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cb60f38d | 1 | /* Define builtin-in macros for the C family front ends. |
ad616de1 | 2 | Copyright (C) 2002, 2003, 2004, 2005 Free Software Foundation, Inc. |
cb60f38d NB |
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 2, 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 COPYING. If not, write to the Free | |
366ccddb KC |
18 | Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA |
19 | 02110-1301, USA. */ | |
cb60f38d NB |
20 | |
21 | #include "config.h" | |
22 | #include "system.h" | |
23 | #include "coretypes.h" | |
24 | #include "tm.h" | |
25 | #include "tree.h" | |
a757585a | 26 | #include "version.h" |
cb60f38d NB |
27 | #include "flags.h" |
28 | #include "real.h" | |
29 | #include "c-common.h" | |
30 | #include "c-pragma.h" | |
31 | #include "output.h" | |
32 | #include "except.h" /* For USING_SJLJ_EXCEPTIONS. */ | |
33 | #include "toplev.h" | |
cd6a5007 | 34 | #include "tm_p.h" /* Target prototypes. */ |
84b8b0e0 | 35 | #include "target.h" |
cb60f38d | 36 | |
4e2e315f NB |
37 | #ifndef TARGET_OS_CPP_BUILTINS |
38 | # define TARGET_OS_CPP_BUILTINS() | |
39 | #endif | |
40 | ||
41 | #ifndef TARGET_OBJFMT_CPP_BUILTINS | |
42 | # define TARGET_OBJFMT_CPP_BUILTINS() | |
43 | #endif | |
44 | ||
cb60f38d NB |
45 | #ifndef REGISTER_PREFIX |
46 | #define REGISTER_PREFIX "" | |
47 | #endif | |
48 | ||
21282b1e | 49 | /* Non-static as some targets don't use it. */ |
35b1a6fa AJ |
50 | void builtin_define_std (const char *) ATTRIBUTE_UNUSED; |
51 | static void builtin_define_with_value_n (const char *, const char *, | |
52 | size_t); | |
53 | static void builtin_define_with_int_value (const char *, HOST_WIDE_INT); | |
54 | static void builtin_define_with_hex_fp_value (const char *, tree, | |
55 | int, const char *, | |
264c41ed | 56 | const char *, |
35b1a6fa | 57 | const char *); |
85291069 | 58 | static void builtin_define_stdint_macros (void); |
35b1a6fa AJ |
59 | static void builtin_define_type_max (const char *, tree, int); |
60 | static void builtin_define_type_precision (const char *, tree); | |
264c41ed CD |
61 | static void builtin_define_float_constants (const char *, |
62 | const char *, | |
63 | const char *, | |
35b1a6fa AJ |
64 | tree); |
65 | static void define__GNUC__ (void); | |
cb60f38d NB |
66 | |
67 | /* Define NAME with value TYPE precision. */ | |
68 | static void | |
35b1a6fa | 69 | builtin_define_type_precision (const char *name, tree type) |
cb60f38d NB |
70 | { |
71 | builtin_define_with_int_value (name, TYPE_PRECISION (type)); | |
72 | } | |
73 | ||
264c41ed CD |
74 | /* Define the float.h constants for TYPE using NAME_PREFIX, FP_SUFFIX, |
75 | and FP_CAST. */ | |
cb60f38d | 76 | static void |
264c41ed CD |
77 | builtin_define_float_constants (const char *name_prefix, |
78 | const char *fp_suffix, | |
79 | const char *fp_cast, | |
80 | tree type) | |
cb60f38d NB |
81 | { |
82 | /* Used to convert radix-based values to base 10 values in several cases. | |
83 | ||
84 | In the max_exp -> max_10_exp conversion for 128-bit IEEE, we need at | |
85 | least 6 significant digits for correct results. Using the fraction | |
86 | formed by (log(2)*1e6)/(log(10)*1e6) overflows a 32-bit integer as an | |
87 | intermediate; perhaps someone can find a better approximation, in the | |
88 | mean time, I suspect using doubles won't harm the bootstrap here. */ | |
89 | ||
90 | const double log10_2 = .30102999566398119521; | |
91 | double log10_b; | |
92 | const struct real_format *fmt; | |
93 | ||
94 | char name[64], buf[128]; | |
95 | int dig, min_10_exp, max_10_exp; | |
96 | int decimal_dig; | |
97 | ||
70a01792 | 98 | fmt = REAL_MODE_FORMAT (TYPE_MODE (type)); |
9a8ce21f | 99 | gcc_assert (fmt->b != 10); |
cb60f38d NB |
100 | |
101 | /* The radix of the exponent representation. */ | |
102 | if (type == float_type_node) | |
103 | builtin_define_with_int_value ("__FLT_RADIX__", fmt->b); | |
104 | log10_b = log10_2 * fmt->log2_b; | |
105 | ||
