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e9a25f70 | 1 | /* Definitions of floating-point access for GNU compiler. |
d1e082c2 | 2 | Copyright (C) 1989-2013 Free Software Foundation, Inc. |
0694b47c | 3 | |
efdc7e19 | 4 | This file is part of GCC. |
0694b47c | 5 | |
efdc7e19 RH |
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 | |
9dcd6f09 | 8 | Software Foundation; either version 3, or (at your option) any later |
efdc7e19 | 9 | version. |
0694b47c | 10 | |
efdc7e19 RH |
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. | |
0694b47c | 15 | |
efdc7e19 | 16 | You should have received a copy of the GNU General Public License |
9dcd6f09 NC |
17 | along with GCC; see the file COPYING3. If not see |
18 | <http://www.gnu.org/licenses/>. */ | |
0694b47c | 19 | |
88657302 RH |
20 | #ifndef GCC_REAL_H |
21 | #define GCC_REAL_H | |
0694b47c | 22 | |
11ad4784 ZW |
23 | #include "machmode.h" |
24 | ||
0ee6fdb5 | 25 | /* An expanded form of the represented number. */ |
ba31d94e | 26 | |
0ee6fdb5 RH |
27 | /* Enumerate the special cases of numbers that we encounter. */ |
28 | enum real_value_class { | |
29 | rvc_zero, | |
30 | rvc_normal, | |
31 | rvc_inf, | |
32 | rvc_nan | |
33 | }; | |
34 | ||
ee6ff319 | 35 | #define SIGNIFICAND_BITS (128 + HOST_BITS_PER_LONG) |
909e2256 | 36 | #define EXP_BITS (32 - 6) |
0ee6fdb5 RH |
37 | #define MAX_EXP ((1 << (EXP_BITS - 1)) - 1) |
38 | #define SIGSZ (SIGNIFICAND_BITS / HOST_BITS_PER_LONG) | |
39 | #define SIG_MSB ((unsigned long)1 << (HOST_BITS_PER_LONG - 1)) | |
40 | ||
d1b38208 | 41 | struct GTY(()) real_value { |
1e92bbb9 AO |
42 | /* Use the same underlying type for all bit-fields, so as to make |
43 | sure they're packed together, otherwise REAL_VALUE_TYPE_SIZE will | |
44 | be miscomputed. */ | |
e3a64162 | 45 | unsigned int /* ENUM_BITFIELD (real_value_class) */ cl : 2; |
909e2256 | 46 | unsigned int decimal : 1; |
0ee6fdb5 | 47 | unsigned int sign : 1; |
ad59ba20 | 48 | unsigned int signalling : 1; |
fe0002ee | 49 | unsigned int canonical : 1; |
1e92bbb9 | 50 | unsigned int uexp : EXP_BITS; |
0ee6fdb5 RH |
51 | unsigned long sig[SIGSZ]; |
52 | }; | |
fd76a739 | 53 | |
1e92bbb9 AO |
54 | #define REAL_EXP(REAL) \ |
55 | ((int)((REAL)->uexp ^ (unsigned int)(1 << (EXP_BITS - 1))) \ | |
56 | - (1 << (EXP_BITS - 1))) | |
57 | #define SET_REAL_EXP(REAL, EXP) \ | |
58 | ((REAL)->uexp = ((unsigned int)(EXP) & (unsigned int)((1 << EXP_BITS) - 1))) | |
59 | ||
0ee6fdb5 RH |
60 | /* Various headers condition prototypes on #ifdef REAL_VALUE_TYPE, so it |
61 | needs to be a macro. We do need to continue to have a structure tag | |
62 | so that other headers can forward declare it. */ | |
63 | #define REAL_VALUE_TYPE struct real_value | |
64 | ||
65 | /* We store a REAL_VALUE_TYPE into an rtx, and we do this by putting it in | |
66 | consecutive "w" slots. Moreover, we've got to compute the number of "w" | |
67 | slots at preprocessor time, which means we can't use sizeof. Guess. */ | |
68 | ||
69 | #define REAL_VALUE_TYPE_SIZE (SIGNIFICAND_BITS + 32) | |
46468cd9 ZW |
70 | #define REAL_WIDTH \ |
