1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 | //===-- int_endianness.h - configuration header for compiler-rt -----------===// // // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. // See https://llvm.org/LICENSE.txt for license information. // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception // //===----------------------------------------------------------------------===// // // This file is a configuration header for compiler-rt. // This file is not part of the interface of this library. // //===----------------------------------------------------------------------===// #ifndef INT_ENDIANNESS_H #define INT_ENDIANNESS_H #if defined(__BYTE_ORDER__) && defined(__ORDER_BIG_ENDIAN__) && \ defined(__ORDER_LITTLE_ENDIAN__) // Clang and GCC provide built-in endianness definitions. #if __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__ #define _YUGA_LITTLE_ENDIAN 0 #define _YUGA_BIG_ENDIAN 1 #elif __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__ #define _YUGA_LITTLE_ENDIAN 1 #define _YUGA_BIG_ENDIAN 0 #endif // __BYTE_ORDER__ #else // Compilers other than Clang or GCC. #if defined(__SVR4) && defined(__sun) #include <sys/byteorder.h> #if defined(_BIG_ENDIAN) #define _YUGA_LITTLE_ENDIAN 0 #define _YUGA_BIG_ENDIAN 1 #elif defined(_LITTLE_ENDIAN) #define _YUGA_LITTLE_ENDIAN 1 #define _YUGA_BIG_ENDIAN 0 #else // !_LITTLE_ENDIAN #error "unknown endianness" #endif // !_LITTLE_ENDIAN #endif // Solaris and AuroraUX. // .. #if defined(__FreeBSD__) || defined(__NetBSD__) || defined(__DragonFly__) || \ defined(__minix) #include <sys/endian.h> #if _BYTE_ORDER == _BIG_ENDIAN #define _YUGA_LITTLE_ENDIAN 0 #define _YUGA_BIG_ENDIAN 1 #elif _BYTE_ORDER == _LITTLE_ENDIAN #define _YUGA_LITTLE_ENDIAN 1 #define _YUGA_BIG_ENDIAN 0 #endif // _BYTE_ORDER #endif // *BSD #if defined(__OpenBSD__) #include <machine/endian.h> #if _BYTE_ORDER == _BIG_ENDIAN #define _YUGA_LITTLE_ENDIAN 0 #define _YUGA_BIG_ENDIAN 1 #elif _BYTE_ORDER == _LITTLE_ENDIAN #define _YUGA_LITTLE_ENDIAN 1 #define _YUGA_BIG_ENDIAN 0 #endif // _BYTE_ORDER #endif // OpenBSD // .. // Mac OSX has __BIG_ENDIAN__ or __LITTLE_ENDIAN__ automatically set by the // compiler (at least with GCC) #if defined(__APPLE__) || defined(__ellcc__) #ifdef __BIG_ENDIAN__ #if __BIG_ENDIAN__ #define _YUGA_LITTLE_ENDIAN 0 #define _YUGA_BIG_ENDIAN 1 #endif #endif // __BIG_ENDIAN__ #ifdef __LITTLE_ENDIAN__ #if __LITTLE_ENDIAN__ #define _YUGA_LITTLE_ENDIAN 1 #define _YUGA_BIG_ENDIAN 0 #endif #endif // __LITTLE_ENDIAN__ #endif // Mac OSX // .. #if defined(_WIN32) #define _YUGA_LITTLE_ENDIAN 1 #define _YUGA_BIG_ENDIAN 0 #endif // Windows #endif // Clang or GCC. // . #if !defined(_YUGA_LITTLE_ENDIAN) || !defined(_YUGA_BIG_ENDIAN) #error Unable to determine endian #endif // Check we found an endianness correctly. #endif // INT_ENDIANNESS_H |