1 /* Copyright (C) 2002-2022 Free Software Foundation, Inc. 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 || (defined (__cplusplus) && __cplusplus >= 201103L) 132 /* The floating-point expression evaluation method. The precise 133 definitions of these values are generalised to include support for 134 the interchange and extended types defined in ISO/IEC TS 18661-3. 135 Prior to this (for C99/C11) the definitions were: 136 137 -1 indeterminate 138 0 evaluate all operations and constants just to the range and 139 precision of the type 140 1 evaluate operations and constants of type float and double 141 to the range and precision of the double type, evaluate 142 long double operations and constants to the range and 143 precision of the long double type 144 2 evaluate all operations and constants to the range and 145 precision of the long double type 146 147 The TS 18661-3 definitions are: 148 149 -1 indeterminate 150 0 evaluate all operations and constants, whose semantic type has 151 at most the range and precision of float, to the range and 152 precision of float; evaluate all other operations and constants 153 to the range and precision of the semantic type. 154 1 evaluate all operations and constants, whose semantic type has 155 at most the range and precision of double, to the range and 156 precision of double; evaluate all other operations and constants 157 to the range and precision of the semantic type. 158 2 evaluate all operations and constants, whose semantic type has 159 at most the range and precision of long double, to the range and 160 precision of long double; evaluate all other operations and 161 constants to the range and precision of the semantic type. 162 N where _FloatN is a supported interchange floating type 163 evaluate all operations and constants, whose semantic type has 164 at most the range and precision of the _FloatN type, to the 165 range and precision of the _FloatN type; evaluate all other 166 operations and constants to the range and precision of the 167 semantic type. 168 N + 1, where _FloatNx is a supported extended floating type 169 evaluate operations and constants, whose semantic type has at 170 most the range and precision of the _FloatNx type, to the range 171 and precision of the _FloatNx type; evaluate all other 172 operations and constants to the range and precision of the 173 semantic type. 174 175 The compiler predefines two macros: 176 177 __FLT_EVAL_METHOD__ 178 Which, depending on the value given for 179 -fpermitted-flt-eval-methods, may be limited to only those values 180 for FLT_EVAL_METHOD defined in C99/C11. 181 182 __FLT_EVAL_METHOD_TS_18661_3__ 183 Which always permits the values for FLT_EVAL_METHOD defined in 184 ISO/IEC TS 18661-3. 185 186 Here we want to use __FLT_EVAL_METHOD__, unless 187 __STDC_WANT_IEC_60559_TYPES_EXT__ is defined, in which case the user 188 is specifically asking for the ISO/IEC TS 18661-3 types, so we use 189 __FLT_EVAL_METHOD_TS_18661_3__. 