text: /*****************************************************************************
   * pixel.c: pixel metrics
   *****************************************************************************
   * Copyright (C) 2003-2019 x264 project
   *
   * Authors: Loren Merritt <lorenm@u.washington.edu>
   *          Laurent Aimar <fenrir@via.ecp.fr>
   *          Fiona Glaser <fiona@x264.com>
   *
   * This program is free software; you can redistribute it and/or modify
   * it under the terms of the GNU General Public License as published by
   * the Free Software Foundation; either version 2 of the License, or
   * (at your option) any later version.
   *
   * This program 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 General Public License for more details.
   *
   * You should have received a copy of the GNU General Public License
   * along with this program; if not, write to the Free Software
   * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02111, USA.
   *
   * This program is also available under a commercial proprietary license.
   * For more information, contact us at licensing@x264.com.
   *****************************************************************************/
  
  #include "common.h"
  
  #if HAVE_MMX
  #   include "x86/pixel.h"
  #   include "x86/predict.h"
  #endif
  #if ARCH_PPC
  #   include "ppc/pixel.h"
  #endif
  #if ARCH_ARM
  #   include "arm/pixel.h"
  #   include "arm/predict.h"
  #endif
  #if ARCH_AARCH64
  #   include "aarch64/pixel.h"
  #   include "aarch64/predict.h"
  #endif
  #if ARCH_MIPS
  #   include "mips/pixel.h"
  #endif
  
  
  /****************************************************************************
   * pixel_sad_WxH
   ****************************************************************************/
  #define PIXEL_SAD_C( name, lx, ly ) \
  static int name( pixel *pix1, intptr_t i_stride_pix1,  \
                   pixel *pix2, intptr_t i_stride_pix2 ) \
  {                                                   \
      int i_sum = 0;                                  \
      for( int y = 0; y < ly; y++ )                   \
      {                                               \
          for( int x = 0; x < lx; x++ )               \
          {                                           \
              i_sum += abs( pix1[x] - pix2[x] );      \
          }                                           \
          pix1 += i_stride_pix1;                      \
          pix2 += i_stride_pix2;                      \
      }                                               \
      return i_sum;                                   \
  }
  
  
  PIXEL_SAD_C( x264_pixel_sad_16x16, 16, 16 )
  PIXEL_SAD_C( x264_pixel_sad_16x8,  16,  8 )
  PIXEL_SAD_C( x264_pixel_sad_8x16,   8, 16 )
  PIXEL_SAD_C( x264_pixel_sad_8x8,    8,  8 )
  PIXEL_SAD_C( x264_pixel_sad_8x4,    8,  4 )
  PIXEL_SAD_C( x264_pixel_sad_4x16,   4, 16 )
  PIXEL_SAD_C( x264_pixel_sad_4x8,    4,  8 )
  PIXEL_SAD_C( x264_pixel_sad_4x4,    4,  4 )
  
  /****************************************************************************
   * pixel_ssd_WxH
   ****************************************************************************/
  #define PIXEL_SSD_C( name, lx, ly ) \
  static int name( pixel *pix1, intptr_t i_stride_pix1,  \
                   pixel *pix2, intptr_t i_stride_pix2 ) \
  {                                                   \
      int i_sum = 0;                                  \
      for( int y = 0; y < ly; y++ )                   \
      {                                               \
          for( int x = 0; x < lx; x++ )               \
          {                                           \
              int d = pix1[x] - pix2[x];              \
              i_sum += d*d;                           \
          }                                           \
          pix1 += i_stride_pix1;                      \
          pix2 += i_stride_pix2;                      \
      }                                               \
      return i_sum;                                   \
  }
  
  PIXEL_SSD_C( x264_pixel_ssd_16x16, 16, 16 )
  PIXEL_SSD_C( x264_pixel_ssd_16x8,  16,  8 )
  PIXEL_SSD_C( x264_pixel_ssd_8x16,   8, 16 )
  PIXEL_SSD_C( x264_pixel_ssd_8x8,    8,  8 )
  PIXEL_SSD_C( x264_pixel_ssd_8x4,    8,  4 )
  PIXEL_SSD_C( x264_pixel_ssd_4x16,   4, 16 )
  PIXEL_SSD_C( x264_pixel_ssd_4x8,    4,  8 )
  PIXEL_SSD_C( x264_pixel_ssd_4x4,    4,  4 )
  
  uint64_t x264_pixel_ssd_wxh( x264_pixel_function_t *pf, pixel *pix1, intptr_t i_pix1,
                               pixel *pix2, intptr_t i_pix2, int i_width, int i_height )
  {
      uint64_t i_ssd = 0;
      int y;
      int align = !(((intptr_t)pix1 | (intptr_t)pix2 | i_pix1 | i_pix2) & 15);
  
  #define SSD(size) i_ssd += pf->ssd[size]( pix1 + y*i_pix1 + x, i_pix1, \
                                            pix2 + y*i_pix2 + x, i_pix2 );
      for( y = 0; y < i_height-15; y += 16 )
      {
          int x = 0;
          if( align )
              for( ; x < i_width-15; x += 16 )
                  SSD(PIXEL_16x16);
          for( ; x < i_width-7; x += 8 )
              SSD(PIXEL_8x16);
      }
      if( y < i_height-7 )
          for( int x = 0; x < i_width-7; x += 8 )
              SSD(PIXEL_8x8);
  #undef SSD
  
  #define SSD1 { int d = pix1[y*i_pix1+x] - pix2[y*i_pix2+x]; i_ssd += d*d; }
      if( i_width & 7 )
      {
          for( y = 0; y < (i_height & ~7); y++ )
              for( int x = i_width & ~7; x < i_width; x++ )
                  SSD1;
      }
      if( i_height & 7 )
      {
          for( y = i_height & ~7; y < i_height; y++ )
              for( int x = 0; x < i_width; x++ )
                  SSD1;
      }
  #undef SSD1
  
      return i_ssd;
  }
  
  static void pixel_ssd_nv12_core( pixel *pixuv1, intptr_t stride1, pixel *pixuv2, intptr_t stride2,
                                   int width, int height, uint64_t *ssd_u, uint64_t *ssd_v )
  {
      *ssd_u = 0, *ssd_v = 0;
      for( int y = 0; y < height; y++, pixuv1+=stride1, pixuv2+=stride2 )
          for( int x = 0; x < width; x++ )
          {
              int du = pixuv1[2*x]   - pixuv2[2*x];
              int dv = pixuv1[2*x+1] - pixuv2[2*x+1];
              *ssd_u += du*du;
              *ssd_v += dv*dv;
          }
  }
  
  void x264_pixel_ssd_nv12( x264_pixel_function_t *pf, pixel *pix1, intptr_t i_pix1, pixel *pix2, intptr_t i_pix2,
                            int i_width, int i_height, uint64_t *ssd_u, uint64_t *ssd_v )
  {
      pf->ssd_nv12_core( pix1, i_pix1, pix2, i_pix2, i_width&~7, i_height, ssd_u, ssd_v );
      if( i_width&7 )
      {
          uint64_t tmp[2];
          pixel_ssd_nv12_core( pix1+(i_width&~7), i_pix1, pix2+(i_width&~7), i_pix2, i_width&7, i_height, &tmp[0], &tmp[1] );
          *ssd_u += tmp[0];
          *ssd_v += tmp[1];
      }
  }
  
  /****************************************************************************
   * pixel_var_wxh
   ****************************************************************************/
  #define PIXEL_VAR_C( name, w, h ) \
  static uint64_t name( pixel *pix, intptr_t i_stride ) \
  {                                             \
      uint32_t sum = 0, sqr = 0;                \
      for( int y = 0; y < h; y++ )              \
      {                                         \
          for( int x = 0; x < w; x++ )          \
          {                                     \
              sum += pix[x];                    \
              sqr += pix[x] * pix[x];           \
          }                                     \
          pix += i_stride;                      \
      }                                         \
      return sum + ((uint64_t)sqr << 32);       \
  }
  
  PIXEL_VAR_C( pixel_var_16x16, 16, 16 )
  PIXEL_VAR_C( pixel_var_8x16,   8, 16 )
  PIXEL_VAR_C( pixel_var_8x8,    8,  8 )
  
  /****************************************************************************
   * pixel_var2_wxh
   ****************************************************************************/
  #define PIXEL_VAR2_C( name, h, shift ) \
  static int name( pixel *fenc, pixel *fdec, int ssd[2] ) \
  { \
      int sum_u = 0, sum_v = 0, sqr_u = 0, sqr_v = 0; \
      for( int y = 0; y < h; y++ ) \
      { \
          for( int x = 0; x < 8; x++ ) \
          { \
              int diff_u = fenc[x] - fdec[x]; \
              int diff_v = fenc[x+FENC_STRIDE/2] - fdec[x+FDEC_STRIDE/2]; \
              sum_u += diff_u; \
              sum_v += diff_v; \
              sqr_u += diff_u * diff_u; \
              sqr_v += diff_v * diff_v; \
          } \
          fenc += FENC_STRIDE; \
          fdec += FDEC_STRIDE; \
      } \
      ssd[0] = sqr_u; \
      ssd[1] = sqr_v; \
      return sqr_u - ((int64_t)sum_u * sum_u >> shift) + \
             sqr_v - ((int64_t)sum_v * sum_v >> shift); \
  }
  
  PIXEL_VAR2_C( pixel_var2_8x16, 16, 7 )
  PIXEL_VAR2_C( pixel_var2_8x8,   8, 6 )
  
  #if BIT_DEPTH > 8
      typedef uint32_t sum_t;
      typedef uint64_t sum2_t;
  #else
      typedef uint16_t sum_t;
      typedef uint32_t sum2_t;
  #endif
  #define BITS_PER_SUM (8 * sizeof(sum_t))
  
  #define HADAMARD4(d0, d1, d2, d3, s0, s1, s2, s3) {\
      sum2_t t0 = s0 + s1;\
      sum2_t t1 = s0 - s1;\
      sum2_t t2 = s2 + s3;\
      sum2_t t3 = s2 - s3;\
      d0 = t0 + t2;\
      d2 = t0 - t2;\
      d1 = t1 + t3;\
      d3 = t1 - t3;\
  }
  
  // in: a pseudo-simd number of the form x+(y<<16)
  // return: abs(x)+(abs(y)<<16)
  static ALWAYS_INLINE sum2_t abs2( sum2_t a )
  {
      sum2_t s = ((a>>(BITS_PER_SUM-1))&(((sum2_t)1<<BITS_PER_SUM)+1))*((sum_t)-1);
      return (a+s)^s;
  }
  
