Mercurial > hg > CbC > CbC_gcc
annotate gcc/real.h @ 131:84e7813d76e9
gcc-8.2
| author | mir3636 |
|---|---|
| date | Thu, 25 Oct 2018 07:37:49 +0900 |
| parents | 04ced10e8804 |
| children | 1830386684a0 |
| rev | line source |
|---|---|
| 0 | 1 /* Definitions of floating-point access for GNU compiler. |
| 131 | 2 Copyright (C) 1989-2018 Free Software Foundation, Inc. |
| 0 | 3 |
| 4 This file is part of GCC. | |
| 5 | |
| 6 GCC is free software; you can redistribute it and/or modify it under | |
| 7 the terms of the GNU General Public License as published by the Free | |
| 8 Software Foundation; either version 3, or (at your option) any later | |
| 9 version. | |
| 10 | |
| 11 GCC is distributed in the hope that it will be useful, but WITHOUT ANY | |
| 12 WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 13 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 14 for more details. | |
| 15 | |
| 16 You should have received a copy of the GNU General Public License | |
| 17 along with GCC; see the file COPYING3. If not see | |
| 18 <http://www.gnu.org/licenses/>. */ | |
| 19 | |
| 20 #ifndef GCC_REAL_H | |
| 21 #define GCC_REAL_H | |
| 22 | |
| 23 /* An expanded form of the represented number. */ | |
| 24 | |
| 25 /* Enumerate the special cases of numbers that we encounter. */ | |
| 26 enum real_value_class { | |
| 27 rvc_zero, | |
| 28 rvc_normal, | |
| 29 rvc_inf, | |
| 30 rvc_nan | |
| 31 }; | |
| 32 | |
| 33 #define SIGNIFICAND_BITS (128 + HOST_BITS_PER_LONG) | |
| 34 #define EXP_BITS (32 - 6) | |
| 35 #define MAX_EXP ((1 << (EXP_BITS - 1)) - 1) | |
| 36 #define SIGSZ (SIGNIFICAND_BITS / HOST_BITS_PER_LONG) | |
| 37 #define SIG_MSB ((unsigned long)1 << (HOST_BITS_PER_LONG - 1)) | |
| 38 | |
|
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39 struct GTY(()) real_value { |
| 0 | 40 /* Use the same underlying type for all bit-fields, so as to make |
| 41 sure they're packed together, otherwise REAL_VALUE_TYPE_SIZE will | |
| 42 be miscomputed. */ | |
| 43 unsigned int /* ENUM_BITFIELD (real_value_class) */ cl : 2; | |
| 44 unsigned int decimal : 1; | |
| 45 unsigned int sign : 1; | |
| 46 unsigned int signalling : 1; | |
| 47 unsigned int canonical : 1; | |
| 48 unsigned int uexp : EXP_BITS; | |
| 49 unsigned long sig[SIGSZ]; | |
| 50 }; | |
| 51 | |
| 52 #define REAL_EXP(REAL) \ | |
| 53 ((int)((REAL)->uexp ^ (unsigned int)(1 << (EXP_BITS - 1))) \ | |
| 54 - (1 << (EXP_BITS - 1))) | |
| 55 #define SET_REAL_EXP(REAL, EXP) \ | |
| 56 ((REAL)->uexp = ((unsigned int)(EXP) & (unsigned int)((1 << EXP_BITS) - 1))) | |
| 57 | |
| 58 /* Various headers condition prototypes on #ifdef REAL_VALUE_TYPE, so it | |
| 59 needs to be a macro. We do need to continue to have a structure tag | |
| 60 so that other headers can forward declare it. */ | |
| 61 #define REAL_VALUE_TYPE struct real_value | |
| 62 | |
| 63 /* We store a REAL_VALUE_TYPE into an rtx, and we do this by putting it in | |
| 64 consecutive "w" slots. Moreover, we've got to compute the number of "w" | |
| 65 slots at preprocessor time, which means we can't use sizeof. Guess. */ | |
| 66 | |
| 67 #define REAL_VALUE_TYPE_SIZE (SIGNIFICAND_BITS + 32) | |
| 68 #define REAL_WIDTH \ | |
| 69 (REAL_VALUE_TYPE_SIZE/HOST_BITS_PER_WIDE_INT \ | |
| 70 + (REAL_VALUE_TYPE_SIZE%HOST_BITS_PER_WIDE_INT ? 1 : 0)) /* round up */ | |
