Mercurial > hg > CbC > CbC_gcc
annotate gcc/ginclude/float.h @ 67:f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
| author | nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> |
|---|---|
| date | Tue, 22 Mar 2011 17:18:12 +0900 |
| parents | b7f97abdc517 |
| children | 04ced10e8804 |
| rev | line source |
|---|---|
|
67
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
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1 /* Copyright (C) 2002, 2007, 2008, 2009, 2010 Free Software Foundation, Inc. |
| 0 | 2 |
| 3 This file is part of GCC. | |
| 4 | |
| 5 GCC is free software; you can redistribute it and/or modify | |
| 6 it under the terms of the GNU General Public License as published by | |
| 7 the Free Software Foundation; either version 3, or (at your option) | |
| 8 any later version. | |
| 9 | |
| 10 GCC is distributed in the hope that it will be useful, | |
| 11 but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 13 GNU General Public License for more details. | |
| 14 | |
| 15 Under Section 7 of GPL version 3, you are granted additional | |
| 16 permissions described in the GCC Runtime Library Exception, version | |
| 17 3.1, as published by the Free Software Foundation. | |
| 18 | |
| 19 You should have received a copy of the GNU General Public License and | |
| 20 a copy of the GCC Runtime Library Exception along with this program; | |
| 21 see the files COPYING3 and COPYING.RUNTIME respectively. If not, see | |
| 22 <http://www.gnu.org/licenses/>. */ | |
| 23 | |
| 24 /* | |
| 25 * ISO C Standard: 5.2.4.2.2 Characteristics of floating types <float.h> | |
| 26 */ | |
| 27 | |
| 28 #ifndef _FLOAT_H___ | |
| 29 #define _FLOAT_H___ | |
| 30 | |
| 31 /* Radix of exponent representation, b. */ | |
| 32 #undef FLT_RADIX | |
| 33 #define FLT_RADIX __FLT_RADIX__ | |
| 34 | |
| 35 /* Number of base-FLT_RADIX digits in the significand, p. */ | |
| 36 #undef FLT_MANT_DIG | |
| 37 #undef DBL_MANT_DIG | |
| 38 #undef LDBL_MANT_DIG | |
| 39 #define FLT_MANT_DIG __FLT_MANT_DIG__ | |
| 40 #define DBL_MANT_DIG __DBL_MANT_DIG__ | |
| 41 #define LDBL_MANT_DIG __LDBL_MANT_DIG__ | |
| 42 | |
| 43 /* Number of decimal digits, q, such that any floating-point number with q | |
| 44 decimal digits can be rounded into a floating-point number with p radix b | |
| 45 digits and back again without change to the q decimal digits, | |
| 46 | |
| 47 p * log10(b) if b is a power of 10 | |
| 48 floor((p - 1) * log10(b)) otherwise | |
| 49 */ | |
| 50 #undef FLT_DIG | |
| 51 #undef DBL_DIG | |
| 52 #undef LDBL_DIG | |
| 53 #define FLT_DIG __FLT_DIG__ | |
| 54 #define DBL_DIG __DBL_DIG__ | |
| 55 #define LDBL_DIG __LDBL_DIG__ | |
| 56 | |
| 57 /* Minimum int x such that FLT_RADIX**(x-1) is a normalized float, emin */ | |
| 58 #undef FLT_MIN_EXP | |
| 59 #undef DBL_MIN_EXP | |
| 60 #undef LDBL_MIN_EXP | |
| 61 #define FLT_MIN_EXP __FLT_MIN_EXP__ | |
| 62 #define DBL_MIN_EXP __DBL_MIN_EXP__ | |
| 63 #define LDBL_MIN_EXP __LDBL_MIN_EXP__ | |
| 64 | |
| 65 /* Minimum negative integer such that 10 raised to that power is in the | |
| 66 range of normalized floating-point numbers, | |
| 67 | |
| 68 ceil(log10(b) * (emin - 1)) | |
| 69 */ | |
| 70 #undef FLT_MIN_10_EXP | |
| 71 #undef DBL_MIN_10_EXP | |
| 72 #undef LDBL_MIN_10_EXP | |
| 73 #define FLT_MIN_10_EXP __FLT_MIN_10_EXP__ | |
| 74 #define DBL_MIN_10_EXP __DBL_MIN_10_EXP__ | |
