diff options
-rw-r--r-- | arch/x86/include/asm/byteorder.h | 74 |
1 files changed, 29 insertions, 45 deletions
diff --git a/arch/x86/include/asm/byteorder.h b/arch/x86/include/asm/byteorder.h index e02ae2d89acf..f110ad417df3 100644 --- a/arch/x86/include/asm/byteorder.h +++ b/arch/x86/include/asm/byteorder.h | |||
@@ -4,26 +4,33 @@ | |||
4 | #include <asm/types.h> | 4 | #include <asm/types.h> |
5 | #include <linux/compiler.h> | 5 | #include <linux/compiler.h> |
6 | 6 | ||
7 | #ifdef __GNUC__ | 7 | #define __LITTLE_ENDIAN |
8 | 8 | ||
9 | #ifdef __i386__ | 9 | static inline __attribute_const__ __u32 __arch_swab32(__u32 val) |
10 | |||
11 | static inline __attribute_const__ __u32 ___arch__swab32(__u32 x) | ||
12 | { | 10 | { |
13 | #ifdef CONFIG_X86_BSWAP | 11 | #ifdef __i386__ |
14 | asm("bswap %0" : "=r" (x) : "0" (x)); | 12 | # ifdef CONFIG_X86_BSWAP |
15 | #else | 13 | asm("bswap %0" : "=r" (val) : "0" (val)); |
14 | # else | ||
16 | asm("xchgb %b0,%h0\n\t" /* swap lower bytes */ | 15 | asm("xchgb %b0,%h0\n\t" /* swap lower bytes */ |
17 | "rorl $16,%0\n\t" /* swap words */ | 16 | "rorl $16,%0\n\t" /* swap words */ |
18 | "xchgb %b0,%h0" /* swap higher bytes */ | 17 | "xchgb %b0,%h0" /* swap higher bytes */ |
19 | : "=q" (x) | 18 | : "=q" (val) |
20 | : "0" (x)); | 19 | : "0" (val)); |
20 | # endif | ||
21 | |||
22 | #else /* __i386__ */ | ||
23 | asm("bswapl %0" | ||
24 | : "=r" (val) | ||
25 | : "0" (val)); | ||
21 | #endif | 26 | #endif |
22 | return x; | 27 | return val; |
23 | } | 28 | } |
29 | #define __arch_swab32 __arch_swab32 | ||
24 | 30 | ||
25 | static inline __attribute_const__ __u64 ___arch__swab64(__u64 val) | 31 | static inline __attribute_const__ __u64 __arch_swab64(__u64 val) |
26 | { | 32 | { |
33 | #ifdef __i386__ | ||
27 | union { | 34 | union { |
28 | struct { | 35 | struct { |
29 | __u32 a; | 36 | __u32 a; |
@@ -32,50 +39,27 @@ static inline __attribute_const__ __u64 ___arch__swab64(__u64 val) | |||
32 | __u64 u; | 39 | __u64 u; |
33 | } v; | 40 | } v; |
34 | v.u = val; | 41 | v.u = val; |
35 | #ifdef CONFIG_X86_BSWAP | 42 | # ifdef CONFIG_X86_BSWAP |
36 | asm("bswapl %0 ; bswapl %1 ; xchgl %0,%1" | 43 | asm("bswapl %0 ; bswapl %1 ; xchgl %0,%1" |
37 | : "=r" (v.s.a), "=r" (v.s.b) | 44 | : "=r" (v.s.a), "=r" (v.s.b) |
38 | : "0" (v.s.a), "1" (v.s.b)); | 45 | : "0" (v.s.a), "1" (v.s.b)); |
39 | #else | 46 | # else |
40 | v.s.a = ___arch__swab32(v.s.a); | 47 | v.s.a = __arch_swab32(v.s.a); |
41 | v.s.b = ___arch__swab32(v.s.b); | 48 | v.s.b = __arch_swab32(v.s.b); |
42 | asm("xchgl %0,%1" | 49 | asm("xchgl %0,%1" |
43 | : "=r" (v.s.a), "=r" (v.s.b) | 50 | : "=r" (v.s.a), "=r" (v.s.b) |
44 | : "0" (v.s.a), "1" (v.s.b)); | 51 | : "0" (v.s.a), "1" (v.s.b)); |
45 | #endif | 52 | # endif |
46 | return v.u; | 53 | return v.u; |
47 | } | ||
48 | |||
49 | #else /* __i386__ */ | 54 | #else /* __i386__ */ |
50 | |||
51 | static inline __attribute_const__ __u64 ___arch__swab64(__u64 x) | ||
52 | { | ||
53 | asm("bswapq %0" | 55 | asm("bswapq %0" |
54 | : "=r" (x) | 56 | : "=r" (val) |
55 | : "0" (x)); | 57 | : "0" (val)); |
56 | return x; | 58 | return val; |
57 | } | ||
58 | |||
59 | static inline __attribute_const__ __u32 ___arch__swab32(__u32 x) | ||
60 | { | ||
61 | asm("bswapl %0" | ||
62 | : "=r" (x) | ||
63 | : "0" (x)); | ||
64 | return x; | ||
65 | } | ||
66 | |||
67 | #endif | 59 | #endif |
60 | } | ||
61 | #define __arch_swab64 __arch_swab64 | ||
68 | 62 | ||
69 | /* Do not define swab16. Gcc is smart enough to recognize "C" version and | 63 | #include <linux/byteorder.h> |
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 | 64 | ||
81 | #endif /* _ASM_X86_BYTEORDER_H */ | 65 | #endif /* _ASM_X86_BYTEORDER_H */ |