| 71 | |
| 72 /* Verify the guess. */ | |
| 73 extern char test_real_width | |
| 111 | 74 [sizeof (REAL_VALUE_TYPE) <= REAL_WIDTH * sizeof (HOST_WIDE_INT) ? 1 : -1]; |
| 0 | 75 |
| 76 /* Calculate the format for CONST_DOUBLE. We need as many slots as | |
| 77 are necessary to overlay a REAL_VALUE_TYPE on them. This could be | |
| 78 as many as four (32-bit HOST_WIDE_INT, 128-bit REAL_VALUE_TYPE). | |
| 79 | |
| 80 A number of places assume that there are always at least two 'w' | |
| 81 slots in a CONST_DOUBLE, so we provide them even if one would suffice. */ | |
| 82 | |
| 83 #if REAL_WIDTH == 1 | |
| 84 # define CONST_DOUBLE_FORMAT "ww" | |
| 85 #else | |
| 86 # if REAL_WIDTH == 2 | |
| 87 # define CONST_DOUBLE_FORMAT "ww" | |
| 88 # else | |
| 89 # if REAL_WIDTH == 3 | |
| 90 # define CONST_DOUBLE_FORMAT "www" | |
| 91 # else | |
| 92 # if REAL_WIDTH == 4 | |
| 93 # define CONST_DOUBLE_FORMAT "wwww" | |
| 94 # else | |
| 95 # if REAL_WIDTH == 5 | |
| 96 # define CONST_DOUBLE_FORMAT "wwwww" | |
| 97 # else | |
| 98 # if REAL_WIDTH == 6 | |
| 99 # define CONST_DOUBLE_FORMAT "wwwwww" | |
| 100 # else | |
| 101 #error "REAL_WIDTH > 6 not supported" | |
| 102 # endif | |
| 103 # endif | |
| 104 # endif | |
| 105 # endif | |
| 106 # endif | |
| 107 #endif | |
| 108 | |
| 109 | |
| 110 /* Describes the properties of the specific target format in use. */ | |
| 111 struct real_format | |
| 112 { | |
| 113 /* Move to and from the target bytes. */ | |
| 114 void (*encode) (const struct real_format *, long *, | |
| 115 const REAL_VALUE_TYPE *); | |
| 116 void (*decode) (const struct real_format *, REAL_VALUE_TYPE *, | |
| 117 const long *); | |
| 118 | |
| 119 /* The radix of the exponent and digits of the significand. */ | |
| 120 int b; | |
| 121 | |
| 122 /* Size of the significand in digits of radix B. */ | |
| 123 int p; | |
| 124 | |
| 125 /* Size of the significant of a NaN, in digits of radix B. */ | |
| 126 int pnan; | |
| 127 | |
| 128 /* The minimum negative integer, x, such that b**(x-1) is normalized. */ | |
| 129 int emin; | |
| 130 | |
| 131 /* The maximum integer, x, such that b**(x-1) is representable. */ | |
| 132 int emax; | |
| 133 | |
| 134 /* The bit position of the sign bit, for determining whether a value | |
| 135 is positive/negative, or -1 for a complex encoding. */ | |
| 136 int signbit_ro; | |
| 137 | |
| 138 /* The bit position of the sign bit, for changing the sign of a number, | |
| 139 or -1 for a complex encoding. */ | |
| 140 int signbit_rw; | |
| 141 | |
| 111 | 142 /* If this is an IEEE interchange format, the number of bits in the |
| 143 format; otherwise, if it is an IEEE extended format, one more | |
| 144 than the greatest number of bits in an interchange format it | |
| 145 extends; otherwise 0. Formats need not follow the IEEE 754-2008 | |
| 146 recommended practice regarding how signaling NaNs are identified, | |
| 147 and may vary in the choice of default NaN, but must follow other | |
| 148 IEEE practice regarding having NaNs, infinities and subnormal | |
| 149 values, and the relation of minimum and maximum exponents, and, | |
| 150 for interchange formats, the details of the encoding. */ | |
| 151 int ieee_bits; | |
| 152 | |
| 0 | 153 /* Default rounding mode for operations on this format. */ |