  /****************************************************************************
   * pixel_satd_WxH: sum of 4x4 Hadamard transformed differences
   ****************************************************************************/
  
  static NOINLINE int x264_pixel_satd_4x4( pixel *pix1, intptr_t i_pix1, pixel *pix2, intptr_t i_pix2 )
  {
      sum2_t tmp[4][2];
      sum2_t a0, a1, a2, a3, b0, b1;
      sum2_t sum = 0;
      for( int i = 0; i < 4; i++, pix1 += i_pix1, pix2 += i_pix2 )
      {
          a0 = pix1[0] - pix2[0];
          a1 = pix1[1] - pix2[1];
          b0 = (a0+a1) + ((a0-a1)<<BITS_PER_SUM);
          a2 = pix1[2] - pix2[2];
          a3 = pix1[3] - pix2[3];
          b1 = (a2+a3) + ((a2-a3)<<BITS_PER_SUM);
          tmp[i][0] = b0 + b1;
          tmp[i][1] = b0 - b1;
      }
      for( int i = 0; i < 2; i++ )
      {
          HADAMARD4( a0, a1, a2, a3, tmp[0][i], tmp[1][i], tmp[2][i], tmp[3][i] );
          a0 = abs2(a0) + abs2(a1) + abs2(a2) + abs2(a3);
          sum += ((sum_t)a0) + (a0>>BITS_PER_SUM);
      }
      return sum >> 1;
  }
  
  static NOINLINE int x264_pixel_satd_8x4( pixel *pix1, intptr_t i_pix1, pixel *pix2, intptr_t i_pix2 )
  {
      sum2_t tmp[4][4];
      sum2_t a0, a1, a2, a3;
      sum2_t sum = 0;
      for( int i = 0; i < 4; i++, pix1 += i_pix1, pix2 += i_pix2 )
      {
          a0 = (pix1[0] - pix2[0]) + ((sum2_t)(pix1[4] - pix2[4]) << BITS_PER_SUM);
          a1 = (pix1[1] - pix2[1]) + ((sum2_t)(pix1[5] - pix2[5]) << BITS_PER_SUM);
          a2 = (pix1[2] - pix2[2]) + ((sum2_t)(pix1[6] - pix2[6]) << BITS_PER_SUM);
          a3 = (pix1[3] - pix2[3]) + ((sum2_t)(pix1[7] - pix2[7]) << BITS_PER_SUM);
          HADAMARD4( tmp[i][0], tmp[i][1], tmp[i][2], tmp[i][3], a0,a1,a2,a3 );
      }
      for( int i = 0; i < 4; i++ )
      {
          HADAMARD4( a0, a1, a2, a3, tmp[0][i], tmp[1][i], tmp[2][i], tmp[3][i] );
          sum += abs2(a0) + abs2(a1) + abs2(a2) + abs2(a3);
      }
      return (((sum_t)sum) + (sum>>BITS_PER_SUM)) >> 1;
  }
  
  #define PIXEL_SATD_C( w, h, sub )\
  static int x264_pixel_satd_##w##x##h( pixel *pix1, intptr_t i_pix1, pixel *pix2, intptr_t i_pix2 )\
  {\
      int sum = sub( pix1, i_pix1, pix2, i_pix2 )\
              + sub( pix1+4*i_pix1, i_pix1, pix2+4*i_pix2, i_pix2 );\
      if( w==16 )\
          sum+= sub( pix1+8, i_pix1, pix2+8, i_pix2 )\
              + sub( pix1+8+4*i_pix1, i_pix1, pix2+8+4*i_pix2, i_pix2 );\
      if( h==16 )\
          sum+= sub( pix1+8*i_pix1, i_pix1, pix2+8*i_pix2, i_pix2 )\
              + sub( pix1+12*i_pix1, i_pix1, pix2+12*i_pix2, i_pix2 );\
      if( w==16 && h==16 )\
          sum+= sub( pix1+8+8*i_pix1, i_pix1, pix2+8+8*i_pix2, i_pix2 )\
              + sub( pix1+8+12*i_pix1, i_pix1, pix2+8+12*i_pix2, i_pix2 );\
      return sum;\
  }
  PIXEL_SATD_C( 16, 16, x264_pixel_satd_8x4 )
  PIXEL_SATD_C( 16, 8,  x264_pixel_satd_8x4 )
  PIXEL_SATD_C( 8,  16, x264_pixel_satd_8x4 )
  PIXEL_SATD_C( 8,  8,  x264_pixel_satd_8x4 )
  PIXEL_SATD_C( 4,  16, x264_pixel_satd_4x4 )
  PIXEL_SATD_C( 4,  8,  x264_pixel_satd_4x4 )
  
  static NOINLINE int sa8d_8x8( pixel *pix1, intptr_t i_pix1, pixel *pix2, intptr_t i_pix2 )
  {
      sum2_t tmp[8][4];
      sum2_t a0, a1, a2, a3, a4, a5, a6, a7, b0, b1, b2, b3;
      sum2_t sum = 0;
      for( int i = 0; i < 8; i++, pix1 += i_pix1, pix2 += i_pix2 )
      {
          a0 = pix1[0] - pix2[0];
          a1 = pix1[1] - pix2[1];
          b0 = (a0+a1) + ((a0-a1)<<BITS_PER_SUM);
          a2 = pix1[2] - pix2[2];
          a3 = pix1[3] - pix2[3];
          b1 = (a2+a3) + ((a2-a3)<<BITS_PER_SUM);
          a4 = pix1[4] - pix2[4];
          a5 = pix1[5] - pix2[5];
          b2 = (a4+a5) + ((a4-a5)<<BITS_PER_SUM);
          a6 = pix1[6] - pix2[6];
          a7 = pix1[7] - pix2[7];
          b3 = (a6+a7) + ((a6-a7)<<BITS_PER_SUM);
          HADAMARD4( tmp[i][0], tmp[i][1], tmp[i][2], tmp[i][3], b0,b1,b2,b3 );
      }
      for( int i = 0; i < 4; i++ )
      {
          HADAMARD4( a0, a1, a2, a3, tmp[0][i], tmp[1][i], tmp[2][i], tmp[3][i] );
          HADAMARD4( a4, a5, a6, a7, tmp[4][i], tmp[5][i], tmp[6][i], tmp[7][i] );
          b0  = abs2(a0+a4) + abs2(a0-a4);
          b0 += abs2(a1+a5) + abs2(a1-a5);
          b0 += abs2(a2+a6) + abs2(a2-a6);
          b0 += abs2(a3+a7) + abs2(a3-a7);
          sum += (sum_t)b0 + (b0>>BITS_PER_SUM);
      }
      return sum;
  }
  
  static int x264_pixel_sa8d_8x8( pixel *pix1, intptr_t i_pix1, pixel *pix2, intptr_t i_pix2 )
  {
      int sum = sa8d_8x8( pix1, i_pix1, pix2, i_pix2 );
      return (sum+2)>>2;
  }
  
  static int x264_pixel_sa8d_16x16( pixel *pix1, intptr_t i_pix1, pixel *pix2, intptr_t i_pix2 )
  {
      int sum = sa8d_8x8( pix1, i_pix1, pix2, i_pix2 )
              + sa8d_8x8( pix1+8, i_pix1, pix2+8, i_pix2 )
              + sa8d_8x8( pix1+8*i_pix1, i_pix1, pix2+8*i_pix2, i_pix2 )
              + sa8d_8x8( pix1+8+8*i_pix1, i_pix1, pix2+8+8*i_pix2, i_pix2 );
      return (sum+2)>>2;
  }
  
  static NOINLINE uint64_t pixel_hadamard_ac( pixel *pix, intptr_t stride )
  {
      sum2_t tmp[32];
      sum2_t a0, a1, a2, a3, dc;
      sum2_t sum4 = 0, sum8 = 0;
      for( int i = 0; i < 8; i++, pix+=stride )
      {
          sum2_t *t = tmp + (i&3) + (i&4)*4;
          a0 = (pix[0]+pix[1]) + ((sum2_t)(pix[0]-pix[1])<<BITS_PER_SUM);
          a1 = (pix[2]+pix[3]) + ((sum2_t)(pix[2]-pix[3])<<BITS_PER_SUM);
          t[0] = a0 + a1;
          t[4] = a0 - a1;
          a2 = (pix[4]+pix[5]) + ((sum2_t)(pix[4]-pix[5])<<BITS_PER_SUM);
          a3 = (pix[6]+pix[7]) + ((sum2_t)(pix[6]-pix[7])<<BITS_PER_SUM);
          t[8] = a2 + a3;
          t[12] = a2 - a3;
      }
      for( int i = 0; i < 8; i++ )
      {
          HADAMARD4( a0, a1, a2, a3, tmp[i*4+0], tmp[i*4+1], tmp[i*4+2], tmp[i*4+3] );
          tmp[i*4+0] = a0;
          tmp[i*4+1] = a1;
          tmp[i*4+2] = a2;
          tmp[i*4+3] = a3;
          sum4 += abs2(a0) + abs2(a1) + abs2(a2) + abs2(a3);
      }
      for( int i = 0; i < 8; i++ )
      {
          HADAMARD4( a0,a1,a2,a3, tmp[i], tmp[8+i], tmp[16+i], tmp[24+i] );
          sum8 += abs2(a0) + abs2(a1) + abs2(a2) + abs2(a3);
      }
      dc = (sum_t)(tmp[0] + tmp[8] + tmp[16] + tmp[24]);
      sum4 = (sum_t)sum4 + (sum4>>BITS_PER_SUM) - dc;
      sum8 = (sum_t)sum8 + (sum8>>BITS_PER_SUM) - dc;
      return ((uint64_t)sum8<<32) + sum4;
  }
  
  #define HADAMARD_AC(w,h) \
  static uint64_t x264_pixel_hadamard_ac_##w##x##h( pixel *pix, intptr_t stride )\
  {\
      uint64_t sum = pixel_hadamard_ac( pix, stride );\
      if( w==16 )\
          sum += pixel_hadamard_ac( pix+8, stride );\
      if( h==16 )\
          sum += pixel_hadamard_ac( pix+8*stride, stride );\
      if( w==16 && h==16 )\
          sum += pixel_hadamard_ac( pix+8*stride+8, stride );\
      return ((sum>>34)<<32) + ((uint32_t)sum>>1);\
  }
  HADAMARD_AC( 16, 16 )
  HADAMARD_AC( 16, 8 )
  HADAMARD_AC( 8, 16 )
  HADAMARD_AC( 8, 8 )
  
