dsputilenc_mmx.c

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/*
 * MMX optimized DSP utils
 * Copyright (c) 2000, 2001 Fabrice Bellard
 * Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
 *
 * MMX optimization by Nick Kurshev <nickols_k@mail.ru>
 *
 * 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/attributes.h"
#include "libavutil/cpu.h"
#include "libavutil/x86/asm.h"
#include "libavutil/x86/cpu.h"
#include "libavcodec/dct.h"
#include "libavcodec/dsputil.h"
#include "libavcodec/mpegvideo.h"
#include "libavcodec/mathops.h"
#include "dsputil_mmx.h"

void ff_get_pixels_mmx(int16_t *block, const uint8_t *pixels, int line_size);
void ff_get_pixels_sse2(int16_t *block, const uint8_t *pixels, int line_size);
void ff_diff_pixels_mmx(int16_t *block, const uint8_t *s1, const uint8_t *s2, int stride);
int ff_pix_sum16_mmx(uint8_t * pix, int line_size);
int ff_pix_norm1_mmx(uint8_t *pix, int line_size);

#if HAVE_INLINE_ASM

static int sse8_mmx(void *v, uint8_t * pix1, uint8_t * pix2, int line_size, int h) {
    int tmp;
  __asm__ volatile (
      "movl %4,%%ecx\n"
      "shr $1,%%ecx\n"
      "pxor %%mm0,%%mm0\n"      /* mm0 = 0 */
      "pxor %%mm7,%%mm7\n"      /* mm7 holds the sum */
      "1:\n"
      "movq (%0),%%mm1\n"       /* mm1 = pix1[0][0-7] */
      "movq (%1),%%mm2\n"       /* mm2 = pix2[0][0-7] */
      "movq (%0,%3),%%mm3\n"    /* mm3 = pix1[1][0-7] */
      "movq (%1,%3),%%mm4\n"    /* mm4 = pix2[1][0-7] */

      /* todo: mm1-mm2, mm3-mm4 */
      /* algo: subtract mm1 from mm2 with saturation and vice versa */
      /*       OR the results to get absolute difference */
      "movq %%mm1,%%mm5\n"
      "movq %%mm3,%%mm6\n"
      "psubusb %%mm2,%%mm1\n"
      "psubusb %%mm4,%%mm3\n"
      "psubusb %%mm5,%%mm2\n"
      "psubusb %%mm6,%%mm4\n"

      "por %%mm1,%%mm2\n"
      "por %%mm3,%%mm4\n"

      /* now convert to 16-bit vectors so we can square them */
      "movq %%mm2,%%mm1\n"
      "movq %%mm4,%%mm3\n"

      "punpckhbw %%mm0,%%mm2\n"
      "punpckhbw %%mm0,%%mm4\n"
      "punpcklbw %%mm0,%%mm1\n" /* mm1 now spread over (mm1,mm2) */
      "punpcklbw %%mm0,%%mm3\n" /* mm4 now spread over (mm3,mm4) */

      "pmaddwd %%mm2,%%mm2\n"
      "pmaddwd %%mm4,%%mm4\n"
      "pmaddwd %%mm1,%%mm1\n"
      "pmaddwd %%mm3,%%mm3\n"

      "lea (%0,%3,2), %0\n"     /* pix1 += 2*line_size */
      "lea (%1,%3,2), %1\n"     /* pix2 += 2*line_size */

      "paddd %%mm2,%%mm1\n"
      "paddd %%mm4,%%mm3\n"
      "paddd %%mm1,%%mm7\n"
      "paddd %%mm3,%%mm7\n"

      "decl %%ecx\n"
      "jnz 1b\n"

      "movq %%mm7,%%mm1\n"
      "psrlq $32, %%mm7\n"      /* shift hi dword to lo */
      "paddd %%mm7,%%mm1\n"
      "movd %%mm1,%2\n"
      : "+r" (pix1), "+r" (pix2), "=r"(tmp)
      : "r" ((x86_reg)line_size) , "m" (h)
      : "%ecx");
    return tmp;
}

static int sse16_mmx(void *v, uint8_t * pix1, uint8_t * pix2, int line_size, int h) {
    int tmp;
  __asm__ volatile (
      "movl %4,%%ecx\n"
      "pxor %%mm0,%%mm0\n"      /* mm0 = 0 */
      "pxor %%mm7,%%mm7\n"      /* mm7 holds the sum */
      "1:\n"
      "movq (%0),%%mm1\n"       /* mm1 = pix1[0-7] */
      "movq (%1),%%mm2\n"       /* mm2 = pix2[0-7] */
      "movq 8(%0),%%mm3\n"      /* mm3 = pix1[8-15] */
      "movq 8(%1),%%mm4\n"      /* mm4 = pix2[8-15] */

      /* todo: mm1-mm2, mm3-mm4 */
      /* algo: subtract mm1 from mm2 with saturation and vice versa */
      /*       OR the results to get absolute difference */
      "movq %%mm1,%%mm5\n"
      "movq %%mm3,%%mm6\n"
      "psubusb %%mm2,%%mm1\n"
      "psubusb %%mm4,%%mm3\n"
      "psubusb %%mm5,%%mm2\n"
      "psubusb %%mm6,%%mm4\n"

      "por %%mm1,%%mm2\n"
      "por %%mm3,%%mm4\n"

      /* now convert to 16-bit vectors so we can square them */
      "movq %%mm2,%%mm1\n"
      "movq %%mm4,%%mm3\n"