| 154 bool round_towards_zero; | |
| 155 bool has_sign_dependent_rounding; | |
| 156 | |
| 157 /* Properties of the format. */ | |
| 158 bool has_nans; | |
| 159 bool has_inf; | |
| 160 bool has_denorm; | |
| 161 bool has_signed_zero; | |
| 162 bool qnan_msb_set; | |
| 163 bool canonical_nan_lsbs_set; | |
| 111 | 164 const char *name; |
| 0 | 165 }; |
| 166 | |
| 167 | |
| 168 /* The target format used for each floating point mode. | |
| 169 Float modes are followed by decimal float modes, with entries for | |
| 170 float modes indexed by (MODE - first float mode), and entries for | |
| 171 decimal float modes indexed by (MODE - first decimal float mode) + | |
| 172 the number of float modes. */ | |
| 173 extern const struct real_format * | |
| 174 real_format_for_mode[MAX_MODE_FLOAT - MIN_MODE_FLOAT + 1 | |
| 175 + MAX_MODE_DECIMAL_FLOAT - MIN_MODE_DECIMAL_FLOAT + 1]; | |
| 176 | |
| 177 #define REAL_MODE_FORMAT(MODE) \ | |
| 178 (real_format_for_mode[DECIMAL_FLOAT_MODE_P (MODE) \ | |
| 179 ? (((MODE) - MIN_MODE_DECIMAL_FLOAT) \ | |
| 180 + (MAX_MODE_FLOAT - MIN_MODE_FLOAT + 1)) \ | |
| 111 | 181 : GET_MODE_CLASS (MODE) == MODE_FLOAT \ |
| 182 ? ((MODE) - MIN_MODE_FLOAT) \ | |
| 183 : (gcc_unreachable (), 0)]) | |
| 0 | 184 |
| 185 #define FLOAT_MODE_FORMAT(MODE) \ | |
| 111 | 186 (REAL_MODE_FORMAT (as_a <scalar_float_mode> (GET_MODE_INNER (MODE)))) |
| 0 | 187 |
| 188 /* The following macro determines whether the floating point format is | |
| 189 composite, i.e. may contain non-consecutive mantissa bits, in which | |
| 190 case compile-time FP overflow may not model run-time overflow. */ | |
| 191 #define MODE_COMPOSITE_P(MODE) \ | |
| 192 (FLOAT_MODE_P (MODE) \ | |
| 193 && FLOAT_MODE_FORMAT (MODE)->pnan < FLOAT_MODE_FORMAT (MODE)->p) | |
| 194 | |
| 195 /* Accessor macros for format properties. */ | |
| 196 #define MODE_HAS_NANS(MODE) \ | |
| 197 (FLOAT_MODE_P (MODE) && FLOAT_MODE_FORMAT (MODE)->has_nans) | |
| 198 #define MODE_HAS_INFINITIES(MODE) \ | |
| 199 (FLOAT_MODE_P (MODE) && FLOAT_MODE_FORMAT (MODE)->has_inf) | |
| 200 #define MODE_HAS_SIGNED_ZEROS(MODE) \ | |
| 201 (FLOAT_MODE_P (MODE) && FLOAT_MODE_FORMAT (MODE)->has_signed_zero) | |
| 202 #define MODE_HAS_SIGN_DEPENDENT_ROUNDING(MODE) \ | |
| 203 (FLOAT_MODE_P (MODE) \ | |
| 204 && FLOAT_MODE_FORMAT (MODE)->has_sign_dependent_rounding) | |
| 205 | |
| 111 | 206 /* This class allows functions in this file to accept a floating-point |
| 207 format as either a mode or an explicit real_format pointer. In the | |
| 208 former case the mode must be VOIDmode (which means "no particular | |
| 209 format") or must satisfy SCALAR_FLOAT_MODE_P. */ | |
| 210 class format_helper | |
| 211 { | |
| 212 public: | |
| 213 format_helper (const real_format *format) : m_format (format) {} | |
| 214 template<typename T> format_helper (const T &); | |
| 215 const real_format *operator-> () const { return m_format; } | |
| 216 operator const real_format *() const { return m_format; } | |
| 217 | |
| 218 bool decimal_p () const { return m_format && m_format->b == 10; } | |
| 131 | 219 bool can_represent_integral_type_p (tree type) const; |
| 111 | 220 |
| 221 private: | |
| 222 const real_format *m_format; | |
| 223 }; | |
| 224 | |
| 225 template<typename T> | |
| 226 inline format_helper::format_helper (const T &m) | |
