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