71 | (REAL_VALUE_TYPE_SIZE/HOST_BITS_PER_WIDE_INT \ | |
72 | + (REAL_VALUE_TYPE_SIZE%HOST_BITS_PER_WIDE_INT ? 1 : 0)) /* round up */ | |
efdc7e19 | 73 | |
0ee6fdb5 RH |
74 | /* Verify the guess. */ |
75 | extern char test_real_width | |
76 | [sizeof(REAL_VALUE_TYPE) <= REAL_WIDTH*sizeof(HOST_WIDE_INT) ? 1 : -1]; | |
46468cd9 ZW |
77 | |
78 | /* Calculate the format for CONST_DOUBLE. We need as many slots as | |
79 | are necessary to overlay a REAL_VALUE_TYPE on them. This could be | |
efdc7e19 | 80 | as many as four (32-bit HOST_WIDE_INT, 128-bit REAL_VALUE_TYPE). |
46468cd9 ZW |
81 | |
82 | A number of places assume that there are always at least two 'w' | |
83 | slots in a CONST_DOUBLE, so we provide them even if one would suffice. */ | |
84 | ||
85 | #if REAL_WIDTH == 1 | |
5692c7bc | 86 | # define CONST_DOUBLE_FORMAT "ww" |
46468cd9 ZW |
87 | #else |
88 | # if REAL_WIDTH == 2 | |
5692c7bc | 89 | # define CONST_DOUBLE_FORMAT "ww" |
46468cd9 ZW |
90 | # else |
91 | # if REAL_WIDTH == 3 | |
5692c7bc | 92 | # define CONST_DOUBLE_FORMAT "www" |
46468cd9 ZW |
93 | # else |
94 | # if REAL_WIDTH == 4 | |
5692c7bc | 95 | # define CONST_DOUBLE_FORMAT "wwww" |
46468cd9 ZW |
96 | # else |
97 | # if REAL_WIDTH == 5 | |
5692c7bc | 98 | # define CONST_DOUBLE_FORMAT "wwwww" |
46468cd9 | 99 | # else |
ee6ff319 RH |
100 | # if REAL_WIDTH == 6 |
101 | # define CONST_DOUBLE_FORMAT "wwwwww" | |
102 | # else | |
103 | #error "REAL_WIDTH > 6 not supported" | |
104 | # endif | |
46468cd9 ZW |
105 | # endif |
106 | # endif | |
107 | # endif | |
108 | # endif | |
109 | #endif | |
fd76a739 | 110 | |
84f9b8e9 | 111 | |
3dc85dfb RH |
112 | /* Describes the properties of the specific target format in use. */ |
113 | struct real_format | |
114 | { | |
115 | /* Move to and from the target bytes. */ | |
0c20a65f AJ |
116 | void (*encode) (const struct real_format *, long *, |
117 | const REAL_VALUE_TYPE *); | |
118 | void (*decode) (const struct real_format *, REAL_VALUE_TYPE *, | |
119 | const long *); | |
3dc85dfb RH |
120 | |
121 | /* The radix of the exponent and digits of the significand. */ | |
122 | int b; | |
123 | ||
3dc85dfb RH |
124 | /* Size of the significand in digits of radix B. */ |
125 | int p; | |
126 | ||
fe0002ee AO |
127 | /* Size of the significant of a NaN, in digits of radix B. */ |
128 | int pnan; | |
129 | ||
3dc85dfb RH |
130 | /* The minimum negative integer, x, such that b**(x-1) is normalized. */ |
131 | int emin; | |
132 | ||
133 | /* The maximum integer, x, such that b**(x-1) is representable. */ | |
134 | int emax; | |
135 | ||
b87a0206 RS |
136 | /* The bit position of the sign bit, for determining whether a value |
137 | is positive/negative, or -1 for a complex encoding. */ | |
138 | int signbit_ro; | |
139 | ||
140 | /* The bit position of the sign bit, for changing the sign of a number, | |
141 | or -1 for a complex encoding. */ | |
142 | int signbit_rw; | |
4977bab6 | 143 | |
3e479de3 UW |
144 | /* Default rounding mode for operations on this format. */ |
145 | bool round_towards_zero; | |