  
  /****************************************************************************
   * pixel_sad_x4
   ****************************************************************************/
  #define SAD_X( size ) \
  static void x264_pixel_sad_x3_##size( pixel *fenc, pixel *pix0, pixel *pix1, pixel *pix2,\
                                        intptr_t i_stride, int scores[3] )\
  {\
      scores[0] = x264_pixel_sad_##size( fenc, FENC_STRIDE, pix0, i_stride );\
      scores[1] = x264_pixel_sad_##size( fenc, FENC_STRIDE, pix1, i_stride );\
      scores[2] = x264_pixel_sad_##size( fenc, FENC_STRIDE, pix2, i_stride );\
  }\
  static void x264_pixel_sad_x4_##size( pixel *fenc, pixel *pix0, pixel *pix1,pixel *pix2, pixel *pix3,\
                                        intptr_t i_stride, int scores[4] )\
  {\
      scores[0] = x264_pixel_sad_##size( fenc, FENC_STRIDE, pix0, i_stride );\
      scores[1] = x264_pixel_sad_##size( fenc, FENC_STRIDE, pix1, i_stride );\
      scores[2] = x264_pixel_sad_##size( fenc, FENC_STRIDE, pix2, i_stride );\
      scores[3] = x264_pixel_sad_##size( fenc, FENC_STRIDE, pix3, i_stride );\
  }
  
  SAD_X( 16x16 )
  SAD_X( 16x8 )
  SAD_X( 8x16 )
  SAD_X( 8x8 )
  SAD_X( 8x4 )
  SAD_X( 4x8 )
  SAD_X( 4x4 )
  
  /****************************************************************************
   * pixel_satd_x4
   * no faster than single satd, but needed for satd to be a drop-in replacement for sad
   ****************************************************************************/
  
  #define SATD_X( size, cpu ) \
  static void x264_pixel_satd_x3_##size##cpu( pixel *fenc, pixel *pix0, pixel *pix1, pixel *pix2,\
                                              intptr_t i_stride, int scores[3] )\
  {\
      scores[0] = x264_pixel_satd_##size##cpu( fenc, FENC_STRIDE, pix0, i_stride );\
      scores[1] = x264_pixel_satd_##size##cpu( fenc, FENC_STRIDE, pix1, i_stride );\
      scores[2] = x264_pixel_satd_##size##cpu( fenc, FENC_STRIDE, pix2, i_stride );\
  }\
  static void x264_pixel_satd_x4_##size##cpu( pixel *fenc, pixel *pix0, pixel *pix1, pixel *pix2, pixel *pix3,\
                                              intptr_t i_stride, int scores[4] )\
  {\
      scores[0] = x264_pixel_satd_##size##cpu( fenc, FENC_STRIDE, pix0, i_stride );\
      scores[1] = x264_pixel_satd_##size##cpu( fenc, FENC_STRIDE, pix1, i_stride );\
      scores[2] = x264_pixel_satd_##size##cpu( fenc, FENC_STRIDE, pix2, i_stride );\
      scores[3] = x264_pixel_satd_##size##cpu( fenc, FENC_STRIDE, pix3, i_stride );\
  }
  #define SATD_X_DECL6( cpu )\
  SATD_X( 16x16, cpu )\
  SATD_X( 16x8, cpu )\
  SATD_X( 8x16, cpu )\
  SATD_X( 8x8, cpu )\
  SATD_X( 8x4, cpu )\
  SATD_X( 4x8, cpu )
  #define SATD_X_DECL7( cpu )\
  SATD_X_DECL6( cpu )\
  SATD_X( 4x4, cpu )
  
  SATD_X_DECL7()
  #if HAVE_MMX
  SATD_X_DECL7( _mmx2 )
  #if !HIGH_BIT_DEPTH
  SATD_X_DECL6( _sse2 )
  SATD_X_DECL7( _ssse3 )
  SATD_X_DECL6( _ssse3_atom )
  SATD_X_DECL7( _sse4 )
  SATD_X_DECL7( _avx )
  SATD_X_DECL7( _xop )
  SATD_X_DECL7( _avx512 )
  #endif // !HIGH_BIT_DEPTH
  #endif
  
  #if !HIGH_BIT_DEPTH
  #if HAVE_ARMV6 || ARCH_AARCH64
  SATD_X_DECL7( _neon )
  #endif
  #endif // !HIGH_BIT_DEPTH
  
  #define INTRA_MBCMP_8x8( mbcmp, cpu, cpu2 )\
  static void intra_##mbcmp##_x3_8x8##cpu( pixel *fenc, pixel edge[36], int res[3] )\
  {\
      ALIGNED_ARRAY_16( pixel, pix, [8*FDEC_STRIDE] );\
      x264_predict_8x8_v##cpu2( pix, edge );\
      res[0] = x264_pixel_##mbcmp##_8x8##cpu( pix, FDEC_STRIDE, fenc, FENC_STRIDE );\
      x264_predict_8x8_h##cpu2( pix, edge );\
      res[1] = x264_pixel_##mbcmp##_8x8##cpu( pix, FDEC_STRIDE, fenc, FENC_STRIDE );\
      x264_predict_8x8_dc##cpu2( pix, edge );\
      res[2] = x264_pixel_##mbcmp##_8x8##cpu( pix, FDEC_STRIDE, fenc, FENC_STRIDE );\
  }
  
  INTRA_MBCMP_8x8( sad,, _c )
  INTRA_MBCMP_8x8(sa8d,, _c )
  #if HIGH_BIT_DEPTH && HAVE_MMX
  #define x264_predict_8x8_v_sse2 x264_predict_8x8_v_sse
  INTRA_MBCMP_8x8( sad, _mmx2,  _c )
  INTRA_MBCMP_8x8(sa8d, _sse2,  _sse2 )
  #endif
  #if !HIGH_BIT_DEPTH && (HAVE_ARMV6 || ARCH_AARCH64)
  INTRA_MBCMP_8x8( sad, _neon, _neon )
  INTRA_MBCMP_8x8(sa8d, _neon, _neon )
  #endif
  
  #define INTRA_MBCMP( mbcmp, size, pred1, pred2, pred3, chroma, cpu, cpu2 )\
  static void intra_##mbcmp##_x3_##size##chroma##cpu( pixel *fenc, pixel *fdec, int res[3] )\
  {\
      x264_predict_##size##chroma##_##pred1##cpu2( fdec );\
      res[0] = x264_pixel_##mbcmp##_##size##cpu( fdec, FDEC_STRIDE, fenc, FENC_STRIDE );\
      x264_predict_##size##chroma##_##pred2##cpu2( fdec );\
      res[1] = x264_pixel_##mbcmp##_##size##cpu( fdec, FDEC_STRIDE, fenc, FENC_STRIDE );\
      x264_predict_##size##chroma##_##pred3##cpu2( fdec );\
      res[2] = x264_pixel_##mbcmp##_##size##cpu( fdec, FDEC_STRIDE, fenc, FENC_STRIDE );\
  }
  
  INTRA_MBCMP( sad,  4x4,   v, h, dc,  ,, _c )
  INTRA_MBCMP(satd,  4x4,   v, h, dc,  ,, _c )
  INTRA_MBCMP( sad,  8x8,  dc, h,  v, c,, _c )
  INTRA_MBCMP(satd,  8x8,  dc, h,  v, c,, _c )
  INTRA_MBCMP( sad,  8x16, dc, h,  v, c,, _c )
  INTRA_MBCMP(satd,  8x16, dc, h,  v, c,, _c )
  INTRA_MBCMP( sad, 16x16,  v, h, dc,  ,, _c )
  INTRA_MBCMP(satd, 16x16,  v, h, dc,  ,, _c )
  
  #if HAVE_MMX
  #if HIGH_BIT_DEPTH
  #define x264_predict_8x8c_v_mmx2 x264_predict_8x8c_v_mmx
  #define x264_predict_8x16c_v_mmx2 x264_predict_8x16c_v_c
  #define x264_predict_16x16_dc_mmx2 x264_predict_16x16_dc_c
  #define x264_predict_8x8c_v_sse2 x264_predict_8x8c_v_sse
  #define x264_predict_8x16c_v_sse2 x264_predict_8x16c_v_sse
  #define x264_predict_16x16_v_sse2 x264_predict_16x16_v_sse
  INTRA_MBCMP( sad,  4x4,   v, h, dc,  , _mmx2, _c )
  INTRA_MBCMP( sad,  8x8,  dc, h,  v, c, _mmx2, _mmx2 )
  INTRA_MBCMP( sad,  8x16, dc, h,  v, c, _mmx2, _mmx2 )
  INTRA_MBCMP(satd,  8x16, dc, h,  v, c, _mmx2, _mmx2 )
  INTRA_MBCMP( sad, 16x16,  v, h, dc,  , _mmx2, _mmx2 )
  INTRA_MBCMP( sad,  8x8,  dc, h,  v, c, _sse2, _sse2 )
  INTRA_MBCMP( sad,  8x16, dc, h,  v, c, _sse2, _sse2 )
  INTRA_MBCMP(satd,  8x16, dc, h,  v, c, _sse2, _sse2 )
  INTRA_MBCMP( sad, 16x16,  v, h, dc,  , _sse2, _sse2 )
  INTRA_MBCMP( sad,  8x8,  dc, h,  v, c, _ssse3, _sse2 )
  INTRA_MBCMP( sad,  8x16, dc, h,  v, c, _ssse3, _sse2 )
  INTRA_MBCMP(satd,  8x16, dc, h,  v, c, _ssse3, _sse2 )
  INTRA_MBCMP( sad, 16x16,  v, h, dc,  , _ssse3, _sse2 )
  INTRA_MBCMP(satd,  8x16, dc, h,  v, c, _sse4, _sse2 )
  INTRA_MBCMP(satd,  8x16, dc, h,  v, c, _avx, _sse2 )
  #else
  #define x264_predict_8x16c_v_mmx2 x264_predict_8x16c_v_mmx
  INTRA_MBCMP( sad,  8x16, dc, h,  v, c, _mmx2, _mmx2 )
  INTRA_MBCMP(satd,  8x16, dc, h,  v, c, _mmx2, _mmx2 )
  INTRA_MBCMP( sad,  8x16, dc, h,  v, c, _sse2, _mmx2 )
  INTRA_MBCMP(satd,  8x16, dc, h,  v, c, _sse2, _mmx2 )
  INTRA_MBCMP(satd,  8x16, dc, h,  v, c, _ssse3, _mmx2 )
  INTRA_MBCMP(satd,  8x16, dc, h,  v, c, _sse4, _mmx2 )
  INTRA_MBCMP(satd,  8x16, dc, h,  v, c, _avx, _mmx2 )
  INTRA_MBCMP(satd,  8x16, dc, h,  v, c, _xop, _mmx2 )
  #endif
  #endif
  #if !HIGH_BIT_DEPTH && HAVE_ARMV6
  INTRA_MBCMP( sad,  4x4,   v, h, dc,  , _neon, _armv6 )
  INTRA_MBCMP(satd,  4x4,   v, h, dc,  , _neon, _armv6 )
  INTRA_MBCMP( sad,  8x8,  dc, h,  v, c, _neon, _neon )
  INTRA_MBCMP(satd,  8x8,  dc, h,  v, c, _neon, _neon )
  INTRA_MBCMP( sad,  8x16, dc, h,  v, c, _neon, _c )
  INTRA_MBCMP(satd,  8x16, dc, h,  v, c, _neon, _c )
  INTRA_MBCMP( sad, 16x16,  v, h, dc,  , _neon, _neon )
  INTRA_MBCMP(satd, 16x16,  v, h, dc,  , _neon, _neon )
  #endif
  #if !HIGH_BIT_DEPTH && ARCH_AARCH64
  INTRA_MBCMP( sad,  4x4,   v, h, dc,  , _neon, _neon )
  INTRA_MBCMP(satd,  4x4,   v, h, dc,  , _neon, _neon )
  INTRA_MBCMP( sad,  8x8,  dc, h,  v, c, _neon, _neon )
  INTRA_MBCMP(satd,  8x8,  dc, h,  v, c, _neon, _neon )
  INTRA_MBCMP( sad,  8x16, dc, h,  v, c, _neon, _neon )
  INTRA_MBCMP(satd,  8x16, dc, h,  v, c, _neon, _neon )
  INTRA_MBCMP( sad, 16x16,  v, h, dc,  , _neon, _neon )
  INTRA_MBCMP(satd, 16x16,  v, h, dc,  , _neon, _neon )
  #endif
  
