*-*-* && lp64 } || { riscv*-*-* && lp64 } } } } } } */
diff --git a/gcc/testsuite/gcc.dg/tree-ssa/ssa-fre-3.c b/gcc/testsuite/gcc.dg/tree-ssa/ssa-fre-3.c
index a287dad..eda7118 100644
--- a/gcc/testsuite/gcc.dg/tree-ssa/ssa-fre-3.c
+++ b/gcc/testsuite/gcc.dg/tree-ssa/ssa-fre-3.c
@@ -18,4 +18,4 @@ foo (int a, int b)
return aa + bb;
}
-/* { dg-final { scan-tree-dump "Replaced \\\(int\\\) aa_.*with a_" "fre1" } } */
+/* { dg-final { scan-tree-dump "Replaced \\\(int\\\) aa_.*with a_" "fre1" { xfail { riscv*-*-* && lp64 } } } } */
diff --git a/gcc/testsuite/lib/target-supports.exp b/gcc/testsuite/lib/target-supports.exp
index f0f5ac4..f0a56e5 100644
--- a/gcc/testsuite/lib/target-supports.exp
+++ b/gcc/testsuite/lib/target-supports.exp
@@ -6900,6 +6900,7 @@ proc check_effective_target_logical_op_short_circuit {} {
|| [istarget s390*-*-*]
|| [istarget powerpc*-*-*]
|| [istarget nios2*-*-*]
+ || [istarget riscv*-*-*]
|| [istarget visium-*-*]
|| [check_effective_target_arm_cortex_m] } {
return 1
diff --git a/libatomic/ChangeLog b/libatomic/ChangeLog
index 5aa7218..8018b00 100644
--- a/libatomic/ChangeLog
+++ b/libatomic/ChangeLog
@@ -1,3 +1,7 @@
+2017-02-06 Palmer Dabbelt <palmer@dabbelt.com>
+
+ * configure.tgt: Add RISC-V tuple.
+
2016-12-21 Release Manager
* GCC 6.3.0 released.
diff --git a/libatomic/configure.tgt b/libatomic/configure.tgt
index eab2765..1343e37 100644
--- a/libatomic/configure.tgt
+++ b/libatomic/configure.tgt
@@ -37,6 +37,7 @@ case "${target_cpu}" in
ARCH=alpha
;;
rs6000 | powerpc*) ARCH=powerpc ;;
+ riscv*) ARCH=riscv ;;
sh*) ARCH=sh ;;
arm*)
diff --git a/libgcc/ChangeLog b/libgcc/ChangeLog
index 8e5e308..ea559d5 100644
--- a/libgcc/ChangeLog
+++ b/libgcc/ChangeLog
@@ -1,3 +1,21 @@
+2017-02-06 Palmer Dabbelt <palmer@dabbelt.com>
+
+ * config.host: Add RISC-V tuples.
+ * config/riscv/atomic.c: New file.
+ * config/riscv/crti.S: Likewise.
+ * config/riscv/crtn.S: Likewise.
+ * config/riscv/div.S: Likewise.
+ * config/riscv/linux-unwind.h: Likewise.
+ * config/riscv/muldi3.S: Likewise.
+ * config/riscv/multi3.S: Likewise.
+ * config/riscv/save-restore.S: Likewise.
+ * config/riscv/sfp-machine.h: Likewise.
+ * config/riscv/t-elf: Likewise.
+ * config/riscv/t-elf32: Likewise.
+ * config/riscv/t-elf64: Likewise.
+ * config/riscv/t-softfp32: Likewise.
+ * config/riscv/t-softfp64: Likewise.
+
2016-12-21 Release Manager
* GCC 6.3.0 released.
diff --git a/libgcc/config.host b/libgcc/config.host
index 124f2ce..40e3038 100644
--- a/libgcc/config.host
+++ b/libgcc/config.host
@@ -169,6 +169,9 @@ powerpc*-*-*)
;;
rs6000*-*-*)
;;
+riscv*-*-*)
+ cpu_type=riscv
+ ;;
sparc64*-*-*)
cpu_type=sparc
;;
@@ -1095,6 +1098,15 @@ powerpcle-*-eabi*)
tmake_file="${tmake_file} rs6000/t-ppccomm rs6000/t-crtstuff t-crtstuff-pic t-fdpbit"
extra_parts="$extra_parts crtbegin.o crtend.o crtbeginS.o crtendS.o crtbeginT.o ecrti.o ecrtn.o ncrti.o ncrtn.o"
;;
+riscv*-*-linux*)
+ tmake_file="${tmake_file} riscv/t-softfp${host_address} t-softfp riscv/t-elf riscv/t-elf${host_address}"
+ extra_parts="$extra_parts crtbegin.o crtend.o crti.o crtn.o crtendS.o crtbeginT.o"
+ md_unwind_header=riscv/linux-unwind.h
+ ;;
+riscv*-*-*)
+ tmake_file="${tmake_file} riscv/t-softfp${host_address} t-softfp riscv/t-elf riscv/t-elf${host_address}"
+ extra_parts="$extra_parts crtbegin.o crtend.o crti.o crtn.o"
+ ;;
rs6000-ibm-aix4.[3456789]* | powerpc-ibm-aix4.[3456789]*)
md_unwind_header=rs6000/aix-unwind.h
tmake_file="t-fdpbit rs6000/t-ppc64-fp rs6000/t-slibgcc-aix rs6000/t-ibm-ldouble"
diff --git a/libgcc/config/riscv/atomic.c b/libgcc/config/riscv/atomic.c
new file mode 100644
index 0000000..448b0e5
--- /dev/null
+++ b/libgcc/config/riscv/atomic.c
@@ -0,0 +1,111 @@
+/* Legacy sub-word atomics for RISC-V.
+
+ Copyright (C) 2016-2017 Free Software Foundation, Inc.
+
+This file is part of GCC.
+
+GCC is free software; you can redistribute it and/or modify it under
+the terms of the GNU General Public License as published by the Free
+Software Foundation; either version 3, or (at your option) any later
+version.