106 | /* The number of radix digits, p, in the floating-point significand. */ | |
107 | sprintf (name, "__%s_MANT_DIG__", name_prefix); | |
108 | builtin_define_with_int_value (name, fmt->p); | |
109 | ||
110 | /* The number of decimal digits, q, such that any floating-point number | |
111 | with q decimal digits can be rounded into a floating-point number with | |
112 | p radix b digits and back again without change to the q decimal digits, | |
113 | ||
114 | p log10 b if b is a power of 10 | |
35b1a6fa | 115 | floor((p - 1) log10 b) otherwise |
cb60f38d NB |
116 | */ |
117 | dig = (fmt->p - 1) * log10_b; | |
118 | sprintf (name, "__%s_DIG__", name_prefix); | |
119 | builtin_define_with_int_value (name, dig); | |
120 | ||
121 | /* The minimum negative int x such that b**(x-1) is a normalized float. */ | |
122 | sprintf (name, "__%s_MIN_EXP__", name_prefix); | |
123 | sprintf (buf, "(%d)", fmt->emin); | |
124 | builtin_define_with_value (name, buf, 0); | |
125 | ||
126 | /* The minimum negative int x such that 10**x is a normalized float, | |
127 | ||
128 | ceil (log10 (b ** (emin - 1))) | |
129 | = ceil (log10 (b) * (emin - 1)) | |
130 | ||
131 | Recall that emin is negative, so the integer truncation calculates | |
132 | the ceiling, not the floor, in this case. */ | |
133 | min_10_exp = (fmt->emin - 1) * log10_b; | |
134 | sprintf (name, "__%s_MIN_10_EXP__", name_prefix); | |
135 | sprintf (buf, "(%d)", min_10_exp); | |
136 | builtin_define_with_value (name, buf, 0); | |
137 | ||
138 | /* The maximum int x such that b**(x-1) is a representable float. */ | |
139 | sprintf (name, "__%s_MAX_EXP__", name_prefix); | |
140 | builtin_define_with_int_value (name, fmt->emax); | |
141 | ||
142 | /* The maximum int x such that 10**x is in the range of representable | |
143 | finite floating-point numbers, | |
144 | ||
145 | floor (log10((1 - b**-p) * b**emax)) | |
146 | = floor (log10(1 - b**-p) + log10(b**emax)) | |
147 | = floor (log10(1 - b**-p) + log10(b)*emax) | |
148 | ||
149 | The safest thing to do here is to just compute this number. But since | |
150 | we don't link cc1 with libm, we cannot. We could implement log10 here | |
151 | a series expansion, but that seems too much effort because: | |
152 | ||
153 | Note that the first term, for all extant p, is a number exceedingly close | |
154 | to zero, but slightly negative. Note that the second term is an integer | |
155 | scaling an irrational number, and that because of the floor we are only | |
156 | interested in its integral portion. | |
157 | ||
158 | In order for the first term to have any effect on the integral portion | |
159 | of the second term, the second term has to be exceedingly close to an | |
160 | integer itself (e.g. 123.000000000001 or something). Getting a result | |
161 | that close to an integer requires that the irrational multiplicand have | |
162 | a long series of zeros in its expansion, which doesn't occur in the | |
163 | first 20 digits or so of log10(b). | |
164 | ||
165 | Hand-waving aside, crunching all of the sets of constants above by hand | |
166 | does not yield a case for which the first term is significant, which | |
167 | in the end is all that matters. */ | |
168 | max_10_exp = fmt->emax * log10_b; | |
169 | sprintf (name, "__%s_MAX_10_EXP__", name_prefix); | |
170 | builtin_define_with_int_value (name, max_10_exp); | |
171 | ||
172 | /* The number of decimal digits, n, such that any floating-point number | |
173 | can be rounded to n decimal digits and back again without change to | |
35b1a6fa | 174 | the value. |
cb60f38d NB |
175 | |
176 | p * log10(b) if b is a power of 10 | |
177 | ceil(1 + p * log10(b)) otherwise | |
178 | ||
179 | The only macro we care about is this number for the widest supported | |
180 | floating type, but we want this value for rendering constants below. */ | |
181 | { | |
182 | double d_decimal_dig = 1 + fmt->p * log10_b; | |
183 | decimal_dig = d_decimal_dig; | |
184 | if (decimal_dig < d_decimal_dig) | |
185 | decimal_dig++; | |
186 | } | |
187 | if (type == long_double_type_node) | |
