int_endianness.h revision 1.1.1.1
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 defined(_BIG_ENDIAN) 23#define _YUGA_LITTLE_ENDIAN 0 24#define _YUGA_BIG_ENDIAN 1 25#elif defined(_LITTLE_ENDIAN) 26#define _YUGA_LITTLE_ENDIAN 1 27#define _YUGA_BIG_ENDIAN 0 28#else /* !_LITTLE_ENDIAN */ 29#error "unknown endianness" 30#endif /* !_LITTLE_ENDIAN */ 31 32#endif /* Solaris and AuroraUX. */ 33 34/* .. */ 35 36#if defined(__FreeBSD__) || defined(__NetBSD__) || defined(__DragonFly__) || defined(__minix) 37#include <sys/endian.h> 38 39#if _BYTE_ORDER == _BIG_ENDIAN 40#define _YUGA_LITTLE_ENDIAN 0 41#define _YUGA_BIG_ENDIAN 1 42#elif _BYTE_ORDER == _LITTLE_ENDIAN 43#define _YUGA_LITTLE_ENDIAN 1 44#define _YUGA_BIG_ENDIAN 0 45#endif /* _BYTE_ORDER */ 46 47#endif /* *BSD */ 48 49#if defined(__OpenBSD__) || defined(__Bitrig__) 50#include <machine/endian.h> 51 52#if _BYTE_ORDER == _BIG_ENDIAN 53#define _YUGA_LITTLE_ENDIAN 0 54#define _YUGA_BIG_ENDIAN 1 55#elif _BYTE_ORDER == _LITTLE_ENDIAN 56#define _YUGA_LITTLE_ENDIAN 1 57#define _YUGA_BIG_ENDIAN 0 58#endif /* _BYTE_ORDER */ 59 60#endif /* OpenBSD and Bitrig. */ 61 62/* .. */ 63 64/* Mac OSX has __BIG_ENDIAN__ or __LITTLE_ENDIAN__ automatically set by the compiler (at least with GCC) */ 65#if defined(__APPLE__) || defined(__ellcc__ ) 66 67#ifdef __BIG_ENDIAN__ 68#if __BIG_ENDIAN__ 69#define _YUGA_LITTLE_ENDIAN 0 70#define _YUGA_BIG_ENDIAN 1 71#endif 72#endif /* __BIG_ENDIAN__ */ 73 74#ifdef __LITTLE_ENDIAN__ 75#if __LITTLE_ENDIAN__ 76#define _YUGA_LITTLE_ENDIAN 1 77#define _YUGA_BIG_ENDIAN 0 78#endif 79#endif /* __LITTLE_ENDIAN__ */ 80 81#endif /* Mac OSX */ 82 83/* .. */ 84 85#if defined(__linux__) 86#include <endian.h> 87 88#if __BYTE_ORDER == __BIG_ENDIAN 89#define _YUGA_LITTLE_ENDIAN 0 90#define _YUGA_BIG_ENDIAN 1 91#elif __BYTE_ORDER == __LITTLE_ENDIAN 92#define _YUGA_LITTLE_ENDIAN 1 93#define _YUGA_BIG_ENDIAN 0 94#endif /* __BYTE_ORDER */ 95 96#endif /* GNU/Linux */ 97 98#if defined(_WIN32) 99 100#define _YUGA_LITTLE_ENDIAN 1 101#define _YUGA_BIG_ENDIAN 0 102 103#endif /* Windows */ 104 105/* . */ 106 107#if !defined(_YUGA_LITTLE_ENDIAN) || !defined(_YUGA_BIG_ENDIAN) 108#error Unable to determine endian 109#endif /* Check we found an endianness correctly. */ 110 111#endif /* INT_ENDIANNESS_H */ 112