1 /* Define builtin-in macros for the C family front ends.
2 Copyright (C) 2002-2015 Free Software Foundation, Inc.
4 This file is part of GCC.
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 3, or (at your option) any later
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
16 You should have received a copy of the GNU General Public License
17 along with GCC; see the file COPYING3. If not see
18 <http://www.gnu.org/licenses/>. */
22 #include "coretypes.h"
26 #include "stor-layout.h"
27 #include "stringpool.h"
32 #include "output.h" /* For user_label_prefix. */
33 #include "debug.h" /* For dwarf2out_do_cfi_asm. */
34 #include "tm_p.h" /* For TARGET_CPU_CPP_BUILTINS & friends. */
36 #include "common/common-target.h"
37 #include "cpp-id-data.h"
38 #include "cppbuiltin.h"
40 #ifndef TARGET_OS_CPP_BUILTINS
41 # define TARGET_OS_CPP_BUILTINS()
44 #ifndef TARGET_OBJFMT_CPP_BUILTINS
45 # define TARGET_OBJFMT_CPP_BUILTINS()
48 #ifndef REGISTER_PREFIX
49 #define REGISTER_PREFIX ""
52 /* Non-static as some targets don't use it. */
53 static void builtin_define_with_hex_fp_value (const char *, tree
,
57 static void builtin_define_stdint_macros (void);
58 static void builtin_define_constants (const char *, tree
);
59 static void builtin_define_type_max (const char *, tree
);
60 static void builtin_define_type_minmax (const char *, const char *, tree
);
61 static void builtin_define_float_constants (const char *,
67 /* Return true if MODE provides a fast multiply/add (FMA) builtin function.
68 Originally this function used the fma optab, but that doesn't work with
69 -save-temps, so just rely on the HAVE_fma macros for the standard floating
73 mode_has_fma (machine_mode mode
)
104 /* Define NAME with value TYPE size_unit. */
106 builtin_define_type_sizeof (const char *name
, tree type
)
108 builtin_define_with_int_value (name
,
109 tree_to_uhwi (TYPE_SIZE_UNIT (type
)));
112 /* Define the float.h constants for TYPE using NAME_PREFIX, FP_SUFFIX,
115 builtin_define_float_constants (const char *name_prefix
,
116 const char *fp_suffix
,
118 const char *fma_suffix
,
121 /* Used to convert radix-based values to base 10 values in several cases.
123 In the max_exp -> max_10_exp conversion for 128-bit IEEE, we need at
124 least 6 significant digits for correct results. Using the fraction
125 formed by (log(2)*1e6)/(log(10)*1e6) overflows a 32-bit integer as an
126 intermediate; perhaps someone can find a better approximation, in the
127 mean time, I suspect using doubles won't harm the bootstrap here. */
129 const double log10_2
= .30102999566398119521;
131 const struct real_format
*fmt
;
132 const struct real_format
*ldfmt
;
134 char name
[64], buf
[128];
135 int dig
, min_10_exp
, max_10_exp
;
137 int type_decimal_dig
;
139 fmt
= REAL_MODE_FORMAT (TYPE_MODE (type
));
140 gcc_assert (fmt
->b
!= 10);
141 ldfmt
= REAL_MODE_FORMAT (TYPE_MODE (long_double_type_node
));
142 gcc_assert (ldfmt
->b
!= 10);
144 /* The radix of the exponent representation. */
145 if (type
== float_type_node
)
146 builtin_define_with_int_value ("__FLT_RADIX__", fmt
->b
);
149 /* The number of radix digits, p, in the floating-point significand. */
150 sprintf (name
, "__%s_MANT_DIG__", name_prefix
);
151 builtin_define_with_int_value (name
, fmt
->p
);
153 /* The number of decimal digits, q, such that any floating-point number
154 with q decimal digits can be rounded into a floating-point number with
155 p radix b digits and back again without change to the q decimal digits,
157 p log10 b if b is a power of 10
158 floor((p - 1) log10 b) otherwise
160 dig
= (fmt
->p
- 1) * log10_b
;
161 sprintf (name
, "__%s_DIG__", name_prefix
);
162 builtin_define_with_int_value (name
, dig
);
164 /* The minimum negative int x such that b**(x-1) is a normalized float. */
165 sprintf (name
, "__%s_MIN_EXP__", name_prefix
);
166 sprintf (buf
, "(%d)", fmt
->emin
);
167 builtin_define_with_value (name
, buf
, 0);
169 /* The minimum negative int x such that 10**x is a normalized float,
171 ceil (log10 (b ** (emin - 1)))
172 = ceil (log10 (b) * (emin - 1))