4099e2c2 | 146 | bool has_sign_dependent_rounding; |
3e479de3 | 147 | |
3dc85dfb RH |
148 | /* Properties of the format. */ |
149 | bool has_nans; | |
150 | bool has_inf; | |
151 | bool has_denorm; | |
152 | bool has_signed_zero; | |
153 | bool qnan_msb_set; | |
58145e4d | 154 | bool canonical_nan_lsbs_set; |
3dc85dfb RH |
155 | }; |
156 | ||
157 | ||
909e2256 JG |
158 | /* The target format used for each floating point mode. |
159 | Float modes are followed by decimal float modes, with entries for | |
160 | float modes indexed by (MODE - first float mode), and entries for | |
161 | decimal float modes indexed by (MODE - first decimal float mode) + | |
162 | the number of float modes. */ | |
0974c7d7 | 163 | extern const struct real_format * |
909e2256 JG |
164 | real_format_for_mode[MAX_MODE_FLOAT - MIN_MODE_FLOAT + 1 |
165 | + MAX_MODE_DECIMAL_FLOAT - MIN_MODE_DECIMAL_FLOAT + 1]; | |
3dc85dfb | 166 | |
909e2256 JG |
167 | #define REAL_MODE_FORMAT(MODE) \ |
168 | (real_format_for_mode[DECIMAL_FLOAT_MODE_P (MODE) \ | |
4099e2c2 | 169 | ? (((MODE) - MIN_MODE_DECIMAL_FLOAT) \ |
909e2256 | 170 | + (MAX_MODE_FLOAT - MIN_MODE_FLOAT + 1)) \ |
4099e2c2 UW |
171 | : ((MODE) - MIN_MODE_FLOAT)]) |
172 | ||
173 | #define FLOAT_MODE_FORMAT(MODE) \ | |
174 | (REAL_MODE_FORMAT (SCALAR_FLOAT_MODE_P (MODE)? (MODE) \ | |
175 | : GET_MODE_INNER (MODE))) | |
3dc85dfb | 176 | |
762297d9 RS |
177 | /* The following macro determines whether the floating point format is |
178 | composite, i.e. may contain non-consecutive mantissa bits, in which | |
179 | case compile-time FP overflow may not model run-time overflow. */ | |
4099e2c2 UW |
180 | #define MODE_COMPOSITE_P(MODE) \ |
181 | (FLOAT_MODE_P (MODE) \ | |
182 | && FLOAT_MODE_FORMAT (MODE)->pnan < FLOAT_MODE_FORMAT (MODE)->p) | |
183 | ||
184 | /* Accessor macros for format properties. */ | |
185 | #define MODE_HAS_NANS(MODE) \ | |
186 | (FLOAT_MODE_P (MODE) && FLOAT_MODE_FORMAT (MODE)->has_nans) | |
187 | #define MODE_HAS_INFINITIES(MODE) \ | |
188 | (FLOAT_MODE_P (MODE) && FLOAT_MODE_FORMAT (MODE)->has_inf) | |
189 | #define MODE_HAS_SIGNED_ZEROS(MODE) \ | |
190 | (FLOAT_MODE_P (MODE) && FLOAT_MODE_FORMAT (MODE)->has_signed_zero) | |
191 | #define MODE_HAS_SIGN_DEPENDENT_ROUNDING(MODE) \ | |
192 | (FLOAT_MODE_P (MODE) \ | |
193 | && FLOAT_MODE_FORMAT (MODE)->has_sign_dependent_rounding) | |
194 | ||
6a4d4e8a RO |
195 | /* True if the given mode has a NaN representation and the treatment of |
196 | NaN operands is important. Certain optimizations, such as folding | |
197 | x * 0 into 0, are not correct for NaN operands, and are normally | |
198 | disabled for modes with NaNs. The user can ask for them to be | |
199 | done anyway using the -funsafe-math-optimizations switch. */ | |
200 | #define HONOR_NANS(MODE) \ | |
201 | (MODE_HAS_NANS (MODE) && !flag_finite_math_only) | |
202 | ||
203 | /* Like HONOR_NANs, but true if we honor signaling NaNs (or sNaNs). */ | |
204 | #define HONOR_SNANS(MODE) (flag_signaling_nans && HONOR_NANS (MODE)) | |
205 | ||
206 | /* As for HONOR_NANS, but true if the mode can represent infinity and | |
