Mercurial > hg > CbC > CbC_gcc
annotate gcc/real.h @ 55:77e2b8dfacca gcc-4.4.5
update it from 4.4.3 to 4.5.0
| author | ryoma <e075725@ie.u-ryukyu.ac.jp> |
|---|---|
| date | Fri, 12 Feb 2010 23:39:51 +0900 |
| parents | a06113de4d67 |
| children | b7f97abdc517 |
| rev | line source |
|---|---|
| 0 | 1 /* Definitions of floating-point access for GNU compiler. |
| 2 Copyright (C) 1989, 1991, 1994, 1996, 1997, 1998, 1999, | |
| 3 2000, 2002, 2003, 2004, 2005, 2007, 2008 Free Software Foundation, Inc. | |
| 4 | |
| 5 This file is part of GCC. | |
| 6 | |
| 7 GCC is free software; you can redistribute it and/or modify it under | |
| 8 the terms of the GNU General Public License as published by the Free | |
| 9 Software Foundation; either version 3, or (at your option) any later | |
| 10 version. | |
| 11 | |
| 12 GCC is distributed in the hope that it will be useful, but WITHOUT ANY | |
| 13 WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 15 for more details. | |
| 16 | |
| 17 You should have received a copy of the GNU General Public License | |
| 18 along with GCC; see the file COPYING3. If not see | |
| 19 <http://www.gnu.org/licenses/>. */ | |
| 20 | |
| 21 #ifndef GCC_REAL_H | |
| 22 #define GCC_REAL_H | |
| 23 | |
| 24 #ifndef GENERATOR_FILE | |
| 25 #include <gmp.h> | |
| 26 #include <mpfr.h> | |
|
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27 #include <mpc.h> |
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ryoma <e075725@ie.u-ryukyu.ac.jp>
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28 extern tree do_mpc_arg2 (tree, tree, tree, int, int (*)(mpc_ptr, mpc_srcptr, mpc_srcptr, mpc_rnd_t)); |
| 0 | 29 #endif |
| 30 #include "machmode.h" | |
| 31 | |
| 32 /* An expanded form of the represented number. */ | |
| 33 | |
| 34 /* Enumerate the special cases of numbers that we encounter. */ | |
| 35 enum real_value_class { | |
| 36 rvc_zero, | |
| 37 rvc_normal, | |
| 38 rvc_inf, | |
| 39 rvc_nan | |
| 40 }; | |
| 41 | |
| 42 #define SIGNIFICAND_BITS (128 + HOST_BITS_PER_LONG) | |
| 43 #define EXP_BITS (32 - 6) | |
| 44 #define MAX_EXP ((1 << (EXP_BITS - 1)) - 1) | |
| 45 #define SIGSZ (SIGNIFICAND_BITS / HOST_BITS_PER_LONG) | |
| 46 #define SIG_MSB ((unsigned long)1 << (HOST_BITS_PER_LONG - 1)) | |
| 47 | |
|
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48 struct GTY(()) real_value { |
| 0 | 49 /* Use the same underlying type for all bit-fields, so as to make |
| 50 sure they're packed together, otherwise REAL_VALUE_TYPE_SIZE will | |
| 51 be miscomputed. */ | |
| 52 unsigned int /* ENUM_BITFIELD (real_value_class) */ cl : 2; | |
| 53 unsigned int decimal : 1; | |
| 54 unsigned int sign : 1; | |
| 55 unsigned int signalling : 1; | |
| 56 unsigned int canonical : 1; | |
| 57 unsigned int uexp : EXP_BITS; | |
| 58 unsigned long sig[SIGSZ]; | |
| 59 }; | |
| 60 | |
| 61 #define REAL_EXP(REAL) \ | |
| 62 ((int)((REAL)->uexp ^ (unsigned int)(1 << (EXP_BITS - 1))) \ | |
| 63 - (1 << (EXP_BITS - 1))) | |
| 64 #define SET_REAL_EXP(REAL, EXP) \ | |
| 65 ((REAL)->uexp = ((unsigned int)(EXP) & (unsigned int)((1 << EXP_BITS) - 1))) | |
| 66 | |
| 67 /* Various headers condition prototypes on #ifdef REAL_VALUE_TYPE, so it | |
| 68 needs to be a macro. We do need to continue to have a structure tag | |