  // No C implementation of intra_satd_x9. See checkasm for its behavior,
  // or see mb_analyse_intra for the entirely different algorithm we
  // use when lacking an asm implementation of it.
  
  
  
  /****************************************************************************
   * structural similarity metric
   ****************************************************************************/
  static void ssim_4x4x2_core( const pixel *pix1, intptr_t stride1,
                               const pixel *pix2, intptr_t stride2,
                               int sums[2][4] )
  {
      for( int z = 0; z < 2; z++ )
      {
          uint32_t s1 = 0, s2 = 0, ss = 0, s12 = 0;
          for( int y = 0; y < 4; y++ )
              for( int x = 0; x < 4; x++ )
              {
                  int a = pix1[x+y*stride1];
                  int b = pix2[x+y*stride2];
                  s1  += a;
                  s2  += b;
                  ss  += a*a;
                  ss  += b*b;
                  s12 += a*b;
              }
          sums[z][0] = s1;
          sums[z][1] = s2;
          sums[z][2] = ss;
          sums[z][3] = s12;
          pix1 += 4;
          pix2 += 4;
      }
  }
  
  static float ssim_end1( int s1, int s2, int ss, int s12 )
  {
  /* Maximum value for 10-bit is: ss*64 = (2^10-1)^2*16*4*64 = 4286582784, which will overflow in some cases.
   * s1*s1, s2*s2, and s1*s2 also obtain this value for edge cases: ((2^10-1)*16*4)^2 = 4286582784.
   * Maximum value for 9-bit is: ss*64 = (2^9-1)^2*16*4*64 = 1069551616, which will not overflow. */
  #if BIT_DEPTH > 9
  #define type float
      static const float ssim_c1 = .01*.01*PIXEL_MAX*PIXEL_MAX*64;
      static const float ssim_c2 = .03*.03*PIXEL_MAX*PIXEL_MAX*64*63;
  #else
  #define type int
      static const int ssim_c1 = (int)(.01*.01*PIXEL_MAX*PIXEL_MAX*64 + .5);
      static const int ssim_c2 = (int)(.03*.03*PIXEL_MAX*PIXEL_MAX*64*63 + .5);
  #endif
      type fs1 = s1;
      type fs2 = s2;
      type fss = ss;
      type fs12 = s12;
      type vars = fss*64 - fs1*fs1 - fs2*fs2;
      type covar = fs12*64 - fs1*fs2;
      return (float)(2*fs1*fs2 + ssim_c1) * (float)(2*covar + ssim_c2)
           / ((float)(fs1*fs1 + fs2*fs2 + ssim_c1) * (float)(vars + ssim_c2));
  #undef type
  }
  
  static float ssim_end4( int sum0[5][4], int sum1[5][4], int width )
  {
      float ssim = 0.0;
      for( int i = 0; i < width; i++ )
          ssim += ssim_end1( sum0[i][0] + sum0[i+1][0] + sum1[i][0] + sum1[i+1][0],
                             sum0[i][1] + sum0[i+1][1] + sum1[i][1] + sum1[i+1][1],
                             sum0[i][2] + sum0[i+1][2] + sum1[i][2] + sum1[i+1][2],
                             sum0[i][3] + sum0[i+1][3] + sum1[i][3] + sum1[i+1][3] );
      return ssim;
  }
  
  float x264_pixel_ssim_wxh( x264_pixel_function_t *pf,
                             pixel *pix1, intptr_t stride1,
                             pixel *pix2, intptr_t stride2,
                             int width, int height, void *buf, int *cnt )
  {
      int z = 0;
      float ssim = 0.0;
      int (*sum0)[4] = buf;
      int (*sum1)[4] = sum0 + (width >> 2) + 3;
      width >>= 2;
      height >>= 2;
      for( int y = 1; y < height; y++ )
      {
          for( ; z <= y; z++ )
          {
              XCHG( void*, sum0, sum1 );
              for( int x = 0; x < width; x+=2 )
                  pf->ssim_4x4x2_core( &pix1[4*(x+z*stride1)], stride1, &pix2[4*(x+z*stride2)], stride2, &sum0[x] );
          }
          for( int x = 0; x < width-1; x += 4 )
              ssim += pf->ssim_end4( sum0+x, sum1+x, X264_MIN(4,width-x-1) );
      }
      *cnt = (height-1) * (width-1);
      return ssim;
  }
  
  static int pixel_vsad( pixel *src, intptr_t stride, int height )
  {
      int score = 0;
      for( int i = 1; i < height; i++, src += stride )
          for( int j = 0; j < 16; j++ )
              score += abs(src[j] - src[j+stride]);
      return score;
  }
  
  int x264_field_vsad( x264_t *h, int mb_x, int mb_y )
  {
      int score_field, score_frame;
      int stride = h->fenc->i_stride[0];
      int mb_stride = h->mb.i_mb_stride;
      pixel *fenc = h->fenc->plane[0] + 16 * (mb_x + mb_y * stride);
      int mb_xy = mb_x + mb_y*mb_stride;
  
      /* We don't want to analyze pixels outside the frame, as it gives inaccurate results. */
      int mbpair_height = X264_MIN( h->param.i_height - mb_y * 16, 32 );
      score_frame  = h->pixf.vsad( fenc,          stride, mbpair_height );
      score_field  = h->pixf.vsad( fenc,        stride*2, mbpair_height >> 1 );
      score_field += h->pixf.vsad( fenc+stride, stride*2, mbpair_height >> 1 );
  
      if( mb_x > 0 )
          score_field += 512 - h->mb.field[mb_xy        -1]*1024;
      if( mb_y > 0 )
          score_field += 512 - h->mb.field[mb_xy-mb_stride]*1024;
  
      return (score_field < score_frame);
  }
  
  static int pixel_asd8( pixel *pix1, intptr_t stride1, pixel *pix2, intptr_t stride2, int height )
  {
      int sum = 0;
      for( int y = 0; y < height; y++, pix1 += stride1, pix2 += stride2 )
          for( int x = 0; x < 8; x++ )
              sum += pix1[x] - pix2[x];
      return abs( sum );
  }
  
  /****************************************************************************
   * successive elimination
   ****************************************************************************/
  static int x264_pixel_ads4( int enc_dc[4], uint16_t *sums, int delta,
                              uint16_t *cost_mvx, int16_t *mvs, int width, int thresh )
  {
      int nmv = 0;
      for( int i = 0; i < width; i++, sums++ )
      {
          int ads = abs( enc_dc[0] - sums[0] )
                  + abs( enc_dc[1] - sums[8] )
                  + abs( enc_dc[2] - sums[delta] )
                  + abs( enc_dc[3] - sums[delta+8] )
                  + cost_mvx[i];
          if( ads < thresh )
              mvs[nmv++] = i;
      }
      return nmv;
  }
  
  static int x264_pixel_ads2( int enc_dc[2], uint16_t *sums, int delta,
                              uint16_t *cost_mvx, int16_t *mvs, int width, int thresh )
  {
      int nmv = 0;
      for( int i = 0; i < width; i++, sums++ )
      {
          int ads = abs( enc_dc[0] - sums[0] )
                  + abs( enc_dc[1] - sums[delta] )
                  + cost_mvx[i];
          if( ads < thresh )
              mvs[nmv++] = i;
      }
      return nmv;
  }
  
  static int x264_pixel_ads1( int enc_dc[1], uint16_t *sums, int delta,
                              uint16_t *cost_mvx, int16_t *mvs, int width, int thresh )
  {
      int nmv = 0;
      for( int i = 0; i<width; i++, sums++ )
      {
          int ads = abs( enc_dc[0] - sums[0] )
                  + cost_mvx[i];
          if( ads < thresh )
              mvs[nmv++] = i;
      }
      return nmv;
  }
  
  
  /****************************************************************************
   * x264_pixel_init:
   ****************************************************************************/
  void x264_pixel_init( int cpu, x264_pixel_function_t *pixf )
  {
      memset( pixf, 0, sizeof(*pixf) );
  