207 | the treatment of infinite values is important. */ | |
208 | #define HONOR_INFINITIES(MODE) \ | |
209 | (MODE_HAS_INFINITIES (MODE) && !flag_finite_math_only) | |
210 | ||
211 | /* Like HONOR_NANS, but true if the given mode distinguishes between | |
212 | positive and negative zero, and the sign of zero is important. */ | |
213 | #define HONOR_SIGNED_ZEROS(MODE) \ | |
214 | (MODE_HAS_SIGNED_ZEROS (MODE) && flag_signed_zeros) | |
215 | ||
216 | /* Like HONOR_NANS, but true if given mode supports sign-dependent rounding, | |
217 | and the rounding mode is important. */ | |
218 | #define HONOR_SIGN_DEPENDENT_ROUNDING(MODE) \ | |
219 | (MODE_HAS_SIGN_DEPENDENT_ROUNDING (MODE) && flag_rounding_math) | |
762297d9 | 220 | |
3dc85dfb | 221 | /* Declare functions in real.c. */ |
fd76a739 | 222 | |
efdc7e19 | 223 | /* Binary or unary arithmetic on tree_code. */ |
d284eb28 | 224 | extern bool real_arithmetic (REAL_VALUE_TYPE *, int, const REAL_VALUE_TYPE *, |
0c20a65f | 225 | const REAL_VALUE_TYPE *); |
efdc7e19 RH |
226 | |
227 | /* Compare reals by tree_code. */ | |
0c20a65f | 228 | extern bool real_compare (int, const REAL_VALUE_TYPE *, const REAL_VALUE_TYPE *); |
efdc7e19 RH |
229 | |
230 | /* Determine whether a floating-point value X is infinite. */ | |
0c20a65f | 231 | extern bool real_isinf (const REAL_VALUE_TYPE *); |
efdc7e19 RH |
232 | |
233 | /* Determine whether a floating-point value X is a NaN. */ | |
0c20a65f | 234 | extern bool real_isnan (const REAL_VALUE_TYPE *); |
efdc7e19 | 235 | |
4c8c70e0 KG |
236 | /* Determine whether a floating-point value X is finite. */ |
237 | extern bool real_isfinite (const REAL_VALUE_TYPE *); | |
238 | ||
efdc7e19 | 239 | /* Determine whether a floating-point value X is negative. */ |
0c20a65f | 240 | extern bool real_isneg (const REAL_VALUE_TYPE *); |
efdc7e19 RH |
241 | |
242 | /* Determine whether a floating-point value X is minus zero. */ | |
0c20a65f | 243 | extern bool real_isnegzero (const REAL_VALUE_TYPE *); |
efdc7e19 RH |
244 | |
245 | /* Compare two floating-point objects for bitwise identity. */ | |
0c20a65f | 246 | extern bool real_identical (const REAL_VALUE_TYPE *, const REAL_VALUE_TYPE *); |
fd76a739 | 247 | |
efdc7e19 | 248 | /* Extend or truncate to a new mode. */ |
0c20a65f AJ |
249 | extern void real_convert (REAL_VALUE_TYPE *, enum machine_mode, |
250 | const REAL_VALUE_TYPE *); | |
efdc7e19 RH |
251 | |
252 | /* Return true if truncating to NEW is exact. */ | |
0c20a65f | 253 | extern bool exact_real_truncate (enum machine_mode, const REAL_VALUE_TYPE *); |
efdc7e19 RH |
254 | |
255 | /* Render R as a decimal floating point constant. */ | |
0c20a65f AJ |
256 | extern void real_to_decimal (char *, const REAL_VALUE_TYPE *, size_t, |
257 | size_t, int); | |
efdc7e19 | 258 | |
3e479de3 UW |
259 | /* Render R as a decimal floating point constant, rounded so as to be |
260 | parsed back to the same value when interpreted in mode MODE. */ | |
261 | extern void real_to_decimal_for_mode (char *, const REAL_VALUE_TYPE *, size_t, | |
262 | size_t, int, enum machine_mode); | |