188 | builtin_define_with_int_value ("__DECIMAL_DIG__", decimal_dig); | |
189 | ||
190 | /* Since, for the supported formats, B is always a power of 2, we | |
191 | construct the following numbers directly as a hexadecimal | |
192 | constants. */ | |
193 | ||
194 | /* The maximum representable finite floating-point number, | |
195 | (1 - b**-p) * b**emax */ | |
196 | { | |
197 | int i, n; | |
198 | char *p; | |
199 | ||
200 | strcpy (buf, "0x0."); | |
201 | n = fmt->p * fmt->log2_b; | |
202 | for (i = 0, p = buf + 4; i + 3 < n; i += 4) | |
203 | *p++ = 'f'; | |
204 | if (i < n) | |
205 | *p++ = "08ce"[n - i]; | |
206 | sprintf (p, "p%d", fmt->emax * fmt->log2_b); | |
ddc68564 AM |
207 | if (fmt->pnan < fmt->p) |
208 | { | |
209 | /* This is an IBM extended double format made up of two IEEE | |
210 | doubles. The value of the long double is the sum of the | |
211 | values of the two parts. The most significant part is | |
212 | required to be the value of the long double rounded to the | |
213 | nearest double. Rounding means we need a slightly smaller | |
214 | value for LDBL_MAX. */ | |
215 | buf[4 + fmt->pnan / 4] = "7bde"[fmt->pnan % 4]; | |
216 | } | |
cb60f38d NB |
217 | } |
218 | sprintf (name, "__%s_MAX__", name_prefix); | |
264c41ed | 219 | builtin_define_with_hex_fp_value (name, type, decimal_dig, buf, fp_suffix, fp_cast); |
cb60f38d NB |
220 | |
221 | /* The minimum normalized positive floating-point number, | |
222 | b**(emin-1). */ | |
223 | sprintf (name, "__%s_MIN__", name_prefix); | |
224 | sprintf (buf, "0x1p%d", (fmt->emin - 1) * fmt->log2_b); | |
264c41ed | 225 | builtin_define_with_hex_fp_value (name, type, decimal_dig, buf, fp_suffix, fp_cast); |
cb60f38d NB |
226 | |
227 | /* The difference between 1 and the least value greater than 1 that is | |
228 | representable in the given floating point type, b**(1-p). */ | |
229 | sprintf (name, "__%s_EPSILON__", name_prefix); | |
59d7d767 GK |
230 | if (fmt->pnan < fmt->p) |
231 | /* This is an IBM extended double format, so 1.0 + any double is | |
232 | representable precisely. */ | |
233 | sprintf (buf, "0x1p%d", (fmt->emin - fmt->p) * fmt->log2_b); | |
234 | else | |
235 | sprintf (buf, "0x1p%d", (1 - fmt->p) * fmt->log2_b); | |
264c41ed | 236 | builtin_define_with_hex_fp_value (name, type, decimal_dig, buf, fp_suffix, fp_cast); |
cb60f38d NB |
237 | |
238 | /* For C++ std::numeric_limits<T>::denorm_min. The minimum denormalized | |
239 | positive floating-point number, b**(emin-p). Zero for formats that | |
240 | don't support denormals. */ | |
241 | sprintf (name, "__%s_DENORM_MIN__", name_prefix); | |
242 | if (fmt->has_denorm) | |
243 | { | |
244 | sprintf (buf, "0x1p%d", (fmt->emin - fmt->p) * fmt->log2_b); | |
245 | builtin_define_with_hex_fp_value (name, type, decimal_dig, | |
264c41ed | 246 | buf, fp_suffix, fp_cast); |
cb60f38d NB |
247 | } |
248 | else | |
249 | { | |
250 | sprintf (buf, "0.0%s", fp_suffix); | |
251 | builtin_define_with_value (name, buf, 0); | |
252 | } | |
253 | ||
264c41ed CD |
254 | sprintf (name, "__%s_HAS_DENORM__", name_prefix); |
255 | builtin_define_with_value (name, fmt->has_denorm ? "1" : "0", 0); | |
256 | ||
cb60f38d NB |
257 | /* For C++ std::numeric_limits<T>::has_infinity. */ |
258 | sprintf (name, "__%s_HAS_INFINITY__", name_prefix); | |
35b1a6fa | 259 | builtin_define_with_int_value (name, |
cb60f38d NB |
260 | MODE_HAS_INFINITIES (TYPE_MODE (type))); |
261 | /* For C++ std::numeric_limits<T>::has_quiet_NaN. We do not have a | |
262 | predicate to distinguish a target that has both quiet and | |
263 | signalling NaNs from a target that has only quiet NaNs or only | |
264 | signalling NaNs, so we assume that a target that has any kind of | |
265 | NaN has quiet NaNs. */ | |
266 | sprintf (name, "__%s_HAS_QUIET_NAN__", name_prefix); | |
267 | builtin_define_with_int_value (name, MODE_HAS_NANS (TYPE_MODE (type))); | |
268 | } | |
269 | ||
9a8ce21f JG |
270 | /* Define __DECx__ constants for TYPE using NAME_PREFIX and SUFFIX. */ |
