ffmpeg/libavcodec/x86/svq1enc.asm

   1 ;******************************************************************************
   2 ;* SIMD-optimized SVQ1 encoder functions
   3 ;* Copyright (c) 2007 Loren Merritt
   4 ;*
   5 ;* This file is part of FFmpeg.
   6 ;*
   7 ;* FFmpeg is free software; you can redistribute it and/or
   8 ;* modify it under the terms of the GNU Lesser General Public
   9 ;* License as published by the Free Software Foundation; either
  10 ;* version 2.1 of the License, or (at your option) any later version.
  11 ;*
  12 ;* FFmpeg is distributed in the hope that it will be useful,
  13 ;* but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 ;* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15 ;* Lesser General Public License for more details.
  16 ;*
  17 ;* You should have received a copy of the GNU Lesser General Public
  18 ;* License along with FFmpeg; if not, write to the Free Software
  19 ;* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  20 ;******************************************************************************
  21
  22 %include "libavutil/x86/x86util.asm"
  23
  24 SECTION_TEXT
  25
  26 %macro SSD_INT8_VS_INT16 0
  27 cglobal ssd_int8_vs_int16, 3, 3, 3, pix1, pix2, size
  28     pxor m0, m0
  29 .loop
  30     sub       sizeq, 8
  31     movq      m1, [pix1q + sizeq]
  32     mova      m2, [pix2q + sizeq*2]
  33 %if mmsize == 8
  34     movq      m3, [pix2q + sizeq*2 + mmsize]
  35     punpckhbw m4, m1
  36     punpcklbw m1, m1
  37     psraw     m4, 8
  38     psraw     m1, 8
  39     psubw     m3, m4
  40     psubw     m2, m1
  41     pmaddwd   m3, m3
  42     pmaddwd   m2, m2
  43     paddd     m0, m3
  44     paddd     m0, m2
  45 %else
  46     punpcklbw m1, m1
  47     psraw     m1, 8
  48     psubw     m2, m1
  49     pmaddwd   m2, m2
  50     paddd     m0, m2
  51 %endif
  52     jg .loop
  53     HADDD     m0, m1
  54     movd     eax, m0
  55     RET
  56 %endmacro
  57
  58 INIT_MMX mmx
  59 SSD_INT8_VS_INT16
  60 INIT_XMM sse2
  61 SSD_INT8_VS_INT16