common/lib/libc/gen/bswap32.c

   1 /*  $NetBSD: bswap32.c,v 1.3 2011/07/04 21:20:27 joerg Exp $    */
   2
   3 /*
   4  * Written by Manuel Bouyer <bouyer@NetBSD.org>.
   5  * Public domain.
   6  */
   7
   8 #include <sys/cdefs.h>
   9 #if defined(LIBC_SCCS) && !defined(lint)
  10 __RCSID("$NetBSD: bswap32.c,v 1.3 2011/07/04 21:20:27 joerg Exp $");
  11 #endif /* LIBC_SCCS and not lint */
  12
  13 #include <sys/types.h>
  14 #include <machine/bswap.h>
  15
  16 #undef bswap32
  17
  18 uint32_t
  19 bswap32(uint32_t x)
  20 {
  21         return  ((x << 24) & 0xff000000 ) |
  22                 ((x <<  8) & 0x00ff0000 ) |
  23                 ((x >>  8) & 0x0000ff00 ) |
  24                 ((x >> 24) & 0x000000ff );
  25 }