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

   1#ifndef __ASM_SH_SWAB_H
   2#define __ASM_SH_SWAB_H
   3
   4/*
   5 * Copyright (C) 1999  Niibe Yutaka
   6 * Copyright (C) 2000, 2001  Paolo Alberelli
   7 */
   8#include <linux/compiler.h>
   9#include <linux/types.h>
  10#include <asm-generic/swab.h>
  11
  12static inline __attribute_const__ __u32 __arch_swab32(__u32 x)
  13{
  14        __asm__(
  15#ifdef __SH5__
  16                "byterev        %1, %0\n\t"
  17                "shari          %0, 32, %0"
  18#else
  19                "swap.b         %1, %0\n\t"
  20                "swap.w         %0, %0\n\t"
  21                "swap.b         %0, %0"
  22#endif
  23                : "=r" (x)
  24                : "r" (x));
  25
  26        return x;
  27}
  28#define __arch_swab32 __arch_swab32
  29
  30static inline __attribute_const__ __u16 __arch_swab16(__u16 x)
  31{
  32        __asm__(
  33#ifdef __SH5__
  34                "byterev        %1, %0\n\t"
  35                "shari          %0, 32, %0"
  36#else
  37                "swap.b         %1, %0"
  38#endif
  39                : "=r" (x)
  40                :  "r" (x));
  41
  42        return x;
  43}
  44#define __arch_swab16 __arch_swab16
  45
  46static inline __u64 __arch_swab64(__u64 val)
  47{
  48        union {
  49                struct { __u32 a,b; } s;
  50                __u64 u;
  51        } v, w;
  52        v.u = val;
  53        w.s.b = __arch_swab32(v.s.a);
  54        w.s.a = __arch_swab32(v.s.b);
  55        return w.u;
  56}
  57#define __arch_swab64 __arch_swab64
  58
  59#endif /* __ASM_SH_SWAB_H */
  60