263 | ||
efdc7e19 | 264 | /* Render R as a hexadecimal floating point constant. */ |
0c20a65f AJ |
265 | extern void real_to_hexadecimal (char *, const REAL_VALUE_TYPE *, |
266 | size_t, size_t, int); | |
efdc7e19 RH |
267 | |
268 | /* Render R as an integer. */ | |
0c20a65f AJ |
269 | extern HOST_WIDE_INT real_to_integer (const REAL_VALUE_TYPE *); |
270 | extern void real_to_integer2 (HOST_WIDE_INT *, HOST_WIDE_INT *, | |
271 | const REAL_VALUE_TYPE *); | |
efdc7e19 | 272 | |
92ef5cf9 MLI |
273 | /* Initialize R from a decimal or hexadecimal string. Return -1 if |
274 | the value underflows, +1 if overflows, and 0 otherwise. */ | |
275 | extern int real_from_string (REAL_VALUE_TYPE *, const char *); | |
909e2256 JG |
276 | /* Wrapper to allow different internal representation for decimal floats. */ |
277 | extern void real_from_string3 (REAL_VALUE_TYPE *, const char *, enum machine_mode); | |
efdc7e19 RH |
278 | |
279 | /* Initialize R from an integer pair HIGH/LOW. */ | |
0c20a65f AJ |
280 | extern void real_from_integer (REAL_VALUE_TYPE *, enum machine_mode, |
281 | unsigned HOST_WIDE_INT, HOST_WIDE_INT, int); | |
8f9eb495 | 282 | |
0c20a65f AJ |
283 | extern long real_to_target_fmt (long *, const REAL_VALUE_TYPE *, |
284 | const struct real_format *); | |
285 | extern long real_to_target (long *, const REAL_VALUE_TYPE *, enum machine_mode); | |
fd76a739 | 286 | |
0c20a65f AJ |
287 | extern void real_from_target_fmt (REAL_VALUE_TYPE *, const long *, |
288 | const struct real_format *); | |
289 | extern void real_from_target (REAL_VALUE_TYPE *, const long *, | |
290 | enum machine_mode); | |
6f4d7222 | 291 | |
0c20a65f | 292 | extern void real_inf (REAL_VALUE_TYPE *); |
fd76a739 | 293 | |
0c20a65f | 294 | extern bool real_nan (REAL_VALUE_TYPE *, const char *, int, enum machine_mode); |
efdc7e19 | 295 | |
0c20a65f | 296 | extern void real_maxval (REAL_VALUE_TYPE *, int, enum machine_mode); |
18c2511c | 297 | |
6ef9a246 | 298 | extern void real_2expN (REAL_VALUE_TYPE *, int, enum machine_mode); |
efdc7e19 | 299 | |
0c20a65f | 300 | extern unsigned int real_hash (const REAL_VALUE_TYPE *); |
46b33600 | 301 | |
3dc85dfb RH |
302 | |
303 | /* Target formats defined in real.c. */ | |
304 | extern const struct real_format ieee_single_format; | |
fe0002ee | 305 | extern const struct real_format mips_single_format; |
b6a9c30c | 306 | extern const struct real_format motorola_single_format; |
88f091f5 | 307 | extern const struct real_format spu_single_format; |
3dc85dfb | 308 | extern const struct real_format ieee_double_format; |
fe0002ee | 309 | extern const struct real_format mips_double_format; |
b6a9c30c | 310 | extern const struct real_format motorola_double_format; |
3dc85dfb RH |
311 | extern const struct real_format ieee_extended_motorola_format; |
312 | extern const struct real_format ieee_extended_intel_96_format; | |
bfa0c519 | 313 | extern const struct real_format ieee_extended_intel_96_round_53_format; |
3dc85dfb | 314 | extern const struct real_format ieee_extended_intel_128_format; |