| 227 : m_format (m == VOIDmode ? 0 : REAL_MODE_FORMAT (m)) | |
| 228 {} | |
| 229 | |
| 230 /* Declare functions in real.c. */ | |
| 231 | |
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232 /* True if the given mode has a NaN representation and the treatment of |
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233 NaN operands is important. Certain optimizations, such as folding |
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234 x * 0 into 0, are not correct for NaN operands, and are normally |
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235 disabled for modes with NaNs. The user can ask for them to be |
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236 done anyway using the -funsafe-math-optimizations switch. */ |
| 111 | 237 extern bool HONOR_NANS (machine_mode); |
| 238 extern bool HONOR_NANS (const_tree); | |
| 239 extern bool HONOR_NANS (const_rtx); | |
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240 |
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241 /* Like HONOR_NANs, but true if we honor signaling NaNs (or sNaNs). */ |
| 111 | 242 extern bool HONOR_SNANS (machine_mode); |
| 243 extern bool HONOR_SNANS (const_tree); | |
| 244 extern bool HONOR_SNANS (const_rtx); | |
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245 |
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246 /* As for HONOR_NANS, but true if the mode can represent infinity and |
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247 the treatment of infinite values is important. */ |
| 111 | 248 extern bool HONOR_INFINITIES (machine_mode); |
| 249 extern bool HONOR_INFINITIES (const_tree); | |
| 250 extern bool HONOR_INFINITIES (const_rtx); | |
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251 |
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252 /* Like HONOR_NANS, but true if the given mode distinguishes between |
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253 positive and negative zero, and the sign of zero is important. */ |
| 111 | 254 extern bool HONOR_SIGNED_ZEROS (machine_mode); |
| 255 extern bool HONOR_SIGNED_ZEROS (const_tree); | |
| 256 extern bool HONOR_SIGNED_ZEROS (const_rtx); | |
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257 |
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258 /* Like HONOR_NANS, but true if given mode supports sign-dependent rounding, |
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259 and the rounding mode is important. */ |
| 111 | 260 extern bool HONOR_SIGN_DEPENDENT_ROUNDING (machine_mode); |
| 261 extern bool HONOR_SIGN_DEPENDENT_ROUNDING (const_tree); | |
| 262 extern bool HONOR_SIGN_DEPENDENT_ROUNDING (const_rtx); | |
| 0 | 263 |
| 264 /* Binary or unary arithmetic on tree_code. */ | |
| 265 extern bool real_arithmetic (REAL_VALUE_TYPE *, int, const REAL_VALUE_TYPE *, | |
| 266 const REAL_VALUE_TYPE *); | |
| 267 | |
| 268 /* Compare reals by tree_code. */ | |
| 269 extern bool real_compare (int, const REAL_VALUE_TYPE *, const REAL_VALUE_TYPE *); | |
| 270 | |
| 271 /* Determine whether a floating-point value X is infinite. */ | |
| 272 extern bool real_isinf (const REAL_VALUE_TYPE *); | |
| 273 | |
| 274 /* Determine whether a floating-point value X is a NaN. */ | |
| 275 extern bool real_isnan (const REAL_VALUE_TYPE *); | |