190 191 ??? This ought to change with the setting of the fp control word; 192 the value provided by the compiler assumes the widest setting. */ 193 #undef FLT_EVAL_METHOD 194 #ifdef __STDC_WANT_IEC_60559_TYPES_EXT__ 195 #define FLT_EVAL_METHOD __FLT_EVAL_METHOD_TS_18661_3__ 196 #else 197 #define FLT_EVAL_METHOD __FLT_EVAL_METHOD__ 198 #endif 199 200 /* Number of decimal digits, n, such that any floating-point number in the 201 widest supported floating type with pmax radix b digits can be rounded 202 to a floating-point number with n decimal digits and back again without 203 change to the value, 204 205 pmax * log10(b) if b is a power of 10 206 ceil(1 + pmax * log10(b)) otherwise 207 */ 208 #undef DECIMAL_DIG 209 #define DECIMAL_DIG __DECIMAL_DIG__ 210 211 #endif /* C99 */ 212 213 #if (defined (__STDC_VERSION__) && __STDC_VERSION__ >= 201112L) \ 214 || (defined (__cplusplus) && __cplusplus >= 201703L) 215 /* Versions of DECIMAL_DIG for each floating-point type. */ 216 #undef FLT_DECIMAL_DIG 217 #undef DBL_DECIMAL_DIG 218 #undef LDBL_DECIMAL_DIG 219 #define FLT_DECIMAL_DIG __FLT_DECIMAL_DIG__ 220 #define DBL_DECIMAL_DIG __DBL_DECIMAL_DIG__ 221 #define LDBL_DECIMAL_DIG __LDBL_DECIMAL_DIG__ 222 223 /* Whether types support subnormal numbers. */ 224 #undef FLT_HAS_SUBNORM 225 #undef DBL_HAS_SUBNORM 226 #undef LDBL_HAS_SUBNORM 227 #define FLT_HAS_SUBNORM __FLT_HAS_DENORM__ 228 #define DBL_HAS_SUBNORM __DBL_HAS_DENORM__ 229 #define LDBL_HAS_SUBNORM __LDBL_HAS_DENORM__ 230 231 /* Minimum positive values, including subnormals. */ 232 #undef FLT_TRUE_MIN 233 #undef DBL_TRUE_MIN 234 #undef LDBL_TRUE_MIN 235 #define FLT_TRUE_MIN __FLT_DENORM_MIN__ 236 #define DBL_TRUE_MIN __DBL_DENORM_MIN__ 237 #define LDBL_TRUE_MIN __LDBL_DENORM_MIN__ 238 239 #endif /* C11 */ 240 241 #if defined __STDC_VERSION__ && __STDC_VERSION__ > 201710L 242 /* Maximum finite positive value with MANT_DIG digits in the 243 significand taking their maximum value. */ 244 #undef FLT_NORM_MAX 245 #undef DBL_NORM_MAX 246 #undef LDBL_NORM_MAX 247 #define FLT_NORM_MAX __FLT_NORM_MAX__ 248 #define DBL_NORM_MAX __DBL_NORM_MAX__ 249 #define LDBL_NORM_MAX __LDBL_NORM_MAX__ 250 251 /* Whether each type matches an IEC 60559 format (1 for format, 2 for 252 format and operations). */ 253 #undef FLT_IS_IEC_60559 254 #undef DBL_IS_IEC_60559 255 #undef LDBL_IS_IEC_60559 256 #define FLT_IS_IEC_60559 __FLT_IS_IEC_60559__ 257 #define DBL_IS_IEC_60559 __DBL_IS_IEC_60559__ 258 #define LDBL_IS_IEC_60559 __LDBL_IS_IEC_60559__ 259 260 /* Infinity in type float, or overflow if infinity not supported. */ 261 #undef INFINITY 262 #define INFINITY (__builtin_inff ()) 263 264 /* Quiet NaN, if supported for float. */ 265 #if __FLT_HAS_QUIET_NAN__ 266 #undef NAN 267 #define NAN (__builtin_nanf ("")) 268 #endif 269 270 /* Signaling NaN, if supported for each type. All formats supported 271 by GCC support either both quiet and signaling NaNs, or neither 272 kind of NaN. */ 273 #if __FLT_HAS_QUIET_NAN__ 274 #undef FLT_SNAN 275 #define FLT_SNAN (__builtin_nansf ("")) 276 #endif 277 #if __DBL_HAS_QUIET_NAN__ 278 #undef DBL_SNAN 279 #define DBL_SNAN (__builtin_nans ("")) 280 #endif 281 #if __LDBL_HAS_QUIET_NAN__ 282 #undef LDBL_SNAN 283 #define LDBL_SNAN (__builtin_nansl ("")) 284 #endif 285 286 #endif /* C2X */ 287 288 #if (defined __STDC_WANT_IEC_60559_BFP_EXT__ \ 289 || defined __STDC_WANT_IEC_60559_EXT__) 290 /* Number of decimal digits for which conversions between decimal 291 character strings and binary formats, in both directions, are 292 correctly rounded. */ 293 #define CR_DECIMAL_DIG __UINTMAX_MAX__ 294 #endif 295 296 #ifdef __STDC_WANT_IEC_60559_TYPES_EXT__ 297 /* Constants for _FloatN and _FloatNx types from TS 18661-3. See 298 comments above for their semantics. */ 299 300 #ifdef __FLT16_MANT_DIG__ 301 #undef FLT16_MANT_DIG 302 #define FLT16_MANT_DIG __FLT16_MANT_DIG__ 303 #undef FLT16_DIG 304 #define FLT16_DIG __FLT16_DIG__ 305 #undef FLT16_MIN_EXP 306 #define FLT16_MIN_EXP __FLT16_MIN_EXP__ 307 #undef FLT16_MIN_10_EXP 308 #define FLT16_MIN_10_EXP __FLT16_MIN_10_EXP__ 309 #undef FLT16_MAX_EXP 310 #define FLT16_MAX_EXP __FLT16_MAX_EXP__ 311 #undef FLT16_MAX_10_EXP 312 #define FLT16_MAX_10_EXP __FLT16_MAX_10_EXP__ 313 #undef FLT16_MAX 314 #define FLT16_MAX __FLT16_MAX__ 315 #undef FLT16_EPSILON 316 #define FLT16_EPSILON __FLT16_EPSILON__ 317 #undef FLT16_MIN 318 #define FLT16_MIN __FLT16_MIN__ 319 #undef FLT16_DECIMAL_DIG 320 #define FLT16_DECIMAL_DIG __FLT16_DECIMAL_DIG__ 321 #undef FLT16_TRUE_MIN 322 #define FLT16_TRUE_MIN __FLT16_DENORM_MIN__ 323 #if defined __STDC_VERSION__ && __STDC_VERSION__ > 201710L 324 #undef FLT16_SNAN 325 #define FLT16_SNAN (__builtin_nansf16 ("")) 326 #endif /* C2X */ 327 #endif /* __FLT16_MANT_DIG__. */ 328 329 #ifdef __FLT32_MANT_DIG__ 330 #undef FLT32_MANT_DIG 331 #define FLT32_MANT_DIG __FLT32_MANT_DIG__ 332 #undef FLT32_DIG 333 #define FLT32_DIG __FLT32_DIG__ 334 #undef FLT32_MIN_EXP 335 #define FLT32_MIN_EXP __FLT32_MIN_EXP__ 336 #undef FLT32_MIN_10_EXP 337 #define FLT32_MIN_10_EXP __FLT32_MIN_10_EXP__ 338 #undef FLT32_MAX_EXP 339 #define FLT32_MAX_EXP __FLT32_MAX_EXP__ 340 #undef FLT32_MAX_10_EXP 341 #define FLT32_MAX_10_EXP __FLT32_MAX_10_EXP__ 342 #undef FLT32_MAX 343 #define FLT32_MAX __FLT32_MAX__ 344 #undef FLT32_EPSILON 345 #define FLT32_EPSILON __FLT32_EPSILON__ 346 #undef FLT32_MIN 347 #define FLT32_MIN __FLT32_MIN__ 348 #undef FLT32_DECIMAL_DIG 349 #define FLT32_DECIMAL_DIG __FLT32_DECIMAL_DIG__ 350 #undef FLT32_TRUE_MIN 351 #define FLT32_TRUE_MIN __FLT32_DENORM_MIN__ 352 #if defined __STDC_VERSION__ && __STDC_VERSION__ > 201710L 353 #undef FLT32_SNAN 354 #define FLT32_SNAN (__builtin_nansf32 ("")) 355 #endif /* C2X */ 356 #endif /* __FLT32_MANT_DIG__. */ 357 358 #ifdef __FLT64_MANT_DIG__ 359 #undef FLT64_MANT_DIG 360 #define FLT64_MANT_DIG __FLT64_MANT_DIG__ 361 #undef FLT64_DIG 362 #define FLT64_DIG __FLT64_DIG__ 363 #undef FLT64_MIN_EXP 364 #define FLT64_MIN_EXP __FLT64_MIN_EXP__ 365 #undef FLT64_MIN_10_EXP 366 #define FLT64_MIN_10_EXP __FLT64_MIN_10_EXP__ 367 #undef FLT64_MAX_EXP 368 #define FLT64_MAX_EXP __FLT64_MAX_EXP__ 369 #undef FLT64_MAX_10_EXP 370 #define FLT64_MAX_10_EXP __FLT64_MAX_10_EXP__ 371 #undef FLT64_MAX 372 #define FLT64_MAX __FLT64_MAX__ 373 #undef FLT64_EPSILON 374 #define FLT64_EPSILON __FLT64_EPSILON__ 375 #undef FLT64_MIN 376 #define FLT64_MIN __FLT64_MIN__ 377 #undef FLT64_DECIMAL_DIG 378 #define FLT64_DECIMAL_DIG __FLT64_DECIMAL_DIG__ 379 #undef FLT64_TRUE_MIN 380 #define FLT64_TRUE_MIN __FLT64_DENORM_MIN__ 381 #if defined __STDC_VERSION__ && __STDC_VERSION__ > 201710L 382 #undef FLT64_SNAN 383 #define FLT64_SNAN (__builtin_nansf64 ("")) 384 #endif /* C2X */ 385 #endif /* __FLT64_MANT_DIG__. */ 386 387 #ifdef __FLT128_MANT_DIG__ 388 #undef FLT128_MANT_DIG 389 #define FLT128_MANT_DIG __FLT128_MANT_DIG__ 390 #undef FLT128_DIG 391 #define FLT128_DIG __FLT128_DIG__ 392 #undef FLT128_MIN_EXP 393 #define FLT128_MIN_EXP __FLT128_MIN_EXP__ 394 #undef FLT128_MIN_10_EXP 395 #define FLT128_MIN_10_EXP __FLT128_MIN_10_EXP__ 396 #undef FLT128_MAX_EXP 397 #define FLT128_MAX_EXP __FLT128_MAX_EXP__ 398 #undef FLT128_MAX_10_EXP 399 #define FLT128_MAX_10_EXP __FLT128_MAX_10_EXP__ 400 #undef FLT128_MAX 401 #define FLT128_MAX __FLT128_MAX__ 402 #undef FLT128_EPSILON 403 #define FLT128_EPSILON __FLT128_EPSILON__ 404 #undef FLT128_MIN 405 #define FLT128_MIN __FLT128_MIN__ 406 #undef FLT128_DECIMAL_DIG 407 #define FLT128_DECIMAL_DIG __FLT128_DECIMAL_DIG__ 408 #undef FLT128_TRUE_MIN 409 #define FLT128_TRUE_MIN __FLT128_DENORM_MIN__ 410 #if defined __STDC_VERSION__ && __STDC_VERSION__ > 201710L 411 #undef FLT128_SNAN 412 #define FLT128_SNAN (__builtin_nansf128 ("")) 413 #endif /* C2X */ 414 #endif /* __FLT128_MANT_DIG__. */ 415 416 #ifdef __FLT32X_MANT_DIG__ 417 #undef FLT32X_MANT_DIG 418 #define FLT32X_MANT_DIG __FLT32X_MANT_DIG__ 419 #undef FLT32X_DIG 420 #define FLT32X_DIG __FLT32X_DIG__ 421 #undef FLT32X_MIN_EXP 422 #define FLT32X_MIN_EXP __FLT32X_MIN_EXP__ 423 #undef FLT32X_MIN_10_EXP 424 #define FLT32X_MIN_10_EXP __FLT32X_MIN_10_EXP__ 425 #undef FLT32X_MAX_EXP 426 #define FLT32X_MAX_EXP __FLT32X_MAX_EXP__ 427 #undef FLT32X_MAX_10_EXP 428 #define FLT32X_MAX_10_EXP __FLT32X_MAX_10_EXP__ 429 #undef FLT32X_MAX 430 #define FLT32X_MAX __FLT32X_MAX__ 431 #undef FLT32X_EPSILON 432 #define FLT32X_EPSILON __FLT32X_EPSILON__ 433 #undef FLT32X_MIN 434 #define FLT32X_MIN __FLT32X_MIN__ 435 #undef FLT32X_DECIMAL_DIG 436 #define FLT32X_DECIMAL_DIG __FLT32X_DECIMAL_DIG__ 437 #undef FLT32X_TRUE_MIN 438 #define FLT32X_TRUE_MIN __FLT32X_DENORM_MIN__ 439 #if defined __STDC_VERSION__ && __STDC_VERSION__ > 201710L 440 #undef FLT32X_SNAN 441 #define FLT32X_SNAN (__builtin_nansf32x ("")) 442 #endif /* C2X */ 443 #endif /* __FLT32X_MANT_DIG__. */ 444 445 #ifdef __FLT64X_MANT_DIG__ 446 #undef FLT64X_MANT_DIG 447 #define FLT64X_MANT_DIG __FLT64X_MANT_DIG__ 448 #undef FLT64X_DIG 449 #define FLT64X_DIG __FLT64X_DIG__ 450 #undef FLT64X_MIN_EXP 451 #define FLT64X_MIN_EXP __FLT64X_MIN_EXP__ 452 #undef FLT64X_MIN_10_EXP 453 #define FLT64X_MIN_10_EXP __FLT64X_MIN_10_EXP__ 454 #undef FLT64X_MAX_EXP 455 #define FLT64X_MAX_EXP __FLT64X_MAX_EXP__ 456 #undef FLT64X_MAX_10_EXP 457 #define FLT64X_MAX_10_EXP __FLT64X_MAX_10_EXP__ 458 #undef FLT64X_MAX 459 #define FLT64X_MAX __FLT64X_MAX__ 460 #undef FLT64X_EPSILON 461 #define FLT64X_EPSILON __FLT64X_EPSILON__ 462 #undef FLT64X_MIN 463 #define FLT64X_MIN __FLT64X_MIN__ 464 #undef FLT64X_DECIMAL_DIG 465 #define FLT64X_DECIMAL_DIG __FLT64X_DECIMAL_DIG__ 466 #undef FLT64X_TRUE_MIN 467 #define FLT64X_TRUE_MIN __FLT64X_DENORM_MIN__ 468 #if defined __STDC_VERSION__ && __STDC_VERSION__ > 201710L 469 #undef FLT64X_SNAN 470 #define FLT64X_SNAN (__builtin_nansf64x ("")) 471 #endif /* C2X */ 472 #endif /* __FLT64X_MANT_DIG__. */ 473 474 #ifdef __FLT128X_MANT_DIG__ 475 #undef FLT128X_MANT_DIG 476 #define FLT128X_MANT_DIG __FLT128X_MANT_DIG__ 477 #undef FLT128X_DIG 478 #define FLT128X_DIG __FLT128X_DIG__ 479 #undef FLT128X_MIN_EXP 480 #define FLT128X_MIN_EXP __FLT128X_MIN_EXP__ 481 #undef FLT128X_MIN_10_EXP 482 #define FLT128X_MIN_10_EXP __FLT128X_MIN_10_EXP__ 483 #undef FLT128X_MAX_EXP 484 #define FLT128X_MAX_EXP __FLT128X_MAX_EXP__ 485 #undef FLT128X_MAX_10_EXP 486 #define FLT128X_MAX_10_EXP __FLT128X_MAX_10_EXP__ 487 #undef FLT128X_MAX 488 #define FLT128X_MAX __FLT128X_MAX__ 489 #undef FLT128X_EPSILON 490 #define FLT128X_EPSILON __FLT128X_EPSILON__ 491 #undef FLT128X_MIN 492 #define FLT128X_MIN __FLT128X_MIN__ 493 #undef FLT128X_DECIMAL_DIG 494 #define FLT128X_DECIMAL_DIG __FLT128X_DECIMAL_DIG__ 495 #undef FLT128X_TRUE_MIN 496 #define FLT128X_TRUE_MIN __FLT128X_DENORM_MIN__ 497 #if defined __STDC_VERSION__ && __STDC_VERSION__ > 201710L 498 #undef FLT128X_SNAN 499 #define FLT128X_SNAN (__builtin_nansf128x ("")) 500 #endif /* C2X */ 501 #endif /* __FLT128X_MANT_DIG__. */ 502 503 #endif /* __STDC_WANT_IEC_60559_TYPES_EXT__. */ 504 505 #ifdef __DEC32_MANT_DIG__ 506 #if (defined __STDC_WANT_DEC_FP__ \ 507 || defined __STDC_WANT_IEC_60559_DFP_EXT__ \ 508 || (defined __STDC_VERSION__ && __STDC_VERSION__ > 201710L)) 509 /* C2X; formerly Technical Report 24732, extension for decimal 510 floating-point arithmetic: Characteristic of decimal floating types 511 <float.h>, and TS 18661-2. */ 512 513 /* Number of base-FLT_RADIX digits in the significand, p. */ 514 #undef DEC32_MANT_DIG 515 #undef DEC64_MANT_DIG 516 #undef DEC128_MANT_DIG 517 #define DEC32_MANT_DIG __DEC32_MANT_DIG__ 518 #define DEC64_MANT_DIG __DEC64_MANT_DIG__ 519 #define DEC128_MANT_DIG __DEC128_MANT_DIG__ 520 521 /* Minimum exponent. */ 522 #undef DEC32_MIN_EXP 523 #undef DEC64_MIN_EXP 524 #undef DEC128_MIN_EXP 525 #define DEC32_MIN_EXP __DEC32_MIN_EXP__ 526 #define DEC64_MIN_EXP __DEC64_MIN_EXP__ 527 #define DEC128_MIN_EXP __DEC128_MIN_EXP__ 528 529 /* Maximum exponent. */ 530 #undef DEC32_MAX_EXP 531 #undef DEC64_MAX_EXP 532 #undef DEC128_MAX_EXP 533 #define DEC32_MAX_EXP __DEC32_MAX_EXP__ 534 #define DEC64_MAX_EXP __DEC64_MAX_EXP__ 535 #define DEC128_MAX_EXP __DEC128_MAX_EXP__ 536 537 /* Maximum representable finite decimal floating-point number 538 (there are 6, 15, and 33 9s after the decimal points respectively). */ 