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cb60f38d | 1 | /* Define builtin-in macros for the C family front ends. |
da1c7394 ILT |
2 | Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007 |
3 | Free Software Foundation, Inc. | |
cb60f38d NB |
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 | |
9dcd6f09 | 9 | Software Foundation; either version 3, or (at your option) any later |
cb60f38d NB |
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 | |
9dcd6f09 NC |
18 | along with GCC; see the file COPYING3. If not see |
19 | <http://www.gnu.org/licenses/>. */ | |
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); | |
024a85ae | 61 | static void builtin_define_type_sizeof (const char *, tree); |
264c41ed CD |
62 | static void builtin_define_float_constants (const char *, |
63 | const char *, | |
64 | const char *, | |
35b1a6fa AJ |
65 | tree); |
66 | static void define__GNUC__ (void); | |
cb60f38d NB |
67 | |
68 | /* Define NAME with value TYPE precision. */ | |
69 | static void | |
35b1a6fa | 70 | builtin_define_type_precision (const char *name, tree type) |
cb60f38d NB |
71 | { |
72 | builtin_define_with_int_value (name, TYPE_PRECISION (type)); | |
73 | } | |
74 | ||
024a85ae AK |
75 | /* Define NAME with value TYPE size_unit. */ |
76 | static void | |
77 | builtin_define_type_sizeof (const char *name, tree type) | |
78 | { | |
79 | builtin_define_with_int_value (name, | |
80 | tree_low_cst (TYPE_SIZE_UNIT (type), 1)); | |
81 | } | |
82 | ||
264c41ed CD |
83 | /* Define the float.h constants for TYPE using NAME_PREFIX, FP_SUFFIX, |
84 | and FP_CAST. */ | |
cb60f38d | 85 | static void |
264c41ed CD |
86 | builtin_define_float_constants (const char *name_prefix, |
87 | const char *fp_suffix, | |
88 | const char *fp_cast, | |
89 | tree type) | |
cb60f38d NB |
90 | { |
91 | /* Used to convert radix-based values to base 10 values in several cases. | |
92 | ||
93 | In the max_exp -> max_10_exp conversion for 128-bit IEEE, we need at | |
94 | least 6 significant digits for correct results. Using the fraction | |
95 | formed by (log(2)*1e6)/(log(10)*1e6) overflows a 32-bit integer as an | |
96 | intermediate; perhaps someone can find a better approximation, in the | |
97 | mean time, I suspect using doubles won't harm the bootstrap here. */ | |
98 | ||
99 | const double log10_2 = .30102999566398119521; | |
100 | double log10_b; | |
101 | const struct real_format *fmt; | |
102 | ||
103 | char name[64], buf[128]; | |
104 | int dig, min_10_exp, max_10_exp; | |
105 | int decimal_dig; | |
106 | ||
70a01792 | 107 | fmt = REAL_MODE_FORMAT (TYPE_MODE (type)); |
9a8ce21f | 108 | gcc_assert (fmt->b != 10); |
cb60f38d NB |
109 | |
110 | /* The radix of the exponent representation. */ | |
111 | if (type == float_type_node) | |
112 | builtin_define_with_int_value ("__FLT_RADIX__", fmt->b); | |
4d8a8a0a | 113 | log10_b = log10_2; |
cb60f38d NB |
114 | |
115 | /* The number of radix digits, p, in the floating-point significand. */ | |
116 | sprintf (name, "__%s_MANT_DIG__", name_prefix); | |
117 | builtin_define_with_int_value (name, fmt->p); | |
118 | ||
119 | /* The number of decimal digits, q, such that any floating-point number | |
120 | with q decimal digits can be rounded into a floating-point number with | |
121 | p radix b digits and back again without change to the q decimal digits, | |
122 | ||
123 | p log10 b if b is a power of 10 | |
35b1a6fa | 124 | floor((p - 1) log10 b) otherwise |
cb60f38d NB |
125 | */ |
126 | dig = (fmt->p - 1) * log10_b; | |
127 | sprintf (name, "__%s_DIG__", name_prefix); | |
128 | builtin_define_with_int_value (name, dig); | |
129 | ||
130 | /* The minimum negative int x such that b**(x-1) is a normalized float. */ | |
131 | sprintf (name, "__%s_MIN_EXP__", name_prefix); | |
132 | sprintf (buf, "(%d)", fmt->emin); | |
133 | builtin_define_with_value (name, buf, 0); | |
134 | ||
135 | /* The minimum negative int x such that 10**x is a normalized float, | |
136 | ||
137 | ceil (log10 (b ** (emin - 1))) | |
138 | = ceil (log10 (b) * (emin - 1)) | |
139 | ||
140 | Recall that emin is negative, so the integer truncation calculates | |
141 | the ceiling, not the floor, in this case. */ | |