+
+GCC is distributed in the hope that it will be useful, but WITHOUT ANY
+WARRANTY; without even the implied warranty of MERCHANTABILITY or
+FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+for more details.
+
+Under Section 7 of GPL version 3, you are granted additional
+permissions described in the GCC Runtime Library Exception, version
+3.1, as published by the Free Software Foundation.
+
+You should have received a copy of the GNU General Public License and
+a copy of the GCC Runtime Library Exception along with this program;
+see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
+<http://www.gnu.org/licenses/>. */
+
+#ifdef __riscv_atomic
+
+#include <stdbool.h>
+
+#define INVERT "not %[tmp1], %[tmp1]\n\t"
+#define DONT_INVERT ""
+
+#define GENERATE_FETCH_AND_OP(type, size, opname, insn, invert, cop) \
+ type __sync_fetch_and_ ## opname ## _ ## size (type *p, type v) \
+ { \
+ unsigned long aligned_addr = ((unsigned long) p) & ~3UL; \
+ int shift = (((unsigned long) p) & 3) * 8; \
+ unsigned mask = ((1U << ((sizeof v) * 8)) - 1) << shift; \
+ unsigned old, tmp1, tmp2; \
+ \
+ asm volatile ("1:\n\t" \
+ "lr.w.aq %[old], %[mem]\n\t" \
+ #insn " %[tmp1], %[old], %[value]\n\t" \
+ invert \
+ "and %[tmp1], %[tmp1], %[mask]\n\t" \
+ "and %[tmp2], %[old], %[not_mask]\n\t" \
+ "or %[tmp2], %[tmp2], %[tmp1]\n\t" \
+ "sc.w.rl %[tmp1], %[tmp2], %[mem]\n\t" \
+ "bnez %[tmp1], 1b" \
+ : [old] "=&r" (old), \
+ [mem] "+A" (*(volatile unsigned*) aligned_addr), \
+ [tmp1] "=&r" (tmp1), \
+ [tmp2] "=&r" (tmp2) \
+ : [value] "r" (((unsigned) v) << shift), \
+ [mask] "r" (mask), \
+ [not_mask] "r" (~mask)); \
+ \
+ return (type) (old >> shift); \
+ } \
+ \
+ type __sync_ ## opname ## _and_fetch_ ## size (type *p, type v) \
+ { \
+ type o = __sync_fetch_and_ ## opname ## _ ## size (p, v); \
+ return cop; \
+ }
+
+#define GENERATE_COMPARE_AND_SWAP(type, size) \
+ type __sync_val_compare_and_swap_ ## size (type *p, type o, type n) \
+ { \
+ unsigned long aligned_addr = ((unsigned long) p) & ~3UL; \
+ int shift = (((unsigned long) p) & 3) * 8; \
+ unsigned mask = ((1U << ((sizeof o) * 8)) - 1) << shift; \
+ unsigned old, tmp1; \
+ \
+ asm volatile ("1:\n\t" \
+ "lr.w.aq %[old], %[mem]\n\t" \
+ "and %[tmp1], %[old], %[mask]\n\t" \
+ "bne %[tmp1], %[o], 1f\n\t" \
+ "and %[tmp1], %[old], %[not_mask]\n\t" \
+ "or %[tmp1], %[tmp1], %[n]\n\t" \
+ "sc.w.rl %[tmp1], %[tmp1], %[mem]\n\t" \
+ "bnez %[tmp1], 1b\n\t" \
+ "1:" \
+ : [old] "=&r" (old), \
+ [mem] "+A" (*(volatile unsigned*) aligned_addr), \
+ [tmp1] "=&r" (tmp1) \
+ : [o] "r" ((((unsigned) o) << shift) & mask), \
+ [n] "r" ((((unsigned) n) << shift) & mask), \
+ [mask] "r" (mask), \
+ [not_mask] "r" (~mask)); \
+ \
+ return (type) (old >> shift); \
+ } \
+ bool __sync_bool_compare_and_swap_ ## size (type *p, type o, type n) \
+ { \
+ return __sync_val_compare_and_swap(p, o, n) == o; \
+ }
+
+#define GENERATE_ALL(type, size) \
+ GENERATE_FETCH_AND_OP(type, size, add, add, DONT_INVERT, o + v) \
+ GENERATE_FETCH_AND_OP(type, size, sub, sub, DONT_INVERT, o - v) \
+ GENERATE_FETCH_AND_OP(type, size, and, and, DONT_INVERT, o & v) \
+ GENERATE_FETCH_AND_OP(type, size, xor, xor, DONT_INVERT, o ^ v) \
+ GENERATE_FETCH_AND_OP(type, size, or, or, DONT_INVERT, o | v) \
+ GENERATE_FETCH_AND_OP(type, size, nand, and, INVERT, ~(o & v)) \
+ GENERATE_COMPARE_AND_SWAP(type, size)
+
+GENERATE_ALL(unsigned char, 1)
+GENERATE_ALL(unsigned short, 2)
+
+#endif
diff --git a/libgcc/config/riscv/crti.S b/libgcc/config/riscv/crti.S
new file mode 100644
index 0000000..89bac70
--- /dev/null
+++ b/libgcc/config/riscv/crti.S
@@ -0,0 +1 @@
+/* crti.S is empty because .init_array/.fini_array are used exclusively. */
diff --git a/libgcc/config/riscv/crtn.S b/libgcc/config/riscv/crtn.S
new file mode 100644
index 0000000..ca6ee7b
--- /dev/null
+++ b/libgcc/config/riscv/crtn.S
@@ -0,0 +1 @@
+/* crtn.S is empty because .init_array/.fini_array are used exclusively. */
diff --git a/libgcc/config/riscv/div.S b/libgcc/config/riscv/div.S
new file mode 100644
index 0000000..63d542e
--- /dev/null
+++ b/libgcc/config/riscv/div.S
@@ -0,0 +1,146 @@
+/* Integer division routines for RISC-V.
+
+ Copyright (C) 2016-2017 Free Software Foundation, Inc.
+
+This file is part of GCC.
+
+GCC is free software; you can redistribute it and/or modify it under
+the terms of the GNU General Public License as published by the Free
+Software Foundation; either version 3, or (at your option) any later
+version.
