Mercurial > hg > CbC > CbC_gcc
annotate gcc/real.h @ 104:46ee985e4f0e
fix implementation of rectype in c-decl.c
author | Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp> |
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date | Mon, 09 Apr 2012 19:01:21 +0900 (2012-04-09) |
parents | b7f97abdc517 |
children | 04ced10e8804 |
rev | line source |
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0 | 1 /* Definitions of floating-point access for GNU compiler. |
2 Copyright (C) 1989, 1991, 1994, 1996, 1997, 1998, 1999, | |
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3 2000, 2002, 2003, 2004, 2005, 2007, 2008, 2009, 2010 |
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4 Free Software Foundation, Inc. |
0 | 5 |
6 This file is part of GCC. | |
7 | |
8 GCC is free software; you can redistribute it and/or modify it under | |
9 the terms of the GNU General Public License as published by the Free | |
10 Software Foundation; either version 3, or (at your option) any later | |
11 version. | |
12 | |
13 GCC is distributed in the hope that it will be useful, but WITHOUT ANY | |
14 WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
16 for more details. | |
17 | |
18 You should have received a copy of the GNU General Public License | |
19 along with GCC; see the file COPYING3. If not see | |
20 <http://www.gnu.org/licenses/>. */ | |
21 | |
22 #ifndef GCC_REAL_H | |
23 #define GCC_REAL_H | |
24 | |
25 #include "machmode.h" | |
26 | |
27 /* An expanded form of the represented number. */ | |
28 | |
29 /* Enumerate the special cases of numbers that we encounter. */ | |
30 enum real_value_class { | |
31 rvc_zero, | |
32 rvc_normal, | |
33 rvc_inf, | |
34 rvc_nan | |
35 }; | |
36 | |
37 #define SIGNIFICAND_BITS (128 + HOST_BITS_PER_LONG) | |
38 #define EXP_BITS (32 - 6) | |
39 #define MAX_EXP ((1 << (EXP_BITS - 1)) - 1) | |
40 #define SIGSZ (SIGNIFICAND_BITS / HOST_BITS_PER_LONG) | |
41 #define SIG_MSB ((unsigned long)1 << (HOST_BITS_PER_LONG - 1)) | |
42 | |
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43 struct GTY(()) real_value { |
0 | 44 /* Use the same underlying type for all bit-fields, so as to make |
45 sure they're packed together, otherwise REAL_VALUE_TYPE_SIZE will | |
46 be miscomputed. */ | |
47 unsigned int /* ENUM_BITFIELD (real_value_class) */ cl : 2; | |
48 unsigned int decimal : 1; | |
49 unsigned int sign : 1; | |
50 unsigned int signalling : 1; | |
51 unsigned int canonical : 1; | |
52 unsigned int uexp : EXP_BITS; | |
53 unsigned long sig[SIGSZ]; | |
54 }; | |
55 | |
56 #define REAL_EXP(REAL) \ | |
57 ((int)((REAL)->uexp ^ (unsigned int)(1 << (EXP_BITS - 1))) \ | |
58 - (1 << (EXP_BITS - 1))) | |
59 #define SET_REAL_EXP(REAL, EXP) \ | |
60 ((REAL)->uexp = ((unsigned int)(EXP) & (unsigned int)((1 << EXP_BITS) - 1))) | |
61 | |
62 /* Various headers condition prototypes on #ifdef REAL_VALUE_TYPE, so it | |
63 needs to be a macro. We do need to continue to have a structure tag | |
64 so that other headers can forward declare it. */ | |
65 #define REAL_VALUE_TYPE struct real_value | |
66 | |
67 /* We store a REAL_VALUE_TYPE into an rtx, and we do this by putting it in | |
68 consecutive "w" slots. Moreover, we've got to compute the number of "w" | |
69 slots at preprocessor time, which means we can't use sizeof. Guess. */ | |
70 | |
71 #define REAL_VALUE_TYPE_SIZE (SIGNIFICAND_BITS + 32) | |
72 #define REAL_WIDTH \ | |
