mirror of
https://github.com/FFmpeg/FFmpeg.git
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107 lines
3.7 KiB
C
107 lines
3.7 KiB
C
/*
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* This file is part of Libav.
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*
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* Libav is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* Libav is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with Libav; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include <stdint.h>
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#include "config.h"
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#include "libavutil/attributes.h"
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#include "libavutil/internal.h"
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#include "libavutil/cpu.h"
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#include "libavutil/x86/asm.h"
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#include "libavutil/x86/cpu.h"
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#include "libavcodec/blockdsp.h"
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#if HAVE_INLINE_ASM
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#define CLEAR_BLOCKS(name, n) \
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static void name(int16_t *blocks) \
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{ \
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__asm__ volatile ( \
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"pxor %%mm7, %%mm7 \n\t" \
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"mov %1, %%"FF_REG_a" \n\t" \
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"1: \n\t" \
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"movq %%mm7, (%0, %%"FF_REG_a") \n\t" \
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"movq %%mm7, 8(%0, %%"FF_REG_a") \n\t" \
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"movq %%mm7, 16(%0, %%"FF_REG_a") \n\t" \
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"movq %%mm7, 24(%0, %%"FF_REG_a") \n\t" \
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"add $32, %%"FF_REG_a" \n\t" \
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"js 1b \n\t" \
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:: "r"(((uint8_t *) blocks) + 128 * n), \
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"i"(-128 * n) \
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: "%"FF_REG_a); \
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}
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CLEAR_BLOCKS(clear_blocks_mmx, 6)
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CLEAR_BLOCKS(clear_block_mmx, 1)
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static void clear_block_sse(int16_t *block)
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{
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__asm__ volatile (
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"xorps %%xmm0, %%xmm0 \n"
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"movaps %%xmm0, (%0) \n"
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"movaps %%xmm0, 16(%0) \n"
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"movaps %%xmm0, 32(%0) \n"
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"movaps %%xmm0, 48(%0) \n"
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"movaps %%xmm0, 64(%0) \n"
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"movaps %%xmm0, 80(%0) \n"
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"movaps %%xmm0, 96(%0) \n"
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"movaps %%xmm0, 112(%0) \n"
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:: "r" (block)
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: "memory");
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}
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static void clear_blocks_sse(int16_t *blocks)
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{
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__asm__ volatile (
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"xorps %%xmm0, %%xmm0 \n"
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"mov %1, %%"FF_REG_a" \n"
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"1: \n"
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"movaps %%xmm0, (%0, %%"FF_REG_a") \n"
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"movaps %%xmm0, 16(%0, %%"FF_REG_a") \n"
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"movaps %%xmm0, 32(%0, %%"FF_REG_a") \n"
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"movaps %%xmm0, 48(%0, %%"FF_REG_a") \n"
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"movaps %%xmm0, 64(%0, %%"FF_REG_a") \n"
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"movaps %%xmm0, 80(%0, %%"FF_REG_a") \n"
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"movaps %%xmm0, 96(%0, %%"FF_REG_a") \n"
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"movaps %%xmm0, 112(%0, %%"FF_REG_a") \n"
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"add $128, %%"FF_REG_a" \n"
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"js 1b \n"
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:: "r"(((uint8_t *) blocks) + 128 * 6), "i"(-128 * 6)
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: "%"FF_REG_a);
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}
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#endif /* HAVE_INLINE_ASM */
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av_cold void ff_blockdsp_init_x86(BlockDSPContext *c)
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{
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#if HAVE_INLINE_ASM
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int cpu_flags = av_get_cpu_flags();
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if (INLINE_MMX(cpu_flags)) {
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c->clear_block = clear_block_mmx;
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c->clear_blocks = clear_blocks_mmx;
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}
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if (INLINE_SSE(cpu_flags)) {
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c->clear_block = clear_block_sse;
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c->clear_blocks = clear_blocks_sse;
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}
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#endif /* HAVE_INLINE_ASM */
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}
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