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acbbbe9f TG |
1 | #ifndef _ASM_X86_BYTEORDER_H |
2 | #define _ASM_X86_BYTEORDER_H | |
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 | ||
81 | #endif /* _ASM_X86_BYTEORDER_H */ |