Merge branch 'for-2.6.30' into for-2.6.31
[pandora-kernel.git] / arch / blackfin / include / asm / swab.h
1 #ifndef _BLACKFIN_SWAB_H
2 #define _BLACKFIN_SWAB_H
3
4 #include <linux/types.h>
5 #include <linux/compiler.h>
6
7 #if defined(__GNUC__) && !defined(__STRICT_ANSI__) || defined(__KERNEL__)
8 #  define __SWAB_64_THRU_32__
9 #endif
10
11 #ifdef __GNUC__
12
13 static __inline__ __attribute_const__ __u32 __arch_swahb32(__u32 xx)
14 {
15         __u32 tmp;
16         __asm__("%1 = %0 >> 8 (V);\n\t"
17                 "%0 = %0 << 8 (V);\n\t"
18                 "%0 = %0 | %1;\n\t"
19                 : "+d"(xx), "=&d"(tmp));
20         return xx;
21 }
22 #define __arch_swahb32 __arch_swahb32
23
24 static __inline__ __attribute_const__ __u32 __arch_swahw32(__u32 xx)
25 {
26         __u32 rv;
27         __asm__("%0 = PACK(%1.L, %1.H);\n\t": "=d"(rv): "d"(xx));
28         return rv;
29 }
30 #define __arch_swahw32 __arch_swahw32
31
32 static __inline__ __attribute_const__ __u32 __arch_swab32(__u32 xx)
33 {
34         return __arch_swahb32(__arch_swahw32(xx));
35 }
36 #define __arch_swab32 __arch_swab32
37
38 static __inline__ __attribute_const__ __u16 __arch_swab16(__u16 xx)
39 {
40         __u32 xw = xx;
41         __asm__("%0 <<= 8;\n    %0.L = %0.L + %0.H (NS);\n": "+d"(xw));
42         return (__u16)xw;
43 }
44 #define __arch_swab16 __arch_swab16
45
46 #endif /* __GNUC__ */
47
48 #endif                          /* _BLACKFIN_SWAB_H */