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 | ||
| 7 | #ifdef __GNUC__ | |
| 8 | ||
| 9 | #ifdef __i386__ | |
| 10 | ||
| 34605095 | 11 | static inline __attribute_const__ __u32 ___arch__swab32(__u32 x) |
| acbbbe9f TG |
12 | { |
| 13 | #ifdef CONFIG_X86_BSWAP | |
| 34605095 | 14 | asm("bswap %0" : "=r" (x) : "0" (x)); |
| 96a388de | 15 | #else |
| 34605095 JP |
16 | asm("xchgb %b0,%h0\n\t" /* swap lower bytes */ |
| 17 | "rorl $16,%0\n\t" /* swap words */ | |
| 18 | "xchgb %b0,%h0" /* swap higher bytes */ | |
| 19 | : "=q" (x) | |
| 20 | : "0" (x)); | |
| 96a388de | 21 | #endif |
| acbbbe9f TG |
22 | return x; |
| 23 | } | |
| 24 | ||
| 34605095 | 25 | static inline __attribute_const__ __u64 ___arch__swab64(__u64 val) |
| acbbbe9f TG |
26 | { |
| 27 | union { | |
| 34605095 JP |
28 | struct { |
| 29 | __u32 a; | |
| 30 | __u32 b; | |
| 31 | } s; | |
| acbbbe9f TG |
32 | __u64 u; |
| 33 | } v; | |
| 34 | v.u = val; | |
| 35 | #ifdef CONFIG_X86_BSWAP | |
| 34605095 | 36 | asm("bswapl %0 ; bswapl %1 ; xchgl %0,%1" |
| acbbbe9f TG |
37 | : "=r" (v.s.a), "=r" (v.s.b) |
| 38 | : "0" (v.s.a), "1" (v.s.b)); | |
| 39 | #else | |
| 40 | v.s.a = ___arch__swab32(v.s.a); | |
| 41 | v.s.b = ___arch__swab32(v.s.b); | |
| 34605095 JP |
42 | asm("xchgl %0,%1" |
| 43 | : "=r" (v.s.a), "=r" (v.s.b) | |
| 44 | : "0" (v.s.a), "1" (v.s.b)); | |
| acbbbe9f TG |
45 | #endif |
| 46 | return v.u; | |
| 47 | } | |
| 48 | ||
| 49 | #else /* __i386__ */ | |
| 50 | ||
| 34605095 | 51 | static inline __attribute_const__ __u64 ___arch__swab64(__u64 x) |
| acbbbe9f | 52 | { |
| 34605095 JP |
53 | asm("bswapq %0" |
| 54 | : "=r" (x) | |
| 55 | : "0" (x)); | |
| acbbbe9f TG |
56 | return x; |
| 57 | } | |
| 58 | ||
| 34605095 | 59 | static inline __attribute_const__ __u32 ___arch__swab32(__u32 x) |
| acbbbe9f | 60 | { |
| 34605095 JP |
61 | asm("bswapl %0" |
| 62 | : "=r" (x) | |
| 63 | : "0" (x)); | |
| acbbbe9f TG |
64 | return x; |
| 65 | } | |
| 66 | ||
| 67 | #endif | |
| 68 | ||
| 69 | /* Do not define swab16. Gcc is smart enough to recognize "C" version and | |
| 70 | convert it into rotation or exhange. */ | |
| 71 | ||
| 72 | #define __arch__swab64(x) ___arch__swab64(x) | |
| 73 | #define __arch__swab32(x) ___arch__swab32(x) | |
| 74 | ||
| 75 | #define __BYTEORDER_HAS_U64__ | |
| 76 | ||
| 77 | #endif /* __GNUC__ */ | |
| 78 | ||
| 79 | #include <linux/byteorder/little_endian.h> | |
| 80 | ||
| 1965aae3 | 81 | #endif /* _ASM_X86_BYTEORDER_H */ |