block/genhd.c: cleanups
[pv_ops_mirror.git] / include / asm-sh / byteorder.h
blob0eb9904b6545be3be0b7a99c6b258c25828fc2fa
1 #ifndef __ASM_SH_BYTEORDER_H
2 #define __ASM_SH_BYTEORDER_H
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>
11 static inline __attribute_const__ __u32 ___arch__swab32(__u32 x)
13 __asm__(
14 #ifdef CONFIG_SUPERH32
15 "swap.b %0, %0\n\t"
16 "swap.w %0, %0\n\t"
17 "swap.b %0, %0"
18 #else
19 "byterev %0, %0\n\t"
20 "shari %0, 32, %0"
21 #endif
22 : "=r" (x)
23 : "0" (x));
25 return x;
28 static inline __attribute_const__ __u16 ___arch__swab16(__u16 x)
30 __asm__(
31 #ifdef CONFIG_SUPERH32
32 "swap.b %0, %0"
33 #else
34 "byterev %0, %0\n\t"
35 "shari %0, 32, %0"
37 #endif
38 : "=r" (x)
39 : "0" (x));
41 return x;
44 static inline __u64 ___arch__swab64(__u64 val)
46 union {
47 struct { __u32 a,b; } s;
48 __u64 u;
49 } v, w;
50 v.u = val;
51 w.s.b = ___arch__swab32(v.s.a);
52 w.s.a = ___arch__swab32(v.s.b);
53 return w.u;
56 #define __arch__swab64(x) ___arch__swab64(x)
57 #define __arch__swab32(x) ___arch__swab32(x)
58 #define __arch__swab16(x) ___arch__swab16(x)
60 #if !defined(__STRICT_ANSI__) || defined(__KERNEL__)
61 # define __BYTEORDER_HAS_U64__
62 # define __SWAB_64_THRU_32__
63 #endif
65 #ifdef __LITTLE_ENDIAN__
66 #include <linux/byteorder/little_endian.h>
67 #else
68 #include <linux/byteorder/big_endian.h>
69 #endif
71 #endif /* __ASM_SH_BYTEORDER_H */