sys/external/bsd/compiler_rt/dist/test/Unit/endianness.h

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