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1 /*===---- float.h - Characteristics of floating point types ----------------===
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2 *
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3 * Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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4 * See https://llvm.org/LICENSE.txt for license information.
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5 * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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6 *
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7 *===-----------------------------------------------------------------------===
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8 */
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9
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10 #ifndef __CLANG_FLOAT_H
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11 #define __CLANG_FLOAT_H
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12
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13 /* If we're on MinGW, fall back to the system's float.h, which might have
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14 * additional definitions provided for Windows.
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15 * For more details see http://msdn.microsoft.com/en-us/library/y0ybw9fy.aspx
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16 *
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17 * Also fall back on Darwin to allow additional definitions and
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18 * implementation-defined values.
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19 */
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20 #if (defined(__APPLE__) || (defined(__MINGW32__) || defined(_MSC_VER))) && \
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21 __STDC_HOSTED__ && __has_include_next(<float.h>)
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22
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23 /* Prior to Apple's 10.7 SDK, float.h SDK header used to apply an extra level
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24 * of #include_next<float.h> to keep Metrowerks compilers happy. Avoid this
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25 * extra indirection.
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26 */
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27 #ifdef __APPLE__
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28 #define _FLOAT_H_
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29 #endif
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30
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31 # include_next <float.h>
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32
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33 /* Undefine anything that we'll be redefining below. */
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34 # undef FLT_EVAL_METHOD
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35 # undef FLT_ROUNDS
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36 # undef FLT_RADIX
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37 # undef FLT_MANT_DIG
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38 # undef DBL_MANT_DIG
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39 # undef LDBL_MANT_DIG
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40 # if __STDC_VERSION__ >= 199901L || !defined(__STRICT_ANSI__) || __cplusplus >= 201103L
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41 # undef DECIMAL_DIG
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42 # endif
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43 # undef FLT_DIG
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44 # undef DBL_DIG
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45 # undef LDBL_DIG
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46 # undef FLT_MIN_EXP
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47 # undef DBL_MIN_EXP
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48 # undef LDBL_MIN_EXP
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49 # undef FLT_MIN_10_EXP
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50 # undef DBL_MIN_10_EXP
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51 # undef LDBL_MIN_10_EXP
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52 # undef FLT_MAX_EXP
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53 # undef DBL_MAX_EXP
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54 # undef LDBL_MAX_EXP
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55 # undef FLT_MAX_10_EXP
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56 # undef DBL_MAX_10_EXP
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57 # undef LDBL_MAX_10_EXP
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58 # undef FLT_MAX
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59 # undef DBL_MAX
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60 # undef LDBL_MAX
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61 # undef FLT_EPSILON
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62 # undef DBL_EPSILON
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63 # undef LDBL_EPSILON
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64 # undef FLT_MIN
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65 # undef DBL_MIN
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66 # undef LDBL_MIN
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67 # if __STDC_VERSION__ >= 201112L || !defined(__STRICT_ANSI__) || __cplusplus >= 201703L
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68 # undef FLT_TRUE_MIN
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69 # undef DBL_TRUE_MIN
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70 # undef LDBL_TRUE_MIN
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71 # undef FLT_DECIMAL_DIG
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72 # undef DBL_DECIMAL_DIG
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73 # undef LDBL_DECIMAL_DIG
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74 # undef FLT_HAS_SUBNORM
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75 # undef DBL_HAS_SUBNORM
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76 # undef LDBL_HAS_SUBNORM
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77 # endif
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78 #endif
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79