      "punpckhbw %%mm0,%%mm2\n"
      "punpckhbw %%mm0,%%mm4\n"
      "punpcklbw %%mm0,%%mm1\n" /* mm1 now spread over (mm1,mm2) */
      "punpcklbw %%mm0,%%mm3\n" /* mm4 now spread over (mm3,mm4) */

      "pmaddwd %%mm2,%%mm2\n"
      "pmaddwd %%mm4,%%mm4\n"
      "pmaddwd %%mm1,%%mm1\n"
      "pmaddwd %%mm3,%%mm3\n"

      "add %3,%0\n"
      "add %3,%1\n"

      "paddd %%mm2,%%mm1\n"
      "paddd %%mm4,%%mm3\n"
      "paddd %%mm1,%%mm7\n"
      "paddd %%mm3,%%mm7\n"

      "decl %%ecx\n"
      "jnz 1b\n"

      "movq %%mm7,%%mm1\n"
      "psrlq $32, %%mm7\n"      /* shift hi dword to lo */
      "paddd %%mm7,%%mm1\n"
      "movd %%mm1,%2\n"
      : "+r" (pix1), "+r" (pix2), "=r"(tmp)
      : "r" ((x86_reg)line_size) , "m" (h)
      : "%ecx");
    return tmp;
}

static int hf_noise8_mmx(uint8_t * pix1, int line_size, int h) {
    int tmp;
  __asm__ volatile (
      "movl %3,%%ecx\n"
      "pxor %%mm7,%%mm7\n"
      "pxor %%mm6,%%mm6\n"

      "movq (%0),%%mm0\n"
      "movq %%mm0, %%mm1\n"
      "psllq $8, %%mm0\n"
      "psrlq $8, %%mm1\n"
      "psrlq $8, %%mm0\n"
      "movq %%mm0, %%mm2\n"
      "movq %%mm1, %%mm3\n"
      "punpcklbw %%mm7,%%mm0\n"
      "punpcklbw %%mm7,%%mm1\n"
      "punpckhbw %%mm7,%%mm2\n"
      "punpckhbw %%mm7,%%mm3\n"
      "psubw %%mm1, %%mm0\n"
      "psubw %%mm3, %%mm2\n"

      "add %2,%0\n"

      "movq (%0),%%mm4\n"
      "movq %%mm4, %%mm1\n"
      "psllq $8, %%mm4\n"
      "psrlq $8, %%mm1\n"
      "psrlq $8, %%mm4\n"
      "movq %%mm4, %%mm5\n"
      "movq %%mm1, %%mm3\n"
      "punpcklbw %%mm7,%%mm4\n"
      "punpcklbw %%mm7,%%mm1\n"
      "punpckhbw %%mm7,%%mm5\n"
      "punpckhbw %%mm7,%%mm3\n"
      "psubw %%mm1, %%mm4\n"
      "psubw %%mm3, %%mm5\n"
      "psubw %%mm4, %%mm0\n"
      "psubw %%mm5, %%mm2\n"
      "pxor %%mm3, %%mm3\n"
      "pxor %%mm1, %%mm1\n"
      "pcmpgtw %%mm0, %%mm3\n\t"
      "pcmpgtw %%mm2, %%mm1\n\t"
      "pxor %%mm3, %%mm0\n"
      "pxor %%mm1, %%mm2\n"
      "psubw %%mm3, %%mm0\n"
      "psubw %%mm1, %%mm2\n"
      "paddw %%mm0, %%mm2\n"
      "paddw %%mm2, %%mm6\n"

      "add %2,%0\n"
      "1:\n"

      "movq (%0),%%mm0\n"
      "movq %%mm0, %%mm1\n"
      "psllq $8, %%mm0\n"
      "psrlq $8, %%mm1\n"
      "psrlq $8, %%mm0\n"
      "movq %%mm0, %%mm2\n"
      "movq %%mm1, %%mm3\n"
      "punpcklbw %%mm7,%%mm0\n"
      "punpcklbw %%mm7,%%mm1\n"
      "punpckhbw %%mm7,%%mm2\n"
      "punpckhbw %%mm7,%%mm3\n"
      "psubw %%mm1, %%mm0\n"
      "psubw %%mm3, %%mm2\n"
      "psubw %%mm0, %%mm4\n"
      "psubw %%mm2, %%mm5\n"
      "pxor %%mm3, %%mm3\n"
      "pxor %%mm1, %%mm1\n"
      "pcmpgtw %%mm4, %%mm3\n\t"
      "pcmpgtw %%mm5, %%mm1\n\t"
      "pxor %%mm3, %%mm4\n"
      "pxor %%mm1, %%mm5\n"
      "psubw %%mm3, %%mm4\n"
      "psubw %%mm1, %%mm5\n"
      "paddw %%mm4, %%mm5\n"
      "paddw %%mm5, %%mm6\n"

      "add %2,%0\n"