174 Recall that emin is negative, so the integer truncation calculates
175 the ceiling, not the floor, in this case. */
176 min_10_exp
= (fmt
->emin
- 1) * log10_b
;
177 sprintf (name
, "__%s_MIN_10_EXP__", name_prefix
);
178 sprintf (buf
, "(%d)", min_10_exp
);
179 builtin_define_with_value (name
, buf
, 0);
181 /* The maximum int x such that b**(x-1) is a representable float. */
182 sprintf (name
, "__%s_MAX_EXP__", name_prefix
);
183 builtin_define_with_int_value (name
, fmt
->emax
);
185 /* The maximum int x such that 10**x is in the range of representable
186 finite floating-point numbers,
188 floor (log10((1 - b**-p) * b**emax))
189 = floor (log10(1 - b**-p) + log10(b**emax))
190 = floor (log10(1 - b**-p) + log10(b)*emax)
192 The safest thing to do here is to just compute this number. But since
193 we don't link cc1 with libm, we cannot. We could implement log10 here
194 a series expansion, but that seems too much effort because:
196 Note that the first term, for all extant p, is a number exceedingly close
197 to zero, but slightly negative. Note that the second term is an integer
198 scaling an irrational number, and that because of the floor we are only
199 interested in its integral portion.
201 In order for the first term to have any effect on the integral portion
202 of the second term, the second term has to be exceedingly close to an
203 integer itself (e.g. 123.000000000001 or something). Getting a result
204 that close to an integer requires that the irrational multiplicand have
205 a long series of zeros in its expansion, which doesn't occur in the
206 first 20 digits or so of log10(b).
208 Hand-waving aside, crunching all of the sets of constants above by hand
209 does not yield a case for which the first term is significant, which
210 in the end is all that matters. */
211 max_10_exp
= fmt
->emax
* log10_b
;
212 sprintf (name
, "__%s_MAX_10_EXP__", name_prefix
);
213 builtin_define_with_int_value (name
, max_10_exp
);
215 /* The number of decimal digits, n, such that any floating-point number
216 can be rounded to n decimal digits and back again without change to
219 p * log10(b) if b is a power of 10
220 ceil(1 + p * log10(b)) otherwise
222 The only macro we care about is this number for the widest supported
223 floating type, but we want this value for rendering constants below. */
226 = 1 + (fmt
->p
< ldfmt
->p
? ldfmt
->p
: fmt
->p
) * log10_b
;
227 decimal_dig
= d_decimal_dig
;
228 if (decimal_dig
< d_decimal_dig
)
231 /* Similar, for this type rather than long double. */
233 double type_d_decimal_dig
= 1 + fmt
->p
* log10_b
;
234 type_decimal_dig
= type_d_decimal_dig
;
235 if (type_decimal_dig
< type_d_decimal_dig
)
238 if (type
== long_double_type_node
)
239 builtin_define_with_int_value ("__DECIMAL_DIG__", decimal_dig
);
242 sprintf (name
, "__%s_DECIMAL_DIG__", name_prefix
);
243 builtin_define_with_int_value (name
, type_decimal_dig
);
246 /* Since, for the supported formats, B is always a power of 2, we
247 construct the following numbers directly as a hexadecimal
249 get_max_float (fmt
, buf
, sizeof (buf
));
251 sprintf (name
, "__%s_MAX__", name_prefix
);
252 builtin_define_with_hex_fp_value (name
, type
, decimal_dig
, buf
, fp_suffix
, fp_cast
);
254 /* The minimum normalized positive floating-point number,
256 sprintf (name
, "__%s_MIN__", name_prefix
);
257 sprintf (buf
, "0x1p%d", fmt
->emin
- 1);
258 builtin_define_with_hex_fp_value (name
, type
, decimal_dig
, buf
, fp_suffix
, fp_cast
);
260 /* The difference between 1 and the least value greater than 1 that is
261 representable in the given floating point type, b**(1-p). */
262 sprintf (name
, "__%s_EPSILON__", name_prefix
);
263 if (fmt
->pnan
< fmt
->p
)
264 /* This is an IBM extended double format, so 1.0 + any double is
265 representable precisely. */
266 sprintf (buf
, "0x1p%d", fmt
->emin
- fmt
->p
);
268 sprintf (buf
, "0x1p%d", 1 - fmt
->p
);
269 builtin_define_with_hex_fp_value (name
, type
, decimal_dig
, buf
, fp_suffix
, fp_cast
);
271 /* For C++ std::numeric_limits<T>::denorm_min and C11 *_TRUE_MIN.
