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3rdparty/ffmpeg-4.4.4/x264/common/x86/sad16-a.asm 16.5 KB
f244cbd5   Hu Chunming   ffmpeg支持h264编码
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  ;*****************************************************************************
  ;* sad16-a.asm: x86 high depth sad functions
  ;*****************************************************************************
  ;* Copyright (C) 2010-2024 x264 project
  ;*
  ;* Authors: Oskar Arvidsson <oskar@irock.se>
  ;*          Henrik Gramner <henrik@gramner.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 "x86inc.asm"
  %include "x86util.asm"
  
  SECTION .text
  
  cextern pw_1
  cextern pw_4
  cextern pw_8
  
  ;=============================================================================
  ; SAD MMX
  ;=============================================================================
  
  %macro SAD_INC_1x16P_MMX 0
      movu    m1, [r0+ 0]
      movu    m2, [r0+ 8]
      movu    m3, [r0+16]
      movu    m4, [r0+24]
      psubw   m1, [r2+ 0]
      psubw   m2, [r2+ 8]
      psubw   m3, [r2+16]
      psubw   m4, [r2+24]
      ABSW2   m1, m2, m1, m2, m5, m6
      ABSW2   m3, m4, m3, m4, m7, m5
      lea     r0, [r0+2*r1]
      lea     r2, [r2+2*r3]
      paddw   m1, m2
      paddw   m3, m4
      paddw   m0, m1
      paddw   m0, m3
  %endmacro
  
  %macro SAD_INC_2x8P_MMX 0
      movu    m1, [r0+0]
      movu    m2, [r0+8]
      movu    m3, [r0+2*r1+0]
      movu    m4, [r0+2*r1+8]
      psubw   m1, [r2+0]
      psubw   m2, [r2+8]
      psubw   m3, [r2+2*r3+0]
      psubw   m4, [r2+2*r3+8]
      ABSW2   m1, m2, m1, m2, m5, m6
      ABSW2   m3, m4, m3, m4, m7, m5
      lea     r0, [r0+4*r1]
      lea     r2, [r2+4*r3]
      paddw   m1, m2
      paddw   m3, m4
      paddw   m0, m1
      paddw   m0, m3
  %endmacro
  
  %macro SAD_INC_2x4P_MMX 0
      movu    m1, [r0]
      movu    m2, [r0+2*r1]
      psubw   m1, [r2]
      psubw   m2, [r2+2*r3]
      ABSW2   m1, m2, m1, m2, m3, m4
      lea     r0, [r0+4*r1]
      lea     r2, [r2+4*r3]
      paddw   m0, m1
      paddw   m0, m2
  %endmacro
  
  ;-----------------------------------------------------------------------------
  ; int pixel_sad_NxM( uint16_t *, intptr_t, uint16_t *, intptr_t )
  ;-----------------------------------------------------------------------------
  %macro SAD_MMX 3
  cglobal pixel_sad_%1x%2, 4,5-(%2&4/4)
      pxor    m0, m0
  %if %2 == 4
      SAD_INC_%3x%1P_MMX
      SAD_INC_%3x%1P_MMX
  %else
      mov    r4d, %2/%3
  .loop:
      SAD_INC_%3x%1P_MMX
      dec    r4d
      jg .loop
  %endif
  %if %1*%2 == 256
      HADDUW  m0, m1
  %else
      HADDW   m0, m1
  %endif
      movd   eax, m0
      RET
  %endmacro
  
  INIT_MMX mmx2
  SAD_MMX 16, 16, 1
  SAD_MMX 16,  8, 1
  SAD_MMX  8, 16, 2
  SAD_MMX  8,  8, 2
  SAD_MMX  8,  4, 2
  SAD_MMX  4,  8, 2
  SAD_MMX  4,  4, 2
  INIT_MMX ssse3
  SAD_MMX  4,  8, 2
  SAD_MMX  4,  4, 2
  
  ;=============================================================================
  ; SAD XMM
  ;=============================================================================
  
