gcc/hwint.h

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