| 69 so that other headers can forward declare it. */ | |
| 70 #define REAL_VALUE_TYPE struct real_value | |
| 71 | |
| 72 /* We store a REAL_VALUE_TYPE into an rtx, and we do this by putting it in | |
| 73 consecutive "w" slots. Moreover, we've got to compute the number of "w" | |
| 74 slots at preprocessor time, which means we can't use sizeof. Guess. */ | |
| 75 | |
| 76 #define REAL_VALUE_TYPE_SIZE (SIGNIFICAND_BITS + 32) | |
| 77 #define REAL_WIDTH \ | |
| 78 (REAL_VALUE_TYPE_SIZE/HOST_BITS_PER_WIDE_INT \ | |
| 79 + (REAL_VALUE_TYPE_SIZE%HOST_BITS_PER_WIDE_INT ? 1 : 0)) /* round up */ | |
| 80 | |
| 81 /* Verify the guess. */ | |
| 82 extern char test_real_width | |
| 83 [sizeof(REAL_VALUE_TYPE) <= REAL_WIDTH*sizeof(HOST_WIDE_INT) ? 1 : -1]; | |
| 84 | |
| 85 /* Calculate the format for CONST_DOUBLE. We need as many slots as | |
| 86 are necessary to overlay a REAL_VALUE_TYPE on them. This could be | |
| 87 as many as four (32-bit HOST_WIDE_INT, 128-bit REAL_VALUE_TYPE). | |
| 88 | |
| 89 A number of places assume that there are always at least two 'w' | |
| 90 slots in a CONST_DOUBLE, so we provide them even if one would suffice. */ | |
| 91 | |
| 92 #if REAL_WIDTH == 1 | |
| 93 # define CONST_DOUBLE_FORMAT "ww" | |
| 94 #else | |
| 95 # if REAL_WIDTH == 2 | |
| 96 # define CONST_DOUBLE_FORMAT "ww" | |
| 97 # else | |
| 98 # if REAL_WIDTH == 3 | |
| 99 # define CONST_DOUBLE_FORMAT "www" | |
| 100 # else | |
| 101 # if REAL_WIDTH == 4 | |
| 102 # define CONST_DOUBLE_FORMAT "wwww" | |
| 103 # else | |
| 104 # if REAL_WIDTH == 5 | |
| 105 # define CONST_DOUBLE_FORMAT "wwwww" | |
| 106 # else | |
| 107 # if REAL_WIDTH == 6 | |
| 108 # define CONST_DOUBLE_FORMAT "wwwwww" | |
| 109 # else | |
| 110 #error "REAL_WIDTH > 6 not supported" | |
| 111 # endif | |
| 112 # endif | |
| 113 # endif | |
| 114 # endif | |
| 115 # endif | |
| 116 #endif | |
| 117 | |
| 118 | |
| 119 /* Describes the properties of the specific target format in use. */ | |
| 120 struct real_format | |
| 121 { | |
| 122 /* Move to and from the target bytes. */ | |
| 123 void (*encode) (const struct real_format *, long *, | |
| 124 const REAL_VALUE_TYPE *); | |
| 125 void (*decode) (const struct real_format *, REAL_VALUE_TYPE *, | |
| 126 const long *); | |
| 127 | |
| 128 /* The radix of the exponent and digits of the significand. */ | |
| 129 int b; | |
| 130 | |
| 131 /* Size of the significand in digits of radix B. */ | |
| 132 int p; | |
| 133 | |
| 134 /* Size of the significant of a NaN, in digits of radix B. */ | |
| 135 int pnan; | |
| 136 | |
| 137 /* The minimum negative integer, x, such that b**(x-1) is normalized. */ | |
| 138 int emin; | |
| 139 | |
| 140 /* The maximum integer, x, such that b**(x-1) is representable. */ | |
| 141 int emax; | |
| 142 | |
| 143 /* The bit position of the sign bit, for determining whether a value | |
| 144 is positive/negative, or -1 for a complex encoding. */ | |
| 145 int signbit_ro; | |
| 146 | |
| 147 /* The bit position of the sign bit, for changing the sign of a number, | |
| 148 or -1 for a complex encoding. */ | |
| 149 int signbit_rw; | |
| 150 | |
| 151 /* Default rounding mode for operations on this format. */ | |
| 152 bool round_towards_zero; | |
| 153 bool has_sign_dependent_rounding; | |