271 | static void | |
272 | builtin_define_decimal_float_constants (const char *name_prefix, | |
273 | const char *suffix, | |
274 | tree type) | |
275 | { | |
276 | const struct real_format *fmt; | |
277 | char name[64], buf[128], *p; | |
278 | int digits; | |
279 | ||
280 | fmt = REAL_MODE_FORMAT (TYPE_MODE (type)); | |
281 | ||
282 | /* The number of radix digits, p, in the significand. */ | |
283 | sprintf (name, "__%s_MANT_DIG__", name_prefix); | |
284 | builtin_define_with_int_value (name, fmt->p); | |
285 | ||
286 | /* The minimum negative int x such that b**(x-1) is a normalized float. */ | |
287 | sprintf (name, "__%s_MIN_EXP__", name_prefix); | |
288 | sprintf (buf, "(%d)", fmt->emin); | |
289 | builtin_define_with_value (name, buf, 0); | |
290 | ||
291 | /* The maximum int x such that b**(x-1) is a representable float. */ | |
292 | sprintf (name, "__%s_MAX_EXP__", name_prefix); | |
293 | builtin_define_with_int_value (name, fmt->emax); | |
294 | ||
295 | /* Compute the minimum representable value. */ | |
296 | sprintf (name, "__%s_MIN__", name_prefix); | |
297 | sprintf (buf, "1E%d%s", fmt->emin, suffix); | |
298 | builtin_define_with_value (name, buf, 0); | |
299 | ||
300 | /* Compute the maximum representable value. */ | |
301 | sprintf (name, "__%s_MAX__", name_prefix); | |
302 | p = buf; | |
303 | for (digits = fmt->p; digits; digits--) | |
304 | { | |
305 | *p++ = '9'; | |
306 | if (digits == fmt->p) | |
307 | *p++ = '.'; | |
308 | } | |
309 | *p = 0; | |
310 | /* fmt->p plus 1, to account for the decimal point. */ | |
311 | sprintf (&buf[fmt->p + 1], "E%d%s", fmt->emax, suffix); | |
312 | builtin_define_with_value (name, buf, 0); | |
313 | ||
314 | /* Compute epsilon (the difference between 1 and least value greater | |
315 | than 1 representable). */ | |
316 | sprintf (name, "__%s_EPSILON__", name_prefix); | |
317 | sprintf (buf, "1E-%d%s", fmt->p - 1, suffix); | |
318 | builtin_define_with_value (name, buf, 0); | |
319 | ||
320 | /* Minimum denormalized postive decimal value. */ | |
321 | sprintf (name, "__%s_DEN__", name_prefix); | |
322 | p = buf; | |
323 | for (digits = fmt->p; digits > 1; digits--) | |
324 | { | |
325 | *p++ = '0'; | |
326 | if (digits == fmt->p) | |
327 | *p++ = '.'; | |
328 | } | |
329 | *p = 0; | |
330 | sprintf (&buf[fmt->p], "1E%d%s", fmt->emin, suffix); | |
331 | builtin_define_with_value (name, buf, 0); | |
332 | } | |
333 | ||
cb60f38d NB |
334 | /* Define __GNUC__, __GNUC_MINOR__ and __GNUC_PATCHLEVEL__. */ |
335 | static void | |
35b1a6fa | 336 | define__GNUC__ (void) |
cb60f38d NB |
337 | { |
338 | /* The format of the version string, enforced below, is | |
339 | ([^0-9]*-)?[0-9]+[.][0-9]+([.][0-9]+)?([- ].*)? */ | |
340 | const char *q, *v = version_string; | |
341 | ||
3f75a254 | 342 | while (*v && !ISDIGIT (*v)) |
cb60f38d | 343 | v++; |
366de0ce | 344 | gcc_assert (*v && (v <= version_string || v[-1] == '-')); |
cb60f38d NB |
345 | |
346 | q = v; | |
347 | while (ISDIGIT (*v)) | |
348 | v++; | |
349 | builtin_define_with_value_n ("__GNUC__", q, v - q); | |
37fa72e9 | 350 | if (c_dialect_cxx ()) |
cb60f38d NB |
351 | builtin_define_with_value_n ("__GNUG__", q, v - q); |
352 | ||
a101957b | 353 | gcc_assert (*v == '.' && ISDIGIT (v[1])); |
366de0ce | 354 | |
cb60f38d NB |
355 | q = ++v; |
356 | while (ISDIGIT (*v)) | |
357 | v++; | |
358 | builtin_define_with_value_n ("__GNUC_MINOR__", q, v - q); | |
359 | ||
360 | if (*v == '.') | |
361 | { | |
366de0ce | 362 | gcc_assert (ISDIGIT (v[1])); |
cb60f38d NB |
363 | q = ++v; |
364 | while (ISDIGIT (*v)) | |
365 | v++; | |
366 | builtin_define_with_value_n ("__GNUC_PATCHLEVEL__", q, v - q); | |
367 | } | |
368 | else | |
369 | builtin_define_with_value_n ("__GNUC_PATCHLEVEL__", "0", 1); | |
370 | ||
366de0ce | 371 | gcc_assert (!*v || *v == ' ' || *v == '-'); |
cb60f38d NB |
372 | } |
373 | ||
85291069 JM |
374 | /* Define macros used by <stdint.h>. Currently only defines limits |
375 | for intmax_t, used by the testsuite. */ | |
376 | static void | |
