1*7c3d14c8STreehugger Robot /* ===-- int_endianness.h - configuration header for compiler-rt ------------=== 2*7c3d14c8STreehugger Robot * 3*7c3d14c8STreehugger Robot * The LLVM Compiler Infrastructure 4*7c3d14c8STreehugger Robot * 5*7c3d14c8STreehugger Robot * This file is dual licensed under the MIT and the University of Illinois Open 6*7c3d14c8STreehugger Robot * Source Licenses. See LICENSE.TXT for details. 7*7c3d14c8STreehugger Robot * 8*7c3d14c8STreehugger Robot * ===----------------------------------------------------------------------=== 9*7c3d14c8STreehugger Robot * 10*7c3d14c8STreehugger Robot * This file is a configuration header for compiler-rt. 11*7c3d14c8STreehugger Robot * This file is not part of the interface of this library. 12*7c3d14c8STreehugger Robot * 13*7c3d14c8STreehugger Robot * ===----------------------------------------------------------------------=== 14*7c3d14c8STreehugger Robot */ 15*7c3d14c8STreehugger Robot 16*7c3d14c8STreehugger Robot #ifndef INT_ENDIANNESS_H 17*7c3d14c8STreehugger Robot #define INT_ENDIANNESS_H 18*7c3d14c8STreehugger Robot 19*7c3d14c8STreehugger Robot #if defined(__BYTE_ORDER__) && defined(__ORDER_BIG_ENDIAN__) && \ 20*7c3d14c8STreehugger Robot defined(__ORDER_LITTLE_ENDIAN__) 21*7c3d14c8STreehugger Robot 22*7c3d14c8STreehugger Robot /* Clang and GCC provide built-in endianness definitions. */ 23*7c3d14c8STreehugger Robot #if __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__ 24*7c3d14c8STreehugger Robot #define _YUGA_LITTLE_ENDIAN 0 25*7c3d14c8STreehugger Robot #define _YUGA_BIG_ENDIAN 1 26*7c3d14c8STreehugger Robot #elif __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__ 27*7c3d14c8STreehugger Robot #define _YUGA_LITTLE_ENDIAN 1 28*7c3d14c8STreehugger Robot #define _YUGA_BIG_ENDIAN 0 29*7c3d14c8STreehugger Robot #endif /* __BYTE_ORDER__ */ 30*7c3d14c8STreehugger Robot 31*7c3d14c8STreehugger Robot #else /* Compilers other than Clang or GCC. */ 32*7c3d14c8STreehugger Robot 33*7c3d14c8STreehugger Robot #if defined(__SVR4) && defined(__sun) 34*7c3d14c8STreehugger Robot #include <sys/byteorder.h> 35*7c3d14c8STreehugger Robot 36*7c3d14c8STreehugger Robot #if defined(_BIG_ENDIAN) 37*7c3d14c8STreehugger Robot #define _YUGA_LITTLE_ENDIAN 0 38*7c3d14c8STreehugger Robot #define _YUGA_BIG_ENDIAN 1 39*7c3d14c8STreehugger Robot #elif defined(_LITTLE_ENDIAN) 40*7c3d14c8STreehugger Robot #define _YUGA_LITTLE_ENDIAN 1 41*7c3d14c8STreehugger Robot #define _YUGA_BIG_ENDIAN 0 42*7c3d14c8STreehugger Robot #else /* !_LITTLE_ENDIAN */ 43*7c3d14c8STreehugger Robot #error "unknown endianness" 44*7c3d14c8STreehugger Robot #endif /* !_LITTLE_ENDIAN */ 45*7c3d14c8STreehugger Robot 46*7c3d14c8STreehugger Robot #endif /* Solaris and AuroraUX. */ 47*7c3d14c8STreehugger Robot 48*7c3d14c8STreehugger Robot /* .. */ 49*7c3d14c8STreehugger Robot 50*7c3d14c8STreehugger Robot #if defined(__FreeBSD__) || defined(__NetBSD__) || defined(__DragonFly__) || \ 51*7c3d14c8STreehugger Robot defined(__minix) 52*7c3d14c8STreehugger Robot #include <sys/endian.h> 53*7c3d14c8STreehugger Robot 54*7c3d14c8STreehugger Robot #if _BYTE_ORDER == _BIG_ENDIAN 