d454e75a | 315 | extern const struct real_format ibm_extended_format; |
fe0002ee | 316 | extern const struct real_format mips_extended_format; |
3dc85dfb | 317 | extern const struct real_format ieee_quad_format; |
fe0002ee | 318 | extern const struct real_format mips_quad_format; |
3dc85dfb RH |
319 | extern const struct real_format vax_f_format; |
320 | extern const struct real_format vax_d_format; | |
321 | extern const struct real_format vax_g_format; | |
5e26e5a2 | 322 | extern const struct real_format real_internal_format; |
909e2256 JG |
323 | extern const struct real_format decimal_single_format; |
324 | extern const struct real_format decimal_double_format; | |
325 | extern const struct real_format decimal_quad_format; | |
ae63687c SL |
326 | extern const struct real_format ieee_half_format; |
327 | extern const struct real_format arm_half_format; | |
3dc85dfb RH |
328 | |
329 | ||
efdc7e19 RH |
330 | /* ====================================================================== */ |
331 | /* Crap. */ | |
332 | ||
efdc7e19 RH |
333 | #define REAL_ARITHMETIC(value, code, d1, d2) \ |
334 | real_arithmetic (&(value), code, &(d1), &(d2)) | |
335 | ||
336 | #define REAL_VALUES_IDENTICAL(x, y) real_identical (&(x), &(y)) | |
337 | #define REAL_VALUES_EQUAL(x, y) real_compare (EQ_EXPR, &(x), &(y)) | |
338 | #define REAL_VALUES_LESS(x, y) real_compare (LT_EXPR, &(x), &(y)) | |
15e5ad76 | 339 | |
ba31d94e | 340 | /* Determine whether a floating-point value X is infinite. */ |
efdc7e19 | 341 | #define REAL_VALUE_ISINF(x) real_isinf (&(x)) |
ba31d94e ZW |
342 | |
343 | /* Determine whether a floating-point value X is a NaN. */ | |
efdc7e19 | 344 | #define REAL_VALUE_ISNAN(x) real_isnan (&(x)) |
ba31d94e ZW |
345 | |
346 | /* Determine whether a floating-point value X is negative. */ | |
efdc7e19 | 347 | #define REAL_VALUE_NEGATIVE(x) real_isneg (&(x)) |
ba31d94e ZW |
348 | |
349 | /* Determine whether a floating-point value X is minus zero. */ | |
efdc7e19 RH |
350 | #define REAL_VALUE_MINUS_ZERO(x) real_isnegzero (&(x)) |
351 | ||
352 | /* IN is a REAL_VALUE_TYPE. OUT is an array of longs. */ | |
353 | #define REAL_VALUE_TO_TARGET_LONG_DOUBLE(IN, OUT) \ | |
354 | real_to_target (OUT, &(IN), \ | |
355 | mode_for_size (LONG_DOUBLE_TYPE_SIZE, MODE_FLOAT, 0)) | |
fd76a739 | 356 | |
efdc7e19 RH |
357 | #define REAL_VALUE_TO_TARGET_DOUBLE(IN, OUT) \ |
358 | real_to_target (OUT, &(IN), mode_for_size (64, MODE_FLOAT, 0)) | |
91d61207 | 359 | |
efdc7e19 RH |
360 | /* IN is a REAL_VALUE_TYPE. OUT is a long. */ |
361 | #define REAL_VALUE_TO_TARGET_SINGLE(IN, OUT) \ | |
362 | ((OUT) = real_to_target (NULL, &(IN), mode_for_size (32, MODE_FLOAT, 0))) | |
91d61207 | 363 | |
efdc7e19 RH |
364 | #define REAL_VALUE_FROM_INT(r, lo, hi, mode) \ |
365 | real_from_integer (&(r), mode, lo, hi, 0) | |
7bb5d01e | 366 | |
efdc7e19 RH |
367 | #define REAL_VALUE_FROM_UNSIGNED_INT(r, lo, hi, mode) \ |
368 | real_from_integer (&(r), mode, lo, hi, 1) | |
369 | ||
7292b8e4 | 370 | /* Real values to IEEE 754 decimal floats. */ |
909e2256 JG |
371 | |
372 | /* IN is a REAL_VALUE_TYPE. OUT is an array of longs. */ | |