| 75 #define LDBL_MIN_10_EXP __LDBL_MIN_10_EXP__ | |
| 76 | |
| 77 /* Maximum int x such that FLT_RADIX**(x-1) is a representable float, emax. */ | |
| 78 #undef FLT_MAX_EXP | |
| 79 #undef DBL_MAX_EXP | |
| 80 #undef LDBL_MAX_EXP | |
| 81 #define FLT_MAX_EXP __FLT_MAX_EXP__ | |
| 82 #define DBL_MAX_EXP __DBL_MAX_EXP__ | |
| 83 #define LDBL_MAX_EXP __LDBL_MAX_EXP__ | |
| 84 | |
| 85 /* Maximum integer such that 10 raised to that power is in the range of | |
| 86 representable finite floating-point numbers, | |
| 87 | |
| 88 floor(log10((1 - b**-p) * b**emax)) | |
| 89 */ | |
| 90 #undef FLT_MAX_10_EXP | |
| 91 #undef DBL_MAX_10_EXP | |
| 92 #undef LDBL_MAX_10_EXP | |
| 93 #define FLT_MAX_10_EXP __FLT_MAX_10_EXP__ | |
| 94 #define DBL_MAX_10_EXP __DBL_MAX_10_EXP__ | |
| 95 #define LDBL_MAX_10_EXP __LDBL_MAX_10_EXP__ | |
| 96 | |
| 97 /* Maximum representable finite floating-point number, | |
| 98 | |
| 99 (1 - b**-p) * b**emax | |
| 100 */ | |
| 101 #undef FLT_MAX | |
| 102 #undef DBL_MAX | |
| 103 #undef LDBL_MAX | |
| 104 #define FLT_MAX __FLT_MAX__ | |
| 105 #define DBL_MAX __DBL_MAX__ | |
| 106 #define LDBL_MAX __LDBL_MAX__ | |
| 107 | |
| 108 /* The difference between 1 and the least value greater than 1 that is | |
| 109 representable in the given floating point type, b**1-p. */ | |
| 110 #undef FLT_EPSILON | |
| 111 #undef DBL_EPSILON | |
| 112 #undef LDBL_EPSILON | |
| 113 #define FLT_EPSILON __FLT_EPSILON__ | |
| 114 #define DBL_EPSILON __DBL_EPSILON__ | |
| 115 #define LDBL_EPSILON __LDBL_EPSILON__ | |
| 116 | |
| 117 /* Minimum normalized positive floating-point number, b**(emin - 1). */ | |
| 118 #undef FLT_MIN | |
| 119 #undef DBL_MIN | |
| 120 #undef LDBL_MIN | |
| 121 #define FLT_MIN __FLT_MIN__ | |
| 122 #define DBL_MIN __DBL_MIN__ | |
| 123 #define LDBL_MIN __LDBL_MIN__ | |
| 124 | |
| 125 /* Addition rounds to 0: zero, 1: nearest, 2: +inf, 3: -inf, -1: unknown. */ | |
| 126 /* ??? This is supposed to change with calls to fesetround in <fenv.h>. */ | |
| 127 #undef FLT_ROUNDS | |
| 128 #define FLT_ROUNDS 1 | |
| 129 | |
| 130 #if defined (__STDC_VERSION__) && __STDC_VERSION__ >= 199901L | |
| 131 /* The floating-point expression evaluation method. | |
| 132 -1 indeterminate | |
| 133 0 evaluate all operations and constants just to the range and | |
| 134 precision of the type | |
| 135 1 evaluate operations and constants of type float and double | |
| 136 to the range and precision of the double type, evaluate | |
| 137 long double operations and constants to the range and | |
| 138 precision of the long double type | |
| 139 2 evaluate all operations and constants to the range and | |
| 140 precision of the long double type | |
| 141 | |
| 142 ??? This ought to change with the setting of the fp control word; | |
| 143 the value provided by the compiler assumes the widest setting. */ | |
| 144 #undef FLT_EVAL_METHOD | |
| 145 #define FLT_EVAL_METHOD __FLT_EVAL_METHOD__ | |
| 146 | |
| 147 /* Number of decimal digits, n, such that any floating-point number in the | |
| 148 widest supported floating type with pmax radix b digits can be rounded | |
| 149 to a floating-point number with n decimal digits and back again without | |
| 150 change to the value, | |
| 151 | |
| 152 pmax * log10(b) if b is a power of 10 | |
| 153 ceil(1 + pmax * log10(b)) otherwise | |
| 154 */ | |
| 155 #undef DECIMAL_DIG | |