| 154 | |
| 155 /* Properties of the format. */ | |
| 156 bool has_nans; | |
| 157 bool has_inf; | |
| 158 bool has_denorm; | |
| 159 bool has_signed_zero; | |
| 160 bool qnan_msb_set; | |
| 161 bool canonical_nan_lsbs_set; | |
| 162 }; | |
| 163 | |
| 164 | |
| 165 /* The target format used for each floating point mode. | |
| 166 Float modes are followed by decimal float modes, with entries for | |
| 167 float modes indexed by (MODE - first float mode), and entries for | |
| 168 decimal float modes indexed by (MODE - first decimal float mode) + | |
| 169 the number of float modes. */ | |
| 170 extern const struct real_format * | |
| 171 real_format_for_mode[MAX_MODE_FLOAT - MIN_MODE_FLOAT + 1 | |
| 172 + MAX_MODE_DECIMAL_FLOAT - MIN_MODE_DECIMAL_FLOAT + 1]; | |
| 173 | |
| 174 #define REAL_MODE_FORMAT(MODE) \ | |
| 175 (real_format_for_mode[DECIMAL_FLOAT_MODE_P (MODE) \ | |
| 176 ? (((MODE) - MIN_MODE_DECIMAL_FLOAT) \ | |
| 177 + (MAX_MODE_FLOAT - MIN_MODE_FLOAT + 1)) \ | |
| 178 : ((MODE) - MIN_MODE_FLOAT)]) | |
| 179 | |
| 180 #define FLOAT_MODE_FORMAT(MODE) \ | |
| 181 (REAL_MODE_FORMAT (SCALAR_FLOAT_MODE_P (MODE)? (MODE) \ | |
| 182 : GET_MODE_INNER (MODE))) | |
| 183 | |
| 184 /* The following macro determines whether the floating point format is | |
| 185 composite, i.e. may contain non-consecutive mantissa bits, in which | |
| 186 case compile-time FP overflow may not model run-time overflow. */ | |
| 187 #define MODE_COMPOSITE_P(MODE) \ | |
| 188 (FLOAT_MODE_P (MODE) \ | |
| 189 && FLOAT_MODE_FORMAT (MODE)->pnan < FLOAT_MODE_FORMAT (MODE)->p) | |
| 190 | |
| 191 /* Accessor macros for format properties. */ | |
| 192 #define MODE_HAS_NANS(MODE) \ | |
| 193 (FLOAT_MODE_P (MODE) && FLOAT_MODE_FORMAT (MODE)->has_nans) | |
| 194 #define MODE_HAS_INFINITIES(MODE) \ | |
| 195 (FLOAT_MODE_P (MODE) && FLOAT_MODE_FORMAT (MODE)->has_inf) | |
| 196 #define MODE_HAS_SIGNED_ZEROS(MODE) \ | |
| 197 (FLOAT_MODE_P (MODE) && FLOAT_MODE_FORMAT (MODE)->has_signed_zero) | |
| 198 #define MODE_HAS_SIGN_DEPENDENT_ROUNDING(MODE) \ | |
| 199 (FLOAT_MODE_P (MODE) \ | |
| 200 && FLOAT_MODE_FORMAT (MODE)->has_sign_dependent_rounding) | |
| 201 | |
| 202 | |
| 203 /* Declare functions in real.c. */ | |
| 204 | |
| 205 /* Binary or unary arithmetic on tree_code. */ | |
| 206 extern bool real_arithmetic (REAL_VALUE_TYPE *, int, const REAL_VALUE_TYPE *, | |
| 207 const REAL_VALUE_TYPE *); | |
| 208 | |
| 209 /* Compare reals by tree_code. */ | |
| 210 extern bool real_compare (int, const REAL_VALUE_TYPE *, const REAL_VALUE_TYPE *); | |
| 211 | |
| 212 /* Determine whether a floating-point value X is infinite. */ | |
| 213 extern bool real_isinf (const REAL_VALUE_TYPE *); | |
| 214 | |
| 215 /* Determine whether a floating-point value X is a NaN. */ | |
| 216 extern bool real_isnan (const REAL_VALUE_TYPE *); | |
| 217 | |
| 218 /* Determine whether a floating-point value X is finite. */ | |
| 219 extern bool real_isfinite (const REAL_VALUE_TYPE *); | |
| 220 | |
| 221 /* Determine whether a floating-point value X is negative. */ | |
| 222 extern bool real_isneg (const REAL_VALUE_TYPE *); | |
| 223 | |
| 224 /* Determine whether a floating-point value X is minus zero. */ | |
| 225 extern bool real_isnegzero (const REAL_VALUE_TYPE *); | |
