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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 5270 | serge | 1 | #ifndef _ASM_X86_SWAB_H |
| 2 | #define _ASM_X86_SWAB_H |
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| 3 | |||
| 4 | #include |
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| 5 | #include |
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| 6 | |||
| 7 | static inline __attribute_const__ __u32 __arch_swab32(__u32 val) |
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| 8 | { |
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| 9 | #ifdef __i386__ |
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| 10 | # ifdef CONFIG_X86_BSWAP |
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| 11 | asm("bswap %0" : "=r" (val) : "0" (val)); |
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| 12 | # else |
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| 13 | asm("xchgb %b0,%h0\n\t" /* swap lower bytes */ |
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| 14 | "rorl $16,%0\n\t" /* swap words */ |
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| 15 | "xchgb %b0,%h0" /* swap higher bytes */ |
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| 16 | : "=q" (val) |
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| 17 | : "0" (val)); |
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| 18 | # endif |
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| 19 | |||
| 20 | #else /* __i386__ */ |
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| 21 | asm("bswapl %0" |
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| 22 | : "=r" (val) |
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| 23 | : "0" (val)); |
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| 24 | #endif |
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| 25 | return val; |
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| 26 | } |
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| 27 | #define __arch_swab32 __arch_swab32 |
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| 28 | |||
| 29 | static inline __attribute_const__ __u64 __arch_swab64(__u64 val) |
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| 30 | { |
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| 31 | #ifdef __i386__ |
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| 32 | union { |
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| 33 | struct { |
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| 34 | __u32 a; |
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| 35 | __u32 b; |
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| 36 | } s; |
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| 37 | __u64 u; |
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| 38 | } v; |
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| 39 | v.u = val; |
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| 40 | # ifdef CONFIG_X86_BSWAP |
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| 41 | asm("bswapl %0 ; bswapl %1 ; xchgl %0,%1" |
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| 42 | : "=r" (v.s.a), "=r" (v.s.b) |
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| 43 | : "0" (v.s.a), "1" (v.s.b)); |
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| 44 | # else |
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| 45 | v.s.a = __arch_swab32(v.s.a); |
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| 46 | v.s.b = __arch_swab32(v.s.b); |
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| 47 | asm("xchgl %0,%1" |
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| 48 | : "=r" (v.s.a), "=r" (v.s.b) |
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| 49 | : "0" (v.s.a), "1" (v.s.b)); |
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| 50 | # endif |
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| 51 | return v.u; |
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| 52 | #else /* __i386__ */ |
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| 53 | asm("bswapq %0" |
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| 54 | : "=r" (val) |
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| 55 | : "0" (val)); |
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| 56 | return val; |
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| 57 | #endif |
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| 58 | } |
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| 59 | #define __arch_swab64 __arch_swab64 |
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| 60 | |||
| 61 | #endif /* _ASM_X86_SWAB_H */ |