LXR linux/arch/powerpc/include/asm/swab.h

   1/*
   2 * This program is free software; you can redistribute it and/or
   3 * modify it under the terms of the GNU General Public License
   4 * as published by the Free Software Foundation; either version
   5 * 2 of the License, or (at your option) any later version.
   6 */
   7#ifndef _ASM_POWERPC_SWAB_H
   8#define _ASM_POWERPC_SWAB_H
   9
  10#include <uapi/asm/swab.h>
  11
  12static __inline__ __u16 ld_le16(const volatile __u16 *addr)
  13{
  14        __u16 val;
  15
  16        __asm__ __volatile__ ("lhbrx %0,0,%1" : "=r" (val) : "r" (addr), "m" (*addr));
  17        return val;
  18}
  19
  20static __inline__ void st_le16(volatile __u16 *addr, const __u16 val)
  21{
  22        __asm__ __volatile__ ("sthbrx %1,0,%2" : "=m" (*addr) : "r" (val), "r" (addr));
  23}
  24
  25static __inline__ __u32 ld_le32(const volatile __u32 *addr)
  26{
  27        __u32 val;
  28
  29        __asm__ __volatile__ ("lwbrx %0,0,%1" : "=r" (val) : "r" (addr), "m" (*addr));
  30        return val;
  31}
  32
  33static __inline__ void st_le32(volatile __u32 *addr, const __u32 val)
  34{
  35        __asm__ __volatile__ ("stwbrx %1,0,%2" : "=m" (*addr) : "r" (val), "r" (addr));
  36}
  37
  38#endif /* _ASM_POWERPC_SWAB_H */
  39