| 226 | |
| 227 /* Compare two floating-point objects for bitwise identity. */ | |
| 228 extern bool real_identical (const REAL_VALUE_TYPE *, const REAL_VALUE_TYPE *); | |
| 229 | |
| 230 /* Extend or truncate to a new mode. */ | |
| 231 extern void real_convert (REAL_VALUE_TYPE *, enum machine_mode, | |
| 232 const REAL_VALUE_TYPE *); | |
| 233 | |
| 234 /* Return true if truncating to NEW is exact. */ | |
| 235 extern bool exact_real_truncate (enum machine_mode, const REAL_VALUE_TYPE *); | |
| 236 | |
| 237 /* Render R as a decimal floating point constant. */ | |
| 238 extern void real_to_decimal (char *, const REAL_VALUE_TYPE *, size_t, | |
| 239 size_t, int); | |
| 240 | |
| 241 /* Render R as a decimal floating point constant, rounded so as to be | |
| 242 parsed back to the same value when interpreted in mode MODE. */ | |
| 243 extern void real_to_decimal_for_mode (char *, const REAL_VALUE_TYPE *, size_t, | |
| 244 size_t, int, enum machine_mode); | |
| 245 | |
| 246 /* Render R as a hexadecimal floating point constant. */ | |
| 247 extern void real_to_hexadecimal (char *, const REAL_VALUE_TYPE *, | |
| 248 size_t, size_t, int); | |
| 249 | |
| 250 /* Render R as an integer. */ | |
| 251 extern HOST_WIDE_INT real_to_integer (const REAL_VALUE_TYPE *); | |
| 252 extern void real_to_integer2 (HOST_WIDE_INT *, HOST_WIDE_INT *, | |
| 253 const REAL_VALUE_TYPE *); | |
| 254 | |
| 255 /* Initialize R from a decimal or hexadecimal string. Return -1 if | |
| 256 the value underflows, +1 if overflows, and 0 otherwise. */ | |
| 257 extern int real_from_string (REAL_VALUE_TYPE *, const char *); | |
| 258 /* Wrapper to allow different internal representation for decimal floats. */ | |
| 259 extern void real_from_string3 (REAL_VALUE_TYPE *, const char *, enum machine_mode); | |
| 260 | |
| 261 /* Initialize R from an integer pair HIGH/LOW. */ | |
| 262 extern void real_from_integer (REAL_VALUE_TYPE *, enum machine_mode, | |
| 263 unsigned HOST_WIDE_INT, HOST_WIDE_INT, int); | |
| 264 | |
| 265 extern long real_to_target_fmt (long *, const REAL_VALUE_TYPE *, | |
| 266 const struct real_format *); | |
| 267 extern long real_to_target (long *, const REAL_VALUE_TYPE *, enum machine_mode); | |
| 268 | |
| 269 extern void real_from_target_fmt (REAL_VALUE_TYPE *, const long *, | |
| 270 const struct real_format *); | |
| 271 extern void real_from_target (REAL_VALUE_TYPE *, const long *, | |
| 272 enum machine_mode); | |
| 273 | |
| 274 extern void real_inf (REAL_VALUE_TYPE *); | |
| 275 | |
| 276 extern bool real_nan (REAL_VALUE_TYPE *, const char *, int, enum machine_mode); | |
| 277 | |
| 278 extern void real_maxval (REAL_VALUE_TYPE *, int, enum machine_mode); | |
| 279 | |
| 280 extern void real_2expN (REAL_VALUE_TYPE *, int, enum machine_mode); | |
| 281 | |
| 282 extern unsigned int real_hash (const REAL_VALUE_TYPE *); | |
| 283 | |
| 284 | |
| 285 /* Target formats defined in real.c. */ | |
| 286 extern const struct real_format ieee_single_format; | |
| 287 extern const struct real_format mips_single_format; | |
| 288 extern const struct real_format motorola_single_format; | |
| 289 extern const struct real_format spu_single_format; | |
| 290 extern const struct real_format ieee_double_format; | |