      "movq (%0),%%mm4\n"
      "movq %%mm4, %%mm1\n"
      "psllq $8, %%mm4\n"
      "psrlq $8, %%mm1\n"
      "psrlq $8, %%mm4\n"
      "movq %%mm4, %%mm5\n"
      "movq %%mm1, %%mm3\n"
      "punpcklbw %%mm7,%%mm4\n"
      "punpcklbw %%mm7,%%mm1\n"
      "punpckhbw %%mm7,%%mm5\n"
      "punpckhbw %%mm7,%%mm3\n"
      "psubw %%mm1, %%mm4\n"
      "psubw %%mm3, %%mm5\n"
      "psubw %%mm4, %%mm0\n"
      "psubw %%mm5, %%mm2\n"
      "pxor %%mm3, %%mm3\n"
      "pxor %%mm1, %%mm1\n"
      "pcmpgtw %%mm0, %%mm3\n\t"
      "pcmpgtw %%mm2, %%mm1\n\t"
      "pxor %%mm3, %%mm0\n"
      "pxor %%mm1, %%mm2\n"
      "psubw %%mm3, %%mm0\n"
      "psubw %%mm1, %%mm2\n"
      "paddw %%mm0, %%mm2\n"
      "paddw %%mm2, %%mm6\n"

      "add %2,%0\n"
      "subl $2, %%ecx\n"
      " jnz 1b\n"

      "movq %%mm6, %%mm0\n"
      "punpcklwd %%mm7,%%mm0\n"
      "punpckhwd %%mm7,%%mm6\n"
      "paddd %%mm0, %%mm6\n"

      "movq %%mm6,%%mm0\n"
      "psrlq $32, %%mm6\n"
      "paddd %%mm6,%%mm0\n"
      "movd %%mm0,%1\n"
      : "+r" (pix1), "=r"(tmp)
      : "r" ((x86_reg)line_size) , "g" (h-2)
      : "%ecx");
      return tmp;
}

static int hf_noise16_mmx(uint8_t * pix1, int line_size, int h) {
    int tmp;
    uint8_t * pix= pix1;
  __asm__ volatile (
      "movl %3,%%ecx\n"
      "pxor %%mm7,%%mm7\n"
      "pxor %%mm6,%%mm6\n"

      "movq (%0),%%mm0\n"
      "movq 1(%0),%%mm1\n"
      "movq %%mm0, %%mm2\n"
      "movq %%mm1, %%mm3\n"
      "punpcklbw %%mm7,%%mm0\n"
      "punpcklbw %%mm7,%%mm1\n"
      "punpckhbw %%mm7,%%mm2\n"
      "punpckhbw %%mm7,%%mm3\n"
      "psubw %%mm1, %%mm0\n"
      "psubw %%mm3, %%mm2\n"

      "add %2,%0\n"

      "movq (%0),%%mm4\n"
      "movq 1(%0),%%mm1\n"
      "movq %%mm4, %%mm5\n"
      "movq %%mm1, %%mm3\n"
      "punpcklbw %%mm7,%%mm4\n"
      "punpcklbw %%mm7,%%mm1\n"
      "punpckhbw %%mm7,%%mm5\n"
      "punpckhbw %%mm7,%%mm3\n"
      "psubw %%mm1, %%mm4\n"
      "psubw %%mm3, %%mm5\n"
      "psubw %%mm4, %%mm0\n"
      "psubw %%mm5, %%mm2\n"
      "pxor %%mm3, %%mm3\n"
      "pxor %%mm1, %%mm1\n"
      "pcmpgtw %%mm0, %%mm3\n\t"
      "pcmpgtw %%mm2, %%mm1\n\t"
      "pxor %%mm3, %%mm0\n"
      "pxor %%mm1, %%mm2\n"
      "psubw %%mm3, %%mm0\n"
      "psubw %%mm1, %%mm2\n"
      "paddw %%mm0, %%mm2\n"
      "paddw %%mm2, %%mm6\n"

      "add %2,%0\n"
      "1:\n"

      "movq (%0),%%mm0\n"
      "movq 1(%0),%%mm1\n"
      "movq %%mm0, %%mm2\n"
      "movq %%mm1, %%mm3\n"
      "punpcklbw %%mm7,%%mm0\n"
      "punpcklbw %%mm7,%%mm1\n"
      "punpckhbw %%mm7,%%mm2\n"
      "punpckhbw %%mm7,%%mm3\n"
      "psubw %%mm1, %%mm0\n"
      "psubw %%mm3, %%mm2\n"
      "psubw %%mm0, %%mm4\n"
      "psubw %%mm2, %%mm5\n"
      "pxor %%mm3, %%mm3\n"
      "pxor %%mm1, %%mm1\n"
      "pcmpgtw %%mm4, %%mm3\n\t"
      "pcmpgtw %%mm5, %%mm1\n\t"
      "pxor %%mm3, %%mm4\n"
      "pxor %%mm1, %%mm5\n"
      "psubw %%mm3, %%mm4\n"
      "psubw %%mm1, %%mm5\n"
      "paddw %%mm4, %%mm5\n"
      "paddw %%mm5, %%mm6\n"

      "add %2,%0\n"

      "movq (%0),%%mm4\n"
      "movq 1(%0),%%mm1\n"
      "movq %%mm4, %%mm5\n"
      "movq %%mm1, %%mm3\n"
      "punpcklbw %%mm7,%%mm4\n"
      "punpcklbw %%mm7,%%mm1\n"
      "punpckhbw %%mm7,%%mm5\n"
      "punpckhbw %%mm7,%%mm3\n"
      "psubw %%mm1, %%mm4\n"
      "psubw %%mm3, %%mm5\n"
      "psubw %%mm4, %%mm0\n"
      "psubw %%mm5, %%mm2\n"
      "pxor %%mm3, %%mm3\n"
      "pxor %%mm1, %%mm1\n"
      "pcmpgtw %%mm0, %%mm3\n\t"
      "pcmpgtw %%mm2, %%mm1\n\t"
      "pxor %%mm3, %%mm0\n"
      "pxor %%mm1, %%mm2\n"
      "psubw %%mm3, %%mm0\n"
      "psubw %%mm1, %%mm2\n"
      "paddw %%mm0, %%mm2\n"
      "paddw %%mm2, %%mm6\n"

