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os: increase throughput of blit for ARM 64-bit 

Fix #3615
This commit is contained in:
Stefan Kalkowski 2020-01-23 13:58:20 +01:00 committed by Christian Helmuth
parent f49f91da08
commit fda337a1c0
2 changed files with 99 additions and 0 deletions
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5
repos/os/lib/mk/spec/arm_64/blit.mk Normal file
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SRC_CC = blit.cc
REQUIRES = arm_64
INC_DIR += $(REP_DIR)/src/lib/blit/spec/arm_64
vpath blit.cc $(REP_DIR)/src/lib/blit

94
repos/os/src/lib/blit/spec/arm_64/blit_helper.h Normal file
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/*
* \brief Blitting utilities for ARM 64-Bit
* \author Stefan Kalkowski
* \date 2020-01-22
*/
/*
* Copyright (C) 2020 Genode Labs GmbH
*
* This file is part of the Genode OS framework, which is distributed
* under the terms of the GNU Affero General Public License version 3.
*/
#ifndef _LIB__BLIT__SPEC__ARM_64__BLIT_HELPER_H_
#define _LIB__BLIT__SPEC__ARM_64__BLIT_HELPER_H_
#include <base/stdint.h>
#include <blit/blit.h>
/**
* Copy single 16bit column
*/
static inline void copy_16bit_column(char const *src, int src_w,
char *dst, int dst_w, int h)
{
for (; h-- > 0; src += src_w, dst += dst_w)
*(short *)dst = *(short const *)src;
}
/**
* Copy pixel block 32bit-wise
*
* \param src source address
* \param dst 32bit-aligned destination address
* \param w number of 32bit words to copy per line
* \param h number of lines to copy
* \param src_w width of source buffer in bytes
* \param dst_w width of destination buffer in bytes
*/
static inline void copy_block_32bit(char const *src, int src_w,
char *dst, int dst_w,
int w, int h)
{
src_w -= w*4;
dst_w -= w*4;
for (; h--; src += src_w, dst += dst_w) {
for (int i = w; i--; src += 4, dst += 4)
*((int *)dst) = *((int const *)src);
}
}
/**
* Copy pixel block 64bit-wise
*
* \param src source address
* \param dst 64bit-aligned destination address
* \param w number of 32bit words to copy per line
* \param h number of lines to copy
* \param src_w width of source buffer in bytes
* \param dst_w width of destination buffer in bytes
*/
static inline void copy_block_64bit(char const *src, int src_w,
char *dst, int dst_w,
int w, int h)
{
src_w -= w*8;
dst_w -= w*8;
for (; h--; src += src_w, dst += dst_w) {
for (int i = w; i--; src += 8, dst += 8)
*((Genode::uint64_t *)dst) = *((Genode::uint64_t const *)src);
}
}
/**
* Copy block with a size of multiple of 32 bytes
*
* \param w width in 32 byte chunks to copy per line
* \param h number of lines of copy
*/
static inline void copy_block_32byte(char const *src, int src_w,
char *dst, int dst_w,
int w, int h)
{
for (; h > 0; h--) {
copy_block_64bit(src, src_w, dst, dst_w, w*4, 1);
src += src_w;
dst += dst_w;
}
}
#endif /* _LIB__BLIT__SPEC__ARM_64__BLIT_HELPER_H_ */