compiler-rt/test/builtins/Unit/endianness.h

   1 #ifndef ENDIANNESS_H
   2 #define ENDIANNESS_H
   3
   4 /*
   5  * Known limitations:
   6  *   Middle endian systems are not handled currently.
   7  */
   8
   9 #if defined(__SVR4) && defined(__sun)
  10 #include <sys/byteorder.h>
  11
  12 #if _BYTE_ORDER == _BIG_ENDIAN
  13 #define _YUGA_LITTLE_ENDIAN 0
  14 #define _YUGA_BIG_ENDIAN    1
  15 #elif _BYTE_ORDER == _LITTLE_ENDIAN
  16 #define _YUGA_LITTLE_ENDIAN 1
  17 #define _YUGA_BIG_ENDIAN    0
  18 #endif /* _BYTE_ORDER */
  19
  20 #endif /* Solaris */
  21
  22 /* .. */
  23
  24 #if defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__DragonflyBSD__) || defined(__minix)
  25 #include <sys/endian.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 /* *BSD */
  36
  37 /* .. */
  38
  39 #if defined(__OpenBSD__)
  40 #include <machine/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 /* OpenBSD */
  51
  52 /* .. */
  53
  54 /* Mac OSX has __BIG_ENDIAN__ or __LITTLE_ENDIAN__ automatically set by the compiler (at least with GCC) */
  55 #if defined(__APPLE__) && defined(__MACH__) || defined(__ellcc__ )
  56
  57 #ifdef __BIG_ENDIAN__
  58 #if __BIG_ENDIAN__
  59 #define _YUGA_LITTLE_ENDIAN 0
  60 #define _YUGA_BIG_ENDIAN    1
  61 #endif
  62 #endif /* __BIG_ENDIAN__ */
  63
  64 #ifdef __LITTLE_ENDIAN__
  65 #if __LITTLE_ENDIAN__
  66 #define _YUGA_LITTLE_ENDIAN 1
  67 #define _YUGA_BIG_ENDIAN    0
  68 #endif
  69 #endif /* __LITTLE_ENDIAN__ */
  70
  71 #endif /* Mac OSX */
  72
  73 /* .. */
  74
  75 #if defined(__linux__)
  76 #include <endian.h>
  77
  78 #if __BYTE_ORDER == __BIG_ENDIAN
  79 #define _YUGA_LITTLE_ENDIAN 0
  80 #define _YUGA_BIG_ENDIAN    1
  81 #elif __BYTE_ORDER == __LITTLE_ENDIAN
  82 #define _YUGA_LITTLE_ENDIAN 1
  83 #define _YUGA_BIG_ENDIAN    0
  84 #endif /* __BYTE_ORDER */
  85
  86 #endif /* GNU/Linux */
  87
  88 /* . */
  89
  90 #if !defined(_YUGA_LITTLE_ENDIAN) || !defined(_YUGA_BIG_ENDIAN)
  91 #error Unable to determine endian
  92 #endif /* Check we found an endianness correctly. */
  93
  94 #endif /* ENDIANNESS_H */