142 | min_10_exp = (fmt->emin - 1) * log10_b; | |
143 | sprintf (name, "__%s_MIN_10_EXP__", name_prefix); | |
144 | sprintf (buf, "(%d)", min_10_exp); | |
145 | builtin_define_with_value (name, buf, 0); | |
146 | ||
147 | /* The maximum int x such that b**(x-1) is a representable float. */ | |
148 | sprintf (name, "__%s_MAX_EXP__", name_prefix); | |
149 | builtin_define_with_int_value (name, fmt->emax); | |
150 | ||
151 | /* The maximum int x such that 10**x is in the range of representable | |
152 | finite floating-point numbers, | |
153 | ||
154 | floor (log10((1 - b**-p) * b**emax)) | |
155 | = floor (log10(1 - b**-p) + log10(b**emax)) | |
156 | = floor (log10(1 - b**-p) + log10(b)*emax) | |
157 | ||
158 | The safest thing to do here is to just compute this number. But since | |
159 | we don't link cc1 with libm, we cannot. We could implement log10 here | |
160 | a series expansion, but that seems too much effort because: | |
161 | ||
162 | Note that the first term, for all extant p, is a number exceedingly close | |
163 | to zero, but slightly negative. Note that the second term is an integer | |
164 | scaling an irrational number, and that because of the floor we are only | |
165 | interested in its integral portion. | |
166 | ||
167 | In order for the first term to have any effect on the integral portion | |
168 | of the second term, the second term has to be exceedingly close to an | |
169 | integer itself (e.g. 123.000000000001 or something). Getting a result | |
170 | that close to an integer requires that the irrational multiplicand have | |
171 | a long series of zeros in its expansion, which doesn't occur in the | |
172 | first 20 digits or so of log10(b). | |
173 | ||
174 | Hand-waving aside, crunching all of the sets of constants above by hand | |
175 | does not yield a case for which the first term is significant, which | |
176 | in the end is all that matters. */ | |
177 | max_10_exp = fmt->emax * log10_b; | |
178 | sprintf (name, "__%s_MAX_10_EXP__", name_prefix); | |
179 | builtin_define_with_int_value (name, max_10_exp); | |
180 | ||
181 | /* The number of decimal digits, n, such that any floating-point number | |
182 | can be rounded to n decimal digits and back again without change to | |
35b1a6fa | 183 | the value. |
cb60f38d NB |
184 | |
185 | p * log10(b) if b is a power of 10 | |
186 | ceil(1 + p * log10(b)) otherwise | |
187 | ||
188 | The only macro we care about is this number for the widest supported | |
189 | floating type, but we want this value for rendering constants below. */ | |
190 | { | |
191 | double d_decimal_dig = 1 + fmt->p * log10_b; | |
192 | decimal_dig = d_decimal_dig; | |
193 | if (decimal_dig < d_decimal_dig) | |
194 | decimal_dig++; | |
195 | } | |
196 | if (type == long_double_type_node) | |
197 | builtin_define_with_int_value ("__DECIMAL_DIG__", decimal_dig); | |
198 | ||
199 | /* Since, for the supported formats, B is always a power of 2, we | |
200 | construct the following numbers directly as a hexadecimal | |
201 | constants. */ | |
7faa1bbb KG |
202 | get_max_float (fmt, buf, sizeof (buf)); |
203 | ||
cb60f38d | 204 | sprintf (name, "__%s_MAX__", name_prefix); |
264c41ed | 205 | builtin_define_with_hex_fp_value (name, type, decimal_dig, buf, fp_suffix, fp_cast); |
cb60f38d NB |
206 | |
207 | /* The minimum normalized positive floating-point number, | |
208 | b**(emin-1). */ | |
209 | sprintf (name, "__%s_MIN__", name_prefix); | |
4d8a8a0a | 210 | sprintf (buf, "0x1p%d", fmt->emin - 1); |
264c41ed | 211 | builtin_define_with_hex_fp_value (name, type, decimal_dig, buf, fp_suffix, fp_cast); |
cb60f38d NB |
212 | |
213 | /* The difference between 1 and the least value greater than 1 that is | |
214 | representable in the given floating point type, b**(1-p). */ | |
215 | sprintf (name, "__%s_EPSILON__", name_prefix); | |
59d7d767 GK |
216 | if (fmt->pnan < fmt->p) |
217 | /* This is an IBM extended double format, so 1.0 + any double is | |
218 | representable precisely. */ | |
4d8a8a0a | 219 | sprintf (buf, "0x1p%d", fmt->emin - fmt->p); |
c22cacf3 | 220 | else |
4d8a8a0a | 221 | sprintf (buf, "0x1p%d", 1 - fmt->p); |