      "add %2,%0\n"
      "subl $2, %%ecx\n"
      " jnz 1b\n"

      "movq %%mm6, %%mm0\n"
      "punpcklwd %%mm7,%%mm0\n"
      "punpckhwd %%mm7,%%mm6\n"
      "paddd %%mm0, %%mm6\n"

      "movq %%mm6,%%mm0\n"
      "psrlq $32, %%mm6\n"
      "paddd %%mm6,%%mm0\n"
      "movd %%mm0,%1\n"
      : "+r" (pix1), "=r"(tmp)
      : "r" ((x86_reg)line_size) , "g" (h-2)
      : "%ecx");
      return tmp + hf_noise8_mmx(pix+8, line_size, h);
}

static int nsse16_mmx(void *p, uint8_t * pix1, uint8_t * pix2, int line_size, int h) {
    MpegEncContext *c = p;
    int score1, score2;

    if(c) score1 = c->dsp.sse[0](c, pix1, pix2, line_size, h);
    else  score1 = sse16_mmx(c, pix1, pix2, line_size, h);
    score2= hf_noise16_mmx(pix1, line_size, h) - hf_noise16_mmx(pix2, line_size, h);

    if(c) return score1 + FFABS(score2)*c->avctx->nsse_weight;
    else  return score1 + FFABS(score2)*8;
}

static int nsse8_mmx(void *p, uint8_t * pix1, uint8_t * pix2, int line_size, int h) {
    MpegEncContext *c = p;
    int score1= sse8_mmx(c, pix1, pix2, line_size, h);
    int score2= hf_noise8_mmx(pix1, line_size, h) - hf_noise8_mmx(pix2, line_size, h);

    if(c) return score1 + FFABS(score2)*c->avctx->nsse_weight;
    else  return score1 + FFABS(score2)*8;
}

static int vsad_intra16_mmx(void *v, uint8_t * pix, uint8_t * dummy, int line_size, int h) {
    int tmp;

    av_assert2( (((int)pix) & 7) == 0);
    av_assert2((line_size &7) ==0);

#define SUM(in0, in1, out0, out1) \
      "movq (%0), %%mm2\n"\
      "movq 8(%0), %%mm3\n"\
      "add %2,%0\n"\
      "movq %%mm2, " #out0 "\n"\
      "movq %%mm3, " #out1 "\n"\
      "psubusb " #in0 ", %%mm2\n"\
      "psubusb " #in1 ", %%mm3\n"\
      "psubusb " #out0 ", " #in0 "\n"\
      "psubusb " #out1 ", " #in1 "\n"\
      "por %%mm2, " #in0 "\n"\
      "por %%mm3, " #in1 "\n"\
      "movq " #in0 ", %%mm2\n"\
      "movq " #in1 ", %%mm3\n"\
      "punpcklbw %%mm7, " #in0 "\n"\
      "punpcklbw %%mm7, " #in1 "\n"\
      "punpckhbw %%mm7, %%mm2\n"\
      "punpckhbw %%mm7, %%mm3\n"\
      "paddw " #in1 ", " #in0 "\n"\
      "paddw %%mm3, %%mm2\n"\
      "paddw %%mm2, " #in0 "\n"\
      "paddw " #in0 ", %%mm6\n"


  __asm__ volatile (
      "movl %3,%%ecx\n"
      "pxor %%mm6,%%mm6\n"
      "pxor %%mm7,%%mm7\n"
      "movq (%0),%%mm0\n"
      "movq 8(%0),%%mm1\n"
      "add %2,%0\n"
      "jmp 2f\n"
      "1:\n"

      SUM(%%mm4, %%mm5, %%mm0, %%mm1)
      "2:\n"
      SUM(%%mm0, %%mm1, %%mm4, %%mm5)

      "subl $2, %%ecx\n"
      "jnz 1b\n"

      "movq %%mm6,%%mm0\n"
      "psrlq $32, %%mm6\n"
      "paddw %%mm6,%%mm0\n"
      "movq %%mm0,%%mm6\n"
      "psrlq $16, %%mm0\n"
      "paddw %%mm6,%%mm0\n"
      "movd %%mm0,%1\n"
      : "+r" (pix), "=r"(tmp)
      : "r" ((x86_reg)line_size) , "m" (h)
      : "%ecx");
    return tmp & 0xFFFF;
}
#undef SUM

static int vsad_intra16_mmxext(void *v, uint8_t *pix, uint8_t *dummy,
                               int line_size, int h)
{
    int tmp;

    av_assert2( (((int)pix) & 7) == 0);
    av_assert2((line_size &7) ==0);

#define SUM(in0, in1, out0, out1) \
      "movq (%0), " #out0 "\n"\
      "movq 8(%0), " #out1 "\n"\
      "add %2,%0\n"\
      "psadbw " #out0 ", " #in0 "\n"\
      "psadbw " #out1 ", " #in1 "\n"\
      "paddw " #in1 ", " #in0 "\n"\
      "paddw " #in0 ", %%mm6\n"

  __asm__ volatile (
      "movl %3,%%ecx\n"
      "pxor %%mm6,%%mm6\n"
      "pxor %%mm7,%%mm7\n"
      "movq (%0),%%mm0\n"
      "movq 8(%0),%%mm1\n"
      "add %2,%0\n"
      "jmp 2f\n"
      "1:\n"

