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Diffstat (limited to 'libavcodec/x86/png_mmx.c')
| -rw-r--r-- | libavcodec/x86/png_mmx.c | 143 |
1 files changed, 143 insertions, 0 deletions
diff --git a/libavcodec/x86/png_mmx.c b/libavcodec/x86/png_mmx.c new file mode 100644 index 0000000..3b28412 --- /dev/null +++ b/libavcodec/x86/png_mmx.c @@ -0,0 +1,143 @@ +/* + * MMX optimized PNG utils + * Copyright (c) 2008 Loren Merritt + * + * This file is part of FFmpeg. + * + * FFmpeg 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. + * + * FFmpeg 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 FFmpeg; 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/dsputil.h" +#include "libavcodec/png.h" +#include "dsputil_mmx.h" + +//#undef NDEBUG +//#include <assert.h> + +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]; +} + +#define PAETH(cpu, abs3)\ +static void add_paeth_prediction_##cpu(uint8_t *dst, uint8_t *src, uint8_t *top, int w, int bpp)\ +{\ + x86_reg i, end;\ + if(bpp>4) add_paeth_prediction_##cpu(dst+bpp/2, src+bpp/2, top+bpp/2, w-bpp/2, -bpp);\ + if(bpp<0) bpp=-bpp;\ + i= -bpp;\ + 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"\ + "paddw %%mm6, %%mm0 \n"\ + "paddw %%mm2, %%mm3 \n"\ + "paddw %%mm3, %%mm0 \n"\ + "pand %6 , %%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 + +void ff_png_init_mmx(PNGDecContext *s) +{ + int mm_flags = av_get_cpu_flags(); + + if (mm_flags & AV_CPU_FLAG_MMX2) { + s->add_bytes_l2 = add_bytes_l2_mmx; + s->add_paeth_prediction = add_paeth_prediction_mmx2; +#if HAVE_SSSE3 + if (mm_flags & AV_CPU_FLAG_SSSE3) + s->add_paeth_prediction = add_paeth_prediction_ssse3; +#endif + } +} |