  %macro SAD_INC_2ROW 1
  %if 2*%1 > mmsize
      movu    m1, [r2+ 0]
      movu    m2, [r2+16]
      movu    m3, [r2+2*r3+ 0]
      movu    m4, [r2+2*r3+16]
      psubw   m1, [r0+ 0]
      psubw   m2, [r0+16]
      psubw   m3, [r0+2*r1+ 0]
      psubw   m4, [r0+2*r1+16]
      ABSW2   m1, m2, m1, m2, m5, m6
      lea     r0, [r0+4*r1]
      lea     r2, [r2+4*r3]
      ABSW2   m3, m4, m3, m4, m7, m5
      paddw   m1, m2
      paddw   m3, m4
      paddw   m0, m1
      paddw   m0, m3
  %else
      movu    m1, [r2]
      movu    m2, [r2+2*r3]
      psubw   m1, [r0]
      psubw   m2, [r0+2*r1]
      ABSW2   m1, m2, m1, m2, m3, m4
      lea     r0, [r0+4*r1]
      lea     r2, [r2+4*r3]
      paddw   m0, m1
      paddw   m0, m2
  %endif
  %endmacro
  
  ;-----------------------------------------------------------------------------
  ; int pixel_sad_NxM( uint16_t *, intptr_t, uint16_t *, intptr_t )
  ;-----------------------------------------------------------------------------
  %macro SAD 2
  cglobal pixel_sad_%1x%2, 4,5-(%2&4/4),8*(%1/mmsize)
      pxor    m0, m0
  %if %2 == 4
      SAD_INC_2ROW %1
      SAD_INC_2ROW %1
  %else
      mov    r4d, %2/2
  .loop:
      SAD_INC_2ROW %1
      dec    r4d
      jg .loop
  %endif
      HADDW   m0, m1
      movd   eax, xm0
      RET
  %endmacro
  
  INIT_XMM sse2
  SAD 16, 16
  SAD 16,  8
  SAD  8, 16
  SAD  8,  8
  SAD  8,  4
  INIT_XMM sse2, aligned
  SAD 16, 16
  SAD 16,  8
  SAD  8, 16
  SAD  8,  8
  INIT_XMM ssse3
  SAD 16, 16
  SAD 16,  8
  SAD  8, 16
  SAD  8,  8
  SAD  8,  4
  INIT_XMM ssse3, aligned
  SAD 16, 16
  SAD 16,  8
  SAD  8, 16
  SAD  8,  8
  INIT_YMM avx2
  SAD 16, 16
  SAD 16,  8
  
  ;=============================================================================
  ; SAD x3/x4
  ;=============================================================================
  
  %macro SAD_X3_INC_P 0
      add     r0, 4*FENC_STRIDE
      lea     r1, [r1+4*r4]
      lea     r2, [r2+4*r4]
      lea     r3, [r3+4*r4]
  %endmacro
  
  %macro SAD_X3_ONE_START 0
      mova    m3, [r0]
      movu    m0, [r1]
      movu    m1, [r2]
      movu    m2, [r3]
      psubw   m0, m3
      psubw   m1, m3
      psubw   m2, m3
      ABSW2   m0, m1, m0, m1, m4, m5
      ABSW    m2, m2, m6
  %endmacro
  
  %macro SAD_X3_ONE 2
      mova    m6, [r0+%1]
      movu    m3, [r1+%2]
      movu    m4, [r2+%2]
      movu    m5, [r3+%2]
      psubw   m3, m6
      psubw   m4, m6
      psubw   m5, m6
      ABSW2   m3, m4, m3, m4, m7, m6
      ABSW    m5, m5, m6
      paddw   m0, m3
      paddw   m1, m4
      paddw   m2, m5
  %endmacro
  
  %macro SAD_X3_END 2
  %if mmsize == 8 && %1*%2 == 256
      HADDUW   m0, m3
      HADDUW   m1, m4
      HADDUW   m2, m5
  %else
      HADDW    m0, m3
      HADDW    m1, m4
      HADDW    m2, m5
  %endif
  %if UNIX64
      movd [r5+0], xm0
      movd [r5+4], xm1
      movd [r5+8], xm2
  %else
      mov      r0, r5mp
      movd [r0+0], xm0
      movd [r0+4], xm1
      movd [r0+8], xm2
  %endif
      RET
  %endmacro
  
  %macro SAD_X4_INC_P 0
      add     r0, 4*FENC_STRIDE
      lea     r1, [r1+4*r5]
      lea     r2, [r2+4*r5]
      lea     r3, [r3+4*r5]
      lea     r4, [r4+4*r5]
  %endmacro
  