| 291 extern const struct real_format mips_double_format; | |
| 292 extern const struct real_format motorola_double_format; | |
| 293 extern const struct real_format ieee_extended_motorola_format; | |
| 294 extern const struct real_format ieee_extended_intel_96_format; | |
| 295 extern const struct real_format ieee_extended_intel_96_round_53_format; | |
| 296 extern const struct real_format ieee_extended_intel_128_format; | |
| 297 extern const struct real_format ibm_extended_format; | |
| 298 extern const struct real_format mips_extended_format; | |
| 299 extern const struct real_format ieee_quad_format; | |
| 300 extern const struct real_format mips_quad_format; | |
| 301 extern const struct real_format vax_f_format; | |
| 302 extern const struct real_format vax_d_format; | |
| 303 extern const struct real_format vax_g_format; | |
| 304 extern const struct real_format real_internal_format; | |
| 305 extern const struct real_format decimal_single_format; | |
| 306 extern const struct real_format decimal_double_format; | |
| 307 extern const struct real_format decimal_quad_format; | |
|
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77e2b8dfacca
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ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
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diff
changeset
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308 extern const struct real_format ieee_half_format; |
|
77e2b8dfacca
update it from 4.4.3 to 4.5.0
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
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309 extern const struct real_format arm_half_format; |
| 0 | 310 |
| 311 | |
| 312 /* ====================================================================== */ | |
| 313 /* Crap. */ | |
| 314 | |
| 315 #define REAL_ARITHMETIC(value, code, d1, d2) \ | |
| 316 real_arithmetic (&(value), code, &(d1), &(d2)) | |
| 317 | |
| 318 #define REAL_VALUES_IDENTICAL(x, y) real_identical (&(x), &(y)) | |
| 319 #define REAL_VALUES_EQUAL(x, y) real_compare (EQ_EXPR, &(x), &(y)) | |
| 320 #define REAL_VALUES_LESS(x, y) real_compare (LT_EXPR, &(x), &(y)) | |
| 321 | |
| 322 /* Determine whether a floating-point value X is infinite. */ | |
| 323 #define REAL_VALUE_ISINF(x) real_isinf (&(x)) | |
| 324 | |
| 325 /* Determine whether a floating-point value X is a NaN. */ | |
| 326 #define REAL_VALUE_ISNAN(x) real_isnan (&(x)) | |
| 327 | |
| 328 /* Determine whether a floating-point value X is negative. */ | |
| 329 #define REAL_VALUE_NEGATIVE(x) real_isneg (&(x)) | |
| 330 | |
| 331 /* Determine whether a floating-point value X is minus zero. */ | |
| 332 #define REAL_VALUE_MINUS_ZERO(x) real_isnegzero (&(x)) | |
| 333 | |
| 334 /* IN is a REAL_VALUE_TYPE. OUT is an array of longs. */ | |
| 335 #define REAL_VALUE_TO_TARGET_LONG_DOUBLE(IN, OUT) \ | |
| 336 real_to_target (OUT, &(IN), \ | |
| 337 mode_for_size (LONG_DOUBLE_TYPE_SIZE, MODE_FLOAT, 0)) | |
| 338 | |
| 339 #define REAL_VALUE_TO_TARGET_DOUBLE(IN, OUT) \ | |
| 340 real_to_target (OUT, &(IN), mode_for_size (64, MODE_FLOAT, 0)) | |
| 341 | |
| 342 /* IN is a REAL_VALUE_TYPE. OUT is a long. */ | |
| 343 #define REAL_VALUE_TO_TARGET_SINGLE(IN, OUT) \ | |
| 344 ((OUT) = real_to_target (NULL, &(IN), mode_for_size (32, MODE_FLOAT, 0))) | |