377 | builtin_define_stdint_macros (void) | |
378 | { | |
379 | int intmax_long; | |
380 | if (intmax_type_node == long_long_integer_type_node) | |
381 | intmax_long = 2; | |
382 | else if (intmax_type_node == long_integer_type_node) | |
383 | intmax_long = 1; | |
384 | else if (intmax_type_node == integer_type_node) | |
385 | intmax_long = 0; | |
386 | else | |
366de0ce | 387 | gcc_unreachable (); |
85291069 JM |
388 | builtin_define_type_max ("__INTMAX_MAX__", intmax_type_node, intmax_long); |
389 | } | |
390 | ||
cb60f38d NB |
391 | /* Hook that registers front end and target-specific built-ins. */ |
392 | void | |
35b1a6fa | 393 | c_cpp_builtins (cpp_reader *pfile) |
cb60f38d NB |
394 | { |
395 | /* -undef turns off target-specific built-ins. */ | |
396 | if (flag_undef) | |
397 | return; | |
398 | ||
399 | define__GNUC__ (); | |
400 | ||
401 | /* For stddef.h. They require macros defined in c-common.c. */ | |
402 | c_stddef_cpp_builtins (); | |
403 | ||
37fa72e9 | 404 | if (c_dialect_cxx ()) |
cb60f38d | 405 | { |
aee7846e | 406 | if (flag_weak && SUPPORTS_ONE_ONLY) |
cb60f38d NB |
407 | cpp_define (pfile, "__GXX_WEAK__=1"); |
408 | else | |
409 | cpp_define (pfile, "__GXX_WEAK__=0"); | |
cb60f38d NB |
410 | if (warn_deprecated) |
411 | cpp_define (pfile, "__DEPRECATED"); | |
412 | } | |
6cd77c3f RH |
413 | /* Note that we define this for C as well, so that we know if |
414 | __attribute__((cleanup)) will interface with EH. */ | |
2288bdbb RH |
415 | if (flag_exceptions) |
416 | cpp_define (pfile, "__EXCEPTIONS"); | |
cb60f38d | 417 | |
e0a21ab9 | 418 | /* Represents the C++ ABI version, always defined so it can be used while |
cb60f38d | 419 | preprocessing C and assembler. */ |
57702a80 MM |
420 | if (flag_abi_version == 0) |
421 | /* Use a very large value so that: | |
422 | ||
423 | #if __GXX_ABI_VERSION >= <value for version X> | |
424 | ||
425 | will work whether the user explicitly says "-fabi-version=x" or | |
426 | "-fabi-version=0". Do not use INT_MAX because that will be | |
427 | different from system to system. */ | |
428 | builtin_define_with_int_value ("__GXX_ABI_VERSION", 999999); | |
429 | else if (flag_abi_version == 1) | |
1f838355 | 430 | /* Due to a historical accident, this version had the value |
57702a80 MM |
431 | "102". */ |
432 | builtin_define_with_int_value ("__GXX_ABI_VERSION", 102); | |
433 | else | |
e0a21ab9 | 434 | /* Newer versions have values 1002, 1003, .... */ |
57702a80 MM |
435 | builtin_define_with_int_value ("__GXX_ABI_VERSION", |
436 | 1000 + flag_abi_version); | |
cb60f38d NB |
437 | |
438 | /* libgcc needs to know this. */ | |
439 | if (USING_SJLJ_EXCEPTIONS) | |
440 | cpp_define (pfile, "__USING_SJLJ_EXCEPTIONS__"); | |
441 | ||
442 | /* limits.h needs to know these. */ | |
443 | builtin_define_type_max ("__SCHAR_MAX__", signed_char_type_node, 0); | |
444 | builtin_define_type_max ("__SHRT_MAX__", short_integer_type_node, 0); | |
445 | builtin_define_type_max ("__INT_MAX__", integer_type_node, 0); | |
446 | builtin_define_type_max ("__LONG_MAX__", long_integer_type_node, 1); | |
447 | builtin_define_type_max ("__LONG_LONG_MAX__", long_long_integer_type_node, 2); | |
448 | builtin_define_type_max ("__WCHAR_MAX__", wchar_type_node, 0); | |
449 | ||
450 | builtin_define_type_precision ("__CHAR_BIT__", char_type_node); | |
451 | ||
85291069 JM |
452 | /* stdint.h (eventually) and the testsuite need to know these. */ |
453 | builtin_define_stdint_macros (); | |
454 | ||
cb60f38d NB |
455 | /* float.h needs to know these. */ |
456 | ||
457 | builtin_define_with_int_value ("__FLT_EVAL_METHOD__", | |
458 | TARGET_FLT_EVAL_METHOD); | |
459 | ||
9a8ce21f JG |
460 | /* And decfloat.h needs this. */ |
461 | builtin_define_with_int_value ("__DEC_EVAL_METHOD__", | |
462 | TARGET_DEC_EVAL_METHOD); | |
463 | ||
264c41ed CD |
464 | builtin_define_float_constants ("FLT", "F", "%s", float_type_node); |
465 | /* Cast the double precision constants when single precision constants are | |
