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  1. /*
  2.  * Copyright (c) 2009 Loren Merritt <lorenm@u.washington.edu>
  3.  *
  4.  * This file is part of FFmpeg.
  5.  *
  6.  * FFmpeg is free software; you can redistribute it and/or
  7.  * modify it under the terms of the GNU Lesser General Public
  8.  * License as published by the Free Software Foundation; either
  9.  * version 2.1 of the License, or (at your option) any later version.
  10.  *
  11.  * FFmpeg is distributed in the hope that it will be useful,
  12.  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13.  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14.  * Lesser General Public License for more details.
  15.  *
  16.  * You should have received a copy of the GNU Lesser General Public
  17.  * License along with FFmpeg; if not, write to the Free Software
  18.  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  19.  */
  20.  
  21. #include "config.h"
  22. #include "libavutil/x86/asm.h"
  23. #include "dsputil_x86.h"
  24.  
  25. #if HAVE_INLINE_ASM
  26.  
  27. #if HAVE_7REGS
  28. void ff_add_hfyu_median_prediction_cmov(uint8_t *dst, const uint8_t *top,
  29.                                         const uint8_t *diff, int w,
  30.                                         int *left, int *left_top)
  31. {
  32.     x86_reg w2 = -w;
  33.     x86_reg x;
  34.     int l  = *left     & 0xff;
  35.     int tl = *left_top & 0xff;
  36.     int t;
  37.     __asm__ volatile (
  38.         "mov          %7, %3            \n"
  39.         "1:                             \n"
  40.         "movzbl (%3, %4), %2            \n"
  41.         "mov          %2, %k3           \n"
  42.         "sub         %b1, %b3           \n"
  43.         "add         %b0, %b3           \n"
  44.         "mov          %2, %1            \n"
  45.         "cmp          %0, %2            \n"
  46.         "cmovg        %0, %2            \n"
  47.         "cmovg        %1, %0            \n"
  48.         "cmp         %k3, %0            \n"
  49.         "cmovg       %k3, %0            \n"
  50.         "mov          %7, %3            \n"
  51.         "cmp          %2, %0            \n"
  52.         "cmovl        %2, %0            \n"
  53.         "add    (%6, %4), %b0           \n"
  54.         "mov         %b0, (%5, %4)      \n"
  55.         "inc          %4                \n"
  56.         "jl           1b                \n"
  57.         : "+&q"(l), "+&q"(tl), "=&r"(t), "=&q"(x), "+&r"(w2)
  58.         : "r"(dst + w), "r"(diff + w), "rm"(top + w)
  59.     );
  60.     *left     = l;
  61.     *left_top = tl;
  62. }
  63. #endif
  64.  
  65. #endif /* HAVE_INLINE_ASM */
  66.