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/*
* This file is part of Libav.
*
* Libav is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* Libav 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <stdint.h>
#include "config.h"
#include "libavutil/attributes.h"
#include "libavutil/internal.h"
#include "libavutil/cpu.h"
#include "libavutil/x86/asm.h"
#include "libavutil/x86/cpu.h"
#include "libavcodec/blockdsp.h"
#if HAVE_INLINE_ASM
#define CLEAR_BLOCKS(name, n) \
static void name(int16_t *blocks) \
{ \
__asm__ volatile ( \
"pxor %%mm7, %%mm7 \n\t" \
"mov %1, %%"FF_REG_a" \n\t" \
"1: \n\t" \
"movq %%mm7, (%0, %%"FF_REG_a") \n\t" \
"movq %%mm7, 8(%0, %%"FF_REG_a") \n\t" \
"movq %%mm7, 16(%0, %%"FF_REG_a") \n\t" \
"movq %%mm7, 24(%0, %%"FF_REG_a") \n\t" \
"add $32, %%"FF_REG_a" \n\t" \
"js 1b \n\t" \
:: "r"(((uint8_t *) blocks) + 128 * n), \
"i"(-128 * n) \
: "%"FF_REG_a); \
}
CLEAR_BLOCKS(clear_blocks_mmx, 6)
CLEAR_BLOCKS(clear_block_mmx, 1)
static void clear_block_sse(int16_t *block)
{
__asm__ volatile (
"xorps %%xmm0, %%xmm0 \n"
"movaps %%xmm0, (%0) \n"
"movaps %%xmm0, 16(%0) \n"
"movaps %%xmm0, 32(%0) \n"
"movaps %%xmm0, 48(%0) \n"
"movaps %%xmm0, 64(%0) \n"
"movaps %%xmm0, 80(%0) \n"
"movaps %%xmm0, 96(%0) \n"
"movaps %%xmm0, 112(%0) \n"
:: "r" (block)
: "memory");
}
static void clear_blocks_sse(int16_t *blocks)
{
__asm__ volatile (
"xorps %%xmm0, %%xmm0 \n"
"mov %1, %%"FF_REG_a" \n"
"1: \n"
"movaps %%xmm0, (%0, %%"FF_REG_a") \n"
"movaps %%xmm0, 16(%0, %%"FF_REG_a") \n"
"movaps %%xmm0, 32(%0, %%"FF_REG_a") \n"
"movaps %%xmm0, 48(%0, %%"FF_REG_a") \n"
"movaps %%xmm0, 64(%0, %%"FF_REG_a") \n"
"movaps %%xmm0, 80(%0, %%"FF_REG_a") \n"
"movaps %%xmm0, 96(%0, %%"FF_REG_a") \n"
"movaps %%xmm0, 112(%0, %%"FF_REG_a") \n"
"add $128, %%"FF_REG_a" \n"
"js 1b \n"
:: "r"(((uint8_t *) blocks) + 128 * 6), "i"(-128 * 6)
: "%"FF_REG_a);
}
#endif /* HAVE_INLINE_ASM */
av_cold void ff_blockdsp_init_x86(BlockDSPContext *c)
{
#if HAVE_INLINE_ASM
int cpu_flags = av_get_cpu_flags();
if (INLINE_MMX(cpu_flags)) {
c->clear_block = clear_block_mmx;
c->clear_blocks = clear_blocks_mmx;
}
if (INLINE_SSE(cpu_flags)) {
c->clear_block = clear_block_sse;
c->clear_blocks = clear_blocks_sse;
}
#endif /* HAVE_INLINE_ASM */
}
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