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  1. /*
  2.  * DSP utils : QNS functions are compiled 3 times for mmx/3dnow/ssse3
  3.  * Copyright (c) 2004 Michael Niedermayer
  4.  *
  5.  * MMX optimization by Michael Niedermayer <michaelni@gmx.at>
  6.  * 3DNow! and SSSE3 optimization by Zuxy Meng <zuxy.meng@gmail.com>
  7.  *
  8.  * This file is part of FFmpeg.
  9.  *
  10.  * FFmpeg is free software; you can redistribute it and/or
  11.  * modify it under the terms of the GNU Lesser General Public
  12.  * License as published by the Free Software Foundation; either
  13.  * version 2.1 of the License, or (at your option) any later version.
  14.  *
  15.  * FFmpeg is distributed in the hope that it will be useful,
  16.  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17.  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  18.  * Lesser General Public License for more details.
  19.  *
  20.  * You should have received a copy of the GNU Lesser General Public
  21.  * License along with FFmpeg; if not, write to the Free Software
  22.  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  23.  */
  24.  
  25. #define MAX_ABS (512 >> (SCALE_OFFSET>0 ? SCALE_OFFSET : 0))
  26.  
  27. static int DEF(try_8x8basis)(int16_t rem[64], int16_t weight[64], int16_t basis[64], int scale)
  28. {
  29.     x86_reg i=0;
  30.  
  31.     av_assert2(FFABS(scale) < MAX_ABS);
  32.     scale<<= 16 + SCALE_OFFSET - BASIS_SHIFT + RECON_SHIFT;
  33.  
  34.     SET_RND(mm6);
  35.     __asm__ volatile(
  36.         "pxor %%mm7, %%mm7              \n\t"
  37.         "movd  %4, %%mm5                \n\t"
  38.         "punpcklwd %%mm5, %%mm5         \n\t"
  39.         "punpcklwd %%mm5, %%mm5         \n\t"
  40.         ".p2align 4                     \n\t"
  41.         "1:                             \n\t"
  42.         "movq  (%1, %0), %%mm0          \n\t"
  43.         "movq  8(%1, %0), %%mm1         \n\t"
  44.         PMULHRW(%%mm0, %%mm1, %%mm5, %%mm6)
  45.         "paddw (%2, %0), %%mm0          \n\t"
  46.         "paddw 8(%2, %0), %%mm1         \n\t"
  47.         "psraw $6, %%mm0                \n\t"
  48.         "psraw $6, %%mm1                \n\t"
  49.         "pmullw (%3, %0), %%mm0         \n\t"
  50.         "pmullw 8(%3, %0), %%mm1        \n\t"
  51.         "pmaddwd %%mm0, %%mm0           \n\t"
  52.         "pmaddwd %%mm1, %%mm1           \n\t"
  53.         "paddd %%mm1, %%mm0             \n\t"
  54.         "psrld $4, %%mm0                \n\t"
  55.         "paddd %%mm0, %%mm7             \n\t"
  56.         "add $16, %0                    \n\t"
  57.         "cmp $128, %0                   \n\t" //FIXME optimize & bench
  58.         " jb 1b                         \n\t"
  59.         PHADDD(%%mm7, %%mm6)
  60.         "psrld $2, %%mm7                \n\t"
  61.         "movd %%mm7, %0                 \n\t"
  62.  
  63.         : "+r" (i)
  64.         : "r"(basis), "r"(rem), "r"(weight), "g"(scale)
  65.     );
  66.     return i;
  67. }
  68.  
  69. static void DEF(add_8x8basis)(int16_t rem[64], int16_t basis[64], int scale)
  70. {
  71.     x86_reg i=0;
  72.  
  73.     if(FFABS(scale) < MAX_ABS){
  74.         scale<<= 16 + SCALE_OFFSET - BASIS_SHIFT + RECON_SHIFT;
  75.         SET_RND(mm6);
  76.         __asm__ volatile(
  77.                 "movd  %3, %%mm5        \n\t"
  78.                 "punpcklwd %%mm5, %%mm5 \n\t"
  79.                 "punpcklwd %%mm5, %%mm5 \n\t"
  80.                 ".p2align 4             \n\t"
  81.                 "1:                     \n\t"
  82.                 "movq  (%1, %0), %%mm0  \n\t"
  83.                 "movq  8(%1, %0), %%mm1 \n\t"
  84.                 PMULHRW(%%mm0, %%mm1, %%mm5, %%mm6)
  85.                 "paddw (%2, %0), %%mm0  \n\t"
  86.                 "paddw 8(%2, %0), %%mm1 \n\t"
  87.                 "movq %%mm0, (%2, %0)   \n\t"
  88.                 "movq %%mm1, 8(%2, %0)  \n\t"
  89.                 "add $16, %0            \n\t"
  90.                 "cmp $128, %0           \n\t" // FIXME optimize & bench
  91.                 " jb 1b                 \n\t"
  92.  
  93.                 : "+r" (i)
  94.                 : "r"(basis), "r"(rem), "g"(scale)
  95.         );
  96.     }else{
  97.         for(i=0; i<8*8; i++){
  98.             rem[i] += (basis[i]*scale + (1<<(BASIS_SHIFT - RECON_SHIFT-1)))>>(BASIS_SHIFT - RECON_SHIFT);
  99.         }
  100.     }
  101. }
  102.