+
+GCC is distributed in the hope that it will be useful, but WITHOUT ANY
+WARRANTY; without even the implied warranty of MERCHANTABILITY or
+FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+for more details.
+
+Under Section 7 of GPL version 3, you are granted additional
+permissions described in the GCC Runtime Library Exception, version
+3.1, as published by the Free Software Foundation.
+
+You should have received a copy of the GNU General Public License and
+a copy of the GCC Runtime Library Exception along with this program;
+see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
+<http://www.gnu.org/licenses/>. */
+
+ .text
+ .align 2
+
+#if __riscv_xlen == 32
+/* Our RV64 64-bit routines are equivalent to our RV32 32-bit routines. */
+# define __udivdi3 __udivsi3
+# define __umoddi3 __umodsi3
+# define __divdi3 __divsi3
+# define __moddi3 __modsi3
+#else
+ .globl __udivsi3
+__udivsi3:
+ /* Compute __udivdi3(a0 << 32, a1 << 32); cast result to uint32_t. */
+ sll a0, a0, 32
+ sll a1, a1, 32
+ move t0, ra
+ jal __udivdi3
+ sext.w a0, a0
+ jr t0
+
+ .globl __umodsi3
+__umodsi3:
+ /* Compute __udivdi3((uint32_t)a0, (uint32_t)a1); cast a1 to uint32_t. */
+ sll a0, a0, 32
+ sll a1, a1, 32
+ srl a0, a0, 32
+ srl a1, a1, 32
+ move t0, ra
+ jal __udivdi3
+ sext.w a0, a1
+ jr t0
+
+ .globl __modsi3
+ __modsi3 = __moddi3
+
+ .globl __divsi3
+__divsi3:
+ /* Check for special case of INT_MIN/-1. Otherwise, fall into __divdi3. */
+ li t0, -1
+ beq a1, t0, .L20
+#endif
+
+ .globl __divdi3
+__divdi3:
+ bltz a0, .L10
+ bltz a1, .L11
+ /* Since the quotient is positive, fall into __udivdi3. */
+
+ .globl __udivdi3
+__udivdi3:
+ mv a2, a1
+ mv a1, a0
+ li a0, -1
+ beqz a2, .L5
+ li a3, 1
+ bgeu a2, a1, .L2
+.L1:
+ blez a2, .L2
+ slli a2, a2, 1
+ slli a3, a3, 1
+ bgtu a1, a2, .L1
+.L2:
+ li a0, 0
+.L3:
+ bltu a1, a2, .L4
+ sub a1, a1, a2
+ or a0, a0, a3
+.L4:
+ srli a3, a3, 1
+ srli a2, a2, 1
+ bnez a3, .L3
+.L5:
+ ret
+
+ .globl __umoddi3
+__umoddi3:
+ /* Call __udivdi3(a0, a1), then return the remainder, which is in a1. */
+ move t0, ra
+ jal __udivdi3
+ move a0, a1
+ jr t0
+
+ /* Handle negative arguments to __divdi3. */
+.L10:
+ neg a0, a0
+ bgez a1, .L12 /* Compute __udivdi3(-a0, a1), then negate the result. */
+ neg a1, a1
+ j __udivdi3 /* Compute __udivdi3(-a0, -a1). */
+.L11: /* Compute __udivdi3(a0, -a1), then negate the result. */
+ neg a1, a1
+.L12:
+ move t0, ra
+ jal __udivdi3
+ neg a0, a0
+ jr t0
+
+ .globl __moddi3
+__moddi3:
+ move t0, ra
+ bltz a1, .L31
+ bltz a0, .L32
+.L30:
+ jal __udivdi3 /* The dividend is not negative. */
+ move a0, a1
+ jr t0
+.L31:
+ neg a1, a1
+ bgez a0, .L30
+.L32:
+ neg a0, a0
+ jal __udivdi3 /* The dividend is hella negative. */
+ neg a0, a1
+ jr t0
+
+#if __riscv_xlen == 64
+ /* continuation of __divsi3 */
+.L20:
+ sll t0, t0, 31
+ bne a0, t0, __divdi3
+ ret
+#endif
diff --git a/libgcc/config/riscv/linux-unwind.h b/libgcc/config/riscv/linux-unwind.h
new file mode 100644
index 0000000..a051a28
--- /dev/null
+++ b/libgcc/config/riscv/linux-unwind.h
@@ -0,0 +1,89 @@
+/* Copyright (C) 2016-2017 Free Software Foundation, Inc.
+
+ This file is free software; you can redistribute it and/or modify it
+ under the terms of the GNU General Public License as published by the
+ Free Software Foundation; either version 3, or (at your option) any
+ later version.
+
+ This file is distributed in the hope that it will be useful, but
+ WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ General Public License for more details.
+
+ Under Section 7 of GPL version 3, you are granted additional
+ permissions described in the GCC Runtime Library Exception, version
+ 3.1, as published by the Free Software Foundation.
+
+ You should have received a copy of the GNU General Public License and
+ a copy of the GCC Runtime Library Exception along with this program;
+ see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
+ <http://www.gnu.org/licenses/>. */
+
+#ifndef inhibit_libc
+
+#include <signal.h>
+#include <stdint.h>
+#include <sys/ucontext.h>
+
+#define LI_A7_8B 0x08b00893
+#define ECALL 0x00000073
+
+#define MD_FALLBACK_FRAME_STATE_FOR riscv_fallback_frame_state
+
+static _Unwind_Reason_Code
+riscv_fallback_frame_state (struct _Unwind_Context *context,
+ _Unwind_FrameState * fs)
+{
+ /* The kernel creates an rt_sigframe on the stack immediately prior
+ to delivering a signal.
+
+ This structure must have the same shape as the linux kernel
+ equivalent. */
+ struct rt_sigframe
+ {
+ siginfo_t info;
+ struct ucontext uc;
+ };
+
+ struct rt_sigframe *rt_;
+ _Unwind_Ptr new_cfa;
+ uint16_t *pc = context->ra;
+ struct sigcontext *sc;
+ int i;
+
+ /* A signal frame will have a return address pointing to
+ __default_sa_restorer. This code is hardwired as:
+
+ 0x08b00893 li a7,0x8b
+ 0x00000073 ecall
+
+ Note, the PC might only have 2-byte alignment.
