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_DEC "%ld"
  68 # define HOST_WIDE_INT_PRINT_DEC_C "%ldL"
  69 # define HOST_WIDE_INT_PRINT_DEC_SPACE "% *ld"
  70 # define HOST_WIDE_INT_PRINT_UNSIGNED "%lu"
  71 # define HOST_WIDE_INT_PRINT_UNSIGNED_SPACE "% *lu"
  72 # define HOST_WIDE_INT_PRINT_HEX "0x%lx"
  73   /* 'long' might be 32 or 64 bits, and the number of leading zeroes
  74      must be tweaked accordingly.  */
  75 # if HOST_BITS_PER_WIDE_INT == 64
  76 #  define HOST_WIDE_INT_PRINT_DOUBLE_HEX "0x%lx%016lx"
  77 # else
  78 #  define HOST_WIDE_INT_PRINT_DOUBLE_HEX "0x%lx%08lx"
  79 # endif
  80 #else
  81 # define HOST_WIDE_INT_PRINT_DEC "%lld"
  82 # define HOST_WIDE_INT_PRINT_DEC_C "%lldLL"
  83 # define HOST_WIDE_INT_PRINT_DEC_SPACE "% *lld"
  84 # define HOST_WIDE_INT_PRINT_UNSIGNED "%llu"
  85 # define HOST_WIDE_INT_PRINT_UNSIGNED_SPACE "% *llu"
  86 # define HOST_WIDE_INT_PRINT_HEX "0x%llx"
  87   /* We can assume that 'long long' is at least 64 bits.  */
  88 # define HOST_WIDE_INT_PRINT_DOUBLE_HEX "0x%llx%016llx"
  89 #endif
  90
  91 /* Set HOST_WIDEST_INT.  This is a 64-bit type unless the compiler
  92    in use has no 64-bit type at all; in that case it's 32 bits.  */
  93
  94 #if HOST_BITS_PER_WIDE_INT >= 64 \
  95     || (HOST_BITS_PER_LONGLONG < 64 && HOST_BITS_PER___INT64 < 64)
  96 # define HOST_WIDEST_INT                      HOST_WIDE_INT
  97 # define HOST_BITS_PER_WIDEST_INT             HOST_BITS_PER_WIDE_INT
  98 # define HOST_WIDEST_INT_PRINT_DEC            HOST_WIDE_INT_PRINT_DEC
  99 # define HOST_WIDEST_INT_PRINT_DEC_C          HOST_WIDE_INT_PRINT_DEC_C
 100 # define HOST_WIDEST_INT_PRINT_DEC_SPACE      HOST_WIDE_INT_PRINT_DEC_SPACE
 101 # define HOST_WIDEST_INT_PRINT_UNSIGNED       HOST_WIDE_INT_PRINT_UNSIGNED
 102 # define HOST_WIDEST_INT_PRINT_UNSIGNED_SPACE HOST_WIDE_INT_PRINT_UNSIGNED_SPACE
 103 # define HOST_WIDEST_INT_PRINT_HEX            HOST_WIDE_INT_PRINT_HEX
 104 # define HOST_WIDEST_INT_PRINT_DOUBLE_HEX     HOST_WIDE_INT_PRINT_DOUBLE_HEX
 105 #else
 106 # if HOST_BITS_PER_LONGLONG >= 64
 107 #  define HOST_BITS_PER_WIDEST_INT            HOST_BITS_PER_LONGLONG
 108 #  define HOST_WIDEST_INT                     long long
 109 # else
 110 #  if HOST_BITS_PER___INT64 >= 64
 111 #   define HOST_BITS_PER_WIDEST_INT           HOST_BITS_PER___INT64
 112 #   define HOST_WIDEST_INT                    __int64
 113 #  else
 114     #error "This line should be impossible to reach"
 115 #  endif
 116 # endif
 117 # define HOST_WIDEST_INT_PRINT_DEC            "%lld"
 118 # define HOST_WIDEST_INT_PRINT_DEC_C          "%lldLL"
 119 # define HOST_WIDEST_INT_PRINT_DEC_SPACE      "% *lld"
 120 # define HOST_WIDEST_INT_PRINT_UNSIGNED       "%llu"
 121 # define HOST_WIDEST_INT_PRINT_UNSIGNED_SPACE "% *llu"
 122 # define HOST_WIDEST_INT_PRINT_HEX            "0x%llx"
 123 # define HOST_WIDEST_INT_PRINT_DOUBLE_HEX     "0x%llx%016llx"
 124 #endif
 125
 126 #endif /* ! GCC_HWINT_H */