Merge branch 'for-rmk/samsung6' of git://git.fluff.org/bjdooks/linux into devel-stable
[linux-2.6.git] / 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
12 static 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
30 static 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
46 static 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 */