| 156 #define DECIMAL_DIG __DECIMAL_DIG__ | |
| 157 | |
| 158 #endif /* C99 */ | |
| 159 | |
|
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160 #if defined (__STDC_VERSION__) && __STDC_VERSION__ > 199901L |
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161 /* Versions of DECIMAL_DIG for each floating-point type. */ |
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162 #undef FLT_DECIMAL_DIG |
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163 #undef DBL_DECIMAL_DIG |
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164 #undef LDBL_DECIMAL_DIG |
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165 #define FLT_DECIMAL_DIG __FLT_DECIMAL_DIG__ |
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166 #define DBL_DECIMAL_DIG __DBL_DECIMAL_DIG__ |
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167 #define LDBL_DECIMAL_DIG __DECIMAL_DIG__ |
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168 |
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169 /* Whether types support subnormal numbers. */ |
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170 #undef FLT_HAS_SUBNORM |
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171 #undef DBL_HAS_SUBNORM |
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172 #undef LDBL_HAS_SUBNORM |
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173 #define FLT_HAS_SUBNORM __FLT_HAS_DENORM__ |
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174 #define DBL_HAS_SUBNORM __DBL_HAS_DENORM__ |
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175 #define LDBL_HAS_SUBNORM __LDBL_HAS_DENORM__ |
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176 |
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177 /* Minimum positive values, including subnormals. */ |
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178 #undef FLT_TRUE_MIN |
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179 #undef DBL_TRUE_MIN |
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180 #undef LDBL_TRUE_MIN |
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181 #if __FLT_HAS_DENORM__ |
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182 #define FLT_TRUE_MIN __FLT_DENORM_MIN__ |
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183 #else |
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184 #define FLT_TRUE_MIN __FLT_MIN__ |
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185 #endif |
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186 #if __DBL_HAS_DENORM__ |
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187 #define DBL_TRUE_MIN __DBL_DENORM_MIN__ |
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188 #else |
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189 #define DBL_TRUE_MIN __DBL_MIN__ |
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190 #endif |
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191 #if __LDBL_HAS_DENORM__ |
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192 #define LDBL_TRUE_MIN __LDBL_DENORM_MIN__ |
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193 #else |
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194 #define LDBL_TRUE_MIN __LDBL_MIN__ |
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195 #endif |
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196 |
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197 #endif /* C1X */ |