| 276 | |
| 111 | 277 /* Determine whether a floating-point value X is a signaling NaN. */ |
| 278 extern bool real_issignaling_nan (const REAL_VALUE_TYPE *); | |
| 279 | |
| 0 | 280 /* Determine whether a floating-point value X is finite. */ |
| 281 extern bool real_isfinite (const REAL_VALUE_TYPE *); | |
| 282 | |
| 283 /* Determine whether a floating-point value X is negative. */ | |
| 284 extern bool real_isneg (const REAL_VALUE_TYPE *); | |
| 285 | |
| 286 /* Determine whether a floating-point value X is minus zero. */ | |
| 287 extern bool real_isnegzero (const REAL_VALUE_TYPE *); | |
| 288 | |
| 111 | 289 /* Test relationships between reals. */ |
| 0 | 290 extern bool real_identical (const REAL_VALUE_TYPE *, const REAL_VALUE_TYPE *); |
| 111 | 291 extern bool real_equal (const REAL_VALUE_TYPE *, const REAL_VALUE_TYPE *); |
| 292 extern bool real_less (const REAL_VALUE_TYPE *, const REAL_VALUE_TYPE *); | |
| 0 | 293 |
| 111 | 294 /* Extend or truncate to a new format. */ |
| 295 extern void real_convert (REAL_VALUE_TYPE *, format_helper, | |
| 0 | 296 const REAL_VALUE_TYPE *); |
| 297 | |
| 298 /* Return true if truncating to NEW is exact. */ | |
| 111 | 299 extern bool exact_real_truncate (format_helper, const REAL_VALUE_TYPE *); |
| 0 | 300 |
| 301 /* Render R as a decimal floating point constant. */ | |
| 302 extern void real_to_decimal (char *, const REAL_VALUE_TYPE *, size_t, | |
| 303 size_t, int); | |
| 304 | |
| 305 /* Render R as a decimal floating point constant, rounded so as to be | |
| 306 parsed back to the same value when interpreted in mode MODE. */ | |
| 307 extern void real_to_decimal_for_mode (char *, const REAL_VALUE_TYPE *, size_t, | |
| 111 | 308 size_t, int, machine_mode); |
| 0 | 309 |
| 310 /* Render R as a hexadecimal floating point constant. */ | |
| 311 extern void real_to_hexadecimal (char *, const REAL_VALUE_TYPE *, | |
| 312 size_t, size_t, int); | |
| 313 | |
| 314 /* Render R as an integer. */ | |
| 315 extern HOST_WIDE_INT real_to_integer (const REAL_VALUE_TYPE *); | |
| 316 | |
| 317 /* Initialize R from a decimal or hexadecimal string. Return -1 if | |
| 318 the value underflows, +1 if overflows, and 0 otherwise. */ | |
| 319 extern int real_from_string (REAL_VALUE_TYPE *, const char *); | |
| 320 /* Wrapper to allow different internal representation for decimal floats. */ | |
| 111 | 321 extern void real_from_string3 (REAL_VALUE_TYPE *, const char *, format_helper); |
| 0 | 322 |
| 111 | 323 extern long real_to_target (long *, const REAL_VALUE_TYPE *, format_helper); |
| 0 | 324 |
| 325 extern void real_from_target (REAL_VALUE_TYPE *, const long *, | |
| 111 | 326 format_helper); |
| 0 | 327 |
| 328 extern void real_inf (REAL_VALUE_TYPE *); | |
| 329 | |
| 111 | 330 extern bool real_nan (REAL_VALUE_TYPE *, const char *, int, format_helper); |
| 0 | 331 |
| 111 | 332 extern void real_maxval (REAL_VALUE_TYPE *, int, machine_mode); |
| 0 | 333 |
| 111 | 334 extern void real_2expN (REAL_VALUE_TYPE *, int, format_helper); |
| 0 | 335 |
| 336 extern unsigned int real_hash (const REAL_VALUE_TYPE *); | |
| 337 | |
| 338 | |
| 339 /* Target formats defined in real.c. */ | |
| 340 extern const struct real_format ieee_single_format; | |
| 341 extern const struct real_format mips_single_format; | |