      SUM(%%mm4, %%mm5, %%mm0, %%mm1)
      "2:\n"
      SUM(%%mm0, %%mm1, %%mm4, %%mm5)

      "subl $2, %%ecx\n"
      "jnz 1b\n"

      "movd %%mm6,%1\n"
      : "+r" (pix), "=r"(tmp)
      : "r" ((x86_reg)line_size) , "m" (h)
      : "%ecx");
    return tmp;
}
#undef SUM

static int vsad16_mmx(void *v, uint8_t * pix1, uint8_t * pix2, int line_size, int h) {
    int tmp;

    av_assert2( (((int)pix1) & 7) == 0);
    av_assert2( (((int)pix2) & 7) == 0);
    av_assert2((line_size &7) ==0);

#define SUM(in0, in1, out0, out1) \
      "movq (%0),%%mm2\n"\
      "movq (%1)," #out0 "\n"\
      "movq 8(%0),%%mm3\n"\
      "movq 8(%1)," #out1 "\n"\
      "add %3,%0\n"\
      "add %3,%1\n"\
      "psubb " #out0 ", %%mm2\n"\
      "psubb " #out1 ", %%mm3\n"\
      "pxor %%mm7, %%mm2\n"\
      "pxor %%mm7, %%mm3\n"\
      "movq %%mm2, " #out0 "\n"\
      "movq %%mm3, " #out1 "\n"\
      "psubusb " #in0 ", %%mm2\n"\
      "psubusb " #in1 ", %%mm3\n"\
      "psubusb " #out0 ", " #in0 "\n"\
      "psubusb " #out1 ", " #in1 "\n"\
      "por %%mm2, " #in0 "\n"\
      "por %%mm3, " #in1 "\n"\
      "movq " #in0 ", %%mm2\n"\
      "movq " #in1 ", %%mm3\n"\
      "punpcklbw %%mm7, " #in0 "\n"\
      "punpcklbw %%mm7, " #in1 "\n"\
      "punpckhbw %%mm7, %%mm2\n"\
      "punpckhbw %%mm7, %%mm3\n"\
      "paddw " #in1 ", " #in0 "\n"\
      "paddw %%mm3, %%mm2\n"\
      "paddw %%mm2, " #in0 "\n"\
      "paddw " #in0 ", %%mm6\n"


  __asm__ volatile (
      "movl %4,%%ecx\n"
      "pxor %%mm6,%%mm6\n"
      "pcmpeqw %%mm7,%%mm7\n"
      "psllw $15, %%mm7\n"
      "packsswb %%mm7, %%mm7\n"
      "movq (%0),%%mm0\n"
      "movq (%1),%%mm2\n"
      "movq 8(%0),%%mm1\n"
      "movq 8(%1),%%mm3\n"
      "add %3,%0\n"
      "add %3,%1\n"
      "psubb %%mm2, %%mm0\n"
      "psubb %%mm3, %%mm1\n"
      "pxor %%mm7, %%mm0\n"
      "pxor %%mm7, %%mm1\n"
      "jmp 2f\n"
      "1:\n"

      SUM(%%mm4, %%mm5, %%mm0, %%mm1)
      "2:\n"
      SUM(%%mm0, %%mm1, %%mm4, %%mm5)

      "subl $2, %%ecx\n"
      "jnz 1b\n"

      "movq %%mm6,%%mm0\n"
      "psrlq $32, %%mm6\n"
      "paddw %%mm6,%%mm0\n"
      "movq %%mm0,%%mm6\n"
      "psrlq $16, %%mm0\n"
      "paddw %%mm6,%%mm0\n"
      "movd %%mm0,%2\n"
      : "+r" (pix1), "+r" (pix2), "=r"(tmp)
      : "r" ((x86_reg)line_size) , "m" (h)
      : "%ecx");
    return tmp & 0x7FFF;
}
#undef SUM

static int vsad16_mmxext(void *v, uint8_t *pix1, uint8_t *pix2,
                         int line_size, int h)
{
    int tmp;

    av_assert2( (((int)pix1) & 7) == 0);
    av_assert2( (((int)pix2) & 7) == 0);
    av_assert2((line_size &7) ==0);

#define SUM(in0, in1, out0, out1) \
      "movq (%0)," #out0 "\n"\
      "movq (%1),%%mm2\n"\
      "movq 8(%0)," #out1 "\n"\
      "movq 8(%1),%%mm3\n"\
      "add %3,%0\n"\
      "add %3,%1\n"\
      "psubb %%mm2, " #out0 "\n"\
      "psubb %%mm3, " #out1 "\n"\
      "pxor %%mm7, " #out0 "\n"\
      "pxor %%mm7, " #out1 "\n"\
      "psadbw " #out0 ", " #in0 "\n"\
      "psadbw " #out1 ", " #in1 "\n"\
      "paddw " #in1 ", " #in0 "\n"\
      "paddw " #in0 ", %%mm6\n"

  __asm__ volatile (
      "movl %4,%%ecx\n"
      "pxor %%mm6,%%mm6\n"
      "pcmpeqw %%mm7,%%mm7\n"
      "psllw $15, %%mm7\n"
      "packsswb %%mm7, %%mm7\n"
      "movq (%0),%%mm0\n"
      "movq (%1),%%mm2\n"
      "movq 8(%0),%%mm1\n"
      "movq 8(%1),%%mm3\n"
      "add %3,%0\n"
      "add %3,%1\n"
      "psubb %%mm2, %%mm0\n"
      "psubb %%mm3, %%mm1\n"
      "pxor %%mm7, %%mm0\n"
      "pxor %%mm7, %%mm1\n"
      "jmp 2f\n"
      "1:\n"

