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ffmpeg-4.2.2/libavcodec/x86/fpel.asm 2.7 KB
aac5773f   hucm   功能基本完成,接口待打磨
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  ;******************************************************************************
  ;* SIMD-optimized fullpel functions
  ;* Copyright (c) 2008 Loren Merritt
  ;* Copyright (c) 2003-2013 Michael Niedermayer
  ;* Copyright (c) 2013 Daniel Kang
  ;*
  ;* 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/x86/x86util.asm"
  
  SECTION .text
  
  %macro PAVGB_MMX 4
      LOAD   %3, %1
      por    %3, %2
      pxor   %2, %1
      pand   %2, %4
      psrlq  %2, 1
      psubb  %3, %2
      SWAP   %2, %3
  %endmacro
  
  ; void ff_put/avg_pixels(uint8_t *block, const uint8_t *pixels,
  ;                        ptrdiff_t line_size, int h)
  %macro OP_PIXELS 2
  %if %2 == mmsize/2
  %define LOAD movh
  %define SAVE movh
  %define LEN  mmsize
  %else
  %define LOAD movu
  %define SAVE mova
  %define LEN  %2
  %endif
  cglobal %1_pixels%2, 4,5,4
      lea          r4, [r2*3]
  %ifidn %1, avg
  %if notcpuflag(mmxext)
      pcmpeqd      m6, m6
      paddb        m6, m6
  %endif
  %endif
  .loop:
  %assign %%i 0
  %rep LEN/mmsize
      LOAD         m0, [r1 + %%i]
      LOAD         m1, [r1+r2 + %%i]
      LOAD         m2, [r1+r2*2 + %%i]
      LOAD         m3, [r1+r4 + %%i]
  %ifidn %1, avg
  %if notcpuflag(mmxext)
      PAVGB_MMX    [r0 + %%i], m0, m4, m6
      PAVGB_MMX    [r0+r2 + %%i], m1, m5, m6
      PAVGB_MMX    [r0+r2*2 + %%i], m2, m4, m6
      PAVGB_MMX    [r0+r4 + %%i], m3, m5, m6
  %else
      pavgb        m0, [r0 + %%i]
      pavgb        m1, [r0+r2 + %%i]
      pavgb        m2, [r0+r2*2 + %%i]
      pavgb        m3, [r0+r4 + %%i]
  %endif
  %endif
      SAVE       [r0 + %%i], m0
      SAVE    [r0+r2 + %%i], m1
      SAVE  [r0+r2*2 + %%i], m2
      SAVE    [r0+r4 + %%i], m3
  %assign %%i %%i+mmsize
  %endrep
      sub         r3d, 4
      lea          r1, [r1+r2*4]
      lea          r0, [r0+r2*4]
      jne       .loop
      RET
  %endmacro
  
  INIT_MMX mmx
  OP_PIXELS put, 4
  OP_PIXELS avg, 4
  OP_PIXELS put, 8
  OP_PIXELS avg, 8
  OP_PIXELS put, 16
  OP_PIXELS avg, 16
  
  INIT_MMX mmxext
  OP_PIXELS avg, 4
  OP_PIXELS avg, 8
  OP_PIXELS avg, 16
  
  INIT_XMM sse2
  OP_PIXELS put, 16
  OP_PIXELS avg, 16