+ */
+ if (pc[0] != (uint16_t)LI_A7_8B || pc[1] != (uint16_t)(LI_A7_8B >> 16)
+ || pc[2] != (uint16_t)ECALL || pc[3] != (uint16_t)(ECALL >> 16))
+ return _URC_END_OF_STACK;
+
+ rt_ = context->cfa;
+ sc = &rt_->uc.uc_mcontext;
+
+ new_cfa = (_Unwind_Ptr) sc;
+ fs->regs.cfa_how = CFA_REG_OFFSET;
+ fs->regs.cfa_reg = __LIBGCC_STACK_POINTER_REGNUM__;
+ fs->regs.cfa_offset = new_cfa - (_Unwind_Ptr) context->cfa;
+
+ for (i = 0; i < 32; i++)
+ {
+ fs->regs.reg[i].how = REG_SAVED_OFFSET;
+ fs->regs.reg[i].loc.offset = (_Unwind_Ptr) &sc->gregs[i] - new_cfa;
+ }
+
+ fs->signal_frame = 1;
+ fs->retaddr_column = __LIBGCC_DWARF_ALT_FRAME_RETURN_COLUMN__;
+ fs->regs.reg[fs->retaddr_column].how = REG_SAVED_VAL_OFFSET;
+ fs->regs.reg[fs->retaddr_column].loc.offset =
+ (_Unwind_Ptr) sc->gregs[0] - new_cfa;
+
+ return _URC_NO_REASON;
+}
+
+#endif
diff --git a/libgcc/config/riscv/muldi3.S b/libgcc/config/riscv/muldi3.S
new file mode 100644
index 0000000..eb3d9b0
--- /dev/null
+++ b/libgcc/config/riscv/muldi3.S
@@ -0,0 +1,46 @@
+/* Integer multiplication routines for RISC-V.
+
+ Copyright (C) 2016-2017 Free Software Foundation, Inc.
+
+This file is part of GCC.
+
+GCC is free software; you can redistribute it and/or modify it under
+the terms of the GNU General Public License as published by the Free
+Software Foundation; either version 3, or (at your option) any later
+version.
+
+GCC is distributed in the hope that it will be useful, but WITHOUT ANY
+WARRANTY; without even the implied warranty of MERCHANTABILITY or
+FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+for more details.
+
+Under Section 7 of GPL version 3, you are granted additional
+permissions described in the GCC Runtime Library Exception, version
+3.1, as published by the Free Software Foundation.
+
+You should have received a copy of the GNU General Public License and
+a copy of the GCC Runtime Library Exception along with this program;
+see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
+<http://www.gnu.org/licenses/>. */
+
+ .text
+ .align 2
+
+#if __riscv_xlen == 32
+/* Our RV64 64-bit routine is equivalent to our RV32 32-bit routine. */
+# define __muldi3 __mulsi3
+#endif
+
+ .globl __muldi3
+__muldi3:
+ mv a2, a0
+ li a0, 0
+.L1:
+ andi a3, a1, 1
+ beqz a3, .L2
+ add a0, a0, a2
+.L2:
+ srli a1, a1, 1
+ slli a2, a2, 1
+ bnez a1, .L1
+ ret
diff --git a/libgcc/config/riscv/multi3.S b/libgcc/config/riscv/multi3.S
new file mode 100644
index 0000000..4d454e6
--- /dev/null
+++ b/libgcc/config/riscv/multi3.S
@@ -0,0 +1,81 @@
+/* Integer multiplication routines for RISC-V.
+
+ Copyright (C) 2016-2017 Free Software Foundation, Inc.
+
+This file is part of GCC.
+
+GCC is free software; you can redistribute it and/or modify it under
+the terms of the GNU General Public License as published by the Free
+Software Foundation; either version 3, or (at your option) any later
+version.
+
+GCC is distributed in the hope that it will be useful, but WITHOUT ANY
+WARRANTY; without even the implied warranty of MERCHANTABILITY or
+FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+for more details.
+
+Under Section 7 of GPL version 3, you are granted additional
+permissions described in the GCC Runtime Library Exception, version
+3.1, as published by the Free Software Foundation.
+
+You should have received a copy of the GNU General Public License and
+a copy of the GCC Runtime Library Exception along with this program;
+see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
+<http://www.gnu.org/licenses/>. */
+
+ .text
+ .align 2
+
+#if __riscv_xlen == 32
+/* Our RV64 64-bit routines are equivalent to our RV32 32-bit routines. */
+# define __multi3 __muldi3
+#endif
+
+ .globl __multi3
+__multi3:
+
+#if __riscv_xlen == 32
+/* Our RV64 64-bit routines are equivalent to our RV32 32-bit routines. */
+# define __muldi3 __mulsi3
+#endif
+
+/* We rely on the fact that __muldi3 doesn't clobber the t-registers. */
+
+ mv t0, ra
+ mv t5, a0
+ mv a0, a1
+ mv t6, a3
+ mv a1, t5
+ mv a4, a2
+ li a5, 0
+ li t2, 0
+ li t4, 0
+.L1:
+ add a6, t2, a1
+ andi t3, a4, 1
+ slli a7, a5, 1
+ slti t1, a1, 0
+ srli a4, a4, 1
+ add a5, t4, a5
+ beqz t3, .L2
+ sltu t3, a6, t2
+ mv t2, a6
+ add t4, t3, a5
+.L2:
+ slli a1, a1, 1
+ or a5, t1, a7
+ bnez a4, .L1
+ beqz a0, .L3
+ mv a1, a2
+ call __muldi3
+ add t4, t4, a0
+.L3:
+ beqz t6, .L4
+ mv a1, t6
+ mv a0, t5
+ call __muldi3
+ add t4, t4, a0
+.L4:
+ mv a0, t2
+ mv a1, t4
+ jr t0
diff --git a/libgcc/config/riscv/save-restore.S b/libgcc/config/riscv/save-restore.S
new file mode 100644
index 0000000..2073a73
--- /dev/null
+++ b/libgcc/config/riscv/save-restore.S
@@ -0,0 +1,463 @@
+/* Callee-saved register spill and fill routines for RISC-V.