  #define INIT2_NAME( name1, name2, cpu ) \
      pixf->name1[PIXEL_16x16] = x264_pixel_##name2##_16x16##cpu;\
      pixf->name1[PIXEL_16x8]  = x264_pixel_##name2##_16x8##cpu;
  #define INIT4_NAME( name1, name2, cpu ) \
      INIT2_NAME( name1, name2, cpu ) \
      pixf->name1[PIXEL_8x16]  = x264_pixel_##name2##_8x16##cpu;\
      pixf->name1[PIXEL_8x8]   = x264_pixel_##name2##_8x8##cpu;
  #define INIT5_NAME( name1, name2, cpu ) \
      INIT4_NAME( name1, name2, cpu ) \
      pixf->name1[PIXEL_8x4]   = x264_pixel_##name2##_8x4##cpu;
  #define INIT6_NAME( name1, name2, cpu ) \
      INIT5_NAME( name1, name2, cpu ) \
      pixf->name1[PIXEL_4x8]   = x264_pixel_##name2##_4x8##cpu;
  #define INIT7_NAME( name1, name2, cpu ) \
      INIT6_NAME( name1, name2, cpu ) \
      pixf->name1[PIXEL_4x4]   = x264_pixel_##name2##_4x4##cpu;
  #define INIT8_NAME( name1, name2, cpu ) \
      INIT7_NAME( name1, name2, cpu ) \
      pixf->name1[PIXEL_4x16]  = x264_pixel_##name2##_4x16##cpu;
  #define INIT2( name, cpu ) INIT2_NAME( name, name, cpu )
  #define INIT4( name, cpu ) INIT4_NAME( name, name, cpu )
  #define INIT5( name, cpu ) INIT5_NAME( name, name, cpu )
  #define INIT6( name, cpu ) INIT6_NAME( name, name, cpu )
  #define INIT7( name, cpu ) INIT7_NAME( name, name, cpu )
  #define INIT8( name, cpu ) INIT8_NAME( name, name, cpu )
  
  #define INIT_ADS( cpu ) \
      pixf->ads[PIXEL_16x16] = x264_pixel_ads4##cpu;\
      pixf->ads[PIXEL_16x8] = x264_pixel_ads2##cpu;\
      pixf->ads[PIXEL_8x8] = x264_pixel_ads1##cpu;
  
      INIT8( sad, );
      INIT8_NAME( sad_aligned, sad, );
      INIT7( sad_x3, );
      INIT7( sad_x4, );
      INIT8( ssd, );
      INIT8( satd, );
      INIT7( satd_x3, );
      INIT7( satd_x4, );
      INIT4( hadamard_ac, );
      INIT_ADS( );
  
      pixf->sa8d[PIXEL_16x16] = x264_pixel_sa8d_16x16;
      pixf->sa8d[PIXEL_8x8]   = x264_pixel_sa8d_8x8;
      pixf->var[PIXEL_16x16] = pixel_var_16x16;
      pixf->var[PIXEL_8x16]  = pixel_var_8x16;
      pixf->var[PIXEL_8x8]   = pixel_var_8x8;
      pixf->var2[PIXEL_8x16]  = pixel_var2_8x16;
      pixf->var2[PIXEL_8x8]   = pixel_var2_8x8;
  
      pixf->ssd_nv12_core = pixel_ssd_nv12_core;
      pixf->ssim_4x4x2_core = ssim_4x4x2_core;
      pixf->ssim_end4 = ssim_end4;
      pixf->vsad = pixel_vsad;
      pixf->asd8 = pixel_asd8;
  
      pixf->intra_sad_x3_4x4    = intra_sad_x3_4x4;
      pixf->intra_satd_x3_4x4   = intra_satd_x3_4x4;
      pixf->intra_sad_x3_8x8    = intra_sad_x3_8x8;
      pixf->intra_sa8d_x3_8x8   = intra_sa8d_x3_8x8;
      pixf->intra_sad_x3_8x8c   = intra_sad_x3_8x8c;
      pixf->intra_satd_x3_8x8c  = intra_satd_x3_8x8c;
      pixf->intra_sad_x3_8x16c  = intra_sad_x3_8x16c;
      pixf->intra_satd_x3_8x16c = intra_satd_x3_8x16c;
      pixf->intra_sad_x3_16x16  = intra_sad_x3_16x16;
      pixf->intra_satd_x3_16x16 = intra_satd_x3_16x16;
  
  #if HIGH_BIT_DEPTH
  #if HAVE_MMX
      if( cpu&X264_CPU_MMX2 )
      {
          INIT7( sad, _mmx2 );
          INIT7_NAME( sad_aligned, sad, _mmx2 );
          INIT7( sad_x3, _mmx2 );
          INIT7( sad_x4, _mmx2 );
          INIT8( satd, _mmx2 );
          INIT7( satd_x3, _mmx2 );
          INIT7( satd_x4, _mmx2 );
          INIT4( hadamard_ac, _mmx2 );
          INIT8( ssd, _mmx2 );
          INIT_ADS( _mmx2 );
  
          pixf->intra_sad_x3_4x4    = intra_sad_x3_4x4_mmx2;
          pixf->intra_satd_x3_4x4   = x264_intra_satd_x3_4x4_mmx2;
          pixf->intra_sad_x3_8x8    = intra_sad_x3_8x8_mmx2;
          pixf->intra_sad_x3_8x8c   = intra_sad_x3_8x8c_mmx2;
          pixf->intra_satd_x3_8x8c  = x264_intra_satd_x3_8x8c_mmx2;
          pixf->intra_sad_x3_8x16c  = intra_sad_x3_8x16c_mmx2;
          pixf->intra_satd_x3_8x16c = intra_satd_x3_8x16c_mmx2;
          pixf->intra_sad_x3_16x16  = intra_sad_x3_16x16_mmx2;
          pixf->intra_satd_x3_16x16 = x264_intra_satd_x3_16x16_mmx2;
      }
      if( cpu&X264_CPU_SSE2 )
      {
          INIT4_NAME( sad_aligned, sad, _sse2_aligned );
          INIT5( ssd, _sse2 );
          INIT6( satd, _sse2 );
          pixf->satd[PIXEL_4x16] = x264_pixel_satd_4x16_sse2;
  
          pixf->ssd_nv12_core    = x264_pixel_ssd_nv12_core_sse2;
          pixf->ssim_4x4x2_core  = x264_pixel_ssim_4x4x2_core_sse2;
          pixf->ssim_end4        = x264_pixel_ssim_end4_sse2;
          pixf->var[PIXEL_16x16] = x264_pixel_var_16x16_sse2;
          pixf->var[PIXEL_8x8]   = x264_pixel_var_8x8_sse2;
          pixf->var2[PIXEL_8x8]  = x264_pixel_var2_8x8_sse2;
          pixf->var2[PIXEL_8x16] = x264_pixel_var2_8x16_sse2;
  
          pixf->sa8d[PIXEL_16x16] = x264_pixel_sa8d_16x16_sse2;
          pixf->sa8d[PIXEL_8x8]   = x264_pixel_sa8d_8x8_sse2;
  #if ARCH_X86_64
          pixf->sa8d_satd[PIXEL_16x16] = x264_pixel_sa8d_satd_16x16_sse2;
  #endif
          pixf->intra_sad_x3_4x4  = x264_intra_sad_x3_4x4_sse2;
          pixf->intra_sad_x3_8x8  = x264_intra_sad_x3_8x8_sse2;
          pixf->intra_sa8d_x3_8x8 = intra_sa8d_x3_8x8_sse2;
      }
      if( (cpu&X264_CPU_SSE2) && !(cpu&X264_CPU_SSE2_IS_SLOW) )
      {
          INIT5( sad, _sse2 );
          INIT2( sad_x3, _sse2 );
          INIT2( sad_x4, _sse2 );
          INIT_ADS( _sse2 );
  
          if( !(cpu&X264_CPU_STACK_MOD4) )
          {
              INIT4( hadamard_ac, _sse2 );
          }
          pixf->vsad = x264_pixel_vsad_sse2;
          pixf->asd8 = x264_pixel_asd8_sse2;
          pixf->intra_sad_x3_8x8    = x264_intra_sad_x3_8x8_sse2;
          pixf->intra_sad_x3_8x8c   = intra_sad_x3_8x8c_sse2;
          pixf->intra_sad_x3_8x16c  = intra_sad_x3_8x16c_sse2;
          pixf->intra_satd_x3_8x16c = intra_satd_x3_8x16c_sse2;
          pixf->intra_sad_x3_16x16  = intra_sad_x3_16x16_sse2;
      }
      if( cpu&X264_CPU_SSE2_IS_FAST )
      {
          pixf->sad[PIXEL_8x16] = x264_pixel_sad_8x16_sse2;
          pixf->sad_x3[PIXEL_8x16] = x264_pixel_sad_x3_8x16_sse2;
          pixf->sad_x3[PIXEL_8x8]  = x264_pixel_sad_x3_8x8_sse2;
          pixf->sad_x3[PIXEL_8x4]  = x264_pixel_sad_x3_8x4_sse2;
          pixf->sad_x4[PIXEL_8x16] = x264_pixel_sad_x4_8x16_sse2;
          pixf->sad_x4[PIXEL_8x8]  = x264_pixel_sad_x4_8x8_sse2;
          pixf->sad_x4[PIXEL_8x4]  = x264_pixel_sad_x4_8x4_sse2;
      }
      if( cpu&X264_CPU_SSSE3 )
      {
          INIT4_NAME( sad_aligned, sad, _ssse3_aligned );
          pixf->sad_aligned[PIXEL_4x4] = x264_pixel_sad_4x4_ssse3;
          pixf->sad_aligned[PIXEL_4x8] = x264_pixel_sad_4x8_ssse3;
          INIT7( sad, _ssse3 );
          INIT7( sad_x3, _ssse3 );
          INIT7( sad_x4, _ssse3 );
  #if ARCH_X86 || !defined( __MACH__ )
          INIT_ADS( _ssse3 );
  #endif
          INIT6( satd, _ssse3 );
          pixf->satd[PIXEL_4x16] = x264_pixel_satd_4x16_ssse3;
  