  %macro SAD_X4_ONE_START 0
      mova    m4, [r0]
      movu    m0, [r1]
      movu    m1, [r2]
      movu    m2, [r3]
      movu    m3, [r4]
      psubw   m0, m4
      psubw   m1, m4
      psubw   m2, m4
      psubw   m3, m4
      ABSW2   m0, m1, m0, m1, m5, m6
      ABSW2   m2, m3, m2, m3, m4, m7
  %endmacro
  
  %macro SAD_X4_ONE 2
      mova    m4, [r0+%1]
      movu    m5, [r1+%2]
      movu    m6, [r2+%2]
  %if num_mmregs > 8
      movu    m7, [r3+%2]
      movu    m8, [r4+%2]
      psubw   m5, m4
      psubw   m6, m4
      psubw   m7, m4
      psubw   m8, m4
      ABSW2   m5, m6, m5, m6, m9, m10
      ABSW2   m7, m8, m7, m8, m9, m10
      paddw   m0, m5
      paddw   m1, m6
      paddw   m2, m7
      paddw   m3, m8
  %elif cpuflag(ssse3)
      movu    m7, [r3+%2]
      psubw   m5, m4
      psubw   m6, m4
      psubw   m7, m4
      movu    m4, [r4+%2]
      pabsw   m5, m5
      psubw   m4, [r0+%1]
      pabsw   m6, m6
      pabsw   m7, m7
      pabsw   m4, m4
      paddw   m0, m5
      paddw   m1, m6
      paddw   m2, m7
      paddw   m3, m4
  %else ; num_mmregs == 8 && !ssse3
      psubw   m5, m4
      psubw   m6, m4
      ABSW    m5, m5, m7
      ABSW    m6, m6, m7
      paddw   m0, m5
      paddw   m1, m6
      movu    m5, [r3+%2]
      movu    m6, [r4+%2]
      psubw   m5, m4
      psubw   m6, m4
      ABSW2   m5, m6, m5, m6, m7, m4
      paddw   m2, m5
      paddw   m3, m6
  %endif
  %endmacro
  
  %macro SAD_X4_END 2
  %if mmsize == 8 && %1*%2 == 256
      HADDUW    m0, m4
      HADDUW    m1, m5
      HADDUW    m2, m6
      HADDUW    m3, m7
  %else
      HADDW     m0, m4
      HADDW     m1, m5
      HADDW     m2, m6
      HADDW     m3, m7
  %endif
      mov       r0, r6mp
      movd [r0+ 0], xm0
      movd [r0+ 4], xm1
      movd [r0+ 8], xm2
      movd [r0+12], xm3
      RET
  %endmacro
  
  %macro SAD_X_2xNP 4
      %assign x %3
  %rep %4
      SAD_X%1_ONE x*mmsize, x*mmsize
      SAD_X%1_ONE 2*FENC_STRIDE+x*mmsize, 2*%2+x*mmsize
      %assign x x+1
  %endrep
  %endmacro
  
  %macro PIXEL_VSAD 0
  cglobal pixel_vsad, 3,3,8
      mova      m0, [r0]
      mova      m1, [r0+16]
      mova      m2, [r0+2*r1]
      mova      m3, [r0+2*r1+16]
      lea       r0, [r0+4*r1]
      psubw     m0, m2
      psubw     m1, m3
      ABSW2     m0, m1, m0, m1, m4, m5
      paddw     m0, m1
      sub      r2d, 2
      je .end
  .loop:
      mova      m4, [r0]
      mova      m5, [r0+16]
      mova      m6, [r0+2*r1]
      mova      m7, [r0+2*r1+16]
      lea       r0, [r0+4*r1]
      psubw     m2, m4
      psubw     m3, m5
      psubw     m4, m6
      psubw     m5, m7
      ABSW      m2, m2, m1
      ABSW      m3, m3, m1
      ABSW      m4, m4, m1
      ABSW      m5, m5, m1
      paddw     m0, m2
      paddw     m0, m3
      paddw     m0, m4
      paddw     m0, m5
      mova      m2, m6
      mova      m3, m7
      sub r2d, 2
      jg .loop
  .end:
  %if BIT_DEPTH == 9
      HADDW     m0, m1 ; max sum: 62(pixel diffs)*511(pixel_max)=31682
  %else
      HADDUW    m0, m1 ; max sum: 62(pixel diffs)*1023(pixel_max)=63426
  %endif
      movd     eax, m0
      RET
  %endmacro
  INIT_XMM sse2
  PIXEL_VSAD
  INIT_XMM ssse3
  PIXEL_VSAD
  INIT_XMM xop
  PIXEL_VSAD
  
