diff options
Diffstat (limited to 'arch/sh/include/asm/swab.h')
-rw-r--r-- | arch/sh/include/asm/swab.h | 60 |
1 files changed, 60 insertions, 0 deletions
diff --git a/arch/sh/include/asm/swab.h b/arch/sh/include/asm/swab.h new file mode 100644 index 00000000000..e6931593510 --- /dev/null +++ b/arch/sh/include/asm/swab.h | |||
@@ -0,0 +1,60 @@ | |||
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 | |||
11 | #define __SWAB_64_THRU_32__ | ||
12 | |||
13 | static inline __attribute_const__ __u32 __arch_swab32(__u32 x) | ||
14 | { | ||
15 | __asm__( | ||
16 | #ifdef __SH5__ | ||
17 | "byterev %0, %0\n\t" | ||
18 | "shari %0, 32, %0" | ||
19 | #else | ||
20 | "swap.b %0, %0\n\t" | ||
21 | "swap.w %0, %0\n\t" | ||
22 | "swap.b %0, %0" | ||
23 | #endif | ||
24 | : "=r" (x) | ||
25 | : "0" (x)); | ||
26 | |||
27 | return x; | ||
28 | } | ||
29 | #define __arch_swab32 __arch_swab32 | ||
30 | |||
31 | static inline __attribute_const__ __u16 __arch_swab16(__u16 x) | ||
32 | { | ||
33 | __asm__( | ||
34 | #ifdef __SH5__ | ||
35 | "byterev %0, %0\n\t" | ||
36 | "shari %0, 32, %0" | ||
37 | #else | ||
38 | "swap.b %0, %0" | ||
39 | #endif | ||
40 | : "=r" (x) | ||
41 | : "0" (x)); | ||
42 | |||
43 | return x; | ||
44 | } | ||
45 | #define __arch_swab16 __arch_swab16 | ||
46 | |||
47 | static inline __u64 __arch_swab64(__u64 val) | ||
48 | { | ||
49 | union { | ||
50 | struct { __u32 a,b; } s; | ||
51 | __u64 u; | ||
52 | } v, w; | ||
53 | v.u = val; | ||
54 | w.s.b = __arch_swab32(v.s.a); | ||
55 | w.s.a = __arch_swab32(v.s.b); | ||
56 | return w.u; | ||
57 | } | ||
58 | #define __arch_swab64 __arch_swab64 | ||
59 | |||
60 | #endif /* __ASM_SH_SWAB_H */ | ||