264c41ed | 222 | builtin_define_with_hex_fp_value (name, type, decimal_dig, buf, fp_suffix, fp_cast); |
cb60f38d NB |
223 | |
224 | /* For C++ std::numeric_limits<T>::denorm_min. The minimum denormalized | |
225 | positive floating-point number, b**(emin-p). Zero for formats that | |
226 | don't support denormals. */ | |
227 | sprintf (name, "__%s_DENORM_MIN__", name_prefix); | |
228 | if (fmt->has_denorm) | |
229 | { | |
4d8a8a0a | 230 | sprintf (buf, "0x1p%d", fmt->emin - fmt->p); |
cb60f38d | 231 | builtin_define_with_hex_fp_value (name, type, decimal_dig, |
264c41ed | 232 | buf, fp_suffix, fp_cast); |
cb60f38d NB |
233 | } |
234 | else | |
235 | { | |
236 | sprintf (buf, "0.0%s", fp_suffix); | |
237 | builtin_define_with_value (name, buf, 0); | |
238 | } | |
239 | ||
264c41ed CD |
240 | sprintf (name, "__%s_HAS_DENORM__", name_prefix); |
241 | builtin_define_with_value (name, fmt->has_denorm ? "1" : "0", 0); | |
242 | ||
cb60f38d NB |
243 | /* For C++ std::numeric_limits<T>::has_infinity. */ |
244 | sprintf (name, "__%s_HAS_INFINITY__", name_prefix); | |
35b1a6fa | 245 | builtin_define_with_int_value (name, |
cb60f38d NB |
246 | MODE_HAS_INFINITIES (TYPE_MODE (type))); |
247 | /* For C++ std::numeric_limits<T>::has_quiet_NaN. We do not have a | |
248 | predicate to distinguish a target that has both quiet and | |
249 | signalling NaNs from a target that has only quiet NaNs or only | |
250 | signalling NaNs, so we assume that a target that has any kind of | |
251 | NaN has quiet NaNs. */ | |
252 | sprintf (name, "__%s_HAS_QUIET_NAN__", name_prefix); | |
253 | builtin_define_with_int_value (name, MODE_HAS_NANS (TYPE_MODE (type))); | |
254 | } | |
255 | ||
9a8ce21f JG |
256 | /* Define __DECx__ constants for TYPE using NAME_PREFIX and SUFFIX. */ |
257 | static void | |
258 | builtin_define_decimal_float_constants (const char *name_prefix, | |
259 | const char *suffix, | |
260 | tree type) | |
261 | { | |
262 | const struct real_format *fmt; | |
263 | char name[64], buf[128], *p; | |
264 | int digits; | |
265 | ||
266 | fmt = REAL_MODE_FORMAT (TYPE_MODE (type)); | |
267 | ||
268 | /* The number of radix digits, p, in the significand. */ | |
269 | sprintf (name, "__%s_MANT_DIG__", name_prefix); | |
270 | builtin_define_with_int_value (name, fmt->p); | |
271 | ||
272 | /* The minimum negative int x such that b**(x-1) is a normalized float. */ | |
273 | sprintf (name, "__%s_MIN_EXP__", name_prefix); | |
274 | sprintf (buf, "(%d)", fmt->emin); | |
275 | builtin_define_with_value (name, buf, 0); | |
276 | ||
277 | /* The maximum int x such that b**(x-1) is a representable float. */ | |
278 | sprintf (name, "__%s_MAX_EXP__", name_prefix); | |
279 | builtin_define_with_int_value (name, fmt->emax); | |
280 | ||
281 | /* Compute the minimum representable value. */ | |
282 | sprintf (name, "__%s_MIN__", name_prefix); | |
283 | sprintf (buf, "1E%d%s", fmt->emin, suffix); | |
284 | builtin_define_with_value (name, buf, 0); | |
285 | ||
286 | /* Compute the maximum representable value. */ | |
287 | sprintf (name, "__%s_MAX__", name_prefix); | |
288 | p = buf; | |
289 | for (digits = fmt->p; digits; digits--) | |
290 | { | |
291 | *p++ = '9'; | |
292 | if (digits == fmt->p) | |
293 | *p++ = '.'; | |
294 | } | |
295 | *p = 0; | |
296 | /* fmt->p plus 1, to account for the decimal point. */ | |
297 | sprintf (&buf[fmt->p + 1], "E%d%s", fmt->emax, suffix); | |
298 | builtin_define_with_value (name, buf, 0); | |
299 | ||
300 | /* Compute epsilon (the difference between 1 and least value greater | |
301 | than 1 representable). */ | |
302 | sprintf (name, "__%s_EPSILON__", name_prefix); | |
303 | sprintf (buf, "1E-%d%s", fmt->p - 1, suffix); | |
304 | builtin_define_with_value (name, buf, 0); | |
305 | ||
306 | /* Minimum denormalized postive decimal value. */ | |
307 | sprintf (name, "__%s_DEN__", name_prefix); | |
308 | p = buf; | |
309 | for (digits = fmt->p; digits > 1; digits--) | |
310 | { | |
311 | *p++ = '0'; | |
312 | if (digits == fmt->p) | |
313 | *p++ = '.'; | |
314 | } | |
315 | *p = 0; | |
316 | sprintf (&buf[fmt->p], "1E%d%s", fmt->emin, suffix); | |
317 | builtin_define_with_value (name, buf, 0); | |
318 | } | |
