bswap.h 1.3 KB

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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. * @file
  20. * byte swapping routines
  21. */
  22. #ifndef AVUTIL_SH4_BSWAP_H
  23. #define AVUTIL_SH4_BSWAP_H
  24. #include <stdint.h>
  25. #include "config.h"
  26. #include "libavutil/attributes.h"
  27. #define av_bswap16 av_bswap16
  28. static av_always_inline av_const uint16_t av_bswap16(uint16_t x)
  29. {
  30. __asm__("swap.b %0,%0" : "+r"(x));
  31. return x;
  32. }
  33. #define av_bswap32 av_bswap32
  34. static av_always_inline av_const uint32_t av_bswap32(uint32_t x)
  35. {
  36. __asm__("swap.b %0,%0\n"
  37. "swap.w %0,%0\n"
  38. "swap.b %0,%0\n"
  39. : "+r"(x));
  40. return x;
  41. }
  42. #endif /* AVUTIL_SH4_BSWAP_H */