73 (REAL_VALUE_TYPE_SIZE/HOST_BITS_PER_WIDE_INT \ | |
74 + (REAL_VALUE_TYPE_SIZE%HOST_BITS_PER_WIDE_INT ? 1 : 0)) /* round up */ | |
75 | |
76 /* Verify the guess. */ | |
77 extern char test_real_width | |
78 [sizeof(REAL_VALUE_TYPE) <= REAL_WIDTH*sizeof(HOST_WIDE_INT) ? 1 : -1]; | |
79 | |
80 /* Calculate the format for CONST_DOUBLE. We need as many slots as | |
81 are necessary to overlay a REAL_VALUE_TYPE on them. This could be | |
82 as many as four (32-bit HOST_WIDE_INT, 128-bit REAL_VALUE_TYPE). | |
83 | |
84 A number of places assume that there are always at least two 'w' | |
85 slots in a CONST_DOUBLE, so we provide them even if one would suffice. */ | |
86 | |
87 #if REAL_WIDTH == 1 | |
88 # define CONST_DOUBLE_FORMAT "ww" | |
89 #else | |
90 # if REAL_WIDTH == 2 | |
91 # define CONST_DOUBLE_FORMAT "ww" | |
92 # else | |
93 # if REAL_WIDTH == 3 | |
94 # define CONST_DOUBLE_FORMAT "www" | |
95 # else | |
96 # if REAL_WIDTH == 4 | |
97 # define CONST_DOUBLE_FORMAT "wwww" | |
98 # else | |
99 # if REAL_WIDTH == 5 | |
100 # define CONST_DOUBLE_FORMAT "wwwww" | |
101 # else | |
102 # if REAL_WIDTH == 6 | |
103 # define CONST_DOUBLE_FORMAT "wwwwww" | |
104 # else | |
105 #error "REAL_WIDTH > 6 not supported" | |
106 # endif | |
107 # endif | |
108 # endif | |
109 # endif | |
110 # endif | |
111 #endif | |
112 | |
113 | |
114 /* Describes the properties of the specific target format in use. */ | |
115 struct real_format | |
116 { | |
117 /* Move to and from the target bytes. */ | |
118 void (*encode) (const struct real_format *, long *, | |
119 const REAL_VALUE_TYPE *); | |
120 void (*decode) (const struct real_format *, REAL_VALUE_TYPE *, | |
121 const long *); | |
122 | |
123 /* The radix of the exponent and digits of the significand. */ | |
124 int b; | |
125 | |
126 /* Size of the significand in digits of radix B. */ | |
127 int p; | |
128 | |
129 /* Size of the significant of a NaN, in digits of radix B. */ | |
130 int pnan; | |
131 | |
132 /* The minimum negative integer, x, such that b**(x-1) is normalized. */ | |
133 int emin; | |
134 | |
135 /* The maximum integer, x, such that b**(x-1) is representable. */ | |
136 int emax; | |
137 | |
138 /* The bit position of the sign bit, for determining whether a value | |
139 is positive/negative, or -1 for a complex encoding. */ | |
140 int signbit_ro; | |
141 | |
142 /* The bit position of the sign bit, for changing the sign of a number, | |
143 or -1 for a complex encoding. */ | |
144 int signbit_rw; | |
145 | |
146 /* Default rounding mode for operations on this format. */ | |
147 bool round_towards_zero; | |
148 bool has_sign_dependent_rounding; | |
149 | |
150 /* Properties of the format. */ | |
151 bool has_nans; | |
152 bool has_inf; | |
153 bool has_denorm; | |
154 bool has_signed_zero; | |
155 bool qnan_msb_set; | |
156 bool canonical_nan_lsbs_set; | |
157 }; | |
158 | |
159 | |
160 /* The target format used for each floating point mode. | |
161 Float modes are followed by decimal float modes, with entries for | |
162 float modes indexed by (MODE - first float mode), and entries for | |
163 decimal float modes indexed by (MODE - first decimal float mode) + | |
164 the number of float modes. */ | |
165 extern const struct real_format * | |
166 real_format_for_mode[MAX_MODE_FLOAT - MIN_MODE_FLOAT + 1 | |
167 + MAX_MODE_DECIMAL_FLOAT - MIN_MODE_DECIMAL_FLOAT + 1]; | |
168 | |
