mirror of
https://github.com/FFmpeg/FFmpeg.git
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74 lines
2.1 KiB
C
74 lines
2.1 KiB
C
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/*
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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 "config.h"
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#include "libavutil/attributes.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/svq1enc.h"
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#if HAVE_INLINE_ASM
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static int ssd_int8_vs_int16_mmx(const int8_t *pix1, const int16_t *pix2,
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int size)
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{
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int sum;
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x86_reg i = size;
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__asm__ volatile (
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"pxor %%mm4, %%mm4 \n"
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"1: \n"
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"sub $8, %0 \n"
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"movq (%2, %0), %%mm2 \n"
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"movq (%3, %0, 2), %%mm0 \n"
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"movq 8(%3, %0, 2), %%mm1 \n"
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"punpckhbw %%mm2, %%mm3 \n"
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"punpcklbw %%mm2, %%mm2 \n"
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"psraw $8, %%mm3 \n"
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"psraw $8, %%mm2 \n"
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"psubw %%mm3, %%mm1 \n"
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"psubw %%mm2, %%mm0 \n"
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"pmaddwd %%mm1, %%mm1 \n"
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"pmaddwd %%mm0, %%mm0 \n"
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"paddd %%mm1, %%mm4 \n"
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"paddd %%mm0, %%mm4 \n"
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"jg 1b \n"
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"movq %%mm4, %%mm3 \n"
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"psrlq $32, %%mm3 \n"
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"paddd %%mm3, %%mm4 \n"
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"movd %%mm4, %1 \n"
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: "+r" (i), "=r" (sum)
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: "r" (pix1), "r" (pix2));
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return sum;
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}
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#endif /* HAVE_INLINE_ASM */
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av_cold void ff_svq1enc_init_x86(SVQ1EncContext *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->ssd_int8_vs_int16 = ssd_int8_vs_int16_mmx;
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}
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#endif /* HAVE_INLINE_ASM */
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}
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