1 1.1 joerg /* ===-- endianness.h - configuration header for libgcc replacement --------=== 2 1.1 joerg * 3 1.1 joerg * The LLVM Compiler Infrastructure 4 1.1 joerg * 5 1.1 joerg * This file is dual licensed under the MIT and the University of Illinois Open 6 1.1 joerg * Source Licenses. See LICENSE.TXT for details. 7 1.1 joerg * 8 1.1 joerg * ===----------------------------------------------------------------------=== 9 1.1 joerg * 10 1.1 joerg * This file is a configuration header for libgcc replacement. 11 1.1 joerg * This file is not part of the interface of this library. 12 1.1 joerg * 13 1.1 joerg * ===----------------------------------------------------------------------=== 14 1.1 joerg */ 15 1.1 joerg 16 1.1 joerg #ifndef ENDIANNESS_H 17 1.1 joerg #define ENDIANNESS_H 18 1.1 joerg 19 1.1 joerg /* 20 1.1 joerg * Known limitations: 21 1.1 joerg * Middle endian systems are not handled currently. 22 1.1 joerg */ 23 1.1 joerg 24 1.1 joerg #if defined(__SVR4) && defined(__sun) 25 1.1 joerg #include <sys/byteorder.h> 26 1.1 joerg 27 1.1 joerg #if _BYTE_ORDER == _BIG_ENDIAN 28 1.1 joerg #define _YUGA_LITTLE_ENDIAN 0 29 1.1 joerg #define _YUGA_BIG_ENDIAN 1 30 1.1 joerg #elif _BYTE_ORDER == _LITTLE_ENDIAN 31 1.1 joerg #define _YUGA_LITTLE_ENDIAN 1 32 1.1 joerg #define _YUGA_BIG_ENDIAN 0 33 1.1 joerg #endif /* _BYTE_ORDER */ 34 1.1 joerg 35 1.1 joerg #endif /* Solaris and AuroraUX. */ 36 1.1 joerg 37 1.1 joerg /* .. */ 38 1.1 joerg 39 1.1 joerg #if defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__DragonflyBSD__) || defined(__minix) 40 1.1 joerg #include <sys/endian.h> 41 1.1 joerg 42 1.1 joerg #if _BYTE_ORDER == _BIG_ENDIAN 43 1.1 joerg #define _YUGA_LITTLE_ENDIAN 0 44 1.1 joerg #define _YUGA_BIG_ENDIAN 1 45 1.1 joerg #elif _BYTE_ORDER == _LITTLE_ENDIAN 46 1.1 joerg #define _YUGA_LITTLE_ENDIAN 1 47 1.1 joerg #define _YUGA_BIG_ENDIAN 0 48 1.1 joerg #endif /* _BYTE_ORDER */ 49 1.1 joerg 50 1.1 joerg #endif /* *BSD */ 51 1.1 joerg 52 1.1 joerg /* .. */ 53 1.1 joerg 54 1.1 joerg #if defined(__OpenBSD__) || defined(__Bitrig__) 55 1.1 joerg #include <machine/endian.h> 56 1.1 joerg 57 1.1 joerg #if _BYTE_ORDER == _BIG_ENDIAN 58 1.1 joerg #define _YUGA_LITTLE_ENDIAN 0 59 1.1 joerg #define _YUGA_BIG_ENDIAN 1 60 1.1 joerg #elif _BYTE_ORDER == _LITTLE_ENDIAN 61 1.1 joerg #define _YUGA_LITTLE_ENDIAN 1 62 1.1 joerg #define _YUGA_BIG_ENDIAN 0 63 1.1 joerg #endif /* _BYTE_ORDER */ 64 1.1 joerg 65 1.1 joerg #endif /* OpenBSD and Bitrig. */ 66 1.1 joerg 67 1.1 joerg /* .. */ 68 1.1 joerg 69 1.1 joerg /* Mac OSX has __BIG_ENDIAN__ or __LITTLE_ENDIAN__ automatically set by the compiler (at least with GCC) */ 70 1.1 joerg #if defined(__APPLE__) && defined(__MACH__) || defined(__ellcc__ ) 71 1.1 joerg 72 1.1 joerg #ifdef __BIG_ENDIAN__ 73 1.1 joerg #if __BIG_ENDIAN__ 74 1.1 joerg #define _YUGA_LITTLE_ENDIAN 0 75 1.1 joerg #define _YUGA_BIG_ENDIAN 1 76 1.1 joerg #endif 77 1.1 joerg #endif /* __BIG_ENDIAN__ */ 78 1.1 joerg 79 1.1 joerg #ifdef __LITTLE_ENDIAN__ 80 1.1 joerg #if __LITTLE_ENDIAN__ 81 1.1 joerg #define _YUGA_LITTLE_ENDIAN 1 82 1.1 joerg #define _YUGA_BIG_ENDIAN 0 83 1.1 joerg #endif 84 1.1 joerg #endif /* __LITTLE_ENDIAN__ */ 85 1.1 joerg 86 1.1 joerg #endif /* Mac OSX */ 87 1.1 joerg 88 1.1 joerg /* .. */ 89 1.1 joerg 90 1.1 joerg #if defined(__linux__) 91 1.1 joerg #include <endian.h> 92 1.1 joerg 93 1.1 joerg #if __BYTE_ORDER == __BIG_ENDIAN 94 1.1 joerg #define _YUGA_LITTLE_ENDIAN 0 95 1.1 joerg #define _YUGA_BIG_ENDIAN 1 96 1.1 joerg #elif __BYTE_ORDER == __LITTLE_ENDIAN 97 1.1 joerg #define _YUGA_LITTLE_ENDIAN 1 98 1.1 joerg #define _YUGA_BIG_ENDIAN 0 99 1.1 joerg #endif /* __BYTE_ORDER */ 100 1.1 joerg 101 1.1 joerg #endif /* GNU/Linux */ 102 1.1 joerg 103 1.1 joerg /* . */ 104 1.1 joerg 105 1.1 joerg #if !defined(_YUGA_LITTLE_ENDIAN) || !defined(_YUGA_BIG_ENDIAN) 106 1.1 joerg #error Unable to determine endian 107 1.1 joerg #endif /* Check we found an endianness correctly. */ 108 1.1 joerg 109 1.1 joerg #endif /* ENDIANNESS_H */ 110
Indexes created Sun Sep 21 14:09:52 GMT 2025