js/src/jscpucfg.h

   1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
   2  * vim: set ts=8 sts=4 et sw=4 tw=99:
   3  * This Source Code Form is subject to the terms of the Mozilla Public
   4  * License, v. 2.0. If a copy of the MPL was not distributed with this
   5  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   6
   7 #ifndef jscpucfg_h
   8 #define jscpucfg_h
   9
  10 #define JS_HAVE_LONG_LONG
  11
  12 #if defined(_WIN64)
  13
  14 # if defined(_M_X64) || defined(_M_AMD64) || defined(_AMD64_)
  15 #  define IS_LITTLE_ENDIAN 1
  16 #  undef  IS_BIG_ENDIAN
  17 # else  /* !(defined(_M_X64) || defined(_M_AMD64) || defined(_AMD64_)) */
  18 #  error "CPU type is unknown"
  19 # endif /* !(defined(_M_X64) || defined(_M_AMD64) || defined(_AMD64_)) */
  20
  21 #elif defined(_WIN32)
  22
  23 # ifdef __WATCOMC__
  24 #  define HAVE_VA_LIST_AS_ARRAY 1
  25 # endif
  26
  27 # define IS_LITTLE_ENDIAN 1
  28 # undef  IS_BIG_ENDIAN
  29
  30 #elif defined(__APPLE__) || defined(__powerpc__) || defined(__ppc__)
  31 # if __LITTLE_ENDIAN__
  32 #  define IS_LITTLE_ENDIAN 1
  33 #  undef  IS_BIG_ENDIAN
  34 # elif __BIG_ENDIAN__
  35 #  undef  IS_LITTLE_ENDIAN
  36 #  define IS_BIG_ENDIAN 1
  37 # endif
  38
  39 #elif defined(JS_HAVE_ENDIAN_H)
  40 # include <endian.h>
  41
  42 /*
  43  * Historically, OSes providing <endian.h> only defined
  44  * __BYTE_ORDER to either __LITTLE_ENDIAN or __BIG_ENDIAN.
  45  * The Austin group decided to standardise <endian.h> in
  46  * POSIX around 2011, expecting it to provide a BYTE_ORDER
  47  * #define set to either LITTLE_ENDIAN or BIG_ENDIAN. We
  48  * should try to cope with both possibilities here.
  49  */
  50
  51 # if defined(__BYTE_ORDER) || defined(BYTE_ORDER)
  52 #  if defined(__BYTE_ORDER)
  53 #   if __BYTE_ORDER == __LITTLE_ENDIAN
  54 #    define IS_LITTLE_ENDIAN 1
  55 #    undef  IS_BIG_ENDIAN
  56 #   elif __BYTE_ORDER == __BIG_ENDIAN
  57 #    undef  IS_LITTLE_ENDIAN
  58 #    define IS_BIG_ENDIAN 1
  59 #   endif
  60 #  endif
  61 #  if defined(BYTE_ORDER)
  62 #   if BYTE_ORDER == LITTLE_ENDIAN
  63 #    define IS_LITTLE_ENDIAN 1
  64 #    undef  IS_BIG_ENDIAN
  65 #   elif BYTE_ORDER == BIG_ENDIAN
  66 #    undef  IS_LITTLE_ENDIAN
  67 #    define IS_BIG_ENDIAN 1
  68 #   endif
  69 #  endif
  70 # else /* !defined(__BYTE_ORDER) */
  71 #  error "endian.h does not define __BYTE_ORDER nor BYTE_ORDER. Cannot determine endianness."
  72 # endif
  73
  74 /* BSDs */
  75 #elif defined(JS_HAVE_MACHINE_ENDIAN_H)
  76 # include <sys/types.h>
  77 # include <machine/endian.h>
  78
  79 # if defined(_BYTE_ORDER)
  80 #  if _BYTE_ORDER == _LITTLE_ENDIAN
  81 #   define IS_LITTLE_ENDIAN 1
  82 #   undef  IS_BIG_ENDIAN
  83 #  elif _BYTE_ORDER == _BIG_ENDIAN
  84 #   undef  IS_LITTLE_ENDIAN
  85 #   define IS_BIG_ENDIAN 1
  86 #  endif
  87 # else /* !defined(_BYTE_ORDER) */
  88 #  error "machine/endian.h does not define _BYTE_ORDER. Cannot determine endianness."
  89 # endif
  90
  91 #elif defined(JS_HAVE_SYS_ISA_DEFS_H)
  92 # include <sys/isa_defs.h>
  93
  94 # if defined(_BIG_ENDIAN)
  95 #  undef IS_LITTLE_ENDIAN
  96 #  define IS_BIG_ENDIAN 1
  97 # elif defined(_LITTLE_ENDIAN)
  98 #  define IS_LITTLE_ENDIAN 1
  99 #  undef IS_BIG_ENDIAN
 100 # else /* !defined(_LITTLE_ENDIAN) */
 101 #  error "sys/isa_defs.h does not define _BIG_ENDIAN or _LITTLE_ENDIAN. Cannot determine endianness."
 102 # endif
 103 # if !defined(JS_STACK_GROWTH_DIRECTION)
 104 #  if defined(_STACK_GROWS_UPWARD)
 105 #   define JS_STACK_GROWTH_DIRECTION (1)
 106 #  elif defined(_STACK_GROWS_DOWNWARD)
 107 #   define JS_STACK_GROWTH_DIRECTION (-1)
 108 #  endif
 109 # endif
 110
 111 #elif defined(__sparc) || defined(__sparc__) || \
 112       defined(_POWER) || defined(__hppa) || \
 113       defined(_MIPSEB) || defined(_BIG_ENDIAN)
 114 /* IA64 running HP-UX will have _BIG_ENDIAN defined.
 115  * IA64 running Linux will have endian.h and be handled above.
 116  */
 117 # undef IS_LITTLE_ENDIAN
 118 # define IS_BIG_ENDIAN 1
 119
 120 #else /* !defined(__sparc) && !defined(__sparc__) && ... */
 121 # error "Cannot determine endianness of your platform. Please add support to jscpucfg.h."
 122 #endif
 123
 124 #ifndef JS_STACK_GROWTH_DIRECTION
 125 # ifdef __hppa
 126 #  define JS_STACK_GROWTH_DIRECTION (1)
 127 # else
 128 #  define JS_STACK_GROWTH_DIRECTION (-1)
 129 # endif
 130 #endif
 131
 132 #endif /* jscpucfg_h */