319 | ||
cb60f38d NB |
320 | /* Define __GNUC__, __GNUC_MINOR__ and __GNUC_PATCHLEVEL__. */ |
321 | static void | |
35b1a6fa | 322 | define__GNUC__ (void) |
cb60f38d NB |
323 | { |
324 | /* The format of the version string, enforced below, is | |
325 | ([^0-9]*-)?[0-9]+[.][0-9]+([.][0-9]+)?([- ].*)? */ | |
326 | const char *q, *v = version_string; | |
327 | ||
3f75a254 | 328 | while (*v && !ISDIGIT (*v)) |
cb60f38d | 329 | v++; |
366de0ce | 330 | gcc_assert (*v && (v <= version_string || v[-1] == '-')); |
cb60f38d NB |
331 | |
332 | q = v; | |
333 | while (ISDIGIT (*v)) | |
334 | v++; | |
335 | builtin_define_with_value_n ("__GNUC__", q, v - q); | |
37fa72e9 | 336 | if (c_dialect_cxx ()) |
cb60f38d NB |
337 | builtin_define_with_value_n ("__GNUG__", q, v - q); |
338 | ||
a101957b | 339 | gcc_assert (*v == '.' && ISDIGIT (v[1])); |
c22cacf3 | 340 | |
cb60f38d NB |
341 | q = ++v; |
342 | while (ISDIGIT (*v)) | |
343 | v++; | |
344 | builtin_define_with_value_n ("__GNUC_MINOR__", q, v - q); | |
345 | ||
346 | if (*v == '.') | |
347 | { | |
366de0ce | 348 | gcc_assert (ISDIGIT (v[1])); |
cb60f38d NB |
349 | q = ++v; |
350 | while (ISDIGIT (*v)) | |
351 | v++; | |
352 | builtin_define_with_value_n ("__GNUC_PATCHLEVEL__", q, v - q); | |
353 | } | |
354 | else | |
355 | builtin_define_with_value_n ("__GNUC_PATCHLEVEL__", "0", 1); | |
356 | ||
366de0ce | 357 | gcc_assert (!*v || *v == ' ' || *v == '-'); |
cb60f38d NB |
358 | } |
359 | ||
85291069 JM |
360 | /* Define macros used by <stdint.h>. Currently only defines limits |
361 | for intmax_t, used by the testsuite. */ | |
362 | static void | |
363 | builtin_define_stdint_macros (void) | |
364 | { | |
365 | int intmax_long; | |
366 | if (intmax_type_node == long_long_integer_type_node) | |
367 | intmax_long = 2; | |
368 | else if (intmax_type_node == long_integer_type_node) | |
369 | intmax_long = 1; | |
370 | else if (intmax_type_node == integer_type_node) | |
371 | intmax_long = 0; | |
372 | else | |
366de0ce | 373 | gcc_unreachable (); |
85291069 JM |
374 | builtin_define_type_max ("__INTMAX_MAX__", intmax_type_node, intmax_long); |
375 | } | |
376 | ||
cb60f38d NB |
377 | /* Hook that registers front end and target-specific built-ins. */ |
378 | void | |
35b1a6fa | 379 | c_cpp_builtins (cpp_reader *pfile) |
cb60f38d NB |
380 | { |
381 | /* -undef turns off target-specific built-ins. */ | |
382 | if (flag_undef) | |
383 | return; | |
384 | ||
385 | define__GNUC__ (); | |
386 | ||
387 | /* For stddef.h. They require macros defined in c-common.c. */ | |
388 | c_stddef_cpp_builtins (); | |
389 | ||
37fa72e9 | 390 | if (c_dialect_cxx ()) |
cb60f38d | 391 | { |
c22cacf3 | 392 | if (flag_weak && SUPPORTS_ONE_ONLY) |
cb60f38d NB |
393 | cpp_define (pfile, "__GXX_WEAK__=1"); |
394 | else | |
395 | cpp_define (pfile, "__GXX_WEAK__=0"); | |
cb60f38d NB |
396 | if (warn_deprecated) |
397 | cpp_define (pfile, "__DEPRECATED"); | |
c1ae8be5 | 398 | if (cxx_dialect == cxx0x) |
c573f4d5 | 399 | cpp_define (pfile, "__GXX_EXPERIMENTAL_CXX0X__"); |
cb60f38d | 400 | } |
6cd77c3f RH |
401 | /* Note that we define this for C as well, so that we know if |
402 | __attribute__((cleanup)) will interface with EH. */ | |
2288bdbb RH |
403 | if (flag_exceptions) |
404 | cpp_define (pfile, "__EXCEPTIONS"); | |
cb60f38d | 405 | |
e0a21ab9 | 406 | /* Represents the C++ ABI version, always defined so it can be used while |
cb60f38d | 407 | preprocessing C and assembler. */ |
57702a80 MM |
408 | if (flag_abi_version == 0) |
409 | /* Use a very large value so that: | |
410 | ||
c22cacf3 | 411 | #if __GXX_ABI_VERSION >= <value for version X> |
57702a80 MM |
412 | |
413 | will work whether the user explicitly says "-fabi-version=x" or | |
414 | "-fabi-version=0". Do not use INT_MAX because that will be | |
415 | different from system to system. */ | |
416 | builtin_define_with_int_value ("__GXX_ABI_VERSION", 999999); | |
417 | else if (flag_abi_version == 1) | |
1f838355 | 418 | /* Due to a historical accident, this version had the value |
57702a80 MM |
419 | "102". */ |
420 | builtin_define_with_int_value ("__GXX_ABI_VERSION", 102); | |
421 | else | |
