byteswap.h 1.3 KB

123456789101112131415161718192021222324252627282930313233343536
  1. /* Macros to swap the order of bytes in integer values. m68k version.
  2. Copyright (C) 1997, 2002 Free Software Foundation, Inc.
  3. This file is part of the GNU C Library.
  4. The GNU C Library 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. The GNU C Library is distributed in the hope that it will be useful,
  9. but WITHOUT ANY WARRANTY; without even the implied warranty of
  10. MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  11. Lesser General Public License for more details.
  12. You should have received a copy of the GNU Lesser General Public
  13. License along with the GNU C Library; if not, see
  14. <http://www.gnu.org/licenses/>. */
  15. #ifndef _ASM_BITS_BYTESWAP_H
  16. #define _ASM_BITS_BYTESWAP_H 1
  17. #if !defined __mcoldfire__
  18. # define __bswap_non_constant_32(x) \
  19. __extension__ \
  20. ({ unsigned int __bswap_32_v; \
  21. __asm__ __volatile__ ("ror%.w %#8, %0;" \
  22. "swap %0;" \
  23. "ror%.w %#8, %0" \
  24. : "=d" (__bswap_32_v) \
  25. : "0" ((unsigned int) (x))); \
  26. __bswap_32_v; })
  27. #endif
  28. #endif
  29. #include <bits/byteswap-common.h>