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(__SVR4) && defined(__sun) 20 #include <sys/byteorder.h> 21 22 #if _BYTE_ORDER == _BIG_ENDIAN 23 #define _YUGA_LITTLE_ENDIAN 0 24 #define _YUGA_BIG_ENDIAN 1 25 #elif _BYTE_ORDER == _LITTLE_ENDIAN 26 #define _YUGA_LITTLE_ENDIAN 1 27 #define _YUGA_BIG_ENDIAN 0 28 #endif /* _BYTE_ORDER */ 29 30 #endif /* Solaris and AuroraUX. */ 31 32 /* .. */ 33 34 #if defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__DragonFly__) || defined(__minix) 35 #include <sys/endian.h> 36 37 #if _BYTE_ORDER == _BIG_ENDIAN 38 #define _YUGA_LITTLE_ENDIAN 0 39 #define _YUGA_BIG_ENDIAN 1 40 #elif _BYTE_ORDER == _LITTLE_ENDIAN 41 #define _YUGA_LITTLE_ENDIAN 1 42 #define _YUGA_BIG_ENDIAN 0 43 #endif /* _BYTE_ORDER */ 44 45 #endif /* *BSD */ 46 47 /* .. */ 48 49 /* Mac OSX has __BIG_ENDIAN__ or __LITTLE_ENDIAN__ automatically set by the compiler (at least with GCC) */ 50 #if defined(__APPLE__) && defined(__MACH__) || defined(__ellcc__ ) 51 52 #ifdef __BIG_ENDIAN__ 53 #if __BIG_ENDIAN__ 54 #define _YUGA_LITTLE_ENDIAN 0 55 #define _YUGA_BIG_ENDIAN 1 56 #endif 57 #endif /* __BIG_ENDIAN__ */ 58 59 #ifdef __LITTLE_ENDIAN__ 60 #if __LITTLE_ENDIAN__ 61 #define _YUGA_LITTLE_ENDIAN 1 62 #define _YUGA_BIG_ENDIAN 0 63 #endif 64 #endif /* __LITTLE_ENDIAN__ */ 65 66 #endif /* Mac OSX */ 67 68 /* .. */ 69 70 #if defined(__linux__) 71 #include <endian.h> 72 73 #if __BYTE_ORDER == __BIG_ENDIAN 74 #define _YUGA_LITTLE_ENDIAN 0 75 #define _YUGA_BIG_ENDIAN 1 76 #elif __BYTE_ORDER == __LITTLE_ENDIAN 77 #define _YUGA_LITTLE_ENDIAN 1 78 #define _YUGA_BIG_ENDIAN 0 79 #endif /* __BYTE_ORDER */ 80 81 #endif /* GNU/Linux */ 82 83 #if defined(_WIN32) 84 85 #define _YUGA_LITTLE_ENDIAN 1 86 #define _YUGA_BIG_ENDIAN 0 87 88 #endif /* Windows */ 89 90 /* . */ 91 92 #if !defined(_YUGA_LITTLE_ENDIAN) || !defined(_YUGA_BIG_ENDIAN) 93 #error Unable to determine endian 94 #endif /* Check we found an endianness correctly. */ 95 96 #endif /* INT_ENDIANNESS_H */ 97