466 | specified. The correct result is computed by the compiler when using | |
467 | macros that include a cast. This has the side-effect of making the value | |
468 | unusable in const expressions. */ | |
469 | if (flag_single_precision_constant) | |
470 | builtin_define_float_constants ("DBL", "L", "((double)%s)", double_type_node); | |
471 | else | |
472 | builtin_define_float_constants ("DBL", "", "%s", double_type_node); | |
473 | builtin_define_float_constants ("LDBL", "L", "%s", long_double_type_node); | |
cb60f38d | 474 | |
9a8ce21f JG |
475 | /* For decfloat.h. */ |
476 | builtin_define_decimal_float_constants ("DEC32", "DF", dfloat32_type_node); | |
477 | builtin_define_decimal_float_constants ("DEC64", "DD", dfloat64_type_node); | |
478 | builtin_define_decimal_float_constants ("DEC128", "DL", dfloat128_type_node); | |
479 | ||
cb60f38d NB |
480 | /* For use in assembly language. */ |
481 | builtin_define_with_value ("__REGISTER_PREFIX__", REGISTER_PREFIX, 0); | |
482 | builtin_define_with_value ("__USER_LABEL_PREFIX__", user_label_prefix, 0); | |
483 | ||
484 | /* Misc. */ | |
485 | builtin_define_with_value ("__VERSION__", version_string, 1); | |
486 | ||
00530a21 AJ |
487 | /* Definitions for LP64 model. */ |
488 | if (TYPE_PRECISION (long_integer_type_node) == 64 | |
489 | && POINTER_SIZE == 64 | |
490 | && TYPE_PRECISION (integer_type_node) == 32) | |
491 | { | |
492 | cpp_define (pfile, "_LP64"); | |
493 | cpp_define (pfile, "__LP64__"); | |
494 | } | |
35b1a6fa | 495 | |
cb60f38d NB |
496 | /* Other target-independent built-ins determined by command-line |
497 | options. */ | |
498 | if (optimize_size) | |
499 | cpp_define (pfile, "__OPTIMIZE_SIZE__"); | |
500 | if (optimize) | |
501 | cpp_define (pfile, "__OPTIMIZE__"); | |
502 | ||
cb60f38d NB |
503 | if (fast_math_flags_set_p ()) |
504 | cpp_define (pfile, "__FAST_MATH__"); | |
505 | if (flag_really_no_inline) | |
506 | cpp_define (pfile, "__NO_INLINE__"); | |
507 | if (flag_signaling_nans) | |
508 | cpp_define (pfile, "__SUPPORT_SNAN__"); | |
509 | if (flag_finite_math_only) | |
510 | cpp_define (pfile, "__FINITE_MATH_ONLY__=1"); | |
511 | else | |
512 | cpp_define (pfile, "__FINITE_MATH_ONLY__=0"); | |
3d119f8f KG |
513 | if (flag_pic) |
514 | { | |
515 | builtin_define_with_int_value ("__pic__", flag_pic); | |
516 | builtin_define_with_int_value ("__PIC__", flag_pic); | |
517 | } | |
cb60f38d NB |
518 | |
519 | if (flag_iso) | |
520 | cpp_define (pfile, "__STRICT_ANSI__"); | |
521 | ||
522 | if (!flag_signed_char) | |
523 | cpp_define (pfile, "__CHAR_UNSIGNED__"); | |
524 | ||
8df83eae | 525 | if (c_dialect_cxx () && TYPE_UNSIGNED (wchar_type_node)) |
cb60f38d NB |
526 | cpp_define (pfile, "__WCHAR_UNSIGNED__"); |
527 | ||
528 | /* Make the choice of ObjC runtime visible to source code. */ | |
37fa72e9 | 529 | if (c_dialect_objc () && flag_next_runtime) |
cb60f38d NB |
530 | cpp_define (pfile, "__NEXT_RUNTIME__"); |
531 | ||
84b8b0e0 ZW |
532 | /* Show the availability of some target pragmas. */ |
533 | if (flag_mudflap || targetm.handle_pragma_redefine_extname) | |
534 | cpp_define (pfile, "__PRAGMA_REDEFINE_EXTNAME"); | |
535 | ||
536 | if (targetm.handle_pragma_extern_prefix) | |
537 | cpp_define (pfile, "__PRAGMA_EXTERN_PREFIX"); | |
538 | ||
0ffb94cd JW |
539 | /* Make the choice of the stack protector runtime visible to source code. |
540 | The macro names and values here were chosen for compatibility with an | |
541 | earlier implementation, i.e. ProPolice. */ | |
7d69de61 RH |
542 | if (flag_stack_protect == 2) |
543 | cpp_define (pfile, "__SSP_ALL__=2"); | |
544 | else if (flag_stack_protect == 1) | |
545 | cpp_define (pfile, "__SSP__=1"); | |
546 | ||
953ff289 DN |
547 | if (flag_openmp) |
548 | cpp_define (pfile, "_OPENMP=200505"); | |
549 | ||
cb60f38d NB |
550 | /* A straightforward target hook doesn't work, because of problems |
551 | linking that hook's body when part of non-C front ends. */ | |
552 | # define preprocessing_asm_p() (cpp_get_options (pfile)->lang == CLK_ASM) | |