| 342 extern const struct real_format motorola_single_format; | |
| 343 extern const struct real_format spu_single_format; | |
| 344 extern const struct real_format ieee_double_format; | |
| 345 extern const struct real_format mips_double_format; | |
| 346 extern const struct real_format motorola_double_format; | |
| 347 extern const struct real_format ieee_extended_motorola_format; | |
| 348 extern const struct real_format ieee_extended_intel_96_format; | |
| 349 extern const struct real_format ieee_extended_intel_96_round_53_format; | |
| 350 extern const struct real_format ieee_extended_intel_128_format; | |
| 351 extern const struct real_format ibm_extended_format; | |
| 352 extern const struct real_format mips_extended_format; | |
| 353 extern const struct real_format ieee_quad_format; | |
| 354 extern const struct real_format mips_quad_format; | |
| 355 extern const struct real_format vax_f_format; | |
| 356 extern const struct real_format vax_d_format; | |
| 357 extern const struct real_format vax_g_format; | |
| 358 extern const struct real_format real_internal_format; | |
| 359 extern const struct real_format decimal_single_format; | |
| 360 extern const struct real_format decimal_double_format; | |
| 361 extern const struct real_format decimal_quad_format; | |
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362 extern const struct real_format ieee_half_format; |
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363 extern const struct real_format arm_half_format; |
| 0 | 364 |
| 365 | |
| 366 /* ====================================================================== */ | |
| 367 /* Crap. */ | |
| 368 | |
| 369 /* Determine whether a floating-point value X is infinite. */ | |
| 370 #define REAL_VALUE_ISINF(x) real_isinf (&(x)) | |
| 371 | |
| 372 /* Determine whether a floating-point value X is a NaN. */ | |
| 373 #define REAL_VALUE_ISNAN(x) real_isnan (&(x)) | |
| 374 | |
| 111 | 375 /* Determine whether a floating-point value X is a signaling NaN. */ |
| 376 #define REAL_VALUE_ISSIGNALING_NAN(x) real_issignaling_nan (&(x)) | |
| 377 | |
| 0 | 378 /* Determine whether a floating-point value X is negative. */ |
| 379 #define REAL_VALUE_NEGATIVE(x) real_isneg (&(x)) | |
| 380 | |
| 381 /* Determine whether a floating-point value X is minus zero. */ | |
| 382 #define REAL_VALUE_MINUS_ZERO(x) real_isnegzero (&(x)) | |
| 383 | |
| 384 /* IN is a REAL_VALUE_TYPE. OUT is an array of longs. */ | |
| 385 #define REAL_VALUE_TO_TARGET_LONG_DOUBLE(IN, OUT) \ | |
| 386 real_to_target (OUT, &(IN), \ | |
| 111 | 387 float_mode_for_size (LONG_DOUBLE_TYPE_SIZE).require ()) |
| 0 | 388 |
| 389 #define REAL_VALUE_TO_TARGET_DOUBLE(IN, OUT) \ | |
| 111 | 390 real_to_target (OUT, &(IN), float_mode_for_size (64).require ()) |
| 0 | 391 |
| 392 /* IN is a REAL_VALUE_TYPE. OUT is a long. */ | |
| 393 #define REAL_VALUE_TO_TARGET_SINGLE(IN, OUT) \ | |
| 111 | 394 ((OUT) = real_to_target (NULL, &(IN), float_mode_for_size (32).require ())) |
| 0 | 395 |
| 396 /* Real values to IEEE 754 decimal floats. */ | |
| 397 | |
| 398 /* IN is a REAL_VALUE_TYPE. OUT is an array of longs. */ | |
| 399 #define REAL_VALUE_TO_TARGET_DECIMAL128(IN, OUT) \ | |
| 111 | 400 real_to_target (OUT, &(IN), decimal_float_mode_for_size (128).require ()) |
| 0 | 401 |
| 402 #define REAL_VALUE_TO_TARGET_DECIMAL64(IN, OUT) \ | |