+
+ Copyright (C) 2016-2017 Free Software Foundation, Inc.
+
+This file is part of GCC.
+
+GCC is free software; you can redistribute it and/or modify it under
+the terms of the GNU General Public License as published by the Free
+Software Foundation; either version 3, or (at your option) any later
+version.
+
+GCC is distributed in the hope that it will be useful, but WITHOUT ANY
+WARRANTY; without even the implied warranty of MERCHANTABILITY or
+FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+for more details.
+
+Under Section 7 of GPL version 3, you are granted additional
+permissions described in the GCC Runtime Library Exception, version
+3.1, as published by the Free Software Foundation.
+
+You should have received a copy of the GNU General Public License and
+a copy of the GCC Runtime Library Exception along with this program;
+see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
+<http://www.gnu.org/licenses/>. */
+
+ .text
+
+ .globl __riscv_save_12
+ .globl __riscv_save_11
+ .globl __riscv_save_10
+ .globl __riscv_save_9
+ .globl __riscv_save_8
+ .globl __riscv_save_7
+ .globl __riscv_save_6
+ .globl __riscv_save_5
+ .globl __riscv_save_4
+ .globl __riscv_save_3
+ .globl __riscv_save_2
+ .globl __riscv_save_1
+ .globl __riscv_save_0
+
+ .globl __riscv_restore_12
+ .globl __riscv_restore_11
+ .globl __riscv_restore_10
+ .globl __riscv_restore_9
+ .globl __riscv_restore_8
+ .globl __riscv_restore_7
+ .globl __riscv_restore_6
+ .globl __riscv_restore_5
+ .globl __riscv_restore_4
+ .globl __riscv_restore_3
+ .globl __riscv_restore_2
+ .globl __riscv_restore_1
+ .globl __riscv_restore_0
+
+#if __riscv_xlen == 64
+
+__riscv_save_12:
+ .cfi_startproc
+ # __riscv_save_* routine use t0/x5 as return address
+ .cfi_return_column 5
+ addi sp, sp, -112
+ .cfi_def_cfa_offset 112
+ li t1, 0
+ sd s11, 8(sp)
+ .cfi_offset 27, -104
+ j .Ls10
+
+__riscv_save_11:
+__riscv_save_10:
+ .cfi_restore 27
+ addi sp, sp, -112
+ .cfi_def_cfa_offset 112
+ li t1, -16
+.Ls10:
+ sd s10, 16(sp)
+ .cfi_offset 26, -96
+ sd s9, 24(sp)
+ .cfi_offset 25, -88
+ j .Ls8
+
+__riscv_save_9:
+__riscv_save_8:
+ .cfi_restore 25
+ .cfi_restore 26
+ .cfi_restore 27
+ addi sp, sp, -112
+ .cfi_def_cfa_offset 112
+ li t1, -32
+.Ls8:
+ sd s8, 32(sp)
+ .cfi_offset 24, -80
+ sd s7, 40(sp)
+ .cfi_offset 23, -72
+ j .Ls6
+
+__riscv_save_7:
+__riscv_save_6:
+ .cfi_restore 23
+ .cfi_restore 24
+ .cfi_restore 25
+ .cfi_restore 26
+ .cfi_restore 27
+ addi sp, sp, -112
+ .cfi_def_cfa_offset 112
+ li t1, -48
+.Ls6:
+ sd s6, 48(sp)
+ .cfi_offset 22, -64
+ sd s5, 56(sp)
+ .cfi_offset 21, -56
+ j .Ls4
+
+__riscv_save_5:
+__riscv_save_4:
+ .cfi_restore 21
+ .cfi_restore 22
+ .cfi_restore 24
+ .cfi_restore 25
+ .cfi_restore 26
+ .cfi_restore 27
+ .cfi_restore 24
+ .cfi_restore 25
+ .cfi_restore 26
+ .cfi_restore 27
+ addi sp, sp, -112
+ .cfi_def_cfa_offset 112
+ li t1, -64
+.Ls4:
+ sd s4, 64(sp)
+ .cfi_offset 20, -48
+ sd s3, 72(sp)
+ .cfi_offset 19, -40
+ j .Ls2
+
+__riscv_save_3:
+__riscv_save_2:
+ .cfi_restore 19
+ .cfi_restore 20
+ .cfi_restore 21
+ .cfi_restore 22
+ .cfi_restore 24
+ .cfi_restore 25
+ .cfi_restore 26
+ .cfi_restore 27
+ .cfi_restore 24
+ .cfi_restore 25
+ .cfi_restore 26
+ .cfi_restore 27
+ addi sp, sp, -112
+ .cfi_def_cfa_offset 112
+ li t1, -80
+.Ls2:
+ sd s2, 80(sp)
+ .cfi_offset 18, -32
+ sd s1, 88(sp)
+ .cfi_offset 9, -24
+ sd s0, 96(sp)
+ .cfi_offset 8, -16
+ sd ra, 104(sp)
+ .cfi_offset 1, -8
+ # CFA info is not correct in next 2 instruction since t1's
+ # value is depend on how may register really save.