| 345 | |
| 346 #define REAL_VALUE_FROM_INT(r, lo, hi, mode) \ | |
| 347 real_from_integer (&(r), mode, lo, hi, 0) | |
| 348 | |
| 349 #define REAL_VALUE_FROM_UNSIGNED_INT(r, lo, hi, mode) \ | |
| 350 real_from_integer (&(r), mode, lo, hi, 1) | |
| 351 | |
| 352 /* Real values to IEEE 754 decimal floats. */ | |
| 353 | |
| 354 /* IN is a REAL_VALUE_TYPE. OUT is an array of longs. */ | |
| 355 #define REAL_VALUE_TO_TARGET_DECIMAL128(IN, OUT) \ | |
| 356 real_to_target (OUT, &(IN), mode_for_size (128, MODE_DECIMAL_FLOAT, 0)) | |
| 357 | |
| 358 #define REAL_VALUE_TO_TARGET_DECIMAL64(IN, OUT) \ | |
| 359 real_to_target (OUT, &(IN), mode_for_size (64, MODE_DECIMAL_FLOAT, 0)) | |
| 360 | |
| 361 /* IN is a REAL_VALUE_TYPE. OUT is a long. */ | |
| 362 #define REAL_VALUE_TO_TARGET_DECIMAL32(IN, OUT) \ | |
| 363 ((OUT) = real_to_target (NULL, &(IN), mode_for_size (32, MODE_DECIMAL_FLOAT, 0))) | |
| 364 | |
| 365 extern REAL_VALUE_TYPE real_value_truncate (enum machine_mode, | |
| 366 REAL_VALUE_TYPE); | |
| 367 | |
| 368 #define REAL_VALUE_TO_INT(plow, phigh, r) \ | |
| 369 real_to_integer2 (plow, phigh, &(r)) | |
| 370 | |
| 371 extern REAL_VALUE_TYPE real_arithmetic2 (int, const REAL_VALUE_TYPE *, | |
| 372 const REAL_VALUE_TYPE *); | |
| 373 | |
| 374 #define REAL_VALUE_NEGATE(X) \ | |
| 375 real_arithmetic2 (NEGATE_EXPR, &(X), NULL) | |
| 376 | |
| 377 #define REAL_VALUE_ABS(X) \ | |
| 378 real_arithmetic2 (ABS_EXPR, &(X), NULL) | |
| 379 | |
| 380 extern int significand_size (enum machine_mode); | |
| 381 | |
| 382 extern REAL_VALUE_TYPE real_from_string2 (const char *, enum machine_mode); | |
| 383 | |
| 384 #define REAL_VALUE_ATOF(s, m) \ | |
| 385 real_from_string2 (s, m) | |
| 386 | |
| 387 #define CONST_DOUBLE_ATOF(s, m) \ | |
| 388 CONST_DOUBLE_FROM_REAL_VALUE (real_from_string2 (s, m), m) | |
| 389 | |
| 390 #define REAL_VALUE_FIX(r) \ | |
| 391 real_to_integer (&(r)) | |
| 392 | |
| 393 /* ??? Not quite right. */ | |
| 394 #define REAL_VALUE_UNSIGNED_FIX(r) \ | |
| 395 real_to_integer (&(r)) | |
| 396 | |
| 397 /* ??? These were added for Paranoia support. */ | |
| 398 | |
| 399 /* Return floor log2(R). */ | |
| 400 extern int real_exponent (const REAL_VALUE_TYPE *); | |
| 401 | |
| 402 /* R = A * 2**EXP. */ | |
| 403 extern void real_ldexp (REAL_VALUE_TYPE *, const REAL_VALUE_TYPE *, int); | |
| 404 | |
| 405 /* **** End of software floating point emulator interface macros **** */ | |
| 406 | |
| 407 /* Constant real values 0, 1, 2, -1 and 0.5. */ | |
| 408 | |
| 409 extern REAL_VALUE_TYPE dconst0; | |
| 410 extern REAL_VALUE_TYPE dconst1; | |
| 411 extern REAL_VALUE_TYPE dconst2; | |
| 412 extern REAL_VALUE_TYPE dconstm1; | |
| 413 extern REAL_VALUE_TYPE dconsthalf; | |
| 414 | |
| 415 #define dconst_e() (*dconst_e_ptr ()) | |
| 416 #define dconst_third() (*dconst_third_ptr ()) | |
| 417 #define dconst_sqrt2() (*dconst_sqrt2_ptr ()) | |
| 418 | |
| 419 /* Function to return the real value special constant 'e'. */ | |
| 420 extern const REAL_VALUE_TYPE * dconst_e_ptr (void); | |
| 421 | |
| 422 /* Returns the special REAL_VALUE_TYPE corresponding to 1/3. */ | |
| 423 extern const REAL_VALUE_TYPE * dconst_third_ptr (void); | |
| 424 | |
| 425 /* Returns the special REAL_VALUE_TYPE corresponding to sqrt(2). */ | |
