byteswap.h 1.3 KB

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  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, write to the Free
  14. Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  15. 02111-1307 USA. */
  16. #ifndef _ASM_BITS_BYTESWAP_H
  17. #define _ASM_BITS_BYTESWAP_H 1
  18. #if !defined __mcoldfire__
  19. # define __bswap_non_constant_32(x) \
  20. __extension__ \
  21. ({ unsigned int __bswap_32_v; \
  22. __asm__ __volatile__ ("ror%.w %#8, %0;" \
  23. "swap %0;" \
  24. "ror%.w %#8, %0" \
  25. : "=d" (__bswap_32_v) \
  26. : "0" ((unsigned int) (x))); \
  27. __bswap_32_v; })
  28. #endif
  29. #endif
  30. #include <bits/byteswap-common.h>