mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-12-18 03:19:31 +02:00
136 lines
4.4 KiB
C
136 lines
4.4 KiB
C
/*
|
|
* x86 PNG optimizations.
|
|
* Copyright (c) 2008 Loren Merrit <lorenm@u.washington.edu>
|
|
*
|
|
* 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 "libavutil/cpu.h"
|
|
#include "libavutil/x86_cpu.h"
|
|
#include "libavcodec/pngdsp.h"
|
|
#include "dsputil_mmx.h"
|
|
|
|
#define PAETH(cpu, abs3)\
|
|
static void add_png_paeth_prediction_##cpu(uint8_t *dst, uint8_t *src, uint8_t *top, int w, int bpp)\
|
|
{\
|
|
x86_reg i = -bpp;\
|
|
x86_reg end = w-3;\
|
|
__asm__ volatile(\
|
|
"pxor %%mm7, %%mm7 \n"\
|
|
"movd (%1,%0), %%mm0 \n"\
|
|
"movd (%2,%0), %%mm1 \n"\
|
|
"punpcklbw %%mm7, %%mm0 \n"\
|
|
"punpcklbw %%mm7, %%mm1 \n"\
|
|
"add %4, %0 \n"\
|
|
"1: \n"\
|
|
"movq %%mm1, %%mm2 \n"\
|
|
"movd (%2,%0), %%mm1 \n"\
|
|
"movq %%mm2, %%mm3 \n"\
|
|
"punpcklbw %%mm7, %%mm1 \n"\
|
|
"movq %%mm2, %%mm4 \n"\
|
|
"psubw %%mm1, %%mm3 \n"\
|
|
"psubw %%mm0, %%mm4 \n"\
|
|
"movq %%mm3, %%mm5 \n"\
|
|
"paddw %%mm4, %%mm5 \n"\
|
|
abs3\
|
|
"movq %%mm4, %%mm6 \n"\
|
|
"pminsw %%mm5, %%mm6 \n"\
|
|
"pcmpgtw %%mm6, %%mm3 \n"\
|
|
"pcmpgtw %%mm5, %%mm4 \n"\
|
|
"movq %%mm4, %%mm6 \n"\
|
|
"pand %%mm3, %%mm4 \n"\
|
|
"pandn %%mm3, %%mm6 \n"\
|
|
"pandn %%mm0, %%mm3 \n"\
|
|
"movd (%3,%0), %%mm0 \n"\
|
|
"pand %%mm1, %%mm6 \n"\
|
|
"pand %%mm4, %%mm2 \n"\
|
|
"punpcklbw %%mm7, %%mm0 \n"\
|
|
"movq %6, %%mm5 \n"\
|
|
"paddw %%mm6, %%mm0 \n"\
|
|
"paddw %%mm2, %%mm3 \n"\
|
|
"paddw %%mm3, %%mm0 \n"\
|
|
"pand %%mm5, %%mm0 \n"\
|
|
"movq %%mm0, %%mm3 \n"\
|
|
"packuswb %%mm3, %%mm3 \n"\
|
|
"movd %%mm3, (%1,%0) \n"\
|
|
"add %4, %0 \n"\
|
|
"cmp %5, %0 \n"\
|
|
"jle 1b \n"\
|
|
:"+r"(i)\
|
|
:"r"(dst), "r"(top), "r"(src), "r"((x86_reg)bpp), "g"(end),\
|
|
"m"(ff_pw_255)\
|
|
:"memory"\
|
|
);\
|
|
}
|
|
|
|
#define ABS3_MMX2\
|
|
"psubw %%mm5, %%mm7 \n"\
|
|
"pmaxsw %%mm7, %%mm5 \n"\
|
|
"pxor %%mm6, %%mm6 \n"\
|
|
"pxor %%mm7, %%mm7 \n"\
|
|
"psubw %%mm3, %%mm6 \n"\
|
|
"psubw %%mm4, %%mm7 \n"\
|
|
"pmaxsw %%mm6, %%mm3 \n"\
|
|
"pmaxsw %%mm7, %%mm4 \n"\
|
|
"pxor %%mm7, %%mm7 \n"
|
|
|
|
#define ABS3_SSSE3\
|
|
"pabsw %%mm3, %%mm3 \n"\
|
|
"pabsw %%mm4, %%mm4 \n"\
|
|
"pabsw %%mm5, %%mm5 \n"
|
|
|
|
PAETH(mmx2, ABS3_MMX2)
|
|
#if HAVE_SSSE3
|
|
PAETH(ssse3, ABS3_SSSE3)
|
|
#endif
|
|
|
|
static void add_bytes_l2_mmx(uint8_t *dst, uint8_t *src1, uint8_t *src2, int w)
|
|
{
|
|
x86_reg i=0;
|
|
|
|
__asm__ volatile(
|
|
"jmp 2f \n\t"
|
|
"1: \n\t"
|
|
"movq (%2, %0), %%mm0 \n\t"
|
|
"movq 8(%2, %0), %%mm1 \n\t"
|
|
"paddb (%3, %0), %%mm0 \n\t"
|
|
"paddb 8(%3, %0), %%mm1 \n\t"
|
|
"movq %%mm0, (%1, %0) \n\t"
|
|
"movq %%mm1, 8(%1, %0) \n\t"
|
|
"add $16, %0 \n\t"
|
|
"2: \n\t"
|
|
"cmp %4, %0 \n\t"
|
|
" js 1b \n\t"
|
|
: "+r" (i)
|
|
: "r"(dst), "r"(src1), "r"(src2), "r"((x86_reg) w - 15)
|
|
);
|
|
for (; i < w; i++)
|
|
dst[i] = src1[i] + src2[i];
|
|
}
|
|
|
|
void ff_pngdsp_init_x86(PNGDSPContext *dsp)
|
|
{
|
|
int flags = av_get_cpu_flags();
|
|
|
|
if (flags & AV_CPU_FLAG_MMX)
|
|
dsp->add_bytes_l2 = add_bytes_l2_mmx;
|
|
if (flags & AV_CPU_FLAG_MMX2)
|
|
dsp->add_paeth_prediction = add_png_paeth_prediction_mmx2;
|
|
if (flags & AV_CPU_FLAG_SSSE3)
|
|
dsp->add_paeth_prediction = add_png_paeth_prediction_ssse3;
|
|
}
|