1 | /* ===-- int_endianness.h - configuration header for compiler-rt ------------=== |
2 | * |
3 | * The LLVM Compiler Infrastructure |
4 | * |
5 | * This file is dual licensed under the MIT and the University of Illinois Open |
6 | * Source Licenses. See LICENSE.TXT for details. |
7 | * |
8 | * ===----------------------------------------------------------------------=== |
9 | * |
10 | * This file is a configuration header for compiler-rt. |
11 | * This file is not part of the interface of this library. |
12 | * |
13 | * ===----------------------------------------------------------------------=== |
14 | */ |
15 | |
16 | #ifndef INT_ENDIANNESS_H |
17 | #define INT_ENDIANNESS_H |
18 | |
19 | #if defined(__BYTE_ORDER__) && defined(__ORDER_BIG_ENDIAN__) && \ |
20 | defined(__ORDER_LITTLE_ENDIAN__) |
21 | |
22 | /* Clang and GCC provide built-in endianness definitions. */ |
23 | #if __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__ |
24 | #define _YUGA_LITTLE_ENDIAN 0 |
25 | #define _YUGA_BIG_ENDIAN 1 |
26 | #elif __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__ |
27 | #define _YUGA_LITTLE_ENDIAN 1 |
28 | #define _YUGA_BIG_ENDIAN 0 |
29 | #endif /* __BYTE_ORDER__ */ |
30 | |
31 | #else /* Compilers other than Clang or GCC. */ |
32 | |
33 | #if defined(__SVR4) && defined(__sun) |
34 | #include <sys/byteorder.h> |
35 | |
36 | #if defined(_BIG_ENDIAN) |
37 | #define _YUGA_LITTLE_ENDIAN 0 |
38 | #define _YUGA_BIG_ENDIAN 1 |
39 | #elif defined(_LITTLE_ENDIAN) |
40 | #define _YUGA_LITTLE_ENDIAN 1 |
41 | #define _YUGA_BIG_ENDIAN 0 |
42 | #else /* !_LITTLE_ENDIAN */ |
43 | #error "unknown endianness" |
44 | #endif /* !_LITTLE_ENDIAN */ |
45 | |
46 | #endif /* Solaris and AuroraUX. */ |
47 | |
48 | /* .. */ |
49 | |
50 | #if defined(__FreeBSD__) || defined(__NetBSD__) || defined(__DragonFly__) || \ |
51 | defined(__minix) |
52 | #include <sys/endian.h> |
53 | |
54 | #if _BYTE_ORDER == _BIG_ENDIAN |
55 | #define _YUGA_LITTLE_ENDIAN 0 |
56 | #define _YUGA_BIG_ENDIAN 1 |
57 | #elif _BYTE_ORDER == _LITTLE_ENDIAN |
58 | #define _YUGA_LITTLE_ENDIAN 1 |
59 | #define _YUGA_BIG_ENDIAN 0 |
60 | #endif /* _BYTE_ORDER */ |
61 | |
62 | #endif /* *BSD */ |
63 | |
64 | #if defined(__OpenBSD__) || defined(__Bitrig__) |
65 | #include <machine/endian.h> |
66 | |
67 | #if _BYTE_ORDER == _BIG_ENDIAN |
68 | #define _YUGA_LITTLE_ENDIAN 0 |
69 | #define _YUGA_BIG_ENDIAN 1 |
70 | #elif _BYTE_ORDER == _LITTLE_ENDIAN |
71 | #define _YUGA_LITTLE_ENDIAN 1 |
72 | #define _YUGA_BIG_ENDIAN 0 |
73 | #endif /* _BYTE_ORDER */ |
74 | |
75 | #endif /* OpenBSD and Bitrig. */ |
76 | |
77 | /* .. */ |
78 | |
79 | /* Mac OSX has __BIG_ENDIAN__ or __LITTLE_ENDIAN__ automatically set by the |
80 | * compiler (at least with GCC) */ |
81 | #if defined(__APPLE__) || defined(__ellcc__ ) |
82 | |
83 | #ifdef __BIG_ENDIAN__ |
84 | #if __BIG_ENDIAN__ |
85 | #define _YUGA_LITTLE_ENDIAN 0 |
86 | #define _YUGA_BIG_ENDIAN 1 |
87 | #endif |
88 | #endif /* __BIG_ENDIAN__ */ |
89 | |
90 | #ifdef __LITTLE_ENDIAN__ |
91 | #if __LITTLE_ENDIAN__ |
92 | #define _YUGA_LITTLE_ENDIAN 1 |
93 | #define _YUGA_BIG_ENDIAN 0 |
94 | #endif |
95 | #endif /* __LITTLE_ENDIAN__ */ |
96 | |
97 | #endif /* Mac OSX */ |
98 | |
99 | /* .. */ |
100 | |
101 | #if defined(_WIN32) |
102 | |
103 | #define _YUGA_LITTLE_ENDIAN 1 |
104 | #define _YUGA_BIG_ENDIAN 0 |
105 | |
106 | #endif /* Windows */ |
107 | |
108 | #endif /* Clang or GCC. */ |
109 | |
110 | /* . */ |
111 | |
112 | #if !defined(_YUGA_LITTLE_ENDIAN) || !defined(_YUGA_BIG_ENDIAN) |
113 | #error Unable to determine endian |
114 | #endif /* Check we found an endianness correctly. */ |
115 | |
116 | #endif /* INT_ENDIANNESS_H */ |
117 | |