arch/sh/include/asm/byteorder.h

   1 #ifndef __ASM_SH_BYTEORDER_H
   2 #define __ASM_SH_BYTEORDER_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
  11 #ifdef __LITTLE_ENDIAN__
  12 # define __LITTLE_ENDIAN
  13 #else
  14 # define __BIG_ENDIAN
  15 #endif
  16
  17 #define __SWAB_64_THRU_32__
  18
  19 static inline __attribute_const__ __u32 __arch_swab32(__u32 x)
  20 {
  21         __asm__(
  22 #ifdef __SH5__
  23                 "byterev        %0, %0\n\t"
  24                 "shari          %0, 32, %0"
  25 #else
  26                 "swap.b         %0, %0\n\t"
  27                 "swap.w         %0, %0\n\t"
  28                 "swap.b         %0, %0"
  29 #endif
  30                 : "=r" (x)
  31                 : "0" (x));
  32
  33         return x;
  34 }
  35 #define __arch_swab32 __arch_swab32
  36
  37 static inline __attribute_const__ __u16 __arch_swab16(__u16 x)
  38 {
  39         __asm__(
  40 #ifdef __SH5__
  41                 "byterev        %0, %0\n\t"
  42                 "shari          %0, 32, %0"
  43 #else
  44                 "swap.b         %0, %0"
  45 #endif
  46                 : "=r" (x)
  47                 :  "0" (x));
  48
  49         return x;
  50 }
  51 #define __arch_swab16 __arch_swab16
  52
  53 static inline __u64 __arch_swab64(__u64 val)
  54 {
  55         union {
  56                 struct { __u32 a,b; } s;
  57                 __u64 u;
  58         } v, w;
  59         v.u = val;
  60         w.s.b = __arch_swab32(v.s.a);
  61         w.s.a = __arch_swab32(v.s.b);
  62         return w.u;
  63 }
  64 #define __arch_swab64 __arch_swab64
  65
  66 #include <linux/byteorder.h>
  67
  68 #endif /* __ASM_SH_BYTEORDER_H */