| dp-arm | 75b6057 | 2017-05-04 12:12:06 +0100 | [diff] [blame] | 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 */ |