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