  INIT_YMM avx2
  cglobal pixel_vsad, 3,3
      mova      m0, [r0]
      mova      m1, [r0+2*r1]
      lea       r0, [r0+4*r1]
      psubw     m0, m1
      pabsw     m0, m0
      sub      r2d, 2
      je .end
  .loop:
      mova      m2, [r0]
      mova      m3, [r0+2*r1]
      lea       r0, [r0+4*r1]
      psubw     m1, m2
      psubw     m2, m3
      pabsw     m1, m1
      pabsw     m2, m2
      paddw     m0, m1
      paddw     m0, m2
      mova      m1, m3
      sub      r2d, 2
      jg .loop
  .end:
  %if BIT_DEPTH == 9
      HADDW     m0, m1
  %else
      HADDUW    m0, m1
  %endif
      movd     eax, xm0
      RET
  
  ;-----------------------------------------------------------------------------
  ; void pixel_sad_xN_WxH( uint16_t *fenc, uint16_t *pix0, uint16_t *pix1,
  ;                        uint16_t *pix2, intptr_t i_stride, int scores[3] )
  ;-----------------------------------------------------------------------------
  %macro SAD_X 3
  cglobal pixel_sad_x%1_%2x%3, 6,7,XMM_REGS
      %assign regnum %1+1
      %xdefine STRIDE r %+ regnum
      mov     r6, %3/2-1
      SAD_X%1_ONE_START
      SAD_X%1_ONE 2*FENC_STRIDE, 2*STRIDE
      SAD_X_2xNP %1, STRIDE, 1, %2/(mmsize/2)-1
  .loop:
      SAD_X%1_INC_P
      SAD_X_2xNP %1, STRIDE, 0, %2/(mmsize/2)
      dec     r6
      jg .loop
  %if %1 == 4
      mov     r6, r6m
  %endif
      SAD_X%1_END %2, %3
  %endmacro
  
  INIT_MMX mmx2
  %define XMM_REGS 0
  SAD_X 3, 16, 16
  SAD_X 3, 16,  8
  SAD_X 3,  8, 16
  SAD_X 3,  8,  8
  SAD_X 3,  8,  4
  SAD_X 3,  4,  8
  SAD_X 3,  4,  4
  SAD_X 4, 16, 16
  SAD_X 4, 16,  8
  SAD_X 4,  8, 16
  SAD_X 4,  8,  8
  SAD_X 4,  8,  4
  SAD_X 4,  4,  8
  SAD_X 4,  4,  4
  INIT_MMX ssse3
  SAD_X 3,  4,  8
  SAD_X 3,  4,  4
  SAD_X 4,  4,  8
  SAD_X 4,  4,  4
  INIT_XMM ssse3
  %define XMM_REGS 7
  SAD_X 3, 16, 16
  SAD_X 3, 16,  8
  SAD_X 3,  8, 16
  SAD_X 3,  8,  8
  SAD_X 3,  8,  4
  %define XMM_REGS 9
  SAD_X 4, 16, 16
  SAD_X 4, 16,  8
  SAD_X 4,  8, 16
  SAD_X 4,  8,  8
  SAD_X 4,  8,  4
  INIT_XMM sse2
  %define XMM_REGS 8
  SAD_X 3, 16, 16
  SAD_X 3, 16,  8
  SAD_X 3,  8, 16
  SAD_X 3,  8,  8
  SAD_X 3,  8,  4
  %define XMM_REGS 11
  SAD_X 4, 16, 16
  SAD_X 4, 16,  8
  SAD_X 4,  8, 16
  SAD_X 4,  8,  8
  SAD_X 4,  8,  4
  INIT_XMM xop
  %define XMM_REGS 7
  SAD_X 3, 16, 16
  SAD_X 3, 16,  8
  SAD_X 3,  8, 16
  SAD_X 3,  8,  8
  SAD_X 3,  8,  4
  %define XMM_REGS 9
  SAD_X 4, 16, 16
  SAD_X 4, 16,  8
  SAD_X 4,  8, 16
  SAD_X 4,  8,  8
  SAD_X 4,  8,  4
  INIT_YMM avx2
  %define XMM_REGS 7
  SAD_X 3, 16, 16
  SAD_X 3, 16,  8
  %define XMM_REGS 9
  SAD_X 4, 16, 16
  SAD_X 4, 16,  8
  