e0a21ab9 | 422 | /* Newer versions have values 1002, 1003, .... */ |
c22cacf3 | 423 | builtin_define_with_int_value ("__GXX_ABI_VERSION", |
57702a80 | 424 | 1000 + flag_abi_version); |
cb60f38d NB |
425 | |
426 | /* libgcc needs to know this. */ | |
427 | if (USING_SJLJ_EXCEPTIONS) | |
428 | cpp_define (pfile, "__USING_SJLJ_EXCEPTIONS__"); | |
429 | ||
430 | /* limits.h needs to know these. */ | |
431 | builtin_define_type_max ("__SCHAR_MAX__", signed_char_type_node, 0); | |
432 | builtin_define_type_max ("__SHRT_MAX__", short_integer_type_node, 0); | |
433 | builtin_define_type_max ("__INT_MAX__", integer_type_node, 0); | |
434 | builtin_define_type_max ("__LONG_MAX__", long_integer_type_node, 1); | |
435 | builtin_define_type_max ("__LONG_LONG_MAX__", long_long_integer_type_node, 2); | |
436 | builtin_define_type_max ("__WCHAR_MAX__", wchar_type_node, 0); | |
437 | ||
438 | builtin_define_type_precision ("__CHAR_BIT__", char_type_node); | |
439 | ||
85291069 JM |
440 | /* stdint.h (eventually) and the testsuite need to know these. */ |
441 | builtin_define_stdint_macros (); | |
442 | ||
cb60f38d NB |
443 | /* float.h needs to know these. */ |
444 | ||
445 | builtin_define_with_int_value ("__FLT_EVAL_METHOD__", | |
446 | TARGET_FLT_EVAL_METHOD); | |
447 | ||
9a8ce21f JG |
448 | /* And decfloat.h needs this. */ |
449 | builtin_define_with_int_value ("__DEC_EVAL_METHOD__", | |
450 | TARGET_DEC_EVAL_METHOD); | |
451 | ||
264c41ed CD |
452 | builtin_define_float_constants ("FLT", "F", "%s", float_type_node); |
453 | /* Cast the double precision constants when single precision constants are | |
454 | specified. The correct result is computed by the compiler when using | |
455 | macros that include a cast. This has the side-effect of making the value | |
456 | unusable in const expressions. */ | |
457 | if (flag_single_precision_constant) | |
458 | builtin_define_float_constants ("DBL", "L", "((double)%s)", double_type_node); | |
459 | else | |
460 | builtin_define_float_constants ("DBL", "", "%s", double_type_node); | |
461 | builtin_define_float_constants ("LDBL", "L", "%s", long_double_type_node); | |
cb60f38d | 462 | |
9a8ce21f JG |
463 | /* For decfloat.h. */ |
464 | builtin_define_decimal_float_constants ("DEC32", "DF", dfloat32_type_node); | |
465 | builtin_define_decimal_float_constants ("DEC64", "DD", dfloat64_type_node); | |
466 | builtin_define_decimal_float_constants ("DEC128", "DL", dfloat128_type_node); | |
467 | ||
cb60f38d NB |
468 | /* For use in assembly language. */ |
469 | builtin_define_with_value ("__REGISTER_PREFIX__", REGISTER_PREFIX, 0); | |
470 | builtin_define_with_value ("__USER_LABEL_PREFIX__", user_label_prefix, 0); | |
471 | ||
472 | /* Misc. */ | |
473 | builtin_define_with_value ("__VERSION__", version_string, 1); | |
474 | ||
da1c7394 ILT |
475 | if (flag_gnu89_inline) |
476 | cpp_define (pfile, "__GNUC_GNU_INLINE__"); | |
477 | else | |
478 | cpp_define (pfile, "__GNUC_STDC_INLINE__"); | |
479 | ||
00530a21 AJ |
480 | /* Definitions for LP64 model. */ |
481 | if (TYPE_PRECISION (long_integer_type_node) == 64 | |
482 | && POINTER_SIZE == 64 | |
483 | && TYPE_PRECISION (integer_type_node) == 32) | |
484 | { | |
485 | cpp_define (pfile, "_LP64"); | |
486 | cpp_define (pfile, "__LP64__"); | |
487 | } | |
35b1a6fa | 488 | |
cb60f38d NB |
489 | /* Other target-independent built-ins determined by command-line |
490 | options. */ | |
491 | if (optimize_size) | |
492 | cpp_define (pfile, "__OPTIMIZE_SIZE__"); | |
493 | if (optimize) | |
494 | cpp_define (pfile, "__OPTIMIZE__"); | |
495 | ||
cb60f38d NB |
496 | if (fast_math_flags_set_p ()) |
497 | cpp_define (pfile, "__FAST_MATH__"); | |
498 | if (flag_really_no_inline) | |
499 | cpp_define (pfile, "__NO_INLINE__"); | |
500 | if (flag_signaling_nans) | |
501 | cpp_define (pfile, "__SUPPORT_SNAN__"); | |
502 | if (flag_finite_math_only) | |
503 | cpp_define (pfile, "__FINITE_MATH_ONLY__=1"); | |
504 | else | |
505 | cpp_define (pfile, "__FINITE_MATH_ONLY__=0"); | |
3d119f8f KG |
506 | if (flag_pic) |
507 | { | |
508 | builtin_define_with_int_value ("__pic__", flag_pic); | |
509 | builtin_define_with_int_value ("__PIC__", flag_pic); | |
510 | } | |
7c0ffd09 RS |