      SUM(%%mm4, %%mm5, %%mm0, %%mm1)
      "2:\n"
      SUM(%%mm0, %%mm1, %%mm4, %%mm5)

      "subl $2, %%ecx\n"
      "jnz 1b\n"

      "movd %%mm6,%2\n"
      : "+r" (pix1), "+r" (pix2), "=r"(tmp)
      : "r" ((x86_reg)line_size) , "m" (h)
      : "%ecx");
    return tmp;
}
#undef SUM

static void diff_bytes_mmx(uint8_t *dst, const uint8_t *src1, const uint8_t *src2, int w){
    x86_reg i=0;
    if(w>=16)
    __asm__ volatile(
        "1:                             \n\t"
        "movq  (%2, %0), %%mm0          \n\t"
        "movq  (%1, %0), %%mm1          \n\t"
        "psubb %%mm0, %%mm1             \n\t"
        "movq %%mm1, (%3, %0)           \n\t"
        "movq 8(%2, %0), %%mm0          \n\t"
        "movq 8(%1, %0), %%mm1          \n\t"
        "psubb %%mm0, %%mm1             \n\t"
        "movq %%mm1, 8(%3, %0)          \n\t"
        "add $16, %0                    \n\t"
        "cmp %4, %0                     \n\t"
        " jb 1b                         \n\t"
        : "+r" (i)
        : "r"(src1), "r"(src2), "r"(dst), "r"((x86_reg)w-15)
    );
    for(; i<w; i++)
        dst[i+0] = src1[i+0]-src2[i+0];
}

static void sub_hfyu_median_prediction_mmxext(uint8_t *dst, const uint8_t *src1,
                                              const uint8_t *src2, int w,
                                              int *left, int *left_top)
{
    x86_reg i=0;
    uint8_t l, lt;

    __asm__ volatile(
        "movq  (%1, %0), %%mm0          \n\t" // LT
        "psllq $8, %%mm0                \n\t"
        "1:                             \n\t"
        "movq  (%1, %0), %%mm1          \n\t" // T
        "movq  -1(%2, %0), %%mm2        \n\t" // L
        "movq  (%2, %0), %%mm3          \n\t" // X
        "movq %%mm2, %%mm4              \n\t" // L
        "psubb %%mm0, %%mm2             \n\t"
        "paddb %%mm1, %%mm2             \n\t" // L + T - LT
        "movq %%mm4, %%mm5              \n\t" // L
        "pmaxub %%mm1, %%mm4            \n\t" // max(T, L)
        "pminub %%mm5, %%mm1            \n\t" // min(T, L)
        "pminub %%mm2, %%mm4            \n\t"
        "pmaxub %%mm1, %%mm4            \n\t"
        "psubb %%mm4, %%mm3             \n\t" // dst - pred
        "movq %%mm3, (%3, %0)           \n\t"
        "add $8, %0                     \n\t"
        "movq -1(%1, %0), %%mm0         \n\t" // LT
        "cmp %4, %0                     \n\t"
        " jb 1b                         \n\t"
        : "+r" (i)
        : "r"(src1), "r"(src2), "r"(dst), "r"((x86_reg)w)
    );

    l= *left;
    lt= *left_top;

    dst[0]= src2[0] - mid_pred(l, src1[0], (l + src1[0] - lt)&0xFF);

    *left_top= src1[w-1];
    *left    = src2[w-1];
}

#define MMABS_MMX(a,z)\
    "pxor " #z ", " #z "              \n\t"\
    "pcmpgtw " #a ", " #z "           \n\t"\
    "pxor " #z ", " #a "              \n\t"\
    "psubw " #z ", " #a "             \n\t"

#define MMABS_MMXEXT(a, z)                 \
    "pxor " #z ", " #z "              \n\t"\
    "psubw " #a ", " #z "             \n\t"\
    "pmaxsw " #z ", " #a "            \n\t"

#define MMABS_SSSE3(a,z)\
    "pabsw " #a ", " #a "             \n\t"

#define MMABS_SUM(a,z, sum)\
    MMABS(a,z)\
    "paddusw " #a ", " #sum "         \n\t"

/* FIXME: HSUM_* saturates at 64k, while an 8x8 hadamard or dct block can get up to
 * about 100k on extreme inputs. But that's very unlikely to occur in natural video,
 * and it's even more unlikely to not have any alternative mvs/modes with lower cost. */
#define HSUM_MMX(a, t, dst)\
    "movq "#a", "#t"                  \n\t"\
    "psrlq $32, "#a"                  \n\t"\
    "paddusw "#t", "#a"               \n\t"\
    "movq "#a", "#t"                  \n\t"\
    "psrlq $16, "#a"                  \n\t"\
    "paddusw "#t", "#a"               \n\t"\
    "movd "#a", "#dst"                \n\t"\

#define HSUM_MMXEXT(a, t, dst)             \
    "pshufw $0x0E, "#a", "#t"         \n\t"\
    "paddusw "#t", "#a"               \n\t"\
    "pshufw $0x01, "#a", "#t"         \n\t"\
    "paddusw "#t", "#a"               \n\t"\
    "movd "#a", "#dst"                \n\t"\

