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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 "config.h"
#include "libavutil/attributes.h"
#include "libavutil/cpu.h"
#include "libavutil/x86/asm.h"
#include "libavutil/x86/cpu.h"
#include "libavcodec/svq1enc.h"
#if HAVE_INLINE_ASM
static int ssd_int8_vs_int16_mmx(const int8_t *pix1, const int16_t *pix2,
int size)
{
int sum;
x86_reg i = size;
__asm__ volatile (
"pxor %%mm4, %%mm4 \n"
"1: \n"
"sub $8, %0 \n"
"movq (%2, %0), %%mm2 \n"
"movq (%3, %0, 2), %%mm0 \n"
"movq 8(%3, %0, 2), %%mm1 \n"
"punpckhbw %%mm2, %%mm3 \n"
"punpcklbw %%mm2, %%mm2 \n"
"psraw $8, %%mm3 \n"
"psraw $8, %%mm2 \n"
"psubw %%mm3, %%mm1 \n"
"psubw %%mm2, %%mm0 \n"
"pmaddwd %%mm1, %%mm1 \n"
"pmaddwd %%mm0, %%mm0 \n"
"paddd %%mm1, %%mm4 \n"
"paddd %%mm0, %%mm4 \n"
"jg 1b \n"
"movq %%mm4, %%mm3 \n"
"psrlq $32, %%mm3 \n"
"paddd %%mm3, %%mm4 \n"
"movd %%mm4, %1 \n"
: "+r" (i), "=r" (sum)
: "r" (pix1), "r" (pix2));
return sum;
}
#endif /* HAVE_INLINE_ASM */
av_cold void ff_svq1enc_init_x86(SVQ1EncContext *c)
{
#if HAVE_INLINE_ASM
int cpu_flags = av_get_cpu_flags();
if (INLINE_MMX(cpu_flags)) {
c->ssd_int8_vs_int16 = ssd_int8_vs_int16_mmx;
}
#endif /* HAVE_INLINE_ASM */
}
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