169 #define REAL_MODE_FORMAT(MODE) \ | |
170 (real_format_for_mode[DECIMAL_FLOAT_MODE_P (MODE) \ | |
171 ? (((MODE) - MIN_MODE_DECIMAL_FLOAT) \ | |
172 + (MAX_MODE_FLOAT - MIN_MODE_FLOAT + 1)) \ | |
173 : ((MODE) - MIN_MODE_FLOAT)]) | |
174 | |
175 #define FLOAT_MODE_FORMAT(MODE) \ | |
176 (REAL_MODE_FORMAT (SCALAR_FLOAT_MODE_P (MODE)? (MODE) \ | |
177 : GET_MODE_INNER (MODE))) | |
178 | |
179 /* The following macro determines whether the floating point format is | |
180 composite, i.e. may contain non-consecutive mantissa bits, in which | |
181 case compile-time FP overflow may not model run-time overflow. */ | |
182 #define MODE_COMPOSITE_P(MODE) \ | |
183 (FLOAT_MODE_P (MODE) \ | |
184 && FLOAT_MODE_FORMAT (MODE)->pnan < FLOAT_MODE_FORMAT (MODE)->p) | |
185 | |
186 /* Accessor macros for format properties. */ | |
187 #define MODE_HAS_NANS(MODE) \ | |
188 (FLOAT_MODE_P (MODE) && FLOAT_MODE_FORMAT (MODE)->has_nans) | |
189 #define MODE_HAS_INFINITIES(MODE) \ | |
190 (FLOAT_MODE_P (MODE) && FLOAT_MODE_FORMAT (MODE)->has_inf) | |
191 #define MODE_HAS_SIGNED_ZEROS(MODE) \ | |
192 (FLOAT_MODE_P (MODE) && FLOAT_MODE_FORMAT (MODE)->has_signed_zero) | |
193 #define MODE_HAS_SIGN_DEPENDENT_ROUNDING(MODE) \ | |
194 (FLOAT_MODE_P (MODE) \ | |
195 && FLOAT_MODE_FORMAT (MODE)->has_sign_dependent_rounding) | |
196 | |
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197 /* True if the given mode has a NaN representation and the treatment of |
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198 NaN operands is important. Certain optimizations, such as folding |
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199 x * 0 into 0, are not correct for NaN operands, and are normally |
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200 disabled for modes with NaNs. The user can ask for them to be |
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201 done anyway using the -funsafe-math-optimizations switch. */ |
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202 #define HONOR_NANS(MODE) \ |
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203 (MODE_HAS_NANS (MODE) && !flag_finite_math_only) |
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204 |
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205 /* Like HONOR_NANs, but true if we honor signaling NaNs (or sNaNs). */ |
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206 #define HONOR_SNANS(MODE) (flag_signaling_nans && HONOR_NANS (MODE)) |
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207 |
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208 /* As for HONOR_NANS, but true if the mode can represent infinity and |
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209 the treatment of infinite values is important. */ |
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210 #define HONOR_INFINITIES(MODE) \ |
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211 (MODE_HAS_INFINITIES (MODE) && !flag_finite_math_only) |
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212 |
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213 /* Like HONOR_NANS, but true if the given mode distinguishes between |
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214 positive and negative zero, and the sign of zero is important. */ |
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215 #define HONOR_SIGNED_ZEROS(MODE) \ |