| 111 | 403 real_to_target (OUT, &(IN), decimal_float_mode_for_size (64).require ()) |
| 0 | 404 |
| 405 /* IN is a REAL_VALUE_TYPE. OUT is a long. */ | |
| 406 #define REAL_VALUE_TO_TARGET_DECIMAL32(IN, OUT) \ | |
| 111 | 407 ((OUT) = real_to_target (NULL, &(IN), \ |
| 408 decimal_float_mode_for_size (32).require ())) | |
| 0 | 409 |
| 111 | 410 extern REAL_VALUE_TYPE real_value_truncate (format_helper, REAL_VALUE_TYPE); |
| 0 | 411 |
|
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b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
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changeset
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412 extern REAL_VALUE_TYPE real_value_negate (const REAL_VALUE_TYPE *); |
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b7f97abdc517
update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
55
diff
changeset
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413 extern REAL_VALUE_TYPE real_value_abs (const REAL_VALUE_TYPE *); |
| 0 | 414 |
| 111 | 415 extern int significand_size (format_helper); |
| 0 | 416 |
| 111 | 417 extern REAL_VALUE_TYPE real_from_string2 (const char *, format_helper); |
| 0 | 418 |
| 419 #define REAL_VALUE_ATOF(s, m) \ | |
| 420 real_from_string2 (s, m) | |
| 421 | |
| 422 #define CONST_DOUBLE_ATOF(s, m) \ | |
| 111 | 423 const_double_from_real_value (real_from_string2 (s, m), m) |
| 0 | 424 |
| 425 #define REAL_VALUE_FIX(r) \ | |
| 426 real_to_integer (&(r)) | |
| 427 | |
| 428 /* ??? Not quite right. */ | |
| 429 #define REAL_VALUE_UNSIGNED_FIX(r) \ | |
| 430 real_to_integer (&(r)) | |
| 431 | |
| 432 /* ??? These were added for Paranoia support. */ | |
| 433 | |
| 434 /* Return floor log2(R). */ | |
| 435 extern int real_exponent (const REAL_VALUE_TYPE *); | |
| 436 | |
| 437 /* R = A * 2**EXP. */ | |
| 438 extern void real_ldexp (REAL_VALUE_TYPE *, const REAL_VALUE_TYPE *, int); | |
| 439 | |
| 440 /* **** End of software floating point emulator interface macros **** */ | |
| 441 | |
| 442 /* Constant real values 0, 1, 2, -1 and 0.5. */ | |
| 443 | |
| 444 extern REAL_VALUE_TYPE dconst0; | |
| 445 extern REAL_VALUE_TYPE dconst1; | |
| 446 extern REAL_VALUE_TYPE dconst2; | |
| 447 extern REAL_VALUE_TYPE dconstm1; | |
| 448 extern REAL_VALUE_TYPE dconsthalf; | |
| 449 | |
| 111 | 450 #define dconst_e() (*dconst_e_ptr ()) |
| 451 #define dconst_third() (*dconst_third_ptr ()) | |
| 452 #define dconst_quarter() (*dconst_quarter_ptr ()) | |
| 453 #define dconst_sixth() (*dconst_sixth_ptr ()) | |
| 454 #define dconst_ninth() (*dconst_ninth_ptr ()) | |
| 455 #define dconst_sqrt2() (*dconst_sqrt2_ptr ()) | |
| 0 | 456 |
| 457 /* Function to return the real value special constant 'e'. */ | |
| 458 extern const REAL_VALUE_TYPE * dconst_e_ptr (void); | |
| 459 | |
| 111 | 460 /* Returns a cached REAL_VALUE_TYPE corresponding to 1/n, for various n. */ |
| 461 extern const REAL_VALUE_TYPE *dconst_third_ptr (void); | |
| 462 extern const REAL_VALUE_TYPE *dconst_quarter_ptr (void); | |
| 463 extern const REAL_VALUE_TYPE *dconst_sixth_ptr (void); | |
| 464 extern const REAL_VALUE_TYPE *dconst_ninth_ptr (void); | |
| 0 | 465 |
| 466 /* Returns the special REAL_VALUE_TYPE corresponding to sqrt(2). */ | |
| 467 extern const REAL_VALUE_TYPE * dconst_sqrt2_ptr (void); | |