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198 |
| 0 | 199 #ifdef __STDC_WANT_DEC_FP__ |
| 200 /* Draft Technical Report 24732, extension for decimal floating-point | |
| 201 arithmetic: Characteristic of decimal floating types <float.h>. */ | |
| 202 | |
| 203 /* Number of base-FLT_RADIX digits in the significand, p. */ | |
| 204 #undef DEC32_MANT_DIG | |
| 205 #undef DEC64_MANT_DIG | |
| 206 #undef DEC128_MANT_DIG | |
| 207 #define DEC32_MANT_DIG __DEC32_MANT_DIG__ | |
| 208 #define DEC64_MANT_DIG __DEC64_MANT_DIG__ | |
| 209 #define DEC128_MANT_DIG __DEC128_MANT_DIG__ | |
| 210 | |
| 211 /* Minimum exponent. */ | |
| 212 #undef DEC32_MIN_EXP | |
| 213 #undef DEC64_MIN_EXP | |
| 214 #undef DEC128_MIN_EXP | |
| 215 #define DEC32_MIN_EXP __DEC32_MIN_EXP__ | |
| 216 #define DEC64_MIN_EXP __DEC64_MIN_EXP__ | |
| 217 #define DEC128_MIN_EXP __DEC128_MIN_EXP__ | |
| 218 | |
| 219 /* Maximum exponent. */ | |
| 220 #undef DEC32_MAX_EXP | |
| 221 #undef DEC64_MAX_EXP | |
| 222 #undef DEC128_MAX_EXP | |
| 223 #define DEC32_MAX_EXP __DEC32_MAX_EXP__ | |
| 224 #define DEC64_MAX_EXP __DEC64_MAX_EXP__ | |
| 225 #define DEC128_MAX_EXP __DEC128_MAX_EXP__ | |
| 226 | |
| 227 /* Maximum representable finite decimal floating-point number | |
| 228 (there are 6, 15, and 33 9s after the decimal points respectively). */ | |
| 229 #undef DEC32_MAX | |
| 230 #undef DEC64_MAX | |
| 231 #undef DEC128_MAX | |
| 232 #define DEC32_MAX __DEC32_MAX__ | |
| 233 #define DEC64_MAX __DEC64_MAX__ | |
| 234 #define DEC128_MAX __DEC128_MAX__ | |
| 235 | |
| 236 /* The difference between 1 and the least value greater than 1 that is | |
| 237 representable in the given floating point type. */ | |
| 238 #undef DEC32_EPSILON | |
| 239 #undef DEC64_EPSILON | |
| 240 #undef DEC128_EPSILON | |
| 241 #define DEC32_EPSILON __DEC32_EPSILON__ | |
| 242 #define DEC64_EPSILON __DEC64_EPSILON__ | |
| 243 #define DEC128_EPSILON __DEC128_EPSILON__ | |
| 244 | |
| 245 /* Minimum normalized positive floating-point number. */ | |
| 246 #undef DEC32_MIN | |
| 247 #undef DEC64_MIN | |
| 248 #undef DEC128_MIN | |
| 249 #define DEC32_MIN __DEC32_MIN__ | |
| 250 #define DEC64_MIN __DEC64_MIN__ | |
| 251 #define DEC128_MIN __DEC128_MIN__ | |
| 252 | |
| 253 /* Minimum subnormal positive floating-point number. */ | |
| 254 #undef DEC32_SUBNORMAL_MIN | |
| 255 #undef DEC64_SUBNORMAL_MIN | |
| 256 #undef DEC128_SUBNORMAL_MIN | |
| 257 #define DEC32_SUBNORMAL_MIN __DEC32_SUBNORMAL_MIN__ | |
| 258 #define DEC64_SUBNORMAL_MIN __DEC64_SUBNORMAL_MIN__ | |
| 259 #define DEC128_SUBNORMAL_MIN __DEC128_SUBNORMAL_MIN__ | |
| 260 | |
| 261 /* The floating-point expression evaluation method. | |
| 262 -1 indeterminate | |
| 263 0 evaluate all operations and constants just to the range and | |
| 264 precision of the type | |
| 265 1 evaluate operations and constants of type _Decimal32 | |
| 266 and _Decimal64 to the range and precision of the _Decimal64 | |
| 267 type, evaluate _Decimal128 operations and constants to the | |
| 268 range and precision of the _Decimal128 type; | |
| 269 2 evaluate all operations and constants to the range and | |
| 270 precision of the _Decimal128 type. */ | |
| 271 | |
| 272 #undef DEC_EVAL_METHOD | |
| 273 #define DEC_EVAL_METHOD __DEC_EVAL_METHOD__ | |
| 274 | |
| 275 #endif /* __STDC_WANT_DEC_FP__ */ | |
| 276 | |
| 277 #endif /* _FLOAT_H___ */ |