include/asm-sh/byteorder.h

   1 #ifndef __ASM_SH_BYTEORDER_H
   2 #define __ASM_SH_BYTEORDER_H
   3
   4 /*
   5  * Copyright (C) 1999  Niibe Yutaka
   6  */
   7
   8 #include <asm/types.h>
   9 #include <linux/compiler.h>
  10
  11 static __inline__ __attribute_const__ __u32 ___arch__swab32(__u32 x)
  12 {
  13         __asm__("swap.b %0, %0\n\t"
  14                 "swap.w %0, %0\n\t"
  15                 "swap.b %0, %0"
  16                 : "=r" (x)
  17                 : "0" (x));
  18         return x;
  19 }
  20
  21 static __inline__ __attribute_const__ __u16 ___arch__swab16(__u16 x)
  22 {
  23         __asm__("swap.b %0, %0"
  24                 : "=r" (x)
  25                 :  "0" (x));
  26         return x;
  27 }
  28
  29 static inline __u64 ___arch__swab64(__u64 val)
  30 {
  31         union {
  32                 struct { __u32 a,b; } s;
  33                 __u64 u;
  34         } v, w;
  35         v.u = val;
  36         w.s.b = ___arch__swab32(v.s.a);
  37         w.s.a = ___arch__swab32(v.s.b);
  38         return w.u;
  39 }
  40
  41 #define __arch__swab64(x) ___arch__swab64(x)
  42 #define __arch__swab32(x) ___arch__swab32(x)
  43 #define __arch__swab16(x) ___arch__swab16(x)
  44
  45 #if !defined(__STRICT_ANSI__) || defined(__KERNEL__)
  46 #  define __BYTEORDER_HAS_U64__
  47 #  define __SWAB_64_THRU_32__
  48 #endif
  49
  50 #ifdef __LITTLE_ENDIAN__
  51 #include <linux/byteorder/little_endian.h>
  52 #else
  53 #include <linux/byteorder/big_endian.h>
  54 #endif
  55
  56 #endif /* __ASM_SH_BYTEORDER_H */