| 468 | |
| 469 /* Function to return a real value (not a tree node) | |
| 470 from a given integer constant. */ | |
| 471 REAL_VALUE_TYPE real_value_from_int_cst (const_tree, const_tree); | |
| 472 | |
| 111 | 473 /* Return a CONST_DOUBLE with value R and mode M. */ |
| 474 extern rtx const_double_from_real_value (REAL_VALUE_TYPE, machine_mode); | |
| 0 | 475 |
| 111 | 476 /* Replace R by 1/R in the given format, if the result is exact. */ |
| 477 extern bool exact_real_inverse (format_helper, REAL_VALUE_TYPE *); | |
| 0 | 478 |
| 479 /* Return true if arithmetic on values in IMODE that were promoted | |
| 480 from values in TMODE is equivalent to direct arithmetic on values | |
| 481 in TMODE. */ | |
| 111 | 482 bool real_can_shorten_arithmetic (machine_mode, machine_mode); |
| 0 | 483 |
| 484 /* In tree.c: wrap up a REAL_VALUE_TYPE in a tree node. */ | |
| 485 extern tree build_real (tree, REAL_VALUE_TYPE); | |
| 486 | |
| 111 | 487 /* Likewise, but first truncate the value to the type. */ |
| 488 extern tree build_real_truncate (tree, REAL_VALUE_TYPE); | |
| 0 | 489 |
| 111 | 490 /* Calculate R as X raised to the integer exponent N in format FMT. */ |
| 491 extern bool real_powi (REAL_VALUE_TYPE *, format_helper, | |
| 0 | 492 const REAL_VALUE_TYPE *, HOST_WIDE_INT); |
| 493 | |
| 494 /* Standard round to integer value functions. */ | |
| 111 | 495 extern void real_trunc (REAL_VALUE_TYPE *, format_helper, |
| 0 | 496 const REAL_VALUE_TYPE *); |
| 111 | 497 extern void real_floor (REAL_VALUE_TYPE *, format_helper, |
| 0 | 498 const REAL_VALUE_TYPE *); |
| 111 | 499 extern void real_ceil (REAL_VALUE_TYPE *, format_helper, |
| 0 | 500 const REAL_VALUE_TYPE *); |
| 111 | 501 extern void real_round (REAL_VALUE_TYPE *, format_helper, |
| 0 | 502 const REAL_VALUE_TYPE *); |
| 503 | |
| 504 /* Set the sign of R to the sign of X. */ | |
| 505 extern void real_copysign (REAL_VALUE_TYPE *, const REAL_VALUE_TYPE *); | |
| 506 | |
| 507 /* Check whether the real constant value given is an integer. */ | |
| 111 | 508 extern bool real_isinteger (const REAL_VALUE_TYPE *, format_helper); |
| 509 extern bool real_isinteger (const REAL_VALUE_TYPE *, HOST_WIDE_INT *); | |
| 0 | 510 |
| 131 | 511 /* Calculate nextafter (X, Y) in format FMT. */ |
| 512 extern bool real_nextafter (REAL_VALUE_TYPE *, format_helper, | |
| 513 const REAL_VALUE_TYPE *, const REAL_VALUE_TYPE *); | |
| 514 | |
| 0 | 515 /* Write into BUF the maximum representable finite floating-point |
| 516 number, (1 - b**-p) * b**emax for a given FP format FMT as a hex | |
| 517 float string. BUF must be large enough to contain the result. */ | |
| 518 extern void get_max_float (const struct real_format *, char *, size_t); | |
| 111 | 519 |
| 520 #ifndef GENERATOR_FILE | |
| 521 /* real related routines. */ | |
| 522 extern wide_int real_to_integer (const REAL_VALUE_TYPE *, bool *, int); | |
| 523 extern void real_from_integer (REAL_VALUE_TYPE *, format_helper, | |
| 524 const wide_int_ref &, signop); | |
| 525 #endif | |
| 526 | |
| 131 | 527 /* Fills r with the largest value such that 1 + r*r won't overflow. |
| 528 This is used in both sin (atan (x)) and cos (atan(x)) optimizations. */ | |
| 529 extern void build_sinatan_real (REAL_VALUE_TYPE *, tree); | |
| 530 | |
| 0 | 531 #endif /* ! GCC_REAL_H */ |