diff options
Diffstat (limited to 'include/linux/byteorder/swabb.h')
-rw-r--r-- | include/linux/byteorder/swabb.h | 135 |
1 files changed, 0 insertions, 135 deletions
diff --git a/include/linux/byteorder/swabb.h b/include/linux/byteorder/swabb.h deleted file mode 100644 index 8c780c7d779e..000000000000 --- a/include/linux/byteorder/swabb.h +++ /dev/null | |||
@@ -1,135 +0,0 @@ | |||
1 | #ifndef _LINUX_BYTEORDER_SWABB_H | ||
2 | #define _LINUX_BYTEORDER_SWABB_H | ||
3 | |||
4 | /* | ||
5 | * linux/byteorder/swabb.h | ||
6 | * SWAp Bytes Bizarrely | ||
7 | * swaHHXX[ps]?(foo) | ||
8 | * | ||
9 | * Support for obNUXIous pdp-endian and other bizarre architectures. | ||
10 | * Will Linux ever run on such ancient beasts? if not, this file | ||
11 | * will be but a programming pearl. Still, it's a reminder that we | ||
12 | * shouldn't be making too many assumptions when trying to be portable. | ||
13 | * | ||
14 | */ | ||
15 | |||
16 | /* | ||
17 | * Meaning of the names I chose (vaxlinux people feel free to correct them): | ||
18 | * swahw32 swap 16-bit half-words in a 32-bit word | ||
19 | * swahb32 swap 8-bit halves of each 16-bit half-word in a 32-bit word | ||
20 | * | ||
21 | * No 64-bit support yet. I don't know NUXI conventions for long longs. | ||
22 | * I guarantee it will be a mess when it's there, though :-> | ||
23 | * It will be even worse if there are conflicting 64-bit conventions. | ||
24 | * Hopefully, no one ever used 64-bit objects on NUXI machines. | ||
25 | * | ||
26 | */ | ||
27 | |||
28 | #include <linux/types.h> | ||
29 | |||
30 | #define ___swahw32(x) \ | ||
31 | ({ \ | ||
32 | __u32 __x = (x); \ | ||
33 | ((__u32)( \ | ||
34 | (((__u32)(__x) & (__u32)0x0000ffffUL) << 16) | \ | ||
35 | (((__u32)(__x) & (__u32)0xffff0000UL) >> 16) )); \ | ||
36 | }) | ||
37 | #define ___swahb32(x) \ | ||
38 | ({ \ | ||
39 | __u32 __x = (x); \ | ||
40 | ((__u32)( \ | ||
41 | (((__u32)(__x) & (__u32)0x00ff00ffUL) << 8) | \ | ||
42 | (((__u32)(__x) & (__u32)0xff00ff00UL) >> 8) )); \ | ||
43 | }) | ||
44 | |||
45 | #define ___constant_swahw32(x) \ | ||
46 | ((__u32)( \ | ||
47 | (((__u32)(x) & (__u32)0x0000ffffUL) << 16) | \ | ||
48 | (((__u32)(x) & (__u32)0xffff0000UL) >> 16) )) | ||
49 | #define ___constant_swahb32(x) \ | ||
50 | ((__u32)( \ | ||
51 | (((__u32)(x) & (__u32)0x00ff00ffUL) << 8) | \ | ||
52 | (((__u32)(x) & (__u32)0xff00ff00UL) >> 8) )) | ||
53 | |||
54 | /* | ||
55 | * provide defaults when no architecture-specific optimization is detected | ||
56 | */ | ||
57 | #ifndef __arch__swahw32 | ||
58 | # define __arch__swahw32(x) ___swahw32(x) | ||
59 | #endif | ||
60 | #ifndef __arch__swahb32 | ||
61 | # define __arch__swahb32(x) ___swahb32(x) | ||
62 | #endif | ||
63 | |||
64 | #ifndef __arch__swahw32p | ||
65 | # define __arch__swahw32p(x) __swahw32(*(x)) | ||
66 | #endif | ||
67 | #ifndef __arch__swahb32p | ||
68 | # define __arch__swahb32p(x) __swahb32(*(x)) | ||
69 | #endif | ||
70 | |||
71 | #ifndef __arch__swahw32s | ||
72 | # define __arch__swahw32s(x) do { *(x) = __swahw32p((x)); } while (0) | ||
73 | #endif | ||
74 | #ifndef __arch__swahb32s | ||
75 | # define __arch__swahb32s(x) do { *(x) = __swahb32p((x)); } while (0) | ||
76 | #endif | ||
77 | |||
78 | |||
79 | /* | ||
80 | * Allow constant folding | ||
81 | */ | ||
82 | #define __swahw32(x) \ | ||
83 | (__builtin_constant_p((__u32)(x)) ? \ | ||
84 | ___swahw32((x)) : \ | ||
85 | __fswahw32((x))) | ||
86 | #define __swahb32(x) \ | ||
87 | (__builtin_constant_p((__u32)(x)) ? \ | ||
88 | ___swahb32((x)) : \ | ||
89 | __fswahb32((x))) | ||
90 | |||
91 | |||
92 | static inline __u32 __fswahw32(__u32 x) | ||
93 | { | ||
94 | return __arch__swahw32(x); | ||
95 | } | ||
96 | |||
97 | static inline __u32 __swahw32p(__u32 *x) | ||
98 | { | ||
99 | return __arch__swahw32p(x); | ||
100 | } | ||
101 | |||
102 | static inline void __swahw32s(__u32 *addr) | ||
103 | { | ||
104 | __arch__swahw32s(addr); | ||
105 | } | ||
106 | |||
107 | static inline __u32 __fswahb32(__u32 x) | ||
108 | { | ||
109 | return __arch__swahb32(x); | ||
110 | } | ||
111 | |||
112 | static inline __u32 __swahb32p(__u32 *x) | ||
113 | { | ||
114 | return __arch__swahb32p(x); | ||
115 | } | ||
116 | |||
117 | static inline void __swahb32s(__u32 *addr) | ||
118 | { | ||
119 | __arch__swahb32s(addr); | ||
120 | } | ||
121 | |||
122 | #ifdef __BYTEORDER_HAS_U64__ | ||
123 | /* | ||
124 | * Not supported yet | ||
125 | */ | ||
126 | #endif /* __BYTEORDER_HAS_U64__ */ | ||
127 | |||
128 | #define swahw32 __swahw32 | ||
129 | #define swahb32 __swahb32 | ||
130 | #define swahw32p __swahw32p | ||
131 | #define swahb32p __swahb32p | ||
132 | #define swahw32s __swahw32s | ||
133 | #define swahb32s __swahb32s | ||
134 | |||
135 | #endif /* _LINUX_BYTEORDER_SWABB_H */ | ||