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 __STDC_VERSION__ >= 199901L || !defined(__STRICT_ANSI__) || \ 42 __cplusplus >= 201103L || \ 43 (__STDC_HOSTED__ && defined(_AIX) && defined(_ALL_SOURCE)) 44 # undef DECIMAL_DIG 45 # endif 46 # undef FLT_DIG 47 # undef DBL_DIG 48 # undef LDBL_DIG 49 # undef FLT_MIN_EXP 50 # undef DBL_MIN_EXP 51 # undef LDBL_MIN_EXP 52 # undef FLT_MIN_10_EXP 53 # undef DBL_MIN_10_EXP 54 # undef LDBL_MIN_10_EXP 55 # undef FLT_MAX_EXP 56 # undef DBL_MAX_EXP 57 # undef LDBL_MAX_EXP 58 # undef FLT_MAX_10_EXP 59 # undef DBL_MAX_10_EXP 60 # undef LDBL_MAX_10_EXP 61 # undef FLT_MAX 62 # undef DBL_MAX 63 # undef LDBL_MAX 64 # undef FLT_EPSILON 65 # undef DBL_EPSILON 66 # undef LDBL_EPSILON 67 # undef FLT_MIN 68 # undef DBL_MIN 69 # undef LDBL_MIN 70 # if __STDC_VERSION__ >= 201112L || !defined(__STRICT_ANSI__) || \ 71 __cplusplus >= 201703L || \ 72 (__STDC_HOSTED__ && defined(_AIX) && defined(_ALL_SOURCE)) 73 # undef FLT_TRUE_MIN 74 # undef DBL_TRUE_MIN 75 # undef LDBL_TRUE_MIN 76 # undef FLT_DECIMAL_DIG 77 # undef DBL_DECIMAL_DIG 78 # undef LDBL_DECIMAL_DIG 79 # undef FLT_HAS_SUBNORM 80 # undef DBL_HAS_SUBNORM 81 # undef LDBL_HAS_SUBNORM 82 # endif 83 #endif 84 85 /* Characteristics of floating point types, C99 5.2.4.2.2 */ 86 87 #define FLT_EVAL_METHOD __FLT_EVAL_METHOD__ 88 #define FLT_ROUNDS (__builtin_flt_rounds()) 89 #define FLT_RADIX __FLT_RADIX__ 90 91 #define FLT_MANT_DIG __FLT_MANT_DIG__ 92 #define DBL_MANT_DIG __DBL_MANT_DIG__ 93 #define LDBL_MANT_DIG __LDBL_MANT_DIG__ 94 95 #if __STDC_VERSION__ >= 199901L || !defined(__STRICT_ANSI__) || \ 96 __cplusplus >= 201103L || \ 97 (__STDC_HOSTED__ && defined(_AIX) && defined(_ALL_SOURCE)) 98 # define DECIMAL_DIG __DECIMAL_DIG__ 99 #endif 100 101 #define FLT_DIG __FLT_DIG__ 102 #define DBL_DIG __DBL_DIG__ 103 #define LDBL_DIG __LDBL_DIG__ 104 105 #define FLT_MIN_EXP __FLT_MIN_EXP__ 106 #define DBL_MIN_EXP __DBL_MIN_EXP__ 107 #define LDBL_MIN_EXP __LDBL_MIN_EXP__ 108 109 #define FLT_MIN_10_EXP __FLT_MIN_10_EXP__ 110 #define DBL_MIN_10_EXP __DBL_MIN_10_EXP__ 111 #define LDBL_MIN_10_EXP __LDBL_MIN_10_EXP__ 112 113 #define FLT_MAX_EXP __FLT_MAX_EXP__ 114 #define DBL_MAX_EXP __DBL_MAX_EXP__ 115 #define LDBL_MAX_EXP __LDBL_MAX_EXP__ 116 117 #define FLT_MAX_10_EXP __FLT_MAX_10_EXP__ 118 #define DBL_MAX_10_EXP __DBL_MAX_10_EXP__ 119 #define LDBL_MAX_10_EXP __LDBL_MAX_10_EXP__ 120 121 #define FLT_MAX __FLT_MAX__ 122 #define DBL_MAX __DBL_MAX__ 123 #define LDBL_MAX __LDBL_MAX__ 124 125 #define FLT_EPSILON __FLT_EPSILON__ 126 #define DBL_EPSILON __DBL_EPSILON__ 127 #define LDBL_EPSILON __LDBL_EPSILON__ 128 129 #define FLT_MIN __FLT_MIN__ 130 #define DBL_MIN __DBL_MIN__ 131 #define LDBL_MIN __LDBL_MIN__ 132 133 #if __STDC_VERSION__ >= 201112L || !defined(__STRICT_ANSI__) || \ 134 __cplusplus >= 201703L || \ 135 (__STDC_HOSTED__ && defined(_AIX) && defined(_ALL_SOURCE)) 136 # define FLT_TRUE_MIN __FLT_DENORM_MIN__ 137 # define DBL_TRUE_MIN __DBL_DENORM_MIN__ 138 # define LDBL_TRUE_MIN __LDBL_DENORM_MIN__ 139 # define FLT_DECIMAL_DIG __FLT_DECIMAL_DIG__ 140 # define DBL_DECIMAL_DIG __DBL_DECIMAL_DIG__ 141 # define LDBL_DECIMAL_DIG __LDBL_DECIMAL_DIG__ 142 # define FLT_HAS_SUBNORM __FLT_HAS_DENORM__ 143 # define DBL_HAS_SUBNORM __DBL_HAS_DENORM__ 144 # define LDBL_HAS_SUBNORM __LDBL_HAS_DENORM__ 145 #endif 146 147 #ifdef __STDC_WANT_IEC_60559_TYPES_EXT__ 148 # define FLT16_MANT_DIG __FLT16_MANT_DIG__ 149 # define FLT16_DECIMAL_DIG __FLT16_DECIMAL_DIG__ 150 # define FLT16_DIG __FLT16_DIG__ 151 # define FLT16_MIN_EXP __FLT16_MIN_EXP__ 152 # define FLT16_MIN_10_EXP __FLT16_MIN_10_EXP__ 153 # define FLT16_MAX_EXP __FLT16_MAX_EXP__ 154 # define FLT16_MAX_10_EXP __FLT16_MAX_10_EXP__ 155 # define FLT16_MAX __FLT16_MAX__ 156 # define FLT16_EPSILON __FLT16_EPSILON__ 157 # define FLT16_MIN __FLT16_MIN__ 158 # define FLT16_TRUE_MIN __FLT16_TRUE_MIN__ 159 #endif /* __STDC_WANT_IEC_60559_TYPES_EXT__ */ 160 161 #endif /* __CLANG_FLOAT_H */ 162