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216 (MODE_HAS_SIGNED_ZEROS (MODE) && flag_signed_zeros) |
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217 |
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218 /* Like HONOR_NANS, but true if given mode supports sign-dependent rounding, |
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219 and the rounding mode is important. */ |
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220 #define HONOR_SIGN_DEPENDENT_ROUNDING(MODE) \ |
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221 (MODE_HAS_SIGN_DEPENDENT_ROUNDING (MODE) && flag_rounding_math) |
0 | 222 |
223 /* Declare functions in real.c. */ | |
224 | |
225 /* Binary or unary arithmetic on tree_code. */ | |
226 extern bool real_arithmetic (REAL_VALUE_TYPE *, int, const REAL_VALUE_TYPE *, | |
227 const REAL_VALUE_TYPE *); | |
228 | |
229 /* Compare reals by tree_code. */ | |
230 extern bool real_compare (int, const REAL_VALUE_TYPE *, const REAL_VALUE_TYPE *); | |
231 | |
232 /* Determine whether a floating-point value X is infinite. */ | |
233 extern bool real_isinf (const REAL_VALUE_TYPE *); | |
234 | |
235 /* Determine whether a floating-point value X is a NaN. */ | |
236 extern bool real_isnan (const REAL_VALUE_TYPE *); | |
237 | |
238 /* Determine whether a floating-point value X is finite. */ | |
239 extern bool real_isfinite (const REAL_VALUE_TYPE *); | |
240 | |
241 /* Determine whether a floating-point value X is negative. */ | |
242 extern bool real_isneg (const REAL_VALUE_TYPE *); | |
243 | |
244 /* Determine whether a floating-point value X is minus zero. */ | |
245 extern bool real_isnegzero (const REAL_VALUE_TYPE *); | |
246 | |
247 /* Compare two floating-point objects for bitwise identity. */ | |
248 extern bool real_identical (const REAL_VALUE_TYPE *, const REAL_VALUE_TYPE *); | |
249 | |
250 /* Extend or truncate to a new mode. */ | |
251 extern void real_convert (REAL_VALUE_TYPE *, enum machine_mode, | |
252 const REAL_VALUE_TYPE *); | |
253 | |
254 /* Return true if truncating to NEW is exact. */ | |
255 extern bool exact_real_truncate (enum machine_mode, const REAL_VALUE_TYPE *); | |
256 | |
257 /* Render R as a decimal floating point constant. */ | |
258 extern void real_to_decimal (char *, const REAL_VALUE_TYPE *, size_t, | |
259 size_t, int); | |
260 | |
261 /* Render R as a decimal floating point constant, rounded so as to be | |
262 parsed back to the same value when interpreted in mode MODE. */ | |
263 extern void real_to_decimal_for_mode (char *, const REAL_VALUE_TYPE *, size_t, | |
264 size_t, int, enum machine_mode); | |
265 | |
266 /* Render R as a hexadecimal floating point constant. */ | |
267 extern void real_to_hexadecimal (char *, const REAL_VALUE_TYPE *, | |
268 size_t, size_t, int); | |
269 | |
270 /* Render R as an integer. */ | |
271 extern HOST_WIDE_INT real_to_integer (const REAL_VALUE_TYPE *); | |
272 extern void real_to_integer2 (HOST_WIDE_INT *, HOST_WIDE_INT *, | |
273 const REAL_VALUE_TYPE *); | |
274 | |
275 /* Initialize R from a decimal or hexadecimal string. Return -1 if | |
276 the value underflows, +1 if overflows, and 0 otherwise. */ | |
277 extern int real_from_string (REAL_VALUE_TYPE *, const char *); | |
278 /* Wrapper to allow different internal representation for decimal floats. */ | |
279 extern void real_from_string3 (REAL_VALUE_TYPE *, const char *, enum machine_mode); | |
280 | |
281 /* Initialize R from an integer pair HIGH/LOW. */ | |
