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
__arch_swab32(__u32 x)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
__arch_swab16(__u16 x)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
__arch_swab64(__u64 val)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 */
60