| 426 extern const REAL_VALUE_TYPE * dconst_sqrt2_ptr (void); | |
| 427 | |
| 428 /* Function to return a real value (not a tree node) | |
| 429 from a given integer constant. */ | |
| 430 REAL_VALUE_TYPE real_value_from_int_cst (const_tree, const_tree); | |
| 431 | |
| 432 /* Given a CONST_DOUBLE in FROM, store into TO the value it represents. */ | |
| 433 #define REAL_VALUE_FROM_CONST_DOUBLE(to, from) \ | |
| 434 ((to) = *CONST_DOUBLE_REAL_VALUE (from)) | |
| 435 | |
| 436 /* Return a CONST_DOUBLE with value R and mode M. */ | |
| 437 #define CONST_DOUBLE_FROM_REAL_VALUE(r, m) \ | |
| 438 const_double_from_real_value (r, m) | |
| 439 extern rtx const_double_from_real_value (REAL_VALUE_TYPE, enum machine_mode); | |
| 440 | |
| 441 /* Replace R by 1/R in the given machine mode, if the result is exact. */ | |
| 442 extern bool exact_real_inverse (enum machine_mode, REAL_VALUE_TYPE *); | |
| 443 | |
| 444 /* Return true if arithmetic on values in IMODE that were promoted | |
| 445 from values in TMODE is equivalent to direct arithmetic on values | |
| 446 in TMODE. */ | |
| 447 bool real_can_shorten_arithmetic (enum machine_mode, enum machine_mode); | |
| 448 | |
| 449 /* In tree.c: wrap up a REAL_VALUE_TYPE in a tree node. */ | |
| 450 extern tree build_real (tree, REAL_VALUE_TYPE); | |
| 451 | |
| 452 /* Calculate R as the square root of X in the given machine mode. */ | |
| 453 extern bool real_sqrt (REAL_VALUE_TYPE *, enum machine_mode, | |
| 454 const REAL_VALUE_TYPE *); | |
| 455 | |
| 456 /* Calculate R as X raised to the integer exponent N in mode MODE. */ | |
| 457 extern bool real_powi (REAL_VALUE_TYPE *, enum machine_mode, | |
| 458 const REAL_VALUE_TYPE *, HOST_WIDE_INT); | |
| 459 | |
| 460 /* Standard round to integer value functions. */ | |
| 461 extern void real_trunc (REAL_VALUE_TYPE *, enum machine_mode, | |
| 462 const REAL_VALUE_TYPE *); | |
| 463 extern void real_floor (REAL_VALUE_TYPE *, enum machine_mode, | |
| 464 const REAL_VALUE_TYPE *); | |
| 465 extern void real_ceil (REAL_VALUE_TYPE *, enum machine_mode, | |
| 466 const REAL_VALUE_TYPE *); | |
| 467 extern void real_round (REAL_VALUE_TYPE *, enum machine_mode, | |
| 468 const REAL_VALUE_TYPE *); | |
| 469 | |
| 470 /* Set the sign of R to the sign of X. */ | |
| 471 extern void real_copysign (REAL_VALUE_TYPE *, const REAL_VALUE_TYPE *); | |
| 472 | |
| 473 #ifndef GENERATOR_FILE | |
| 474 /* Convert between MPFR and REAL_VALUE_TYPE. The caller is | |
| 475 responsible for initializing and clearing the MPFR parameter. */ | |
| 476 | |
| 477 extern void real_from_mpfr (REAL_VALUE_TYPE *, mpfr_srcptr, tree, mp_rnd_t); | |
| 478 extern void mpfr_from_real (mpfr_ptr, const REAL_VALUE_TYPE *, mp_rnd_t); | |
| 479 #endif | |
| 480 | |
| 481 /* Check whether the real constant value given is an integer. */ | |
| 482 extern bool real_isinteger (const REAL_VALUE_TYPE *c, enum machine_mode mode); | |
| 483 | |
| 484 /* Write into BUF the maximum representable finite floating-point | |
| 485 number, (1 - b**-p) * b**emax for a given FP format FMT as a hex | |
| 486 float string. BUF must be large enough to contain the result. */ | |
| 487 extern void get_max_float (const struct real_format *, char *, size_t); | |
| 488 #endif /* ! GCC_REAL_H */ |