#define HSUM_SSE2(a, t, dst)\
    "movhlps "#a", "#t"               \n\t"\
    "paddusw "#t", "#a"               \n\t"\
    "pshuflw $0x0E, "#a", "#t"        \n\t"\
    "paddusw "#t", "#a"               \n\t"\
    "pshuflw $0x01, "#a", "#t"        \n\t"\
    "paddusw "#t", "#a"               \n\t"\
    "movd "#a", "#dst"                \n\t"\

#define DCT_SAD4(m,mm,o)\
    "mov"#m" "#o"+ 0(%1), "#mm"2      \n\t"\
    "mov"#m" "#o"+16(%1), "#mm"3      \n\t"\
    "mov"#m" "#o"+32(%1), "#mm"4      \n\t"\
    "mov"#m" "#o"+48(%1), "#mm"5      \n\t"\
    MMABS_SUM(mm##2, mm##6, mm##0)\
    MMABS_SUM(mm##3, mm##7, mm##1)\
    MMABS_SUM(mm##4, mm##6, mm##0)\
    MMABS_SUM(mm##5, mm##7, mm##1)\

#define DCT_SAD_MMX\
    "pxor %%mm0, %%mm0                \n\t"\
    "pxor %%mm1, %%mm1                \n\t"\
    DCT_SAD4(q, %%mm, 0)\
    DCT_SAD4(q, %%mm, 8)\
    DCT_SAD4(q, %%mm, 64)\
    DCT_SAD4(q, %%mm, 72)\
    "paddusw %%mm1, %%mm0             \n\t"\
    HSUM(%%mm0, %%mm1, %0)

#define DCT_SAD_SSE2\
    "pxor %%xmm0, %%xmm0              \n\t"\
    "pxor %%xmm1, %%xmm1              \n\t"\
    DCT_SAD4(dqa, %%xmm, 0)\
    DCT_SAD4(dqa, %%xmm, 64)\
    "paddusw %%xmm1, %%xmm0           \n\t"\
    HSUM(%%xmm0, %%xmm1, %0)

#define DCT_SAD_FUNC(cpu) \
static int sum_abs_dctelem_##cpu(int16_t *block){\
    int sum;\
    __asm__ volatile(\
        DCT_SAD\
        :"=r"(sum)\
        :"r"(block)\
    );\
    return sum&0xFFFF;\
}

#define DCT_SAD       DCT_SAD_MMX
#define HSUM(a,t,dst) HSUM_MMX(a,t,dst)
#define MMABS(a,z)    MMABS_MMX(a,z)
DCT_SAD_FUNC(mmx)
#undef MMABS
#undef HSUM

#define HSUM(a,t,dst) HSUM_MMXEXT(a,t,dst)
#define MMABS(a,z)    MMABS_MMXEXT(a,z)
DCT_SAD_FUNC(mmxext)
#undef HSUM
#undef DCT_SAD

#define DCT_SAD       DCT_SAD_SSE2
#define HSUM(a,t,dst) HSUM_SSE2(a,t,dst)
DCT_SAD_FUNC(sse2)
#undef MMABS

#if HAVE_SSSE3_INLINE
#define MMABS(a,z)    MMABS_SSSE3(a,z)
DCT_SAD_FUNC(ssse3)
#undef MMABS
#endif
#undef HSUM
#undef DCT_SAD

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;
}

#define PHADDD(a, t)\
    "movq "#a", "#t"                  \n\t"\
    "psrlq $32, "#a"                  \n\t"\
    "paddd "#t", "#a"                 \n\t"
/*
   pmulhw: dst[0-15]=(src[0-15]*dst[0-15])[16-31]
   pmulhrw: dst[0-15]=(src[0-15]*dst[0-15] + 0x8000)[16-31]
   pmulhrsw: dst[0-15]=(src[0-15]*dst[0-15] + 0x4000)[15-30]
 */
#define PMULHRW(x, y, s, o)\
    "pmulhw " #s ", "#x "            \n\t"\
    "pmulhw " #s ", "#y "            \n\t"\
    "paddw " #o ", "#x "             \n\t"\
    "paddw " #o ", "#y "             \n\t"\
    "psraw $1, "#x "                 \n\t"\
    "psraw $1, "#y "                 \n\t"
#define DEF(x) x ## _mmx
#define SET_RND MOVQ_WONE
#define SCALE_OFFSET 1

#include "dsputil_qns_template.c"

#undef DEF
#undef SET_RND
#undef SCALE_OFFSET
#undef PMULHRW

#define DEF(x) x ## _3dnow
#define SET_RND(x)
#define SCALE_OFFSET 0
#define PMULHRW(x, y, s, o)\
    "pmulhrw " #s ", "#x "           \n\t"\
    "pmulhrw " #s ", "#y "           \n\t"

#include "dsputil_qns_template.c"

#undef DEF
#undef SET_RND
#undef SCALE_OFFSET
#undef PMULHRW

#if HAVE_SSSE3_INLINE
#undef PHADDD
#define DEF(x) x ## _ssse3
#define SET_RND(x)
#define SCALE_OFFSET -1
#define PHADDD(a, t)\
    "pshufw $0x0E, "#a", "#t"         \n\t"\
    "paddd "#t", "#a"                 \n\t" /* faster than phaddd on core2 */
#define PMULHRW(x, y, s, o)\
    "pmulhrsw " #s ", "#x "          \n\t"\
    "pmulhrsw " #s ", "#y "          \n\t"

#include "dsputil_qns_template.c"

