sys/arch/sh3/include/byte_swap.h

   1 /*      $NetBSD: byte_swap.h,v 1.3 2006/02/16 20:17:15 perry Exp $      */
   2
   3 /* Written by Manuel Bouyer. Public domain */
   4
   5 #ifndef _SH3_BYTE_SWAP_H_
   6 #define _SH3_BYTE_SWAP_H_
   7
   8 #include <sys/cdefs.h>
   9
  10 #ifdef  __GNUC__
  11 #include <sys/types.h>
  12 __BEGIN_DECLS
  13
  14 #define __BYTE_SWAP_U16_VARIABLE __byte_swap_u16_variable
  15 static __inline uint16_t
  16 __byte_swap_u16_variable(uint16_t x)
  17 {
  18         uint16_t rval;
  19
  20         __asm volatile ("swap.b %1,%0" : "=r"(rval) : "r"(x));
  21
  22         return (rval);
  23 }
  24
  25 #define __BYTE_SWAP_U32_VARIABLE __byte_swap_u32_variable
  26 static __inline uint32_t
  27 __byte_swap_u32_variable(uint32_t x)
  28 {
  29         uint32_t rval;
  30
  31         __asm volatile ("swap.b %1,%0; swap.w %0,%0; swap.b %0,%0"
  32                           : "=r"(rval) : "r"(x));
  33
  34         return (rval);
  35 }
  36
  37 __END_DECLS
  38 #endif /* __GNUC_ */
  39
  40 #endif /* !_SH3_BYPE_SWAP_H_ */