1*7c3d14c8STreehugger Robot /* ===-- endianness.h - configuration header for libgcc replacement --------=== 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 libgcc replacement. 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 ENDIANNESS_H 17*7c3d14c8STreehugger Robot #define ENDIANNESS_H 18*7c3d14c8STreehugger Robot 19*7c3d14c8STreehugger Robot /* 20*7c3d14c8STreehugger Robot * Known limitations: 21*7c3d14c8STreehugger Robot * Middle endian systems are not handled currently. 22*7c3d14c8STreehugger Robot */ 23*7c3d14c8STreehugger Robot 24*7c3d14c8STreehugger Robot #if defined(__SVR4) && defined(__sun) 25*7c3d14c8STreehugger Robot #include <sys/byteorder.h> 26*7c3d14c8STreehugger Robot 27*7c3d14c8STreehugger Robot #if _BYTE_ORDER == _BIG_ENDIAN 28*7c3d14c8STreehugger Robot #define _YUGA_LITTLE_ENDIAN 0 29*7c3d14c8STreehugger Robot #define _YUGA_BIG_ENDIAN 1 30*7c3d14c8STreehugger Robot #elif _BYTE_ORDER == _LITTLE_ENDIAN 31*7c3d14c8STreehugger Robot #define _YUGA_LITTLE_ENDIAN 1 32*7c3d14c8STreehugger Robot #define _YUGA_BIG_ENDIAN 0 33*7c3d14c8STreehugger Robot #endif /* _BYTE_ORDER */ 34*7c3d14c8STreehugger Robot 35*7c3d14c8STreehugger Robot #endif /* Solaris and AuroraUX. */ 36*7c3d14c8STreehugger Robot 37*7c3d14c8STreehugger Robot /* .. */ 38*7c3d14c8STreehugger Robot 39*7c3d14c8STreehugger Robot #if defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__DragonflyBSD__) || defined(__minix) 40*7c3d14c8STreehugger Robot #include <sys/endian.h> 41*7c3d14c8STreehugger Robot 42*7c3d14c8STreehugger Robot #if _BYTE_ORDER == _BIG_ENDIAN 43*7c3d14c8STreehugger Robot #define _YUGA_LITTLE_ENDIAN 0 44*7c3d14c8STreehugger Robot #define _YUGA_BIG_ENDIAN 1 45*7c3d14c8STreehugger Robot #elif _BYTE_ORDER == _LITTLE_ENDIAN 46*7c3d14c8STreehugger Robot #define _YUGA_LITTLE_ENDIAN 1 47*7c3d14c8STreehugger Robot #define _YUGA_BIG_ENDIAN 0 48*7c3d14c8STreehugger Robot #endif /* _BYTE_ORDER */ 49*7c3d14c8STreehugger Robot 50*7c3d14c8STreehugger Robot #endif /* *BSD */ 51*7c3d14c8STreehugger Robot 52*7c3d14c8STreehugger Robot /* .. */ 53*7c3d14c8STreehugger Robot 54*7c3d14c8STreehugger Robot #if defined(__OpenBSD__) || defined(__Bitrig__) 55*7c3d14c8STreehugger Robot #include <machine/endian.h> 56*7c3d14c8STreehugger Robot 57*7c3d14c8STreehugger Robot #if _BYTE_ORDER == _BIG_ENDIAN 58*7c3d14c8STreehugger Robot #define _YUGA_LITTLE_ENDIAN 0 59*7c3d14c8STreehugger Robot #define _YUGA_BIG_ENDIAN 1 60*7c3d14c8STreehugger Robot #elif _BYTE_ORDER == _LITTLE_ENDIAN 61*7c3d14c8STreehugger Robot #define _YUGA_LITTLE_ENDIAN 1 62*7c3d14c8STreehugger Robot #define _YUGA_BIG_ENDIAN 0 63*7c3d14c8STreehugger Robot #endif /* _BYTE_ORDER */ 64*7c3d14c8STreehugger Robot 65*7c3d14c8STreehugger Robot #endif /* OpenBSD and Bitrig. */ 66*7c3d14c8STreehugger Robot 67*7c3d14c8STreehugger Robot /* .. */ 68*7c3d14c8STreehugger Robot 69*7c3d14c8STreehugger Robot /* Mac OSX has __BIG_ENDIAN__ or __LITTLE_ENDIAN__ automatically set by the compiler (at least with GCC) */ 70*7c3d14c8STreehugger Robot #if defined(__APPLE__) && defined(__MACH__) || defined(__ellcc__ ) 71*7c3d14c8STreehugger Robot 72*7c3d14c8STreehugger Robot #ifdef __BIG_ENDIAN__ 73*7c3d14c8STreehugger Robot #if __BIG_ENDIAN__ 74*7c3d14c8STreehugger Robot #define _YUGA_LITTLE_ENDIAN 0 75*7c3d14c8STreehugger Robot #define _YUGA_BIG_ENDIAN 1 76*7c3d14c8STreehugger Robot #endif 77*7c3d14c8STreehugger Robot #endif /* __BIG_ENDIAN__ */ 78*7c3d14c8STreehugger Robot 79*7c3d14c8STreehugger Robot #ifdef __LITTLE_ENDIAN__ 80*7c3d14c8STreehugger Robot #if __LITTLE_ENDIAN__ 81*7c3d14c8STreehugger Robot #define _YUGA_LITTLE_ENDIAN 1 82*7c3d14c8STreehugger Robot #define _YUGA_BIG_ENDIAN 0 83*7c3d14c8STreehugger Robot #endif 84*7c3d14c8STreehugger Robot #endif /* __LITTLE_ENDIAN__ */ 85*7c3d14c8STreehugger Robot 86*7c3d14c8STreehugger Robot #endif /* Mac OSX */ 87*7c3d14c8STreehugger Robot 88*7c3d14c8STreehugger Robot /* .. */ 89*7c3d14c8STreehugger Robot 90*7c3d14c8STreehugger Robot #if defined(__linux__) 91*7c3d14c8STreehugger Robot #include <endian.h> 92*7c3d14c8STreehugger Robot 93*7c3d14c8STreehugger Robot #if __BYTE_ORDER == __BIG_ENDIAN 94*7c3d14c8STreehugger Robot #define _YUGA_LITTLE_ENDIAN 0 95*7c3d14c8STreehugger Robot #define _YUGA_BIG_ENDIAN 1 96*7c3d14c8STreehugger Robot #elif __BYTE_ORDER == __LITTLE_ENDIAN 97*7c3d14c8STreehugger Robot #define _YUGA_LITTLE_ENDIAN 1 98*7c3d14c8STreehugger Robot #define _YUGA_BIG_ENDIAN 0 99*7c3d14c8STreehugger Robot #endif /* __BYTE_ORDER */ 100*7c3d14c8STreehugger Robot 101*7c3d14c8STreehugger Robot #endif /* GNU/Linux */ 102*7c3d14c8STreehugger Robot 103*7c3d14c8STreehugger Robot /* . */ 104*7c3d14c8STreehugger Robot 105*7c3d14c8STreehugger Robot #if !defined(_YUGA_LITTLE_ENDIAN) || !defined(_YUGA_BIG_ENDIAN) 106*7c3d14c8STreehugger Robot #error Unable to determine endian 107*7c3d14c8STreehugger Robot #endif /* Check we found an endianness correctly. */ 108*7c3d14c8STreehugger Robot 109*7c3d14c8STreehugger Robot #endif /* ENDIANNESS_H */ 110