282 extern void real_from_integer (REAL_VALUE_TYPE *, enum machine_mode, | |
283 unsigned HOST_WIDE_INT, HOST_WIDE_INT, int); | |
284 | |
285 extern long real_to_target_fmt (long *, const REAL_VALUE_TYPE *, | |
286 const struct real_format *); | |
287 extern long real_to_target (long *, const REAL_VALUE_TYPE *, enum machine_mode); | |
288 | |
289 extern void real_from_target_fmt (REAL_VALUE_TYPE *, const long *, | |
290 const struct real_format *); | |
291 extern void real_from_target (REAL_VALUE_TYPE *, const long *, | |
292 enum machine_mode); | |
293 | |
294 extern void real_inf (REAL_VALUE_TYPE *); | |
295 | |
296 extern bool real_nan (REAL_VALUE_TYPE *, const char *, int, enum machine_mode); | |
297 | |
298 extern void real_maxval (REAL_VALUE_TYPE *, int, enum machine_mode); | |
299 | |
300 extern void real_2expN (REAL_VALUE_TYPE *, int, enum machine_mode); | |
301 | |
302 extern unsigned int real_hash (const REAL_VALUE_TYPE *); | |
303 | |
304 | |
305 /* Target formats defined in real.c. */ | |
306 extern const struct real_format ieee_single_format; | |
307 extern const struct real_format mips_single_format; | |
308 extern const struct real_format motorola_single_format; | |
309 extern const struct real_format spu_single_format; | |
310 extern const struct real_format ieee_double_format; | |
311 extern const struct real_format mips_double_format; | |
312 extern const struct real_format motorola_double_format; | |
313 extern const struct real_format ieee_extended_motorola_format; | |
314 extern const struct real_format ieee_extended_intel_96_format; | |
315 extern const struct real_format ieee_extended_intel_96_round_53_format; | |
316 extern const struct real_format ieee_extended_intel_128_format; | |
317 extern const struct real_format ibm_extended_format; | |
318 extern const struct real_format mips_extended_format; | |
319 extern const struct real_format ieee_quad_format; | |
320 extern const struct real_format mips_quad_format; | |
321 extern const struct real_format vax_f_format; | |
322 extern const struct real_format vax_d_format; | |
323 extern const struct real_format vax_g_format; | |
324 extern const struct real_format real_internal_format; | |
325 extern const struct real_format decimal_single_format; | |
326 extern const struct real_format decimal_double_format; | |
327 extern const struct real_format decimal_quad_format; | |
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328 extern const struct real_format ieee_half_format; |
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329 extern const struct real_format arm_half_format; |
0 | 330 |
331 | |
332 /* ====================================================================== */ | |
333 /* Crap. */ | |
334 | |
335 #define REAL_ARITHMETIC(value, code, d1, d2) \ | |
336 real_arithmetic (&(value), code, &(d1), &(d2)) | |
337 | |
338 #define REAL_VALUES_IDENTICAL(x, y) real_identical (&(x), &(y)) | |
339 #define REAL_VALUES_EQUAL(x, y) real_compare (EQ_EXPR, &(x), &(y)) | |
340 #define REAL_VALUES_LESS(x, y) real_compare (LT_EXPR, &(x), &(y)) | |
341 | |
342 /* Determine whether a floating-point value X is infinite. */ | |
343 #define REAL_VALUE_ISINF(x) real_isinf (&(x)) | |
344 | |
345 /* Determine whether a floating-point value X is a NaN. */ | |
346 #define REAL_VALUE_ISNAN(x) real_isnan (&(x)) | |
347 | |
348 /* Determine whether a floating-point value X is negative. */ | |