539 #undef DEC32_MAX 540 #undef DEC64_MAX 541 #undef DEC128_MAX 542 #define DEC32_MAX __DEC32_MAX__ 543 #define DEC64_MAX __DEC64_MAX__ 544 #define DEC128_MAX __DEC128_MAX__ 545 546 /* The difference between 1 and the least value greater than 1 that is 547 representable in the given floating point type. */ 548 #undef DEC32_EPSILON 549 #undef DEC64_EPSILON 550 #undef DEC128_EPSILON 551 #define DEC32_EPSILON __DEC32_EPSILON__ 552 #define DEC64_EPSILON __DEC64_EPSILON__ 553 #define DEC128_EPSILON __DEC128_EPSILON__ 554 555 /* Minimum normalized positive floating-point number. */ 556 #undef DEC32_MIN 557 #undef DEC64_MIN 558 #undef DEC128_MIN 559 #define DEC32_MIN __DEC32_MIN__ 560 #define DEC64_MIN __DEC64_MIN__ 561 #define DEC128_MIN __DEC128_MIN__ 562 563 /* The floating-point expression evaluation method. 564 -1 indeterminate 565 0 evaluate all operations and constants just to the range and 566 precision of the type 567 1 evaluate operations and constants of type _Decimal32 568 and _Decimal64 to the range and precision of the _Decimal64 569 type, evaluate _Decimal128 operations and constants to the 570 range and precision of the _Decimal128 type; 571 2 evaluate all operations and constants to the range and 572 precision of the _Decimal128 type. */ 573 574 #undef DEC_EVAL_METHOD 575 #define DEC_EVAL_METHOD __DEC_EVAL_METHOD__ 576 577 #endif /* __STDC_WANT_DEC_FP__ || __STDC_WANT_IEC_60559_DFP_EXT__ || C2X. */ 578 579 #ifdef __STDC_WANT_DEC_FP__ 580 581 /* Minimum subnormal positive floating-point number. */ 582 #undef DEC32_SUBNORMAL_MIN 583 #undef DEC64_SUBNORMAL_MIN 584 #undef DEC128_SUBNORMAL_MIN 585 #define DEC32_SUBNORMAL_MIN __DEC32_SUBNORMAL_MIN__ 586 #define DEC64_SUBNORMAL_MIN __DEC64_SUBNORMAL_MIN__ 587 #define DEC128_SUBNORMAL_MIN __DEC128_SUBNORMAL_MIN__ 588 589 #endif /* __STDC_WANT_DEC_FP__. */ 590 591 #if (defined __STDC_WANT_IEC_60559_DFP_EXT__ \ 592 || (defined __STDC_VERSION__ && __STDC_VERSION__ > 201710L)) 593 594 /* Minimum subnormal positive floating-point number. */ 595 #undef DEC32_TRUE_MIN 596 #undef DEC64_TRUE_MIN 597 #undef DEC128_TRUE_MIN 598 #define DEC32_TRUE_MIN __DEC32_SUBNORMAL_MIN__ 599 #define DEC64_TRUE_MIN __DEC64_SUBNORMAL_MIN__ 600 #define DEC128_TRUE_MIN __DEC128_SUBNORMAL_MIN__ 601 602 #endif /* __STDC_WANT_IEC_60559_DFP_EXT__ || C2X. */ 603 604 #if defined __STDC_VERSION__ && __STDC_VERSION__ > 201710L 605 606 /* Infinity in type _Decimal32. */ 607 #undef DEC_INFINITY 608 #define DEC_INFINITY (__builtin_infd32 ()) 609 610 /* Quiet NaN in type _Decimal32. */ 611 #undef DEC_NAN 612 #define DEC_NAN (__builtin_nand32 ("")) 613 614 /* Signaling NaN in each decimal floating-point type. */ 615 #undef DEC32_SNAN 616 #define DEC32_SNAN (__builtin_nansd32 ("")) 617 #undef DEC64_SNAN 618 #define DEC64_SNAN (__builtin_nansd64 ("")) 619 #undef DEC128_SNAN 620 #define DEC128_SNAN (__builtin_nansd128 ("")) 621 622 #endif /* C2X */ 623 624 #endif /* __DEC32_MANT_DIG__ */ 625 626 #endif /* _FLOAT_H___ */ 627
Indexes created Wed Mar 04 05:31:52 UTC 2026