511 | if (flag_pie) |
512 | { | |
513 | builtin_define_with_int_value ("__pie__", flag_pie); | |
514 | builtin_define_with_int_value ("__PIE__", flag_pie); | |
515 | } | |
cb60f38d NB |
516 | |
517 | if (flag_iso) | |
518 | cpp_define (pfile, "__STRICT_ANSI__"); | |
519 | ||
520 | if (!flag_signed_char) | |
521 | cpp_define (pfile, "__CHAR_UNSIGNED__"); | |
522 | ||
8df83eae | 523 | if (c_dialect_cxx () && TYPE_UNSIGNED (wchar_type_node)) |
cb60f38d NB |
524 | cpp_define (pfile, "__WCHAR_UNSIGNED__"); |
525 | ||
60c4429c PB |
526 | /* Tell source code if the compiler makes sync_compare_and_swap |
527 | builtins available. */ | |
528 | #ifdef HAVE_sync_compare_and_swapqi | |
529 | if (HAVE_sync_compare_and_swapqi) | |
530 | cpp_define (pfile, "__GCC_HAVE_SYNC_COMPARE_AND_SWAP_1"); | |
531 | #endif | |
532 | ||
533 | #ifdef HAVE_sync_compare_and_swaphi | |
534 | if (HAVE_sync_compare_and_swaphi) | |
535 | cpp_define (pfile, "__GCC_HAVE_SYNC_COMPARE_AND_SWAP_2"); | |
536 | #endif | |
537 | ||
538 | #ifdef HAVE_sync_compare_and_swapsi | |
539 | if (HAVE_sync_compare_and_swapsi) | |
540 | cpp_define (pfile, "__GCC_HAVE_SYNC_COMPARE_AND_SWAP_4"); | |
541 | #endif | |
542 | ||
543 | #ifdef HAVE_sync_compare_and_swapdi | |
544 | if (HAVE_sync_compare_and_swapdi) | |
545 | cpp_define (pfile, "__GCC_HAVE_SYNC_COMPARE_AND_SWAP_8"); | |
546 | #endif | |
547 | ||
548 | #ifdef HAVE_sync_compare_and_swapti | |
549 | if (HAVE_sync_compare_and_swapti) | |
550 | cpp_define (pfile, "__GCC_HAVE_SYNC_COMPARE_AND_SWAP_16"); | |
551 | #endif | |
552 | ||
cb60f38d | 553 | /* Make the choice of ObjC runtime visible to source code. */ |
37fa72e9 | 554 | if (c_dialect_objc () && flag_next_runtime) |
cb60f38d NB |
555 | cpp_define (pfile, "__NEXT_RUNTIME__"); |
556 | ||
84b8b0e0 ZW |
557 | /* Show the availability of some target pragmas. */ |
558 | if (flag_mudflap || targetm.handle_pragma_redefine_extname) | |
559 | cpp_define (pfile, "__PRAGMA_REDEFINE_EXTNAME"); | |
560 | ||
561 | if (targetm.handle_pragma_extern_prefix) | |
562 | cpp_define (pfile, "__PRAGMA_EXTERN_PREFIX"); | |
563 | ||
0ffb94cd JW |
564 | /* Make the choice of the stack protector runtime visible to source code. |
565 | The macro names and values here were chosen for compatibility with an | |
566 | earlier implementation, i.e. ProPolice. */ | |
7d69de61 RH |
567 | if (flag_stack_protect == 2) |
568 | cpp_define (pfile, "__SSP_ALL__=2"); | |
569 | else if (flag_stack_protect == 1) | |
570 | cpp_define (pfile, "__SSP__=1"); | |
571 | ||
953ff289 DN |
572 | if (flag_openmp) |
573 | cpp_define (pfile, "_OPENMP=200505"); | |
574 | ||
2f8e3bd7 FXC |
575 | if (lang_fortran) |
576 | cpp_define (pfile, "__GFORTRAN__=1"); | |
577 | ||
024a85ae AK |
578 | builtin_define_type_sizeof ("__SIZEOF_INT__", integer_type_node); |
579 | builtin_define_type_sizeof ("__SIZEOF_LONG__", long_integer_type_node); | |
580 | builtin_define_type_sizeof ("__SIZEOF_LONG_LONG__", | |
581 | long_long_integer_type_node); | |
582 | builtin_define_type_sizeof ("__SIZEOF_SHORT__", short_integer_type_node); | |
583 | builtin_define_type_sizeof ("__SIZEOF_FLOAT__", float_type_node); | |
584 | builtin_define_type_sizeof ("__SIZEOF_DOUBLE__", double_type_node); | |
585 | builtin_define_type_sizeof ("__SIZEOF_LONG_DOUBLE__", long_double_type_node); | |
586 | builtin_define_type_sizeof ("__SIZEOF_SIZE_T__", size_type_node); | |
587 | builtin_define_type_sizeof ("__SIZEOF_WCHAR_T__", wchar_type_node); | |
588 | builtin_define_type_sizeof ("__SIZEOF_WINT_T__", wint_type_node); | |
589 | builtin_define_type_sizeof ("__SIZEOF_PTRDIFF_T__", | |
590 | unsigned_ptrdiff_type_node); | |
591 | /* ptr_type_node can't be used here since ptr_mode is only set when | |
592 | toplev calls backend_init which is not done with -E switch. */ | |
593 | builtin_define_with_int_value ("__SIZEOF_POINTER__", | |
594 | POINTER_SIZE / BITS_PER_UNIT); | |
595 | ||
cb60f38d NB |
596 | /* A straightforward target hook doesn't work, because of problems |
597 | linking that hook's body when part of non-C front ends. */ | |
598 | # define preprocessing_asm_p() (cpp_get_options (pfile)->lang == CLK_ASM) | |