373 | #define REAL_VALUE_TO_TARGET_DECIMAL128(IN, OUT) \ | |
374 | real_to_target (OUT, &(IN), mode_for_size (128, MODE_DECIMAL_FLOAT, 0)) | |
375 | ||
376 | #define REAL_VALUE_TO_TARGET_DECIMAL64(IN, OUT) \ | |
377 | real_to_target (OUT, &(IN), mode_for_size (64, MODE_DECIMAL_FLOAT, 0)) | |
378 | ||
379 | /* IN is a REAL_VALUE_TYPE. OUT is a long. */ | |
380 | #define REAL_VALUE_TO_TARGET_DECIMAL32(IN, OUT) \ | |
381 | ((OUT) = real_to_target (NULL, &(IN), mode_for_size (32, MODE_DECIMAL_FLOAT, 0))) | |
382 | ||
0c20a65f AJ |
383 | extern REAL_VALUE_TYPE real_value_truncate (enum machine_mode, |
384 | REAL_VALUE_TYPE); | |
efdc7e19 RH |
385 | |
386 | #define REAL_VALUE_TO_INT(plow, phigh, r) \ | |
387 | real_to_integer2 (plow, phigh, &(r)) | |
388 | ||
d49b6e1e SB |
389 | extern REAL_VALUE_TYPE real_value_negate (const REAL_VALUE_TYPE *); |
390 | extern REAL_VALUE_TYPE real_value_abs (const REAL_VALUE_TYPE *); | |
7bb6fbd1 | 391 | |
0c20a65f | 392 | extern int significand_size (enum machine_mode); |
7bb6fbd1 | 393 | |
0c20a65f | 394 | extern REAL_VALUE_TYPE real_from_string2 (const char *, enum machine_mode); |
7bb5d01e | 395 | |
efdc7e19 RH |
396 | #define REAL_VALUE_ATOF(s, m) \ |
397 | real_from_string2 (s, m) | |
fd76a739 | 398 | |
efdc7e19 RH |
399 | #define CONST_DOUBLE_ATOF(s, m) \ |
400 | CONST_DOUBLE_FROM_REAL_VALUE (real_from_string2 (s, m), m) | |
401 | ||
402 | #define REAL_VALUE_FIX(r) \ | |
403 | real_to_integer (&(r)) | |
404 | ||
405 | /* ??? Not quite right. */ | |
406 | #define REAL_VALUE_UNSIGNED_FIX(r) \ | |
407 | real_to_integer (&(r)) | |
408 | ||
409 | /* ??? These were added for Paranoia support. */ | |
410 | ||
411 | /* Return floor log2(R). */ | |
0c20a65f | 412 | extern int real_exponent (const REAL_VALUE_TYPE *); |
efdc7e19 RH |
413 | |
414 | /* R = A * 2**EXP. */ | |
0c20a65f | 415 | extern void real_ldexp (REAL_VALUE_TYPE *, const REAL_VALUE_TYPE *, int); |
fd76a739 | 416 | |
fd76a739 | 417 | /* **** End of software floating point emulator interface macros **** */ |
0694b47c | 418 | \f |
aefa9d43 | 419 | /* Constant real values 0, 1, 2, -1 and 0.5. */ |
0694b47c RS |
420 | |
421 | extern REAL_VALUE_TYPE dconst0; | |
422 | extern REAL_VALUE_TYPE dconst1; | |
423 | extern REAL_VALUE_TYPE dconst2; | |
424 | extern REAL_VALUE_TYPE dconstm1; | |
03f2ea93 | 425 | extern REAL_VALUE_TYPE dconsthalf; |
aefa9d43 | 426 | |
9c02cf68 MLI |
427 | #define dconst_e() (*dconst_e_ptr ()) |
428 | #define dconst_third() (*dconst_third_ptr ()) | |
429 | #define dconst_sqrt2() (*dconst_sqrt2_ptr ()) | |
430 | ||
431 | /* Function to return the real value special constant 'e'. */ | |
432 | extern const REAL_VALUE_TYPE * dconst_e_ptr (void); | |
433 | ||
434 | /* Returns the special REAL_VALUE_TYPE corresponding to 1/3. */ | |
435 | extern const REAL_VALUE_TYPE * dconst_third_ptr (void); | |
aefa9d43 | 436 | |
9c02cf68 MLI |
437 | /* Returns the special REAL_VALUE_TYPE corresponding to sqrt(2). */ |
438 | extern const REAL_VALUE_TYPE * dconst_sqrt2_ptr (void); | |
0694b47c | 439 | |
0694b47c RS |