+ sub sp, sp, t1
+ jr t0
+ .cfi_endproc
+
+__riscv_save_1:
+__riscv_save_0:
+ .cfi_startproc
+ # __riscv_save_* routine use t0/x5 as return address
+ .cfi_return_column 5
+ addi sp, sp, -16
+ .cfi_def_cfa_offset 16
+ sd s0, 0(sp)
+ .cfi_offset 8, -16
+ sd ra, 8(sp)
+ .cfi_offset 1, -8
+ jr t0
+ .cfi_endproc
+
+__riscv_restore_12:
+ .cfi_startproc
+ .cfi_def_cfa_offset 112
+ .cfi_offset 27, -104
+ .cfi_offset 26, -96
+ .cfi_offset 25, -88
+ .cfi_offset 24, -80
+ .cfi_offset 23, -72
+ .cfi_offset 22, -64
+ .cfi_offset 21, -56
+ .cfi_offset 20, -48
+ .cfi_offset 19, -40
+ .cfi_offset 18, -32
+ .cfi_offset 9, -24
+ .cfi_offset 8, -16
+ .cfi_offset 1, -8
+ ld s11, 8(sp)
+ .cfi_restore 27
+ addi sp, sp, 16
+
+__riscv_restore_11:
+__riscv_restore_10:
+ .cfi_restore 27
+ .cfi_def_cfa_offset 96
+ ld s10, 0(sp)
+ .cfi_restore 26
+ ld s9, 8(sp)
+ .cfi_restore 25
+ addi sp, sp, 16
+
+__riscv_restore_9:
+__riscv_restore_8:
+ .cfi_restore 25
+ .cfi_restore 26
+ .cfi_restore 27
+ .cfi_def_cfa_offset 80
+ ld s8, 0(sp)
+ .cfi_restore 24
+ ld s7, 8(sp)
+ .cfi_restore 23
+ addi sp, sp, 16
+
+__riscv_restore_7:
+__riscv_restore_6:
+ .cfi_restore 23
+ .cfi_restore 24
+ .cfi_restore 25
+ .cfi_restore 26
+ .cfi_restore 27
+ .cfi_def_cfa_offset 64
+ ld s6, 0(sp)
+ .cfi_restore 22
+ ld s5, 8(sp)
+ .cfi_restore 21
+ addi sp, sp, 16
+
+__riscv_restore_5:
+__riscv_restore_4:
+ .cfi_restore 21
+ .cfi_restore 22
+ .cfi_restore 23
+ .cfi_restore 24
+ .cfi_restore 25
+ .cfi_restore 26
+ .cfi_restore 27
+ .cfi_def_cfa_offset 48
+ ld s4, 0(sp)
+ .cfi_restore 20
+ ld s3, 8(sp)
+ .cfi_restore 19
+ addi sp, sp, 16
+
+__riscv_restore_3:
+__riscv_restore_2:
+ .cfi_restore 19
+ .cfi_restore 20
+ .cfi_restore 21
+ .cfi_restore 22
+ .cfi_restore 23
+ .cfi_restore 24
+ .cfi_restore 25
+ .cfi_restore 26
+ .cfi_restore 27
+ .cfi_def_cfa_offset 32
+ ld s2, 0(sp)
+ .cfi_restore 18
+ ld s1, 8(sp)
+ .cfi_restore 9
+ addi sp, sp, 16
+
+__riscv_restore_1:
+__riscv_restore_0:
+ .cfi_restore 9
+ .cfi_restore 18
+ .cfi_restore 19
+ .cfi_restore 20
+ .cfi_restore 21
+ .cfi_restore 22
+ .cfi_restore 23
+ .cfi_restore 24
+ .cfi_restore 25
+ .cfi_restore 26
+ .cfi_restore 27
+ .cfi_def_cfa_offset 16
+ ld s0, 0(sp)
+ .cfi_restore 8
+ ld ra, 8(sp)
+ .cfi_restore 1
+ addi sp, sp, 16
+ .cfi_def_cfa_offset 0
+ ret
+ .cfi_endproc
+
+#else
+
+__riscv_save_12:
+ .cfi_startproc
+ # __riscv_save_* routine use t0/x5 as return address
+ .cfi_return_column 5
+ addi sp, sp, -64
+ .cfi_def_cfa_offset 64
+ li t1, 0
+ sw s11, 12(sp)
+ .cfi_offset 27, -52
+ j .Ls10
+
+__riscv_save_11:
+__riscv_save_10:
+__riscv_save_9:
+__riscv_save_8:
+ .cfi_restore 27
+ addi sp, sp, -64
+ .cfi_def_cfa_offset 64
+ li t1, -16
+.Ls10:
+ sw s10, 16(sp)
+ .cfi_offset 26, -48
+ sw s9, 20(sp)
+ .cfi_offset 25, -44
+ sw s8, 24(sp)
+ .cfi_offset 24, -40
+ sw s7, 28(sp)
+ .cfi_offset 23, -36
+ j .Ls6
+
+__riscv_save_7:
+__riscv_save_6:
+__riscv_save_5:
+__riscv_save_4:
+ .cfi_restore 23
+ .cfi_restore 24
+ .cfi_restore 25
+ .cfi_restore 26
+ .cfi_restore 27
+ addi sp, sp, -64
+ .cfi_def_cfa_offset 64
+ li t1, -32
+.Ls6:
+ sw s6, 32(sp)
+ .cfi_offset 22, -32
+ sw s5, 36(sp)
+ .cfi_offset 21, -28
+ sw s4, 40(sp)
+ .cfi_offset 20, -24
+ sw s3, 44(sp)
+ .cfi_offset 19, -20
+ sw s2, 48(sp)
+ .cfi_offset 18, -16
+ sw s1, 52(sp)
+ .cfi_offset 9, -12
+ sw s0, 56(sp)
+ .cfi_offset 8, -8
+ sw ra, 60(sp)
+ .cfi_offset 1, -4
+ # CFA info is not correct in next 2 instruction since t1's
+ # value is depend on how may register really save.
