gcc/hwint.h

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