55*7c3d14c8STreehugger Robot #define _YUGA_LITTLE_ENDIAN 0 56*7c3d14c8STreehugger Robot #define _YUGA_BIG_ENDIAN 1 57*7c3d14c8STreehugger Robot #elif _BYTE_ORDER == _LITTLE_ENDIAN 58*7c3d14c8STreehugger Robot #define _YUGA_LITTLE_ENDIAN 1 59*7c3d14c8STreehugger Robot #define _YUGA_BIG_ENDIAN 0 60*7c3d14c8STreehugger Robot #endif /* _BYTE_ORDER */ 61*7c3d14c8STreehugger Robot 62*7c3d14c8STreehugger Robot #endif /* *BSD */ 63*7c3d14c8STreehugger Robot 64*7c3d14c8STreehugger Robot #if defined(__OpenBSD__) || defined(__Bitrig__) 65*7c3d14c8STreehugger Robot #include <machine/endian.h> 66*7c3d14c8STreehugger Robot 67*7c3d14c8STreehugger Robot #if _BYTE_ORDER == _BIG_ENDIAN 68*7c3d14c8STreehugger Robot #define _YUGA_LITTLE_ENDIAN 0 69*7c3d14c8STreehugger Robot #define _YUGA_BIG_ENDIAN 1 70*7c3d14c8STreehugger Robot #elif _BYTE_ORDER == _LITTLE_ENDIAN 71*7c3d14c8STreehugger Robot #define _YUGA_LITTLE_ENDIAN 1 72*7c3d14c8STreehugger Robot #define _YUGA_BIG_ENDIAN 0 73*7c3d14c8STreehugger Robot #endif /* _BYTE_ORDER */ 74*7c3d14c8STreehugger Robot 75*7c3d14c8STreehugger Robot #endif /* OpenBSD and Bitrig. */ 76*7c3d14c8STreehugger Robot 77*7c3d14c8STreehugger Robot /* .. */ 78*7c3d14c8STreehugger Robot 79*7c3d14c8STreehugger Robot /* Mac OSX has __BIG_ENDIAN__ or __LITTLE_ENDIAN__ automatically set by the 80*7c3d14c8STreehugger Robot * compiler (at least with GCC) */ 81*7c3d14c8STreehugger Robot #if defined(__APPLE__) || defined(__ellcc__ ) 82*7c3d14c8STreehugger Robot 83*7c3d14c8STreehugger Robot #ifdef __BIG_ENDIAN__ 84*7c3d14c8STreehugger Robot #if __BIG_ENDIAN__ 85*7c3d14c8STreehugger Robot #define _YUGA_LITTLE_ENDIAN 0 86*7c3d14c8STreehugger Robot #define _YUGA_BIG_ENDIAN 1 87*7c3d14c8STreehugger Robot #endif 88*7c3d14c8STreehugger Robot #endif /* __BIG_ENDIAN__ */ 89*7c3d14c8STreehugger Robot 90*7c3d14c8STreehugger Robot #ifdef __LITTLE_ENDIAN__ 91*7c3d14c8STreehugger Robot #if __LITTLE_ENDIAN__ 92*7c3d14c8STreehugger Robot #define _YUGA_LITTLE_ENDIAN 1 93*7c3d14c8STreehugger Robot #define _YUGA_BIG_ENDIAN 0 94*7c3d14c8STreehugger Robot #endif 95*7c3d14c8STreehugger Robot #endif /* __LITTLE_ENDIAN__ */ 96*7c3d14c8STreehugger Robot 97*7c3d14c8STreehugger Robot #endif /* Mac OSX */ 98*7c3d14c8STreehugger Robot 99*7c3d14c8STreehugger Robot /* .. */ 100*7c3d14c8STreehugger Robot 101*7c3d14c8STreehugger Robot #if defined(_WIN32) 102*7c3d14c8STreehugger Robot 103*7c3d14c8STreehugger Robot #define _YUGA_LITTLE_ENDIAN 1 104*7c3d14c8STreehugger Robot #define _YUGA_BIG_ENDIAN 0 105*7c3d14c8STreehugger Robot 106*7c3d14c8STreehugger Robot #endif /* Windows */ 107*7c3d14c8STreehugger Robot 108*7c3d14c8STreehugger Robot #endif /* Clang or GCC. */ 109*7c3d14c8STreehugger Robot 110*7c3d14c8STreehugger Robot /* . */ 111*7c3d14c8STreehugger Robot 112*7c3d14c8STreehugger Robot #if !defined(_YUGA_LITTLE_ENDIAN) || !defined(_YUGA_BIG_ENDIAN) 113*7c3d14c8STreehugger Robot #error Unable to determine endian 114*7c3d14c8STreehugger Robot #endif /* Check we found an endianness correctly. */ 115*7c3d14c8STreehugger Robot 116*7c3d14c8STreehugger Robot #endif /* INT_ENDIANNESS_H */ 117