  ;-----------------------------------------------------------------------------
  ; void intra_sad_x3_4x4( uint16_t *fenc, uint16_t *fdec, int res[3] );
  ;-----------------------------------------------------------------------------
  
  %macro INTRA_SAD_X3_4x4 0
  cglobal intra_sad_x3_4x4, 3,3,7
  %if cpuflag(ssse3)
      movddup   m0, [r1-1*FDEC_STRIDEB]
  %else
      movq      m0, [r1-1*FDEC_STRIDEB]
      punpcklqdq m0, m0
  %endif
      movq      m1, [r0+0*FENC_STRIDEB]
      movq      m2, [r0+2*FENC_STRIDEB]
      pshuflw   m6, m0, q1032
      paddw     m6, m0
      pshuflw   m5, m6, q2301
      paddw     m6, m5
      punpcklqdq m6, m6       ; A+B+C+D 8 times
      movhps    m1, [r0+1*FENC_STRIDEB]
      movhps    m2, [r0+3*FENC_STRIDEB]
      psubw     m3, m1, m0
      psubw     m0, m2
      ABSW2     m3, m0, m3, m0, m4, m5
      paddw     m0, m3
      movd      m3, [r1+0*FDEC_STRIDEB-4]
      movd      m4, [r1+2*FDEC_STRIDEB-4]
      movhps    m3, [r1+1*FDEC_STRIDEB-8]
      movhps    m4, [r1+3*FDEC_STRIDEB-8]
      pshufhw   m3, m3, q3333
      pshufhw   m4, m4, q3333
      pshuflw   m3, m3, q1111 ; FF FF EE EE
      pshuflw   m4, m4, q1111 ; HH HH GG GG
      paddw     m5, m3, m4
      paddw     m6, [pw_4]
      paddw     m6, m5
      pshufd    m5, m5, q1032
      paddw     m5, m6
      psrlw     m5, 3
      psubw     m6, m5, m2
      psubw     m5, m1
      psubw     m1, m3
      psubw     m2, m4
      ABSW2     m5, m6, m5, m6, m3, m4
      ABSW2     m1, m2, m1, m2, m3, m4
      paddw     m5, m6
      paddw     m1, m2
  %if cpuflag(ssse3)
      phaddw    m0, m1
      movhlps   m3, m5
      paddw     m5, m3
      phaddw    m0, m5
      pmaddwd   m0, [pw_1]
      mova    [r2], m0
  %else
      HADDW     m0, m3
      HADDW     m1, m3
      HADDW     m5, m3
      movd    [r2], m0 ; V prediction cost
      movd  [r2+4], m1 ; H prediction cost
      movd  [r2+8], m5 ; DC prediction cost
  %endif
      RET
  %endmacro
  
  INIT_XMM sse2
  INTRA_SAD_X3_4x4
  INIT_XMM ssse3
  INTRA_SAD_X3_4x4
  INIT_XMM avx
  INTRA_SAD_X3_4x4
  
  ;-----------------------------------------------------------------------------
  ; void intra_sad_x3_8x8( pixel *fenc, pixel edge[36], int res[3] );
  ;-----------------------------------------------------------------------------
  
  ;m0 = DC
  ;m6 = V
  ;m7 = H
  ;m1 = DC score
  ;m2 = V score
  ;m3 = H score
  ;m5 = temp
  ;m4 = pixel row
  
  %macro INTRA_SAD_HVDC_ITER 2
      mova        m4, [r0+(%1-4)*FENC_STRIDEB]
      psubw       m4, m0
      ABSW        m4, m4, m5
      ACCUM    paddw, 1, 4, %1
      mova        m4, [r0+(%1-4)*FENC_STRIDEB]
      psubw       m4, m6
      ABSW        m4, m4, m5
      ACCUM    paddw, 2, 4, %1
      pshufd      m5, m7, %2
      psubw       m5, [r0+(%1-4)*FENC_STRIDEB]
      ABSW        m5, m5, m4
      ACCUM    paddw, 3, 5, %1
  %endmacro
  
