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