349 #define REAL_VALUE_NEGATIVE(x) real_isneg (&(x)) | |
350 | |
351 /* Determine whether a floating-point value X is minus zero. */ | |
352 #define REAL_VALUE_MINUS_ZERO(x) real_isnegzero (&(x)) | |
353 | |
354 /* IN is a REAL_VALUE_TYPE. OUT is an array of longs. */ | |
355 #define REAL_VALUE_TO_TARGET_LONG_DOUBLE(IN, OUT) \ | |
356 real_to_target (OUT, &(IN), \ | |
357 mode_for_size (LONG_DOUBLE_TYPE_SIZE, MODE_FLOAT, 0)) | |
358 | |
359 #define REAL_VALUE_TO_TARGET_DOUBLE(IN, OUT) \ | |
360 real_to_target (OUT, &(IN), mode_for_size (64, MODE_FLOAT, 0)) | |
361 | |
362 /* IN is a REAL_VALUE_TYPE. OUT is a long. */ | |
363 #define REAL_VALUE_TO_TARGET_SINGLE(IN, OUT) \ | |
364 ((OUT) = real_to_target (NULL, &(IN), mode_for_size (32, MODE_FLOAT, 0))) | |
365 | |
366 #define REAL_VALUE_FROM_INT(r, lo, hi, mode) \ | |
367 real_from_integer (&(r), mode, lo, hi, 0) | |
368 | |
369 #define REAL_VALUE_FROM_UNSIGNED_INT(r, lo, hi, mode) \ | |
370 real_from_integer (&(r), mode, lo, hi, 1) | |
371 | |
372 /* Real values to IEEE 754 decimal floats. */ | |
373 | |
374 /* IN is a REAL_VALUE_TYPE. OUT is an array of longs. */ | |
375 #define REAL_VALUE_TO_TARGET_DECIMAL128(IN, OUT) \ | |
376 real_to_target (OUT, &(IN), mode_for_size (128, MODE_DECIMAL_FLOAT, 0)) | |
377 | |
378 #define REAL_VALUE_TO_TARGET_DECIMAL64(IN, OUT) \ | |
379 real_to_target (OUT, &(IN), mode_for_size (64, MODE_DECIMAL_FLOAT, 0)) | |
380 | |
381 /* IN is a REAL_VALUE_TYPE. OUT is a long. */ | |
382 #define REAL_VALUE_TO_TARGET_DECIMAL32(IN, OUT) \ | |
383 ((OUT) = real_to_target (NULL, &(IN), mode_for_size (32, MODE_DECIMAL_FLOAT, 0))) | |
384 | |
385 extern REAL_VALUE_TYPE real_value_truncate (enum machine_mode, | |
386 REAL_VALUE_TYPE); | |
387 | |
388 #define REAL_VALUE_TO_INT(plow, phigh, r) \ | |
389 real_to_integer2 (plow, phigh, &(r)) | |
390 | |
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update gcc from gcc-4.5.0 to gcc-4.6
ryoma <e075725@ie.u-ryukyu.ac.jp>
parents:
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391 extern REAL_VALUE_TYPE real_value_negate (const REAL_VALUE_TYPE *); |
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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392 extern REAL_VALUE_TYPE real_value_abs (const REAL_VALUE_TYPE *); |
0 | 393 |
394 extern int significand_size (enum machine_mode); | |
395 | |
396 extern REAL_VALUE_TYPE real_from_string2 (const char *, enum machine_mode); | |
397 | |
398 #define REAL_VALUE_ATOF(s, m) \ | |
399 real_from_string2 (s, m) | |
400 | |
401 #define CONST_DOUBLE_ATOF(s, m) \ | |
402 CONST_DOUBLE_FROM_REAL_VALUE (real_from_string2 (s, m), m) | |
403 | |
404 #define REAL_VALUE_FIX(r) \ | |
405 real_to_integer (&(r)) | |
406 | |
407 /* ??? Not quite right. */ | |
408 #define REAL_VALUE_UNSIGNED_FIX(r) \ | |
409 real_to_integer (&(r)) | |
410 | |
411 /* ??? These were added for Paranoia support. */ | |
412 | |
413 /* Return floor log2(R). */ | |
414 extern int real_exponent (const REAL_VALUE_TYPE *); | |
415 | |
416 /* R = A * 2**EXP. */ | |
417 extern void real_ldexp (REAL_VALUE_TYPE *, const REAL_VALUE_TYPE *, int); | |
418 | |
419 /* **** End of software floating point emulator interface macros **** */ | |
420 | |
421 /* Constant real values 0, 1, 2, -1 and 0.5. */ | |
422 | |
423 extern REAL_VALUE_TYPE dconst0; | |
424 extern REAL_VALUE_TYPE dconst1; | |