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80 /* Characteristics of floating point types, C99 5.2.4.2.2 */
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81
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82 #define FLT_EVAL_METHOD __FLT_EVAL_METHOD__
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83 #define FLT_ROUNDS (__builtin_flt_rounds())
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84 #define FLT_RADIX __FLT_RADIX__
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85
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86 #define FLT_MANT_DIG __FLT_MANT_DIG__
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87 #define DBL_MANT_DIG __DBL_MANT_DIG__
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88 #define LDBL_MANT_DIG __LDBL_MANT_DIG__
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89
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90 #if __STDC_VERSION__ >= 199901L || !defined(__STRICT_ANSI__) || __cplusplus >= 201103L
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91 # define DECIMAL_DIG __DECIMAL_DIG__
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92 #endif
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93
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94 #define FLT_DIG __FLT_DIG__
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95 #define DBL_DIG __DBL_DIG__
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96 #define LDBL_DIG __LDBL_DIG__
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97
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98 #define FLT_MIN_EXP __FLT_MIN_EXP__
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99 #define DBL_MIN_EXP __DBL_MIN_EXP__
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100 #define LDBL_MIN_EXP __LDBL_MIN_EXP__
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101
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102 #define FLT_MIN_10_EXP __FLT_MIN_10_EXP__
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103 #define DBL_MIN_10_EXP __DBL_MIN_10_EXP__
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104 #define LDBL_MIN_10_EXP __LDBL_MIN_10_EXP__
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105
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106 #define FLT_MAX_EXP __FLT_MAX_EXP__
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107 #define DBL_MAX_EXP __DBL_MAX_EXP__
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108 #define LDBL_MAX_EXP __LDBL_MAX_EXP__
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109
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110 #define FLT_MAX_10_EXP __FLT_MAX_10_EXP__
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111 #define DBL_MAX_10_EXP __DBL_MAX_10_EXP__
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112 #define LDBL_MAX_10_EXP __LDBL_MAX_10_EXP__
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113
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114 #define FLT_MAX __FLT_MAX__
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115 #define DBL_MAX __DBL_MAX__
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116 #define LDBL_MAX __LDBL_MAX__
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117
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118 #define FLT_EPSILON __FLT_EPSILON__
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119 #define DBL_EPSILON __DBL_EPSILON__
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120 #define LDBL_EPSILON __LDBL_EPSILON__
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121
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122 #define FLT_MIN __FLT_MIN__
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123 #define DBL_MIN __DBL_MIN__
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124 #define LDBL_MIN __LDBL_MIN__
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125
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126 #if __STDC_VERSION__ >= 201112L || !defined(__STRICT_ANSI__) || __cplusplus >= 201703L
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127 # define FLT_TRUE_MIN __FLT_DENORM_MIN__
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128 # define DBL_TRUE_MIN __DBL_DENORM_MIN__
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129 # define LDBL_TRUE_MIN __LDBL_DENORM_MIN__
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130 # define FLT_DECIMAL_DIG __FLT_DECIMAL_DIG__
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131 # define DBL_DECIMAL_DIG __DBL_DECIMAL_DIG__
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132 # define LDBL_DECIMAL_DIG __LDBL_DECIMAL_DIG__
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133 # define FLT_HAS_SUBNORM __FLT_HAS_DENORM__
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134 # define DBL_HAS_SUBNORM __DBL_HAS_DENORM__
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135 # define LDBL_HAS_SUBNORM __LDBL_HAS_DENORM__
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136 #endif
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137
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138 #ifdef __STDC_WANT_IEC_60559_TYPES_EXT__
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139 # define FLT16_MANT_DIG __FLT16_MANT_DIG__
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140 # define FLT16_DECIMAL_DIG __FLT16_DECIMAL_DIG__
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141 # define FLT16_DIG __FLT16_DIG__
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142 # define FLT16_MIN_EXP __FLT16_MIN_EXP__
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143 # define FLT16_MIN_10_EXP __FLT16_MIN_10_EXP__
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144 # define FLT16_MAX_EXP __FLT16_MAX_EXP__
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145 # define FLT16_MAX_10_EXP __FLT16_MAX_10_EXP__
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146 # define FLT16_MAX __FLT16_MAX__
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147 # define FLT16_EPSILON __FLT16_EPSILON__
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148 # define FLT16_MIN __FLT16_MIN__
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149 # define FLT16_TRUE_MIN __FLT16_TRUE_MIN__
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150 #endif /* __STDC_WANT_IEC_60559_TYPES_EXT__ */
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151
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152 #endif /* __CLANG_FLOAT_H */
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