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  1. /*
  2.  * This file is part of FFmpeg.
  3.  *
  4.  * FFmpeg is free software; you can redistribute it and/or
  5.  * modify it under the terms of the GNU Lesser General Public
  6.  * License as published by the Free Software Foundation; either
  7.  * version 2.1 of the License, or (at your option) any later version.
  8.  *
  9.  * FFmpeg is distributed in the hope that it will be useful,
  10.  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11.  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12.  * Lesser General Public License for more details.
  13.  *
  14.  * You should have received a copy of the GNU Lesser General Public
  15.  * License along with FFmpeg; if not, write to the Free Software
  16.  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  17.  */
  18.  
  19. #ifndef AVUTIL_AARCH64_BSWAP_H
  20. #define AVUTIL_AARCH64_BSWAP_H
  21.  
  22. #include <stdint.h>
  23. #include "config.h"
  24. #include "libavutil/attributes.h"
  25.  
  26. #if HAVE_INLINE_ASM
  27.  
  28. #define av_bswap16 av_bswap16
  29. static av_always_inline av_const unsigned av_bswap16(unsigned x)
  30. {
  31.     __asm__("rev16 %w0, %w0" : "+r"(x));
  32.     return x;
  33. }
  34.  
  35. #define av_bswap32 av_bswap32
  36. static av_always_inline av_const uint32_t av_bswap32(uint32_t x)
  37. {
  38.     __asm__("rev %w0, %w0" : "+r"(x));
  39.     return x;
  40. }
  41.  
  42. #define av_bswap64 av_bswap64
  43. static av_always_inline av_const uint64_t av_bswap64(uint64_t x)
  44. {
  45.     __asm__("rev %0, %0" : "+r"(x));
  46.     return x;
  47. }
  48.  
  49. #endif /* HAVE_INLINE_ASM */
  50. #endif /* AVUTIL_AARCH64_BSWAP_H */
  51.