425 extern REAL_VALUE_TYPE dconst2; | |
426 extern REAL_VALUE_TYPE dconstm1; | |
427 extern REAL_VALUE_TYPE dconsthalf; | |
428 | |
429 #define dconst_e() (*dconst_e_ptr ()) | |
430 #define dconst_third() (*dconst_third_ptr ()) | |
431 #define dconst_sqrt2() (*dconst_sqrt2_ptr ()) | |
432 | |
433 /* Function to return the real value special constant 'e'. */ | |
434 extern const REAL_VALUE_TYPE * dconst_e_ptr (void); | |
435 | |
436 /* Returns the special REAL_VALUE_TYPE corresponding to 1/3. */ | |
437 extern const REAL_VALUE_TYPE * dconst_third_ptr (void); | |
438 | |
439 /* Returns the special REAL_VALUE_TYPE corresponding to sqrt(2). */ | |
440 extern const REAL_VALUE_TYPE * dconst_sqrt2_ptr (void); | |
441 | |
442 /* Function to return a real value (not a tree node) | |
443 from a given integer constant. */ | |
444 REAL_VALUE_TYPE real_value_from_int_cst (const_tree, const_tree); | |
445 | |
446 /* Given a CONST_DOUBLE in FROM, store into TO the value it represents. */ | |
447 #define REAL_VALUE_FROM_CONST_DOUBLE(to, from) \ | |
448 ((to) = *CONST_DOUBLE_REAL_VALUE (from)) | |
449 | |
450 /* Return a CONST_DOUBLE with value R and mode M. */ | |
451 #define CONST_DOUBLE_FROM_REAL_VALUE(r, m) \ | |
452 const_double_from_real_value (r, m) | |
453 extern rtx const_double_from_real_value (REAL_VALUE_TYPE, enum machine_mode); | |
454 | |
455 /* Replace R by 1/R in the given machine mode, if the result is exact. */ | |
456 extern bool exact_real_inverse (enum machine_mode, REAL_VALUE_TYPE *); | |
457 | |
458 /* Return true if arithmetic on values in IMODE that were promoted | |
459 from values in TMODE is equivalent to direct arithmetic on values | |
460 in TMODE. */ | |
461 bool real_can_shorten_arithmetic (enum machine_mode, enum machine_mode); | |
462 | |
463 /* In tree.c: wrap up a REAL_VALUE_TYPE in a tree node. */ | |
464 extern tree build_real (tree, REAL_VALUE_TYPE); | |
465 | |
466 /* Calculate R as the square root of X in the given machine mode. */ | |
467 extern bool real_sqrt (REAL_VALUE_TYPE *, enum machine_mode, | |
468 const REAL_VALUE_TYPE *); | |
469 | |
470 /* Calculate R as X raised to the integer exponent N in mode MODE. */ | |
471 extern bool real_powi (REAL_VALUE_TYPE *, enum machine_mode, | |
472 const REAL_VALUE_TYPE *, HOST_WIDE_INT); | |
473 | |
474 /* Standard round to integer value functions. */ | |
475 extern void real_trunc (REAL_VALUE_TYPE *, enum machine_mode, | |
476 const REAL_VALUE_TYPE *); | |
477 extern void real_floor (REAL_VALUE_TYPE *, enum machine_mode, | |
478 const REAL_VALUE_TYPE *); | |
479 extern void real_ceil (REAL_VALUE_TYPE *, enum machine_mode, | |
480 const REAL_VALUE_TYPE *); | |
481 extern void real_round (REAL_VALUE_TYPE *, enum machine_mode, | |
482 const REAL_VALUE_TYPE *); | |
483 | |
484 /* Set the sign of R to the sign of X. */ | |
485 extern void real_copysign (REAL_VALUE_TYPE *, const REAL_VALUE_TYPE *); | |
486 | |
487 /* Check whether the real constant value given is an integer. */ | |
488 extern bool real_isinteger (const REAL_VALUE_TYPE *c, enum machine_mode mode); | |
489 | |
490 /* Write into BUF the maximum representable finite floating-point | |
491 number, (1 - b**-p) * b**emax for a given FP format FMT as a hex | |
492 float string. BUF must be large enough to contain the result. */ | |
493 extern void get_max_float (const struct real_format *, char *, size_t); | |
494 #endif /* ! GCC_REAL_H */ |