553 | # define preprocessing_trad_p() (cpp_get_options (pfile)->traditional) | |
554 | # define builtin_define(TXT) cpp_define (pfile, TXT) | |
555 | # define builtin_assert(TXT) cpp_assert (pfile, TXT) | |
556 | TARGET_CPU_CPP_BUILTINS (); | |
557 | TARGET_OS_CPP_BUILTINS (); | |
4e2e315f | 558 | TARGET_OBJFMT_CPP_BUILTINS (); |
63c5b495 MM |
559 | |
560 | /* Support the __declspec keyword by turning them into attributes. | |
561 | Note that the current way we do this may result in a collision | |
562 | with predefined attributes later on. This can be solved by using | |
563 | one attribute, say __declspec__, and passing args to it. The | |
564 | problem with that approach is that args are not accumulated: each | |
565 | new appearance would clobber any existing args. */ | |
566 | if (TARGET_DECLSPEC) | |
567 | builtin_define ("__declspec(x)=__attribute__((x))"); | |
cb60f38d NB |
568 | } |
569 | ||
570 | /* Pass an object-like macro. If it doesn't lie in the user's | |
571 | namespace, defines it unconditionally. Otherwise define a version | |
572 | with two leading underscores, and another version with two leading | |
573 | and trailing underscores, and define the original only if an ISO | |
574 | standard was not nominated. | |
575 | ||
576 | e.g. passing "unix" defines "__unix", "__unix__" and possibly | |
577 | "unix". Passing "_mips" defines "__mips", "__mips__" and possibly | |
578 | "_mips". */ | |
21282b1e | 579 | void |
35b1a6fa | 580 | builtin_define_std (const char *macro) |
cb60f38d NB |
581 | { |
582 | size_t len = strlen (macro); | |
cceb1885 | 583 | char *buff = (char *) alloca (len + 5); |
cb60f38d NB |
584 | char *p = buff + 2; |
585 | char *q = p + len; | |
586 | ||
587 | /* prepend __ (or maybe just _) if in user's namespace. */ | |
588 | memcpy (p, macro, len + 1); | |
589 | if (!( *p == '_' && (p[1] == '_' || ISUPPER (p[1])))) | |
590 | { | |
591 | if (*p != '_') | |
592 | *--p = '_'; | |
593 | if (p[1] != '_') | |
594 | *--p = '_'; | |
595 | } | |
596 | cpp_define (parse_in, p); | |
597 | ||
598 | /* If it was in user's namespace... */ | |
599 | if (p != buff + 2) | |
600 | { | |
601 | /* Define the macro with leading and following __. */ | |
602 | if (q[-1] != '_') | |
603 | *q++ = '_'; | |
604 | if (q[-2] != '_') | |
605 | *q++ = '_'; | |
606 | *q = '\0'; | |
607 | cpp_define (parse_in, p); | |
608 | ||
609 | /* Finally, define the original macro if permitted. */ | |
610 | if (!flag_iso) | |
611 | cpp_define (parse_in, macro); | |
612 | } | |
613 | } | |
614 | ||
615 | /* Pass an object-like macro and a value to define it to. The third | |
616 | parameter says whether or not to turn the value into a string | |
617 | constant. */ | |
618 | void | |
35b1a6fa | 619 | builtin_define_with_value (const char *macro, const char *expansion, int is_str) |
cb60f38d NB |
620 | { |
621 | char *buf; | |
622 | size_t mlen = strlen (macro); | |
623 | size_t elen = strlen (expansion); | |
624 | size_t extra = 2; /* space for an = and a NUL */ | |
625 | ||
626 | if (is_str) | |
627 | extra += 2; /* space for two quote marks */ | |
628 | ||
cceb1885 | 629 | buf = (char *) alloca (mlen + elen + extra); |
cb60f38d NB |
630 | if (is_str) |
631 | sprintf (buf, "%s=\"%s\"", macro, expansion); | |
632 | else | |
633 | sprintf (buf, "%s=%s", macro, expansion); | |
634 | ||
635 | cpp_define (parse_in, buf); | |
636 | } | |
637 | ||
638 | /* Pass an object-like macro and a value to define it to. The third | |
639 | parameter is the length of the expansion. */ | |
640 | static void | |
35b1a6fa | 641 | builtin_define_with_value_n (const char *macro, const char *expansion, size_t elen) |
cb60f38d NB |
642 | { |
643 | char *buf; | |
644 | size_t mlen = strlen (macro); | |
35b1a6fa | 645 | |
cb60f38d | 646 | /* Space for an = and a NUL. */ |
cceb1885 | 647 | buf = (char *) alloca (mlen + elen + 2); |
cb60f38d | 648 | memcpy (buf, macro, mlen); |
6a87d634 | 649 | buf[mlen] = '='; |
cb60f38d NB |
650 | memcpy (buf + mlen + 1, expansion, elen); |
