gcc/hwint.h

   1 /* HOST_WIDE_INT definitions for the GNU compiler.
   2    Copyright (C) 1998, 2002, 2004, 2008, 2009 Free Software Foundation, Inc.
   3
   4    This file is part of GCC.
   5
   6    Provide definitions for macros which depend on HOST_BITS_PER_INT
   7    and HOST_BITS_PER_LONG.  */
   8
   9 #ifndef GCC_HWINT_H
  10 #define GCC_HWINT_H
  11
  12 /* This describes the machine the compiler is hosted on.  */
  13 #define HOST_BITS_PER_CHAR  CHAR_BIT
  14 #define HOST_BITS_PER_SHORT (CHAR_BIT * SIZEOF_SHORT)
  15 #define HOST_BITS_PER_INT   (CHAR_BIT * SIZEOF_INT)
  16 #define HOST_BITS_PER_LONG  (CHAR_BIT * SIZEOF_LONG)
  17
  18 /* The string that should be inserted into a printf style format to
  19    indicate a "long" operand.  */
  20 #ifndef HOST_LONG_FORMAT
  21 #define HOST_LONG_FORMAT "l"
  22 #endif
  23
  24 /* The string that should be inserted into a printf style format to
  25    indicate a "long long" operand.  */
  26 #ifndef HOST_LONG_LONG_FORMAT
  27 #define HOST_LONG_LONG_FORMAT "ll"
  28 #endif
  29
  30 /* If HAVE_LONG_LONG and SIZEOF_LONG_LONG aren't defined, but
  31    GCC_VERSION >= 3000, assume this is the second or later stage of a
  32    bootstrap, we do have long long, and it's 64 bits.  (This is
  33    required by C99; we do have some ports that violate that assumption
  34    but they're all cross-compile-only.)  Just in case, force a
  35    constraint violation if that assumption is incorrect.  */
  36 #if !defined HAVE_LONG_LONG
  37 # if GCC_VERSION >= 3000
  38 #  define HAVE_LONG_LONG 1
  39 #  define SIZEOF_LONG_LONG 8
  40 extern char sizeof_long_long_must_be_8[sizeof(long long) == 8 ? 1 : -1];
  41 # endif
  42 #endif
  43
  44 #ifdef HAVE_LONG_LONG
  45 # define HOST_BITS_PER_LONGLONG (CHAR_BIT * SIZEOF_LONG_LONG)
  46 #endif
  47 #ifdef HAVE___INT64
  48 # define HOST_BITS_PER___INT64 (CHAR_BIT * SIZEOF___INT64)
  49 #endif
  50
  51 /* Set HOST_WIDE_INT.  This should be the widest efficient host
  52    integer type.  It can be 32 or 64 bits, except that if we are
  53    targeting a machine with 64-bit size_t then it has to be 64 bits.
  54
  55    With a sane ABI, 'long' is the largest efficient host integer type.
  56    Thus, we use that unless we have to use 'long long' or '__int64'
  57    because we're targeting a 64-bit machine from a 32-bit host.  */
  58
  59 #if HOST_BITS_PER_LONG >= 64 || !defined NEED_64BIT_HOST_WIDE_INT
  60 #   define HOST_BITS_PER_WIDE_INT HOST_BITS_PER_LONG
  61 #   define HOST_WIDE_INT long
  62 #else
  63 # if HOST_BITS_PER_LONGLONG >= 64
  64 #   define HOST_BITS_PER_WIDE_INT HOST_BITS_PER_LONGLONG
  65 #   define HOST_WIDE_INT long long
  66 # else
  67 #  if HOST_BITS_PER___INT64 >= 64
  68 #   define HOST_BITS_PER_WIDE_INT HOST_BITS_PER___INT64
  69 #   define HOST_WIDE_INT __int64
  70 #  else
  71     #error "Unable to find a suitable type for HOST_WIDE_INT"
  72 #  endif
  73 # endif
  74 #endif
  75
  76 /* Various printf format strings for HOST_WIDE_INT.  */
  77
  78 #if HOST_BITS_PER_WIDE_INT == HOST_BITS_PER_LONG
  79 # define HOST_WIDE_INT_PRINT HOST_LONG_FORMAT
  80 # define HOST_WIDE_INT_PRINT_C "L"
  81   /* 'long' might be 32 or 64 bits, and the number of leading zeroes
  82      must be tweaked accordingly.  */
  83 # if HOST_BITS_PER_WIDE_INT == 64
  84 #  define HOST_WIDE_INT_PRINT_DOUBLE_HEX \
  85      "0x%" HOST_LONG_FORMAT "x%016" HOST_LONG_FORMAT "x"
  86 # else
  87 #  define HOST_WIDE_INT_PRINT_DOUBLE_HEX \
  88      "0x%" HOST_LONG_FORMAT "x%08" HOST_LONG_FORMAT "x"
  89 # endif
