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  1. /*
  2.  * Copyright (C) 2007 Marc Hoffman
  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. /**
  22.  * @file
  23.  * byte swapping routines
  24.  */
  25.  
  26. #ifndef AVUTIL_BFIN_BSWAP_H
  27. #define AVUTIL_BFIN_BSWAP_H
  28.  
  29. #include <stdint.h>
  30. #include "config.h"
  31. #include "libavutil/attributes.h"
  32.  
  33. #define av_bswap32 av_bswap32
  34. static av_always_inline av_const uint32_t av_bswap32(uint32_t x)
  35. {
  36.     unsigned tmp;
  37.     __asm__("%1 = %0 >> 8 (V);      \n\t"
  38.             "%0 = %0 << 8 (V);      \n\t"
  39.             "%0 = %0 | %1;          \n\t"
  40.             "%0 = PACK(%0.L, %0.H); \n\t"
  41.             : "+d"(x), "=&d"(tmp));
  42.     return x;
  43. }
  44.  
  45. #endif /* AVUTIL_BFIN_BSWAP_H */
  46.