651 | buf[mlen + elen + 1] = '\0'; | |
652 | ||
653 | cpp_define (parse_in, buf); | |
654 | } | |
655 | ||
656 | /* Pass an object-like macro and an integer value to define it to. */ | |
657 | static void | |
35b1a6fa | 658 | builtin_define_with_int_value (const char *macro, HOST_WIDE_INT value) |
cb60f38d NB |
659 | { |
660 | char *buf; | |
661 | size_t mlen = strlen (macro); | |
662 | size_t vlen = 18; | |
663 | size_t extra = 2; /* space for = and NUL. */ | |
664 | ||
cceb1885 | 665 | buf = (char *) alloca (mlen + vlen + extra); |
cb60f38d NB |
666 | memcpy (buf, macro, mlen); |
667 | buf[mlen] = '='; | |
668 | sprintf (buf + mlen + 1, HOST_WIDE_INT_PRINT_DEC, value); | |
669 | ||
670 | cpp_define (parse_in, buf); | |
671 | } | |
672 | ||
673 | /* Pass an object-like macro a hexadecimal floating-point value. */ | |
674 | static void | |
35b1a6fa AJ |
675 | builtin_define_with_hex_fp_value (const char *macro, |
676 | tree type ATTRIBUTE_UNUSED, int digits, | |
264c41ed CD |
677 | const char *hex_str, |
678 | const char *fp_suffix, | |
679 | const char *fp_cast) | |
cb60f38d NB |
680 | { |
681 | REAL_VALUE_TYPE real; | |
264c41ed | 682 | char dec_str[64], buf1[256], buf2[256]; |
cb60f38d NB |
683 | |
684 | /* Hex values are really cool and convenient, except that they're | |
685 | not supported in strict ISO C90 mode. First, the "p-" sequence | |
686 | is not valid as part of a preprocessor number. Second, we get a | |
687 | pedwarn from the preprocessor, which has no context, so we can't | |
688 | suppress the warning with __extension__. | |
689 | ||
35b1a6fa | 690 | So instead what we do is construct the number in hex (because |
cb60f38d NB |
691 | it's easy to get the exact correct value), parse it as a real, |
692 | then print it back out as decimal. */ | |
693 | ||
694 | real_from_string (&real, hex_str); | |
695 | real_to_decimal (dec_str, &real, sizeof (dec_str), digits, 0); | |
696 | ||
264c41ed CD |
697 | /* Assemble the macro in the following fashion |
698 | macro = fp_cast [dec_str fp_suffix] */ | |
699 | sprintf (buf1, "%s%s", dec_str, fp_suffix); | |
700 | sprintf (buf2, fp_cast, buf1); | |
701 | sprintf (buf1, "%s=%s", macro, buf2); | |
702 | ||
703 | cpp_define (parse_in, buf1); | |
cb60f38d NB |
704 | } |
705 | ||
706 | /* Define MAX for TYPE based on the precision of the type. IS_LONG is | |
707 | 1 for type "long" and 2 for "long long". We have to handle | |
708 | unsigned types, since wchar_t might be unsigned. */ | |
709 | ||
710 | static void | |
35b1a6fa | 711 | builtin_define_type_max (const char *macro, tree type, int is_long) |
cb60f38d NB |
712 | { |
713 | static const char *const values[] | |
714 | = { "127", "255", | |
715 | "32767", "65535", | |
716 | "2147483647", "4294967295", | |
717 | "9223372036854775807", "18446744073709551615", | |
718 | "170141183460469231731687303715884105727", | |
719 | "340282366920938463463374607431768211455" }; | |
720 | static const char *const suffixes[] = { "", "U", "L", "UL", "LL", "ULL" }; | |
721 | ||
722 | const char *value, *suffix; | |
723 | char *buf; | |
724 | size_t idx; | |
725 | ||
726 | /* Pre-rendering the values mean we don't have to futz with printing a | |
727 | multi-word decimal value. There are also a very limited number of | |
728 | precisions that we support, so it's really a waste of time. */ | |
729 | switch (TYPE_PRECISION (type)) | |
730 | { | |
731 | case 8: idx = 0; break; | |
732 | case 16: idx = 2; break; | |
733 | case 32: idx = 4; break; | |
734 | case 64: idx = 6; break; | |
735 | case 128: idx = 8; break; | |
366de0ce | 736 | default: gcc_unreachable (); |
cb60f38d NB |
737 | } |
738 | ||
8df83eae RK |
739 | value = values[idx + TYPE_UNSIGNED (type)]; |
740 | suffix = suffixes[is_long * 2 + TYPE_UNSIGNED (type)]; | |
cb60f38d | 741 | |
cceb1885 GDR |
742 | buf = (char *) alloca (strlen (macro) + 1 + strlen (value) |
743 | + strlen (suffix) + 1); | |
cb60f38d NB |
744 | sprintf (buf, "%s=%s%s", macro, value, suffix); |
745 | ||
746 | cpp_define (parse_in, buf); | |
747 | } |