599 | # define preprocessing_trad_p() (cpp_get_options (pfile)->traditional) | |
600 | # define builtin_define(TXT) cpp_define (pfile, TXT) | |
601 | # define builtin_assert(TXT) cpp_assert (pfile, TXT) | |
602 | TARGET_CPU_CPP_BUILTINS (); | |
603 | TARGET_OS_CPP_BUILTINS (); | |
4e2e315f | 604 | TARGET_OBJFMT_CPP_BUILTINS (); |
63c5b495 MM |
605 | |
606 | /* Support the __declspec keyword by turning them into attributes. | |
607 | Note that the current way we do this may result in a collision | |
608 | with predefined attributes later on. This can be solved by using | |
609 | one attribute, say __declspec__, and passing args to it. The | |
610 | problem with that approach is that args are not accumulated: each | |
611 | new appearance would clobber any existing args. */ | |
612 | if (TARGET_DECLSPEC) | |
613 | builtin_define ("__declspec(x)=__attribute__((x))"); | |
79b87c74 | 614 | |
589dd995 JJ |
615 | /* If decimal floating point is supported, tell the user if the |
616 | alternate format (BID) is used instead of the standard (DPD) | |
617 | format. */ | |
618 | if (ENABLE_DECIMAL_FLOAT && ENABLE_DECIMAL_BID_FORMAT) | |
619 | cpp_define (pfile, "__DECIMAL_BID_FORMAT__"); | |
cb60f38d NB |
620 | } |
621 | ||
622 | /* Pass an object-like macro. If it doesn't lie in the user's | |
623 | namespace, defines it unconditionally. Otherwise define a version | |
624 | with two leading underscores, and another version with two leading | |
625 | and trailing underscores, and define the original only if an ISO | |
626 | standard was not nominated. | |
627 | ||
628 | e.g. passing "unix" defines "__unix", "__unix__" and possibly | |
629 | "unix". Passing "_mips" defines "__mips", "__mips__" and possibly | |
630 | "_mips". */ | |
21282b1e | 631 | void |
35b1a6fa | 632 | builtin_define_std (const char *macro) |
cb60f38d NB |
633 | { |
634 | size_t len = strlen (macro); | |
cceb1885 | 635 | char *buff = (char *) alloca (len + 5); |
cb60f38d NB |
636 | char *p = buff + 2; |
637 | char *q = p + len; | |
638 | ||
639 | /* prepend __ (or maybe just _) if in user's namespace. */ | |
640 | memcpy (p, macro, len + 1); | |
641 | if (!( *p == '_' && (p[1] == '_' || ISUPPER (p[1])))) | |
642 | { | |
643 | if (*p != '_') | |
644 | *--p = '_'; | |
645 | if (p[1] != '_') | |
646 | *--p = '_'; | |
647 | } | |
648 | cpp_define (parse_in, p); | |
649 | ||
650 | /* If it was in user's namespace... */ | |
651 | if (p != buff + 2) | |
652 | { | |
653 | /* Define the macro with leading and following __. */ | |
654 | if (q[-1] != '_') | |
655 | *q++ = '_'; | |
656 | if (q[-2] != '_') | |
657 | *q++ = '_'; | |
658 | *q = '\0'; | |
659 | cpp_define (parse_in, p); | |
660 | ||
661 | /* Finally, define the original macro if permitted. */ | |
662 | if (!flag_iso) | |
663 | cpp_define (parse_in, macro); | |
664 | } | |
665 | } | |
666 | ||
667 | /* Pass an object-like macro and a value to define it to. The third | |
668 | parameter says whether or not to turn the value into a string | |
669 | constant. */ | |
670 | void | |
35b1a6fa | 671 | builtin_define_with_value (const char *macro, const char *expansion, int is_str) |
cb60f38d NB |
672 | { |
673 | char *buf; | |
674 | size_t mlen = strlen (macro); | |
675 | size_t elen = strlen (expansion); | |
676 | size_t extra = 2; /* space for an = and a NUL */ | |
677 | ||
678 | if (is_str) | |
679 | extra += 2; /* space for two quote marks */ | |
680 | ||
cceb1885 | 681 | buf = (char *) alloca (mlen + elen + extra); |
cb60f38d NB |
682 | if (is_str) |
683 | sprintf (buf, "%s=\"%s\"", macro, expansion); | |
684 | else | |
685 | sprintf (buf, "%s=%s", macro, expansion); | |
686 | ||
687 | cpp_define (parse_in, buf); | |
688 | } | |
689 | ||
690 | /* Pass an object-like macro and a value to define it to. The third | |
691 | parameter is the length of the expansion. */ | |
692 | static void | |
35b1a6fa | 693 | builtin_define_with_value_n (const char *macro, const char *expansion, size_t elen) |
cb60f38d NB |
694 | { |
695 | char *buf; | |
696 | size_t mlen = strlen (macro); | |
35b1a6fa | 697 | |
cb60f38d | 698 | /* Space for an = and a NUL. */ |
cceb1885 | 699 | buf = (char *) alloca (mlen + elen + 2); |