  90 #else
  91 # define HOST_WIDE_INT_PRINT HOST_LONG_LONG_FORMAT
  92 # define HOST_WIDE_INT_PRINT_C "LL"
  93   /* We can assume that 'long long' is at least 64 bits.  */
  94 # define HOST_WIDE_INT_PRINT_DOUBLE_HEX \
  95     "0x%" HOST_LONG_LONG_FORMAT "x%016" HOST_LONG_LONG_FORMAT "x"
  96 #endif /* HOST_BITS_PER_WIDE_INT == HOST_BITS_PER_LONG */
  97
  98 #define HOST_WIDE_INT_PRINT_DEC "%" HOST_WIDE_INT_PRINT "d"
  99 #define HOST_WIDE_INT_PRINT_DEC_C HOST_WIDE_INT_PRINT_DEC HOST_WIDE_INT_PRINT_C
 100 #define HOST_WIDE_INT_PRINT_UNSIGNED "%" HOST_WIDE_INT_PRINT "u"
 101 #define HOST_WIDE_INT_PRINT_HEX "%#" HOST_WIDE_INT_PRINT "x"
 102
 103 /* Set HOST_WIDEST_INT.  This is a 64-bit type unless the compiler
 104    in use has no 64-bit type at all; in that case it's 32 bits.  */
 105
 106 #if HOST_BITS_PER_WIDE_INT >= 64 \
 107     || (HOST_BITS_PER_LONGLONG < 64 && HOST_BITS_PER___INT64 < 64)
 108 # define HOST_WIDEST_INT                      HOST_WIDE_INT
 109 # define HOST_BITS_PER_WIDEST_INT             HOST_BITS_PER_WIDE_INT
 110 # define HOST_WIDEST_INT_PRINT                HOST_WIDE_INT_PRINT
 111 # define HOST_WIDEST_INT_PRINT_DEC            HOST_WIDE_INT_PRINT_DEC
 112 # define HOST_WIDEST_INT_PRINT_DEC_C          HOST_WIDE_INT_PRINT_DEC_C
 113 # define HOST_WIDEST_INT_PRINT_UNSIGNED       HOST_WIDE_INT_PRINT_UNSIGNED
 114 # define HOST_WIDEST_INT_PRINT_HEX            HOST_WIDE_INT_PRINT_HEX
 115 # define HOST_WIDEST_INT_PRINT_DOUBLE_HEX     HOST_WIDE_INT_PRINT_DOUBLE_HEX
 116 #else
 117 # if HOST_BITS_PER_LONGLONG >= 64
 118 #  define HOST_BITS_PER_WIDEST_INT            HOST_BITS_PER_LONGLONG
 119 #  define HOST_WIDEST_INT                     long long
 120 # else
 121 #  if HOST_BITS_PER___INT64 >= 64
 122 #   define HOST_BITS_PER_WIDEST_INT           HOST_BITS_PER___INT64
 123 #   define HOST_WIDEST_INT                    __int64
 124 #  else
 125     #error "This line should be impossible to reach"
 126 #  endif
 127 # endif
 128 # define HOST_WIDEST_INT_PRINT                HOST_LONG_LONG_FORMAT
 129 # define HOST_WIDEST_INT_PRINT_DEC            "%" HOST_LONG_LONG_FORMAT "d"
 130 # define HOST_WIDEST_INT_PRINT_DEC_C          "%" HOST_LONG_LONG_FORMAT "dLL"
 131 # define HOST_WIDEST_INT_PRINT_UNSIGNED       "%" HOST_LONG_LONG_FORMAT "u"
 132 # define HOST_WIDEST_INT_PRINT_HEX            "%#" HOST_LONG_LONG_FORMAT "x"
 133 # define HOST_WIDEST_INT_PRINT_DOUBLE_HEX     \
 134     "0x%" HOST_LONG_LONG_FORMAT "x%016" HOST_LONG_LONG_FORMAT "x"
 135 #endif
 136
 137 /* Define HOST_WIDEST_FAST_INT to the widest integer type supported
 138    efficiently in hardware.  (That is, the widest integer type that fits
 139    in a hardware register.)  Normally this is "long" but on some hosts it
 140    should be "long long" or "__int64".  This is no convenient way to
 141    autodetect this, so such systems must set a flag in config.host; see there
 142    for details.  */
 143
 144 #ifdef USE_LONG_LONG_FOR_WIDEST_FAST_INT
 145 #  ifdef HAVE_LONG_LONG
 146 #    define HOST_WIDEST_FAST_INT long long
 147 #    define HOST_BITS_PER_WIDEST_FAST_INT HOST_BITS_PER_LONGLONG
 148 #  elif defined (HAVE___INT64)
 149 #    define HOST_WIDEST_FAST_INT __int64
 150 #    define HOST_BITS_PER_WIDEST_FAST_INT HOST_BITS_PER___INT64
 151 #  else
 152 #    error "Your host said it wanted to use long long or __int64 but neither"
 153 #    error "exist"
 154 #  endif
 155 #else
 156 #  define HOST_WIDEST_FAST_INT long
 157 #  define HOST_BITS_PER_WIDEST_FAST_INT HOST_BITS_PER_LONG
 158 #endif
 159
 160 #endif /* ! GCC_HWINT_H */