          if( !(cpu&X264_CPU_STACK_MOD4) )
          {
              INIT4( hadamard_ac, _ssse3 );
          }
          pixf->vsad = x264_pixel_vsad_ssse3;
          pixf->asd8 = x264_pixel_asd8_ssse3;
          pixf->sa8d[PIXEL_16x16]= x264_pixel_sa8d_16x16_ssse3;
          pixf->sa8d[PIXEL_8x8]  = x264_pixel_sa8d_8x8_ssse3;
  #if ARCH_X86_64
          pixf->sa8d_satd[PIXEL_16x16] = x264_pixel_sa8d_satd_16x16_ssse3;
  #endif
          pixf->intra_sad_x3_4x4    = x264_intra_sad_x3_4x4_ssse3;
          pixf->intra_sad_x3_8x8    = x264_intra_sad_x3_8x8_ssse3;
          pixf->intra_sad_x3_8x8c   = intra_sad_x3_8x8c_ssse3;
          pixf->intra_sad_x3_8x16c  = intra_sad_x3_8x16c_ssse3;
          pixf->intra_satd_x3_8x16c = intra_satd_x3_8x16c_ssse3;
          pixf->intra_sad_x3_16x16  = intra_sad_x3_16x16_ssse3;
      }
      if( cpu&X264_CPU_SSE4 )
      {
          INIT6( satd, _sse4 );
          pixf->satd[PIXEL_4x16] = x264_pixel_satd_4x16_sse4;
          if( !(cpu&X264_CPU_STACK_MOD4) )
          {
              INIT4( hadamard_ac, _sse4 );
          }
          pixf->sa8d[PIXEL_16x16]= x264_pixel_sa8d_16x16_sse4;
          pixf->sa8d[PIXEL_8x8]  = x264_pixel_sa8d_8x8_sse4;
  #if ARCH_X86_64
          pixf->sa8d_satd[PIXEL_16x16] = x264_pixel_sa8d_satd_16x16_sse4;
  #endif
          pixf->intra_satd_x3_8x16c = intra_satd_x3_8x16c_sse4;
      }
      if( cpu&X264_CPU_AVX )
      {
          INIT5_NAME( sad_aligned, sad, _ssse3 ); /* AVX-capable CPUs doesn't benefit from an aligned version */
  #if ARCH_X86 || !defined( __MACH__ )
          INIT_ADS( _avx );
  #endif
          INIT6( satd, _avx );
          pixf->satd[PIXEL_4x16] = x264_pixel_satd_4x16_avx;
          if( !(cpu&X264_CPU_STACK_MOD4) )
          {
              INIT4( hadamard_ac, _avx );
          }
          pixf->intra_sad_x3_4x4    = x264_intra_sad_x3_4x4_avx;
          pixf->sa8d[PIXEL_16x16]= x264_pixel_sa8d_16x16_avx;
          pixf->sa8d[PIXEL_8x8]  = x264_pixel_sa8d_8x8_avx;
          pixf->var[PIXEL_16x16] = x264_pixel_var_16x16_avx;
          pixf->var[PIXEL_8x8]   = x264_pixel_var_8x8_avx;
          pixf->ssd_nv12_core    = x264_pixel_ssd_nv12_core_avx;
          pixf->ssim_4x4x2_core  = x264_pixel_ssim_4x4x2_core_avx;
          pixf->ssim_end4        = x264_pixel_ssim_end4_avx;
  #if ARCH_X86_64
          pixf->sa8d_satd[PIXEL_16x16] = x264_pixel_sa8d_satd_16x16_avx;
  #endif
          pixf->intra_satd_x3_8x16c = intra_satd_x3_8x16c_avx;
      }
      if( cpu&X264_CPU_XOP )
      {
          INIT5( sad_x3, _xop );
          INIT5( sad_x4, _xop );
          pixf->ssd_nv12_core    = x264_pixel_ssd_nv12_core_xop;
          pixf->vsad = x264_pixel_vsad_xop;
          pixf->asd8 = x264_pixel_asd8_xop;
  #if ARCH_X86_64
          pixf->sa8d_satd[PIXEL_16x16] = x264_pixel_sa8d_satd_16x16_xop;
  #endif
      }
      if( cpu&X264_CPU_AVX2 )
      {
          INIT2( ssd, _avx2 );
          INIT2( sad, _avx2 );
          INIT2_NAME( sad_aligned, sad, _avx2 );
          INIT2( sad_x3, _avx2 );
          INIT2( sad_x4, _avx2 );
          pixf->var[PIXEL_16x16] = x264_pixel_var_16x16_avx2;
          pixf->var2[PIXEL_8x8]  = x264_pixel_var2_8x8_avx2;
          pixf->var2[PIXEL_8x16] = x264_pixel_var2_8x16_avx2;
          pixf->vsad = x264_pixel_vsad_avx2;
          pixf->ssd_nv12_core = x264_pixel_ssd_nv12_core_avx2;
          pixf->intra_sad_x3_8x8 = x264_intra_sad_x3_8x8_avx2;
      }
      if( cpu&X264_CPU_AVX512 )
      {
          pixf->var[PIXEL_8x16]  = x264_pixel_var_8x16_avx512;
          pixf->var[PIXEL_16x16] = x264_pixel_var_16x16_avx512;
          pixf->var2[PIXEL_8x8]  = x264_pixel_var2_8x8_avx512;
          pixf->var2[PIXEL_8x16] = x264_pixel_var2_8x16_avx512;
      }
  #endif // HAVE_MMX
  #else // !HIGH_BIT_DEPTH
  #if HAVE_MMX
      if( cpu&X264_CPU_MMX )
      {
          INIT8( ssd, _mmx );
      }
  
      if( cpu&X264_CPU_MMX2 )
      {
          INIT8( sad, _mmx2 );
          INIT8_NAME( sad_aligned, sad, _mmx2 );
          INIT7( sad_x3, _mmx2 );
          INIT7( sad_x4, _mmx2 );
          INIT8( satd, _mmx2 );
          INIT7( satd_x3, _mmx2 );
          INIT7( satd_x4, _mmx2 );
          INIT4( hadamard_ac, _mmx2 );
          INIT_ADS( _mmx2 );
  #if ARCH_X86
          pixf->sa8d[PIXEL_16x16] = x264_pixel_sa8d_16x16_mmx2;
          pixf->sa8d[PIXEL_8x8]   = x264_pixel_sa8d_8x8_mmx2;
          pixf->intra_sa8d_x3_8x8 = x264_intra_sa8d_x3_8x8_mmx2;
          pixf->ssim_4x4x2_core = x264_pixel_ssim_4x4x2_core_mmx2;
          pixf->vsad = x264_pixel_vsad_mmx2;
  
          if( cpu&X264_CPU_CACHELINE_32 )
          {
              INIT5( sad, _cache32_mmx2 );
              INIT4( sad_x3, _cache32_mmx2 );
              INIT4( sad_x4, _cache32_mmx2 );
          }
          else if( cpu&X264_CPU_CACHELINE_64 && !(cpu&X264_CPU_SLOW_ATOM) )
          {
              INIT5( sad, _cache64_mmx2 );
              INIT4( sad_x3, _cache64_mmx2 );
              INIT4( sad_x4, _cache64_mmx2 );
          }
  #else
          if( cpu&X264_CPU_CACHELINE_64 && !(cpu&X264_CPU_SLOW_ATOM) )
          {
              pixf->sad[PIXEL_8x16] = x264_pixel_sad_8x16_cache64_mmx2;
              pixf->sad[PIXEL_8x8]  = x264_pixel_sad_8x8_cache64_mmx2;
              pixf->sad[PIXEL_8x4]  = x264_pixel_sad_8x4_cache64_mmx2;
              pixf->sad_x3[PIXEL_8x16] = x264_pixel_sad_x3_8x16_cache64_mmx2;
              pixf->sad_x3[PIXEL_8x8]  = x264_pixel_sad_x3_8x8_cache64_mmx2;
              pixf->sad_x4[PIXEL_8x16] = x264_pixel_sad_x4_8x16_cache64_mmx2;
              pixf->sad_x4[PIXEL_8x8]  = x264_pixel_sad_x4_8x8_cache64_mmx2;
          }
  #endif
          pixf->intra_satd_x3_16x16 = x264_intra_satd_x3_16x16_mmx2;
          pixf->intra_sad_x3_16x16  = x264_intra_sad_x3_16x16_mmx2;
          pixf->intra_satd_x3_8x16c = intra_satd_x3_8x16c_mmx2;
          pixf->intra_sad_x3_8x16c  = intra_sad_x3_8x16c_mmx2;
          pixf->intra_satd_x3_8x8c  = x264_intra_satd_x3_8x8c_mmx2;
          pixf->intra_sad_x3_8x8c   = x264_intra_sad_x3_8x8c_mmx2;
          pixf->intra_sad_x3_8x8    = x264_intra_sad_x3_8x8_mmx2;
          pixf->intra_satd_x3_4x4   = x264_intra_satd_x3_4x4_mmx2;
          pixf->intra_sad_x3_4x4    = x264_intra_sad_x3_4x4_mmx2;
      }
  
      if( cpu&X264_CPU_SSE2 )
      {
          INIT5( ssd, _sse2slow );
          INIT2_NAME( sad_aligned, sad, _sse2_aligned );
          pixf->var[PIXEL_16x16] = x264_pixel_var_16x16_sse2;
          pixf->ssd_nv12_core    = x264_pixel_ssd_nv12_core_sse2;
          pixf->ssim_4x4x2_core  = x264_pixel_ssim_4x4x2_core_sse2;
          pixf->ssim_end4        = x264_pixel_ssim_end4_sse2;
          pixf->sa8d[PIXEL_16x16] = x264_pixel_sa8d_16x16_sse2;
          pixf->sa8d[PIXEL_8x8]   = x264_pixel_sa8d_8x8_sse2;
  #if ARCH_X86_64
          pixf->intra_sa8d_x3_8x8 = x264_intra_sa8d_x3_8x8_sse2;
          pixf->sa8d_satd[PIXEL_16x16] = x264_pixel_sa8d_satd_16x16_sse2;
  #endif
          pixf->var2[PIXEL_8x8]   = x264_pixel_var2_8x8_sse2;
          pixf->var2[PIXEL_8x16]  = x264_pixel_var2_8x16_sse2;
          pixf->vsad = x264_pixel_vsad_sse2;
          pixf->asd8 = x264_pixel_asd8_sse2;
      }
  
      if( (cpu&X264_CPU_SSE2) && !(cpu&X264_CPU_SSE2_IS_SLOW) )
      {
          INIT2( sad, _sse2 );
          INIT2( sad_x3, _sse2 );
          INIT2( sad_x4, _sse2 );
          INIT6( satd, _sse2 );
          pixf->satd[PIXEL_4x16]   = x264_pixel_satd_4x16_sse2;
          INIT6( satd_x3, _sse2 );
          INIT6( satd_x4, _sse2 );
          INIT4( hadamard_ac, _sse2 );
          INIT_ADS( _sse2 );
          pixf->var[PIXEL_8x8] = x264_pixel_var_8x8_sse2;
          pixf->var[PIXEL_8x16] = x264_pixel_var_8x16_sse2;
          pixf->intra_sad_x3_16x16 = x264_intra_sad_x3_16x16_sse2;
          pixf->intra_satd_x3_8x16c = intra_satd_x3_8x16c_sse2;
          pixf->intra_sad_x3_8x16c  = intra_sad_x3_8x16c_sse2;
          if( cpu&X264_CPU_CACHELINE_64 )
          {
              INIT2( ssd, _sse2); /* faster for width 16 on p4 */
  #if ARCH_X86
              INIT2( sad, _cache64_sse2 );
              INIT2( sad_x3, _cache64_sse2 );
              INIT2( sad_x4, _cache64_sse2 );
  #endif
             if( cpu&X264_CPU_SSE2_IS_FAST )
             {
                 pixf->sad_x3[PIXEL_8x16] = x264_pixel_sad_x3_8x16_cache64_sse2;
                 pixf->sad_x4[PIXEL_8x16] = x264_pixel_sad_x4_8x16_cache64_sse2;
             }
          }
      }
  