cb60f38d | 700 | memcpy (buf, macro, mlen); |
6a87d634 | 701 | buf[mlen] = '='; |
cb60f38d NB |
702 | memcpy (buf + mlen + 1, expansion, elen); |
703 | buf[mlen + elen + 1] = '\0'; | |
704 | ||
705 | cpp_define (parse_in, buf); | |
706 | } | |
707 | ||
708 | /* Pass an object-like macro and an integer value to define it to. */ | |
709 | static void | |
35b1a6fa | 710 | builtin_define_with_int_value (const char *macro, HOST_WIDE_INT value) |
cb60f38d NB |
711 | { |
712 | char *buf; | |
713 | size_t mlen = strlen (macro); | |
714 | size_t vlen = 18; | |
715 | size_t extra = 2; /* space for = and NUL. */ | |
716 | ||
cceb1885 | 717 | buf = (char *) alloca (mlen + vlen + extra); |
cb60f38d NB |
718 | memcpy (buf, macro, mlen); |
719 | buf[mlen] = '='; | |
720 | sprintf (buf + mlen + 1, HOST_WIDE_INT_PRINT_DEC, value); | |
721 | ||
722 | cpp_define (parse_in, buf); | |
723 | } | |
724 | ||
725 | /* Pass an object-like macro a hexadecimal floating-point value. */ | |
726 | static void | |
35b1a6fa AJ |
727 | builtin_define_with_hex_fp_value (const char *macro, |
728 | tree type ATTRIBUTE_UNUSED, int digits, | |
264c41ed CD |
729 | const char *hex_str, |
730 | const char *fp_suffix, | |
731 | const char *fp_cast) | |
cb60f38d NB |
732 | { |
733 | REAL_VALUE_TYPE real; | |
264c41ed | 734 | char dec_str[64], buf1[256], buf2[256]; |
cb60f38d NB |
735 | |
736 | /* Hex values are really cool and convenient, except that they're | |
737 | not supported in strict ISO C90 mode. First, the "p-" sequence | |
738 | is not valid as part of a preprocessor number. Second, we get a | |
739 | pedwarn from the preprocessor, which has no context, so we can't | |
740 | suppress the warning with __extension__. | |
741 | ||
35b1a6fa | 742 | So instead what we do is construct the number in hex (because |
cb60f38d NB |
743 | it's easy to get the exact correct value), parse it as a real, |
744 | then print it back out as decimal. */ | |
745 | ||
746 | real_from_string (&real, hex_str); | |
747 | real_to_decimal (dec_str, &real, sizeof (dec_str), digits, 0); | |
748 | ||
264c41ed CD |
749 | /* Assemble the macro in the following fashion |
750 | macro = fp_cast [dec_str fp_suffix] */ | |
751 | sprintf (buf1, "%s%s", dec_str, fp_suffix); | |
752 | sprintf (buf2, fp_cast, buf1); | |
753 | sprintf (buf1, "%s=%s", macro, buf2); | |
754 | ||
755 | cpp_define (parse_in, buf1); | |
cb60f38d NB |
756 | } |
757 | ||
758 | /* Define MAX for TYPE based on the precision of the type. IS_LONG is | |
759 | 1 for type "long" and 2 for "long long". We have to handle | |
760 | unsigned types, since wchar_t might be unsigned. */ | |
761 | ||
762 | static void | |
35b1a6fa | 763 | builtin_define_type_max (const char *macro, tree type, int is_long) |
cb60f38d NB |
764 | { |
765 | static const char *const values[] | |
766 | = { "127", "255", | |
767 | "32767", "65535", | |
768 | "2147483647", "4294967295", | |
769 | "9223372036854775807", "18446744073709551615", | |
770 | "170141183460469231731687303715884105727", | |
771 | "340282366920938463463374607431768211455" }; | |
772 | static const char *const suffixes[] = { "", "U", "L", "UL", "LL", "ULL" }; | |
773 | ||
774 | const char *value, *suffix; | |
775 | char *buf; | |
776 | size_t idx; | |
777 | ||
778 | /* Pre-rendering the values mean we don't have to futz with printing a | |
779 | multi-word decimal value. There are also a very limited number of | |
780 | precisions that we support, so it's really a waste of time. */ | |
781 | switch (TYPE_PRECISION (type)) | |
782 | { | |
783 | case 8: idx = 0; break; | |
784 | case 16: idx = 2; break; | |
785 | case 32: idx = 4; break; | |
786 | case 64: idx = 6; break; | |
787 | case 128: idx = 8; break; | |
366de0ce | 788 | default: gcc_unreachable (); |
cb60f38d NB |
789 | } |
790 | ||
8df83eae RK |
791 | value = values[idx + TYPE_UNSIGNED (type)]; |
792 | suffix = suffixes[is_long * 2 + TYPE_UNSIGNED (type)]; | |
cb60f38d | 793 | |
cceb1885 GDR |
794 | buf = (char *) alloca (strlen (macro) + 1 + strlen (value) |
795 | + strlen (suffix) + 1); | |
cb60f38d NB |
796 | sprintf (buf, "%s=%s%s", macro, value, suffix); |
797 | ||
798 | cpp_define (parse_in, buf); | |
799 | } |