+ sub sp, sp, t1
+ jr t0
+ .cfi_endproc
+
+__riscv_save_3:
+__riscv_save_2:
+__riscv_save_1:
+__riscv_save_0:
+ .cfi_startproc
+ # __riscv_save_* routine use t0/x5 as return address
+ .cfi_return_column 5
+ addi sp, sp, -16
+ .cfi_def_cfa_offset 16
+ sw s2, 0(sp)
+ sw s1, 4(sp)
+ .cfi_offset 9, -16
+ sw s0, 8(sp)
+ .cfi_offset 8, -8
+ sw ra, 12(sp)
+ .cfi_offset 1, -4
+ jr t0
+ .cfi_endproc
+
+__riscv_restore_12:
+ .cfi_startproc
+ .cfi_def_cfa_offset 64
+ .cfi_offset 27, -52
+ .cfi_offset 26, -48
+ .cfi_offset 25, -44
+ .cfi_offset 24, -40
+ .cfi_offset 23, -36
+ .cfi_offset 22, -32
+ .cfi_offset 21, -28
+ .cfi_offset 20, -24
+ .cfi_offset 19, -20
+ .cfi_offset 18, -16
+ .cfi_offset 9, -12
+ .cfi_offset 8, -8
+ .cfi_offset 1, -4
+ lw s11, 12(sp)
+ .cfi_restore 27
+ addi sp, sp, 16
+
+__riscv_restore_11:
+__riscv_restore_10:
+__riscv_restore_9:
+__riscv_restore_8:
+ .cfi_restore 27
+ .cfi_def_cfa_offset 48
+ lw s10, 0(sp)
+ .cfi_restore 26
+ lw s9, 4(sp)
+ .cfi_restore 25
+ lw s8, 8(sp)
+ .cfi_restore 24
+ lw s7, 12(sp)
+ .cfi_restore 23
+ addi sp, sp, 16
+
+__riscv_restore_7:
+__riscv_restore_6:
+__riscv_restore_5:
+__riscv_restore_4:
+ .cfi_restore 23
+ .cfi_restore 24
+ .cfi_restore 25
+ .cfi_restore 26
+ .cfi_restore 27
+ .cfi_def_cfa_offset 32
+ lw s6, 0(sp)
+ .cfi_restore 22
+ lw s5, 4(sp)
+ .cfi_restore 21
+ lw s4, 8(sp)
+ .cfi_restore 20
+ lw s3, 12(sp)
+ .cfi_restore 19
+ addi sp, sp, 16
+
+__riscv_restore_3:
+__riscv_restore_2:
+__riscv_restore_1:
+__riscv_restore_0:
+ .cfi_restore 19
+ .cfi_restore 20
+ .cfi_restore 21
+ .cfi_restore 22
+ .cfi_restore 24
+ .cfi_restore 25
+ .cfi_restore 26
+ .cfi_restore 27
+ .cfi_def_cfa_offset 16
+ lw s2, 0(sp)
+ .cfi_restore 18
+ lw s1, 4(sp)
+ .cfi_restore 9
+ lw s0, 8(sp)
+ .cfi_restore 8
+ lw ra, 12(sp)
+ .cfi_restore 1
+ addi sp, sp, 16
+ .cfi_def_cfa_offset 0
+ ret
+ .cfi_endproc
+
+#endif
diff --git a/libgcc/config/riscv/sfp-machine.h b/libgcc/config/riscv/sfp-machine.h
new file mode 100644
index 0000000..b1a27e7
--- /dev/null
+++ b/libgcc/config/riscv/sfp-machine.h
@@ -0,0 +1,137 @@
+/* Software floating-point machine description for RISC-V.
+
+ Copyright (C) 2016-2017 Free Software Foundation, Inc.
+
+This file is part of GCC.
+
+GCC is free software; you can redistribute it and/or modify it under
+the terms of the GNU General Public License as published by the Free
+Software Foundation; either version 3, or (at your option) any later
+version.
+
+GCC is distributed in the hope that it will be useful, but WITHOUT ANY
+WARRANTY; without even the implied warranty of MERCHANTABILITY or
+FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+for more details.
+
+Under Section 7 of GPL version 3, you are granted additional
+permissions described in the GCC Runtime Library Exception, version
+3.1, as published by the Free Software Foundation.
+
+You should have received a copy of the GNU General Public License and
+a copy of the GCC Runtime Library Exception along with this program;
+see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
+<http://www.gnu.org/licenses/>. */
+
+#if __riscv_xlen == 32
+
+#define _FP_W_TYPE_SIZE 32
+#define _FP_W_TYPE unsigned long
+#define _FP_WS_TYPE signed long
+#define _FP_I_TYPE long
+
+#define _FP_MUL_MEAT_S(R,X,Y) \
+ _FP_MUL_MEAT_1_wide(_FP_WFRACBITS_S,R,X,Y,umul_ppmm)
+#define _FP_MUL_MEAT_D(R,X,Y) \
+ _FP_MUL_MEAT_2_wide(_FP_WFRACBITS_D,R,X,Y,umul_ppmm)
+#define _FP_MUL_MEAT_Q(R,X,Y) \
+ _FP_MUL_MEAT_4_wide(_FP_WFRACBITS_Q,R,X,Y,umul_ppmm)
+
+#define _FP_DIV_MEAT_S(R,X,Y) _FP_DIV_MEAT_1_udiv_norm(S,R,X,Y)
+#define _FP_DIV_MEAT_D(R,X,Y) _FP_DIV_MEAT_2_udiv(D,R,X,Y)
+#define _FP_DIV_MEAT_Q(R,X,Y) _FP_DIV_MEAT_4_udiv(Q,R,X,Y)
+
+#define _FP_NANFRAC_S _FP_QNANBIT_S
+#define _FP_NANFRAC_D _FP_QNANBIT_D, 0
+#define _FP_NANFRAC_Q _FP_QNANBIT_Q, 0, 0, 0
+
+#else
+
+#define _FP_W_TYPE_SIZE 64
+#define _FP_W_TYPE unsigned long long
+#define _FP_WS_TYPE signed long long
+#define _FP_I_TYPE long long
+
+#define _FP_MUL_MEAT_S(R,X,Y) \
+ _FP_MUL_MEAT_1_imm(_FP_WFRACBITS_S,R,X,Y)
+#define _FP_MUL_MEAT_D(R,X,Y) \
+ _FP_MUL_MEAT_1_wide(_FP_WFRACBITS_D,R,X,Y,umul_ppmm)
+#define _FP_MUL_MEAT_Q(R,X,Y) \