      if( cpu&X264_CPU_SSE2_IS_FAST && !(cpu&X264_CPU_CACHELINE_64) )
      {
          pixf->sad_aligned[PIXEL_8x16] = x264_pixel_sad_8x16_sse2;
          pixf->sad[PIXEL_8x16] = x264_pixel_sad_8x16_sse2;
          pixf->sad_x3[PIXEL_8x16] = x264_pixel_sad_x3_8x16_sse2;
          pixf->sad_x3[PIXEL_8x8] = x264_pixel_sad_x3_8x8_sse2;
          pixf->sad_x3[PIXEL_8x4] = x264_pixel_sad_x3_8x4_sse2;
          pixf->sad_x4[PIXEL_8x16] = x264_pixel_sad_x4_8x16_sse2;
          pixf->sad_x4[PIXEL_8x8] = x264_pixel_sad_x4_8x8_sse2;
          pixf->sad_x4[PIXEL_8x4] = x264_pixel_sad_x4_8x4_sse2;
      }
  
      if( (cpu&X264_CPU_SSE3) && (cpu&X264_CPU_CACHELINE_64) )
      {
          INIT2( sad, _sse3 );
          INIT2( sad_x3, _sse3 );
          INIT2( sad_x4, _sse3 );
      }
  
      if( cpu&X264_CPU_SSSE3 )
      {
          INIT4( hadamard_ac, _ssse3 );
          if( !(cpu&X264_CPU_STACK_MOD4) )
          {
              pixf->intra_sad_x9_4x4  = x264_intra_sad_x9_4x4_ssse3;
              pixf->intra_satd_x9_4x4 = x264_intra_satd_x9_4x4_ssse3;
              pixf->intra_sad_x9_8x8  = x264_intra_sad_x9_8x8_ssse3;
  #if ARCH_X86_64
              pixf->intra_sa8d_x9_8x8 = x264_intra_sa8d_x9_8x8_ssse3;
  #endif
          }
  #if ARCH_X86 || !defined( __MACH__ )
          INIT_ADS( _ssse3 );
  #endif
          if( cpu&X264_CPU_SLOW_ATOM )
          {
              pixf->sa8d[PIXEL_16x16]= x264_pixel_sa8d_16x16_ssse3_atom;
              pixf->sa8d[PIXEL_8x8]  = x264_pixel_sa8d_8x8_ssse3_atom;
              INIT6( satd, _ssse3_atom );
              pixf->satd[PIXEL_4x16]  = x264_pixel_satd_4x16_ssse3_atom;
              INIT6( satd_x3, _ssse3_atom );
              INIT6( satd_x4, _ssse3_atom );
              INIT4( hadamard_ac, _ssse3_atom );
  #if ARCH_X86_64
              pixf->sa8d_satd[PIXEL_16x16] = x264_pixel_sa8d_satd_16x16_ssse3_atom;
  #endif
          }
          else
          {
              INIT8( ssd, _ssse3 );
              pixf->sa8d[PIXEL_16x16]= x264_pixel_sa8d_16x16_ssse3;
              pixf->sa8d[PIXEL_8x8]  = x264_pixel_sa8d_8x8_ssse3;
              INIT8( satd, _ssse3 );
              INIT7( satd_x3, _ssse3 );
              INIT7( satd_x4, _ssse3 );
  #if ARCH_X86_64
              pixf->sa8d_satd[PIXEL_16x16] = x264_pixel_sa8d_satd_16x16_ssse3;
  #endif
          }
          pixf->intra_satd_x3_16x16 = x264_intra_satd_x3_16x16_ssse3;
          if( !(cpu&X264_CPU_SLOW_PSHUFB) )
              pixf->intra_sad_x3_16x16  = x264_intra_sad_x3_16x16_ssse3;
          pixf->intra_satd_x3_8x16c = intra_satd_x3_8x16c_ssse3;
          pixf->intra_satd_x3_8x8c  = x264_intra_satd_x3_8x8c_ssse3;
          pixf->intra_sad_x3_8x8c   = x264_intra_sad_x3_8x8c_ssse3;
          pixf->var2[PIXEL_8x8] = x264_pixel_var2_8x8_ssse3;
          pixf->var2[PIXEL_8x16] = x264_pixel_var2_8x16_ssse3;
          pixf->asd8 = x264_pixel_asd8_ssse3;
          if( cpu&X264_CPU_CACHELINE_64 )
          {
              INIT2( sad, _cache64_ssse3 );
              INIT2( sad_x3, _cache64_ssse3 );
              INIT2( sad_x4, _cache64_ssse3 );
          }
          else
          {
              INIT2( sad_x3, _ssse3 );
              INIT5( sad_x4, _ssse3 );
          }
          if( (cpu&X264_CPU_SLOW_ATOM) || (cpu&X264_CPU_SLOW_SHUFFLE) )
          {
              INIT5( ssd, _sse2 ); /* on conroe, sse2 is faster for width8/16 */
          }
      }
  
      if( cpu&X264_CPU_SSE4 )
      {
          INIT8( satd, _sse4 );
          INIT7( satd_x3, _sse4 );
          INIT7( satd_x4, _sse4 );
          INIT4( hadamard_ac, _sse4 );
          if( !(cpu&X264_CPU_STACK_MOD4) )
          {
              pixf->intra_sad_x9_4x4  = x264_intra_sad_x9_4x4_sse4;
              pixf->intra_satd_x9_4x4 = x264_intra_satd_x9_4x4_sse4;
              pixf->intra_sad_x9_8x8  = x264_intra_sad_x9_8x8_sse4;
  #if ARCH_X86_64
              pixf->intra_sa8d_x9_8x8 = x264_intra_sa8d_x9_8x8_sse4;
  #endif
          }
          pixf->sa8d[PIXEL_16x16]= x264_pixel_sa8d_16x16_sse4;
          pixf->sa8d[PIXEL_8x8]  = x264_pixel_sa8d_8x8_sse4;
          pixf->intra_satd_x3_8x16c = intra_satd_x3_8x16c_sse4;
  #if ARCH_X86_64
          pixf->sa8d_satd[PIXEL_16x16] = x264_pixel_sa8d_satd_16x16_sse4;
  #endif
      }
  
      if( cpu&X264_CPU_AVX )
      {
          INIT2_NAME( sad_aligned, sad, _sse2 ); /* AVX-capable CPUs doesn't benefit from an aligned version */
          INIT2( sad_x3, _avx );
          INIT2( sad_x4, _avx );
          INIT8( satd, _avx );
          INIT7( satd_x3, _avx );
          INIT7( satd_x4, _avx );
  #if ARCH_X86 || !defined( __MACH__ )
          INIT_ADS( _avx );
  #endif
          INIT4( hadamard_ac, _avx );
          if( !(cpu&X264_CPU_STACK_MOD4) )
          {
              pixf->intra_sad_x9_4x4  = x264_intra_sad_x9_4x4_avx;
              pixf->intra_satd_x9_4x4 = x264_intra_satd_x9_4x4_avx;
              pixf->intra_sad_x9_8x8  = x264_intra_sad_x9_8x8_avx;
  #if ARCH_X86_64
              pixf->intra_sa8d_x9_8x8 = x264_intra_sa8d_x9_8x8_avx;
  #endif
          }
          INIT5( ssd, _avx );
          pixf->sa8d[PIXEL_16x16]= x264_pixel_sa8d_16x16_avx;
          pixf->sa8d[PIXEL_8x8]  = x264_pixel_sa8d_8x8_avx;
          pixf->intra_satd_x3_8x16c = intra_satd_x3_8x16c_avx;
          pixf->ssd_nv12_core    = x264_pixel_ssd_nv12_core_avx;
          pixf->var[PIXEL_16x16] = x264_pixel_var_16x16_avx;
          pixf->var[PIXEL_8x16]  = x264_pixel_var_8x16_avx;
          pixf->var[PIXEL_8x8]   = x264_pixel_var_8x8_avx;
          pixf->ssim_4x4x2_core  = x264_pixel_ssim_4x4x2_core_avx;
          pixf->ssim_end4        = x264_pixel_ssim_end4_avx;
  #if ARCH_X86_64
          pixf->sa8d_satd[PIXEL_16x16] = x264_pixel_sa8d_satd_16x16_avx;
  #endif
      }
  
      if( cpu&X264_CPU_XOP )
      {
          INIT7( satd, _xop );
          INIT7( satd_x3, _xop );
          INIT7( satd_x4, _xop );
          INIT4( hadamard_ac, _xop );
          if( !(cpu&X264_CPU_STACK_MOD4) )
          {
              pixf->intra_satd_x9_4x4 = x264_intra_satd_x9_4x4_xop;
          }
          INIT5( ssd, _xop );
          pixf->sa8d[PIXEL_16x16]= x264_pixel_sa8d_16x16_xop;
          pixf->sa8d[PIXEL_8x8]  = x264_pixel_sa8d_8x8_xop;
          pixf->intra_satd_x3_8x16c = intra_satd_x3_8x16c_xop;
          pixf->ssd_nv12_core    = x264_pixel_ssd_nv12_core_xop;
  #if ARCH_X86_64
          pixf->sa8d_satd[PIXEL_16x16] = x264_pixel_sa8d_satd_16x16_xop;
  #endif
      }
  