#undef DEF
#undef SET_RND
#undef SCALE_OFFSET
#undef PMULHRW
#undef PHADDD
#endif /* HAVE_SSSE3_INLINE */

#endif /* HAVE_INLINE_ASM */

int ff_sse16_sse2(void *v, uint8_t * pix1, uint8_t * pix2, int line_size, int h);

#define hadamard_func(cpu) \
int ff_hadamard8_diff_##cpu  (void *s, uint8_t *src1, uint8_t *src2, \
                              int stride, int h); \
int ff_hadamard8_diff16_##cpu(void *s, uint8_t *src1, uint8_t *src2, \
                              int stride, int h);

hadamard_func(mmx)
hadamard_func(mmxext)
hadamard_func(sse2)
hadamard_func(ssse3)

av_cold void ff_dsputilenc_init_mmx(DSPContext *c, AVCodecContext *avctx)
{
    int mm_flags = av_get_cpu_flags();
    int bit_depth = avctx->bits_per_raw_sample;

#if HAVE_YASM
    if (EXTERNAL_MMX(mm_flags)) {
        if (bit_depth <= 8)
            c->get_pixels = ff_get_pixels_mmx;
        c->diff_pixels = ff_diff_pixels_mmx;
        c->pix_sum = ff_pix_sum16_mmx;

        c->pix_norm1 = ff_pix_norm1_mmx;
    }
    if (EXTERNAL_SSE2(mm_flags))
        if (bit_depth <= 8)
            c->get_pixels = ff_get_pixels_sse2;
#endif /* HAVE_YASM */

#if HAVE_INLINE_ASM
    if (mm_flags & AV_CPU_FLAG_MMX) {
        const int dct_algo = avctx->dct_algo;
        if (avctx->bits_per_raw_sample <= 8 &&
            (dct_algo==FF_DCT_AUTO || dct_algo==FF_DCT_MMX)) {
            if(mm_flags & AV_CPU_FLAG_SSE2){
                c->fdct = ff_fdct_sse2;
            } else if (mm_flags & AV_CPU_FLAG_MMXEXT) {
                c->fdct = ff_fdct_mmxext;
            }else{
                c->fdct = ff_fdct_mmx;
            }
        }


        c->diff_bytes= diff_bytes_mmx;
        c->sum_abs_dctelem= sum_abs_dctelem_mmx;

        c->sse[0] = sse16_mmx;
        c->sse[1] = sse8_mmx;
        c->vsad[4]= vsad_intra16_mmx;

        c->nsse[0] = nsse16_mmx;
        c->nsse[1] = nsse8_mmx;
        if(!(avctx->flags & CODEC_FLAG_BITEXACT)){
            c->vsad[0] = vsad16_mmx;
        }

        if(!(avctx->flags & CODEC_FLAG_BITEXACT)){
            c->try_8x8basis= try_8x8basis_mmx;
        }
        c->add_8x8basis= add_8x8basis_mmx;

        c->ssd_int8_vs_int16 = ssd_int8_vs_int16_mmx;

        if (mm_flags & AV_CPU_FLAG_MMXEXT) {
            c->sum_abs_dctelem = sum_abs_dctelem_mmxext;
            c->vsad[4]         = vsad_intra16_mmxext;

            if(!(avctx->flags & CODEC_FLAG_BITEXACT)){
                c->vsad[0] = vsad16_mmxext;
            }

            c->sub_hfyu_median_prediction = sub_hfyu_median_prediction_mmxext;
        }

        if(mm_flags & AV_CPU_FLAG_SSE2){
            c->sum_abs_dctelem= sum_abs_dctelem_sse2;
        }

#if HAVE_SSSE3_INLINE
        if(mm_flags & AV_CPU_FLAG_SSSE3){
            if(!(avctx->flags & CODEC_FLAG_BITEXACT)){
                c->try_8x8basis= try_8x8basis_ssse3;
            }
            c->add_8x8basis= add_8x8basis_ssse3;
            c->sum_abs_dctelem= sum_abs_dctelem_ssse3;
        }
#endif

        if(mm_flags & AV_CPU_FLAG_3DNOW){
            if(!(avctx->flags & CODEC_FLAG_BITEXACT)){
                c->try_8x8basis= try_8x8basis_3dnow;
            }
            c->add_8x8basis= add_8x8basis_3dnow;
        }
    }
#endif /* HAVE_INLINE_ASM */

    if (EXTERNAL_MMX(mm_flags)) {
        c->hadamard8_diff[0] = ff_hadamard8_diff16_mmx;
        c->hadamard8_diff[1] = ff_hadamard8_diff_mmx;

        if (EXTERNAL_MMXEXT(mm_flags)) {
            c->hadamard8_diff[0] = ff_hadamard8_diff16_mmxext;
            c->hadamard8_diff[1] = ff_hadamard8_diff_mmxext;
        }

        if (EXTERNAL_SSE2(mm_flags)) {
            c->sse[0] = ff_sse16_sse2;

#if HAVE_ALIGNED_STACK
            c->hadamard8_diff[0] = ff_hadamard8_diff16_sse2;
            c->hadamard8_diff[1] = ff_hadamard8_diff_sse2;
#endif
        }

        if (EXTERNAL_SSSE3(mm_flags) && HAVE_ALIGNED_STACK) {
            c->hadamard8_diff[0] = ff_hadamard8_diff16_ssse3;
            c->hadamard8_diff[1] = ff_hadamard8_diff_ssse3;
        }
    }

    ff_dsputil_init_pix_mmx(c, avctx);
}