440 | /* Function to return a real value (not a tree node) |
441 | from a given integer constant. */ | |
9566a759 | 442 | REAL_VALUE_TYPE real_value_from_int_cst (const_tree, const_tree); |
0694b47c | 443 | |
efdc7e19 RH |
444 | /* Given a CONST_DOUBLE in FROM, store into TO the value it represents. */ |
445 | #define REAL_VALUE_FROM_CONST_DOUBLE(to, from) \ | |
9e254451 | 446 | ((to) = *CONST_DOUBLE_REAL_VALUE (from)) |
0694b47c RS |
447 | |
448 | /* Return a CONST_DOUBLE with value R and mode M. */ | |
5692c7bc ZW |
449 | #define CONST_DOUBLE_FROM_REAL_VALUE(r, m) \ |
450 | const_double_from_real_value (r, m) | |
0c20a65f | 451 | extern rtx const_double_from_real_value (REAL_VALUE_TYPE, enum machine_mode); |
5692c7bc | 452 | |
ebc8186b | 453 | /* Replace R by 1/R in the given machine mode, if the result is exact. */ |
0c20a65f | 454 | extern bool exact_real_inverse (enum machine_mode, REAL_VALUE_TYPE *); |
ebc8186b | 455 | |
20ded7a6 JM |
456 | /* Return true if arithmetic on values in IMODE that were promoted |
457 | from values in TMODE is equivalent to direct arithmetic on values | |
458 | in TMODE. */ | |
459 | bool real_can_shorten_arithmetic (enum machine_mode, enum machine_mode); | |
460 | ||
11ad4784 | 461 | /* In tree.c: wrap up a REAL_VALUE_TYPE in a tree node. */ |
0c20a65f | 462 | extern tree build_real (tree, REAL_VALUE_TYPE); |
11ad4784 | 463 | |
4977bab6 | 464 | /* Calculate R as the square root of X in the given machine mode. */ |
0c20a65f AJ |
465 | extern bool real_sqrt (REAL_VALUE_TYPE *, enum machine_mode, |
466 | const REAL_VALUE_TYPE *); | |
11ad4784 | 467 | |
71c0e7fc | 468 | /* Calculate R as X raised to the integer exponent N in mode MODE. */ |
0c20a65f AJ |
469 | extern bool real_powi (REAL_VALUE_TYPE *, enum machine_mode, |
470 | const REAL_VALUE_TYPE *, HOST_WIDE_INT); | |
e82a312b | 471 | |
0a9530a9 | 472 | /* Standard round to integer value functions. */ |
0c20a65f AJ |
473 | extern void real_trunc (REAL_VALUE_TYPE *, enum machine_mode, |
474 | const REAL_VALUE_TYPE *); | |
475 | extern void real_floor (REAL_VALUE_TYPE *, enum machine_mode, | |
476 | const REAL_VALUE_TYPE *); | |
477 | extern void real_ceil (REAL_VALUE_TYPE *, enum machine_mode, | |
478 | const REAL_VALUE_TYPE *); | |
25348c94 RS |
479 | extern void real_round (REAL_VALUE_TYPE *, enum machine_mode, |
480 | const REAL_VALUE_TYPE *); | |
0a9530a9 | 481 | |
67057c53 RS |
482 | /* Set the sign of R to the sign of X. */ |
483 | extern void real_copysign (REAL_VALUE_TYPE *, const REAL_VALUE_TYPE *); | |
484 | ||
313f234b MLI |
485 | /* Check whether the real constant value given is an integer. */ |
486 | extern bool real_isinteger (const REAL_VALUE_TYPE *c, enum machine_mode mode); | |
487 | ||
7faa1bbb KG |
488 | /* Write into BUF the maximum representable finite floating-point |
489 | number, (1 - b**-p) * b**emax for a given FP format FMT as a hex | |
490 | float string. BUF must be large enough to contain the result. */ | |
491 | extern void get_max_float (const struct real_format *, char *, size_t); | |
88657302 | 492 | #endif /* ! GCC_REAL_H */ |