+ _FP_MUL_MEAT_2_wide_3mul(_FP_WFRACBITS_Q,R,X,Y,umul_ppmm)
+
+#define _FP_DIV_MEAT_S(R,X,Y) _FP_DIV_MEAT_1_imm(S,R,X,Y,_FP_DIV_HELP_imm)
+#define _FP_DIV_MEAT_D(R,X,Y) _FP_DIV_MEAT_1_udiv_norm(D,R,X,Y)
+#define _FP_DIV_MEAT_Q(R,X,Y) _FP_DIV_MEAT_2_udiv(Q,R,X,Y)
+
+#define _FP_NANFRAC_S _FP_QNANBIT_S
+#define _FP_NANFRAC_D _FP_QNANBIT_D
+#define _FP_NANFRAC_Q _FP_QNANBIT_Q, 0
+
+#endif
+
+#if __riscv_xlen == 64
+typedef int TItype __attribute__ ((mode (TI)));
+typedef unsigned int UTItype __attribute__ ((mode (TI)));
+#define TI_BITS (__CHAR_BIT__ * (int)sizeof(TItype))
+#endif
+
+/* The type of the result of a floating point comparison. This must
+ match __libgcc_cmp_return__ in GCC for the target. */
+typedef int __gcc_CMPtype __attribute__ ((mode (__libgcc_cmp_return__)));
+#define CMPtype __gcc_CMPtype
+
+#define _FP_NANSIGN_S 0
+#define _FP_NANSIGN_D 0
+#define _FP_NANSIGN_Q 0
+
+#define _FP_KEEPNANFRACP 0
+#define _FP_QNANNEGATEDP 0
+
+#define _FP_CHOOSENAN(fs, wc, R, X, Y, OP) \
+ do { \
+ R##_s = _FP_NANSIGN_##fs; \
+ _FP_FRAC_SET_##wc(R,_FP_NANFRAC_##fs); \
+ R##_c = FP_CLS_NAN; \
+ } while (0)
+
+#define _FP_DECL_EX int _frm __attribute__ ((unused));
+#define FP_ROUNDMODE _frm
+
+#define FP_RND_NEAREST 0x0
+#define FP_RND_ZERO 0x1
+#define FP_RND_PINF 0x3
+#define FP_RND_MINF 0x2
+
+#define FP_EX_INVALID 0x10
+#define FP_EX_OVERFLOW 0x04
+#define FP_EX_UNDERFLOW 0x02
+#define FP_EX_DIVZERO 0x08
+#define FP_EX_INEXACT 0x01
+
+#define _FP_TININESS_AFTER_ROUNDING 1
+
+#ifdef __riscv_flen
+#define FP_INIT_ROUNDMODE \
+do { \
+ __asm__ volatile ("frrm %0" : "=r" (_frm)); \
+} while (0)
+
+#define FP_HANDLE_EXCEPTIONS \
+do { \
+ if (__builtin_expect (_fex, 0)) \
+ __asm__ volatile ("csrs fflags, %0" : : "rK" (_fex)); \
+} while (0)
+#else
+#define FP_INIT_ROUNDMODE _frm = FP_RND_NEAREST
+#endif
+
+#define __LITTLE_ENDIAN 1234
+#define __BIG_ENDIAN 4321
+
+#define __BYTE_ORDER __LITTLE_ENDIAN
+
+
+/* Define ALIASNAME as a strong alias for NAME. */
+# define strong_alias(name, aliasname) _strong_alias(name, aliasname)
+# define _strong_alias(name, aliasname) \
+ extern __typeof (name) aliasname __attribute__ ((alias (#name)));
diff --git a/libgcc/config/riscv/t-elf b/libgcc/config/riscv/t-elf
new file mode 100644
index 0000000..01d5eba
--- /dev/null
+++ b/libgcc/config/riscv/t-elf
@@ -0,0 +1,6 @@
+LIB2ADD += $(srcdir)/config/riscv/save-restore.S \
+ $(srcdir)/config/riscv/muldi3.S \
+ $(srcdir)/config/riscv/multi3.S \
+ $(srcdir)/config/riscv/div.S \
+ $(srcdir)/config/riscv/atomic.c \
+
diff --git a/libgcc/config/riscv/t-elf32 b/libgcc/config/riscv/t-elf32
new file mode 100644
index 0000000..f375123
--- /dev/null
+++ b/libgcc/config/riscv/t-elf32
@@ -0,0 +1 @@
+LIB2FUNCS_EXCLUDE += _divsi3 _modsi3 _udivsi3 _umodsi3 _mulsi3 _muldi3
diff --git a/libgcc/config/riscv/t-elf64 b/libgcc/config/riscv/t-elf64
new file mode 100644
index 0000000..f375123
--- /dev/null
+++ b/libgcc/config/riscv/t-elf64
@@ -0,0 +1 @@
+LIB2FUNCS_EXCLUDE += _divsi3 _modsi3 _udivsi3 _umodsi3 _mulsi3 _muldi3
diff --git a/libgcc/config/riscv/t-softfp32 b/libgcc/config/riscv/t-softfp32
new file mode 100644
index 0000000..1bd51e8
--- /dev/null
+++ b/libgcc/config/riscv/t-softfp32
@@ -0,0 +1,26 @@
+ABI_SINGLE:=$(findstring __riscv_float_abi_single,$(shell $(gcc_compile_bare) -dM -E - </dev/null))
+ABI_DOUBLE:=$(findstring __riscv_float_abi_double,$(shell $(gcc_compile_bare) -dM -E - </dev/null))
+ABI_QUAD:=$(findstring __riscv_float_abi_quad,$(shell $(gcc_compile_bare) -dM -E - </dev/null))
+
+softfp_int_modes := si di
+softfp_exclude_libgcc2 := n
+
+ifndef ABI_QUAD
+ifdef ABI_DOUBLE
+
+softfp_float_modes := tf
+softfp_extensions := sftf dftf
+softfp_truncations := tfsf tfdf
+
+else
+
+softfp_float_modes := df tf
+softfp_extensions := sfdf sftf dftf
+softfp_truncations := dfsf tfsf tfdf
+
+ifndef ABI_SINGLE
+softfp_float_modes += sf
+endif
+
+endif
+endif
diff --git a/libgcc/config/riscv/t-softfp64 b/libgcc/config/riscv/t-softfp64
new file mode 100644
index 0000000..7587095
--- /dev/null
+++ b/libgcc/config/riscv/t-softfp64
@@ -0,0 +1,3 @@
+include $(srcdir)/config/riscv/t-softfp32
+
+softfp_int_modes += ti
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