  %macro INTRA_SAD_X3_8x8 0
  cglobal intra_sad_x3_8x8, 3,3,8
      add         r0, 4*FENC_STRIDEB
      movu        m0, [r1+7*SIZEOF_PIXEL]
      mova        m6, [r1+16*SIZEOF_PIXEL] ;V prediction
      mova        m7, m0
      paddw       m0, m6
      punpckhwd   m7, m7
      HADDW       m0, m4
      paddw       m0, [pw_8]
      psrlw       m0, 4
      SPLATW      m0, m0
      INTRA_SAD_HVDC_ITER 0, q3333
      INTRA_SAD_HVDC_ITER 1, q2222
      INTRA_SAD_HVDC_ITER 2, q1111
      INTRA_SAD_HVDC_ITER 3, q0000
      movq        m7, [r1+7*SIZEOF_PIXEL]
      punpcklwd   m7, m7
      INTRA_SAD_HVDC_ITER 4, q3333
      INTRA_SAD_HVDC_ITER 5, q2222
      INTRA_SAD_HVDC_ITER 6, q1111
      INTRA_SAD_HVDC_ITER 7, q0000
  %if cpuflag(ssse3)
      phaddw      m2, m3     ; 2 2 2 2 3 3 3 3
      movhlps     m3, m1
      paddw       m1, m3     ; 1 1 1 1 _ _ _ _
      phaddw      m2, m1     ; 2 2 3 3 1 1 _ _
      pmaddwd     m2, [pw_1] ; 2 3 1 _
      mova      [r2], m2
  %else
      HADDW       m2, m4
      HADDW       m3, m4
      HADDW       m1, m4
      movd    [r2+0], m2
      movd    [r2+4], m3
      movd    [r2+8], m1
  %endif
      RET
  %endmacro
  
  INIT_XMM sse2
  INTRA_SAD_X3_8x8
  INIT_XMM ssse3
  INTRA_SAD_X3_8x8
  
  %macro INTRA_SAD_HVDC_ITER_YMM 2
      mova       xm4, [r0+(%1-4)*FENC_STRIDEB]
      vinserti128 m4, m4, [r0+%1*FENC_STRIDEB], 1
      pshufd      m5, m7, %2
      psubw       m5, m4
      pabsw       m5, m5
      ACCUM    paddw, 2, 5, %1 ; H
      psubw       m5, m4, m6
      psubw       m4, m0
      pabsw       m5, m5
      pabsw       m4, m4
      ACCUM    paddw, 1, 5, %1 ; V
      ACCUM    paddw, 3, 4, %1 ; DC
  %endmacro
  
  INIT_YMM avx2
  cglobal intra_sad_x3_8x8, 3,3,8
      add            r0, 4*FENC_STRIDEB
      movu          xm0, [r1+7*SIZEOF_PIXEL]
      vbroadcasti128 m6, [r1+16*SIZEOF_PIXEL] ; V prediction
      vpermq         m7, m0, q0011
      paddw         xm0, xm6
      paddw         xm0, [pw_1] ; equal to +8 after HADDW
      HADDW         xm0, xm4
      psrld         xm0, 4
      vpbroadcastw   m0, xm0
      punpcklwd      m7, m7
      INTRA_SAD_HVDC_ITER_YMM 0, q3333
      INTRA_SAD_HVDC_ITER_YMM 1, q2222
      INTRA_SAD_HVDC_ITER_YMM 2, q1111
      INTRA_SAD_HVDC_ITER_YMM 3, q0000
      phaddw         m1, m2     ; 1 1 1 1 2 2 2 2 1 1 1 1 2 2 2 2
      punpckhqdq     m2, m3, m3
      paddw          m3, m2     ; 3 3 3 3 _ _ _ _ 3 3 3 3 _ _ _ _
      phaddw         m1, m3     ; 1 1 2 2 3 3 _ _ 1 1 2 2 3 3 _ _
      vextracti128  xm2, m1, 1
      paddw         xm1, xm2    ; 1 1 2 2 3 3 _ _
      pmaddwd       xm1, [pw_1] ; 1 2 3 _
      mova         [r2], xm1
      RET