float.h (6583B) - Raw
1 /*===---- float.h - Characteristics of floating point types ----------------=== 2 * 3 * Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 * See https://llvm.org/LICENSE.txt for license information. 5 * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 * 7 *===-----------------------------------------------------------------------=== 8 */ 9 10 #ifndef __CLANG_FLOAT_H 11 #define __CLANG_FLOAT_H 12 13 #if defined(__MVS__) && __has_include_next(<float.h>) 14 #include_next <float.h> 15 #else 16 17 /* If we're on MinGW, fall back to the system's float.h, which might have 18 * additional definitions provided for Windows. 19 * For more details see http://msdn.microsoft.com/en-us/library/y0ybw9fy.aspx 20 * 21 * Also fall back on Darwin and AIX to allow additional definitions and 22 * implementation-defined values. 23 */ 24 #if (defined(__APPLE__) || defined(__MINGW32__) || defined(_MSC_VER) || \ 25 defined(_AIX)) && \ 26 __STDC_HOSTED__ && __has_include_next(<float.h>) 27 28 /* Prior to Apple's 10.7 SDK, float.h SDK header used to apply an extra level 29 * of #include_next<float.h> to keep Metrowerks compilers happy. Avoid this 30 * extra indirection. 31 */ 32 #ifdef __APPLE__ 33 #define _FLOAT_H_ 34 #endif 35 36 # include_next <float.h> 37 38 /* Undefine anything that we'll be redefining below. */ 39 # undef FLT_EVAL_METHOD 40 # undef FLT_ROUNDS 41 # undef FLT_RADIX 42 # undef FLT_MANT_DIG 43 # undef DBL_MANT_DIG 44 # undef LDBL_MANT_DIG 45 #if (defined(__STDC_VERSION__) && __STDC_VERSION__ >= 199901L) || \ 46 !defined(__STRICT_ANSI__) || \ 47 (defined(__cplusplus) && __cplusplus >= 201103L) || \ 48 (__STDC_HOSTED__ && defined(_AIX) && defined(_ALL_SOURCE)) 49 # undef DECIMAL_DIG 50 # endif 51 # undef FLT_DIG 52 # undef DBL_DIG 53 # undef LDBL_DIG 54 # undef FLT_MIN_EXP 55 # undef DBL_MIN_EXP 56 # undef LDBL_MIN_EXP 57 # undef FLT_MIN_10_EXP 58 # undef DBL_MIN_10_EXP 59 # undef LDBL_MIN_10_EXP 60 # undef FLT_MAX_EXP 61 # undef DBL_MAX_EXP 62 # undef LDBL_MAX_EXP 63 # undef FLT_MAX_10_EXP 64 # undef DBL_MAX_10_EXP 65 # undef LDBL_MAX_10_EXP 66 # undef FLT_MAX 67 # undef DBL_MAX 68 # undef LDBL_MAX 69 # undef FLT_EPSILON 70 # undef DBL_EPSILON 71 # undef LDBL_EPSILON 72 # undef FLT_MIN 73 # undef DBL_MIN 74 # undef LDBL_MIN 75 #if (defined(__STDC_VERSION__) && __STDC_VERSION__ >= 201112L) || \ 76 !defined(__STRICT_ANSI__) || \ 77 (defined(__cplusplus) && __cplusplus >= 201703L) || \ 78 (__STDC_HOSTED__ && defined(_AIX) && defined(_ALL_SOURCE)) 79 # undef FLT_TRUE_MIN 80 # undef DBL_TRUE_MIN 81 # undef LDBL_TRUE_MIN 82 # undef FLT_DECIMAL_DIG 83 # undef DBL_DECIMAL_DIG 84 # undef LDBL_DECIMAL_DIG 85 # undef FLT_HAS_SUBNORM 86 # undef DBL_HAS_SUBNORM 87 # undef LDBL_HAS_SUBNORM 88 # endif 89 #if (defined(__STDC_VERSION__) && __STDC_VERSION__ >= 202311L) || \ 90 !defined(__STRICT_ANSI__) 91 # undef FLT_NORM_MAX 92 # undef DBL_NORM_MAX 93 # undef LDBL_NORM_MAX 94 #endif 95 #endif 96 97 #if (defined(__STDC_VERSION__) && __STDC_VERSION__ >= 202311L) || \ 98 !defined(__STRICT_ANSI__) 99 # undef INFINITY 100 # undef NAN 101 #endif 102 103 /* Characteristics of floating point types, C99 5.2.4.2.2 */ 104 105 #if (defined(__STDC_VERSION__) && __STDC_VERSION__ >= 199901L) || \ 106 (defined(__cplusplus) && __cplusplus >= 201103L) 107 #define FLT_EVAL_METHOD __FLT_EVAL_METHOD__ 108 #endif 109 #define FLT_ROUNDS (__builtin_flt_rounds()) 110 #define FLT_RADIX __FLT_RADIX__ 111 112 #define FLT_MANT_DIG __FLT_MANT_DIG__ 113 #define DBL_MANT_DIG __DBL_MANT_DIG__ 114 #define LDBL_MANT_DIG __LDBL_MANT_DIG__ 115 116 #if (defined(__STDC_VERSION__) && __STDC_VERSION__ >= 199901L) || \ 117 !defined(__STRICT_ANSI__) || \ 118 (defined(__cplusplus) && __cplusplus >= 201103L) || \ 119 (__STDC_HOSTED__ && defined(_AIX) && defined(_ALL_SOURCE)) 120 # define DECIMAL_DIG __DECIMAL_DIG__ 121 #endif 122 123 #define FLT_DIG __FLT_DIG__ 124 #define DBL_DIG __DBL_DIG__ 125 #define LDBL_DIG __LDBL_DIG__ 126 127 #define FLT_MIN_EXP __FLT_MIN_EXP__ 128 #define DBL_MIN_EXP __DBL_MIN_EXP__ 129 #define LDBL_MIN_EXP __LDBL_MIN_EXP__ 130 131 #define FLT_MIN_10_EXP __FLT_MIN_10_EXP__ 132 #define DBL_MIN_10_EXP __DBL_MIN_10_EXP__ 133 #define LDBL_MIN_10_EXP __LDBL_MIN_10_EXP__ 134 135 #define FLT_MAX_EXP __FLT_MAX_EXP__ 136 #define DBL_MAX_EXP __DBL_MAX_EXP__ 137 #define LDBL_MAX_EXP __LDBL_MAX_EXP__ 138 139 #define FLT_MAX_10_EXP __FLT_MAX_10_EXP__ 140 #define DBL_MAX_10_EXP __DBL_MAX_10_EXP__ 141 #define LDBL_MAX_10_EXP __LDBL_MAX_10_EXP__ 142 143 #define FLT_MAX __FLT_MAX__ 144 #define DBL_MAX __DBL_MAX__ 145 #define LDBL_MAX __LDBL_MAX__ 146 147 #define FLT_EPSILON __FLT_EPSILON__ 148 #define DBL_EPSILON __DBL_EPSILON__ 149 #define LDBL_EPSILON __LDBL_EPSILON__ 150 151 #define FLT_MIN __FLT_MIN__ 152 #define DBL_MIN __DBL_MIN__ 153 #define LDBL_MIN __LDBL_MIN__ 154 155 #if (defined(__STDC_VERSION__) && __STDC_VERSION__ >= 201112L) || \ 156 !defined(__STRICT_ANSI__) || \ 157 (defined(__cplusplus) && __cplusplus >= 201703L) || \ 158 (__STDC_HOSTED__ && defined(_AIX) && defined(_ALL_SOURCE)) 159 # define FLT_TRUE_MIN __FLT_DENORM_MIN__ 160 # define DBL_TRUE_MIN __DBL_DENORM_MIN__ 161 # define LDBL_TRUE_MIN __LDBL_DENORM_MIN__ 162 # define FLT_DECIMAL_DIG __FLT_DECIMAL_DIG__ 163 # define DBL_DECIMAL_DIG __DBL_DECIMAL_DIG__ 164 # define LDBL_DECIMAL_DIG __LDBL_DECIMAL_DIG__ 165 # define FLT_HAS_SUBNORM __FLT_HAS_DENORM__ 166 # define DBL_HAS_SUBNORM __DBL_HAS_DENORM__ 167 # define LDBL_HAS_SUBNORM __LDBL_HAS_DENORM__ 168 #endif 169 170 #if (defined(__STDC_VERSION__) && __STDC_VERSION__ >= 202311L) || \ 171 !defined(__STRICT_ANSI__) 172 /* C23 5.2.5.3.3p29-30 */ 173 # define INFINITY (__builtin_inff()) 174 # define NAN (__builtin_nanf("")) 175 /* C23 5.2.5.3.3p32 */ 176 # define FLT_NORM_MAX __FLT_NORM_MAX__ 177 # define DBL_NORM_MAX __DBL_NORM_MAX__ 178 # define LDBL_NORM_MAX __LDBL_NORM_MAX__ 179 #endif 180 181 #ifdef __STDC_WANT_IEC_60559_TYPES_EXT__ 182 # define FLT16_MANT_DIG __FLT16_MANT_DIG__ 183 # define FLT16_DECIMAL_DIG __FLT16_DECIMAL_DIG__ 184 # define FLT16_DIG __FLT16_DIG__ 185 # define FLT16_MIN_EXP __FLT16_MIN_EXP__ 186 # define FLT16_MIN_10_EXP __FLT16_MIN_10_EXP__ 187 # define FLT16_MAX_EXP __FLT16_MAX_EXP__ 188 # define FLT16_MAX_10_EXP __FLT16_MAX_10_EXP__ 189 # define FLT16_MAX __FLT16_MAX__ 190 # define FLT16_EPSILON __FLT16_EPSILON__ 191 # define FLT16_MIN __FLT16_MIN__ 192 # define FLT16_TRUE_MIN __FLT16_TRUE_MIN__ 193 #endif /* __STDC_WANT_IEC_60559_TYPES_EXT__ */ 194 195 #endif /* __MVS__ */ 196 #endif /* __CLANG_FLOAT_H */