      if( cpu&X264_CPU_AVX2 )
      {
          INIT2( ssd, _avx2 );
          INIT2( sad_x3, _avx2 );
          INIT2( sad_x4, _avx2 );
          INIT4( satd, _avx2 );
          INIT2( hadamard_ac, _avx2 );
  #if ARCH_X86 || !defined( __MACH__ )
          INIT_ADS( _avx2 );
  #endif
          pixf->sa8d[PIXEL_8x8]  = x264_pixel_sa8d_8x8_avx2;
          pixf->var[PIXEL_16x16] = x264_pixel_var_16x16_avx2;
          pixf->var2[PIXEL_8x16]  = x264_pixel_var2_8x16_avx2;
          pixf->var2[PIXEL_8x8]   = x264_pixel_var2_8x8_avx2;
          pixf->intra_sad_x3_16x16 = x264_intra_sad_x3_16x16_avx2;
          pixf->intra_sad_x9_8x8  = x264_intra_sad_x9_8x8_avx2;
          pixf->intra_sad_x3_8x8c = x264_intra_sad_x3_8x8c_avx2;
          pixf->ssd_nv12_core = x264_pixel_ssd_nv12_core_avx2;
  #if ARCH_X86_64
          pixf->sa8d_satd[PIXEL_16x16] = x264_pixel_sa8d_satd_16x16_avx2;
  #endif
      }
  
      if( cpu&X264_CPU_AVX512 )
      {
          INIT8( sad, _avx512 );
          INIT8_NAME( sad_aligned, sad, _avx512 );
          INIT7( sad_x3, _avx512 );
          INIT7( sad_x4, _avx512 );
          INIT8( satd, _avx512 );
          INIT7( satd_x3, _avx512 );
          INIT7( satd_x4, _avx512 );
          pixf->sa8d[PIXEL_8x8] = x264_pixel_sa8d_8x8_avx512;
          pixf->var[PIXEL_8x8]   = x264_pixel_var_8x8_avx512;
          pixf->var[PIXEL_8x16]  = x264_pixel_var_8x16_avx512;
          pixf->var[PIXEL_16x16] = x264_pixel_var_16x16_avx512;
          pixf->var2[PIXEL_8x8]  = x264_pixel_var2_8x8_avx512;
          pixf->var2[PIXEL_8x16] = x264_pixel_var2_8x16_avx512;
      }
  #endif //HAVE_MMX
  
  #if HAVE_ARMV6
      if( cpu&X264_CPU_ARMV6 )
      {
          pixf->sad[PIXEL_4x8] = x264_pixel_sad_4x8_armv6;
          pixf->sad[PIXEL_4x4] = x264_pixel_sad_4x4_armv6;
          pixf->sad_aligned[PIXEL_4x8] = x264_pixel_sad_4x8_armv6;
          pixf->sad_aligned[PIXEL_4x4] = x264_pixel_sad_4x4_armv6;
      }
      if( cpu&X264_CPU_NEON )
      {
          INIT5( sad, _neon );
          INIT5( sad_aligned, _neon );
          INIT7( sad_x3, _neon );
          INIT7( sad_x4, _neon );
          INIT7( ssd, _neon );
          INIT7( satd, _neon );
          INIT7( satd_x3, _neon );
          INIT7( satd_x4, _neon );
          INIT4( hadamard_ac, _neon );
          pixf->sa8d[PIXEL_8x8]   = x264_pixel_sa8d_8x8_neon;
          pixf->sa8d[PIXEL_16x16] = x264_pixel_sa8d_16x16_neon;
          pixf->sa8d_satd[PIXEL_16x16] = x264_pixel_sa8d_satd_16x16_neon;
          pixf->var[PIXEL_8x8]    = x264_pixel_var_8x8_neon;
          pixf->var[PIXEL_8x16]   = x264_pixel_var_8x16_neon;
          pixf->var[PIXEL_16x16]  = x264_pixel_var_16x16_neon;
          pixf->var2[PIXEL_8x8]   = x264_pixel_var2_8x8_neon;
          pixf->var2[PIXEL_8x16]  = x264_pixel_var2_8x16_neon;
          pixf->vsad = x264_pixel_vsad_neon;
          pixf->asd8 = x264_pixel_asd8_neon;
  
          pixf->intra_sad_x3_4x4    = intra_sad_x3_4x4_neon;
          pixf->intra_satd_x3_4x4   = intra_satd_x3_4x4_neon;
          pixf->intra_sad_x3_8x8    = intra_sad_x3_8x8_neon;
          pixf->intra_sa8d_x3_8x8   = intra_sa8d_x3_8x8_neon;
          pixf->intra_sad_x3_8x8c   = intra_sad_x3_8x8c_neon;
          pixf->intra_satd_x3_8x8c  = intra_satd_x3_8x8c_neon;
          pixf->intra_sad_x3_8x16c  = intra_sad_x3_8x16c_neon;
          pixf->intra_satd_x3_8x16c = intra_satd_x3_8x16c_neon;
          pixf->intra_sad_x3_16x16  = intra_sad_x3_16x16_neon;
          pixf->intra_satd_x3_16x16 = intra_satd_x3_16x16_neon;
  
          pixf->ssd_nv12_core     = x264_pixel_ssd_nv12_core_neon;
          pixf->ssim_4x4x2_core   = x264_pixel_ssim_4x4x2_core_neon;
          pixf->ssim_end4         = x264_pixel_ssim_end4_neon;
  
          if( cpu&X264_CPU_FAST_NEON_MRC )
          {
              pixf->sad[PIXEL_4x8] = x264_pixel_sad_4x8_neon;
              pixf->sad[PIXEL_4x4] = x264_pixel_sad_4x4_neon;
              pixf->sad_aligned[PIXEL_4x8] = x264_pixel_sad_aligned_4x8_neon;
              pixf->sad_aligned[PIXEL_4x4] = x264_pixel_sad_aligned_4x4_neon;
          }
          else    // really just scheduled for dual issue / A8
          {
              INIT5( sad_aligned, _neon_dual );
          }
      }
  #endif
  
  #if ARCH_AARCH64
      if( cpu&X264_CPU_NEON )
      {
          INIT8( sad, _neon );
          // AArch64 has no distinct instructions for aligned load/store
          INIT8_NAME( sad_aligned, sad, _neon );
          INIT7( sad_x3, _neon );
          INIT7( sad_x4, _neon );
          INIT8( ssd, _neon );
          INIT8( satd, _neon );
          INIT7( satd_x3, _neon );
          INIT7( satd_x4, _neon );
          INIT4( hadamard_ac, _neon );
  
          pixf->sa8d[PIXEL_8x8]   = x264_pixel_sa8d_8x8_neon;
          pixf->sa8d[PIXEL_16x16] = x264_pixel_sa8d_16x16_neon;
          pixf->sa8d_satd[PIXEL_16x16] = x264_pixel_sa8d_satd_16x16_neon;
  
          pixf->var[PIXEL_8x8]    = x264_pixel_var_8x8_neon;
          pixf->var[PIXEL_8x16]   = x264_pixel_var_8x16_neon;
          pixf->var[PIXEL_16x16]  = x264_pixel_var_16x16_neon;
          pixf->var2[PIXEL_8x8]   = x264_pixel_var2_8x8_neon;
          pixf->var2[PIXEL_8x16]  = x264_pixel_var2_8x16_neon;
          pixf->vsad = x264_pixel_vsad_neon;
          pixf->asd8 = x264_pixel_asd8_neon;
  
          pixf->intra_sad_x3_4x4    = intra_sad_x3_4x4_neon;
          pixf->intra_satd_x3_4x4   = intra_satd_x3_4x4_neon;
          pixf->intra_sad_x3_8x8    = intra_sad_x3_8x8_neon;
          pixf->intra_sa8d_x3_8x8   = intra_sa8d_x3_8x8_neon;
          pixf->intra_sad_x3_8x8c   = intra_sad_x3_8x8c_neon;
          pixf->intra_satd_x3_8x8c  = intra_satd_x3_8x8c_neon;
          pixf->intra_sad_x3_8x16c  = intra_sad_x3_8x16c_neon;
          pixf->intra_satd_x3_8x16c = intra_satd_x3_8x16c_neon;
          pixf->intra_sad_x3_16x16  = intra_sad_x3_16x16_neon;
          pixf->intra_satd_x3_16x16 = intra_satd_x3_16x16_neon;
  
          pixf->ssd_nv12_core     = x264_pixel_ssd_nv12_core_neon;
          pixf->ssim_4x4x2_core   = x264_pixel_ssim_4x4x2_core_neon;
          pixf->ssim_end4         = x264_pixel_ssim_end4_neon;
      }
  #endif // ARCH_AARCH64
  
  #if HAVE_MSA
      if( cpu&X264_CPU_MSA )
      {
          INIT8( sad, _msa );
          INIT8_NAME( sad_aligned, sad, _msa );
          INIT8( ssd, _msa );
          INIT7( sad_x3, _msa );
          INIT7( sad_x4, _msa );
          INIT8( satd, _msa );
          INIT4( hadamard_ac, _msa );
  
          pixf->intra_sad_x3_4x4   = x264_intra_sad_x3_4x4_msa;
          pixf->intra_sad_x3_8x8   = x264_intra_sad_x3_8x8_msa;
          pixf->intra_sad_x3_8x8c  = x264_intra_sad_x3_8x8c_msa;
          pixf->intra_sad_x3_16x16 = x264_intra_sad_x3_16x16_msa;
          pixf->intra_satd_x3_4x4   = x264_intra_satd_x3_4x4_msa;
          pixf->intra_satd_x3_16x16 = x264_intra_satd_x3_16x16_msa;
          pixf->intra_satd_x3_8x8c  = x264_intra_satd_x3_8x8c_msa;
          pixf->intra_sa8d_x3_8x8   = x264_intra_sa8d_x3_8x8_msa;
  
          pixf->ssim_4x4x2_core = x264_ssim_4x4x2_core_msa;
  
          pixf->var[PIXEL_16x16] = x264_pixel_var_16x16_msa;
          pixf->var[PIXEL_8x16]  = x264_pixel_var_8x16_msa;
          pixf->var[PIXEL_8x8]   = x264_pixel_var_8x8_msa;
        //pixf->var2[PIXEL_8x16]  = x264_pixel_var2_8x16_msa;
        //pixf->var2[PIXEL_8x8]   = x264_pixel_var2_8x8_msa;
          pixf->sa8d[PIXEL_16x16] = x264_pixel_sa8d_16x16_msa;
          pixf->sa8d[PIXEL_8x8]   = x264_pixel_sa8d_8x8_msa;
      }
  #endif // HAVE_MSA
  
  #endif // HIGH_BIT_DEPTH
  #if HAVE_ALTIVEC
      if( cpu&X264_CPU_ALTIVEC )
      {
          x264_pixel_init_altivec( pixf );
      }
  #endif
  
      pixf->ads[PIXEL_8x16] =
      pixf->ads[PIXEL_8x4] =
      pixf->ads[PIXEL_4x8] = pixf->ads[PIXEL_16x8];
      pixf->ads[PIXEL_4x4] = pixf->ads[PIXEL_8x8];
  }
  
  