projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 1965aae3 PA |
1 | #ifndef _ASM_X86_BYTEORDER_H |
| 2 | #define _ASM_X86_BYTEORDER_H | |
| acbbbe9f TG |
3 | |
| 4 | #include <asm/types.h> | |
| 5 | #include <linux/compiler.h> | |
| 6 | ||
| ad38dab0 | 7 | #define __LITTLE_ENDIAN |
| acbbbe9f | 8 | |
| ad38dab0 | 9 | static inline __attribute_const__ __u32 __arch_swab32(__u32 val) |
| acbbbe9f | 10 | { |
| ad38dab0 HH |
11 | #ifdef __i386__ |
| 12 | # ifdef CONFIG_X86_BSWAP | |
| 13 | asm("bswap %0" : "=r" (val) : "0" (val)); | |
| 14 | # else | |
| 34605095 JP |
15 | asm("xchgb %b0,%h0\n\t" /* swap lower bytes */ |
| 16 | "rorl $16,%0\n\t" /* swap words */ | |
| 17 | "xchgb %b0,%h0" /* swap higher bytes */ | |
| ad38dab0 HH |
18 | : "=q" (val) |
| 19 | : "0" (val)); | |
| 20 | # endif | |
| 21 | ||
| 22 | #else /* __i386__ */ | |
| 23 | asm("bswapl %0" | |
| 24 | : "=r" (val) | |
| 25 | : "0" (val)); | |
| 96a388de | 26 | #endif |
| ad38dab0 | 27 | return val; |
| acbbbe9f | 28 | } |
| ad38dab0 | 29 | #define __arch_swab32 __arch_swab32 |
| acbbbe9f | 30 | |
| ad38dab0 | 31 | static inline __attribute_const__ __u64 __arch_swab64(__u64 val) |
| acbbbe9f | 32 | { |
| ad38dab0 | 33 | #ifdef __i386__ |
| acbbbe9f | 34 | union { |
| 34605095 JP |
35 | struct { |
| 36 | __u32 a; | |
| 37 | __u32 b; | |
| 38 | } s; | |
| acbbbe9f TG |
39 | __u64 u; |
| 40 | } v; | |
| 41 | v.u = val; | |
| ad38dab0 | 42 | # ifdef CONFIG_X86_BSWAP |
| 34605095 | 43 | asm("bswapl %0 ; bswapl %1 ; xchgl %0,%1" |
| acbbbe9f TG |
44 | : "=r" (v.s.a), "=r" (v.s.b) |
| 45 | : "0" (v.s.a), "1" (v.s.b)); | |
| ad38dab0 HH |
46 | # else |
| 47 | v.s.a = __arch_swab32(v.s.a); | |
| 48 | v.s.b = __arch_swab32(v.s.b); | |
| 34605095 JP |
49 | asm("xchgl %0,%1" |
| 50 | : "=r" (v.s.a), "=r" (v.s.b) | |
| 51 | : "0" (v.s.a), "1" (v.s.b)); | |
| ad38dab0 | 52 | # endif |
| acbbbe9f | 53 | return v.u; |
| acbbbe9f | 54 | #else /* __i386__ */ |
| 34605095 | 55 | asm("bswapq %0" |
| ad38dab0 HH |
56 | : "=r" (val) |
| 57 | : "0" (val)); | |
| 58 | return val; | |
| acbbbe9f | 59 | #endif |
| ad38dab0 HH |
60 | } |
| 61 | #define __arch_swab64 __arch_swab64 | |
| acbbbe9f | 62 | |
| ad38dab0 | 63 | #include <linux/byteorder.h> |
| acbbbe9f | 64 | |
| 1965aae3 | 65 | #endif /* _ASM_X86_BYTEORDER_H */ |