272 The minimum denormalized positive floating-point number, b**(emin-p).
273 The minimum normalized positive floating-point number for formats
274 that don't support denormals. */
275 sprintf (name
, "__%s_DENORM_MIN__", name_prefix
);
276 sprintf (buf
, "0x1p%d", fmt
->emin
- (fmt
->has_denorm
? fmt
->p
: 1));
277 builtin_define_with_hex_fp_value (name
, type
, decimal_dig
,
278 buf
, fp_suffix
, fp_cast
);
280 sprintf (name
, "__%s_HAS_DENORM__", name_prefix
);
281 builtin_define_with_value (name
, fmt
->has_denorm
? "1" : "0", 0);
283 /* For C++ std::numeric_limits<T>::has_infinity. */
284 sprintf (name
, "__%s_HAS_INFINITY__", name_prefix
);
285 builtin_define_with_int_value (name
,
286 MODE_HAS_INFINITIES (TYPE_MODE (type
)));
287 /* For C++ std::numeric_limits<T>::has_quiet_NaN. We do not have a
288 predicate to distinguish a target that has both quiet and
289 signalling NaNs from a target that has only quiet NaNs or only
290 signalling NaNs, so we assume that a target that has any kind of
291 NaN has quiet NaNs. */
292 sprintf (name
, "__%s_HAS_QUIET_NAN__", name_prefix
);
293 builtin_define_with_int_value (name
, MODE_HAS_NANS (TYPE_MODE (type
)));
295 /* Note whether we have fast FMA. */
296 if (mode_has_fma (TYPE_MODE (type
)))
298 sprintf (name
, "__FP_FAST_FMA%s", fma_suffix
);
299 builtin_define_with_int_value (name
, 1);
303 /* Define __DECx__ constants for TYPE using NAME_PREFIX and SUFFIX. */
305 builtin_define_decimal_float_constants (const char *name_prefix
,
309 const struct real_format
*fmt
;
310 char name
[64], buf
[128], *p
;
313 fmt
= REAL_MODE_FORMAT (TYPE_MODE (type
));
315 /* The number of radix digits, p, in the significand. */
316 sprintf (name
, "__%s_MANT_DIG__", name_prefix
);
317 builtin_define_with_int_value (name
, fmt
->p
);
319 /* The minimum negative int x such that b**(x-1) is a normalized float. */
320 sprintf (name
, "__%s_MIN_EXP__", name_prefix
);
321 sprintf (buf
, "(%d)", fmt
->emin
);
322 builtin_define_with_value (name
, buf
, 0);
324 /* The maximum int x such that b**(x-1) is a representable float. */
325 sprintf (name
, "__%s_MAX_EXP__", name_prefix
);
326 builtin_define_with_int_value (name
, fmt
->emax
);
328 /* Compute the minimum representable value. */
329 sprintf (name
, "__%s_MIN__", name_prefix
);
330 sprintf (buf
, "1E%d%s", fmt
->emin
- 1, suffix
);
331 builtin_define_with_value (name
, buf
, 0);
333 /* Compute the maximum representable value. */
334 sprintf (name
, "__%s_MAX__", name_prefix
);
336 for (digits
= fmt
->p
; digits
; digits
--)
339 if (digits
== fmt
->p
)
343 /* fmt->p plus 1, to account for the decimal point and fmt->emax
344 minus 1 because the digits are nines, not 1.0. */
345 sprintf (&buf
[fmt
->p
+ 1], "E%d%s", fmt
->emax
- 1, suffix
);
346 builtin_define_with_value (name
, buf
, 0);
348 /* Compute epsilon (the difference between 1 and least value greater
349 than 1 representable). */
350 sprintf (name
, "__%s_EPSILON__", name_prefix
);
351 sprintf (buf
, "1E-%d%s", fmt
->p
- 1, suffix
);
352 builtin_define_with_value (name
, buf
, 0);
354 /* Minimum subnormal positive decimal value. */
355 sprintf (name
, "__%s_SUBNORMAL_MIN__", name_prefix
);
357 for (digits
= fmt
->p
; digits
> 1; digits
--)
360 if (digits
== fmt
->p
)
364 sprintf (&buf
[fmt
->p
], "1E%d%s", fmt
->emin
- 1, suffix
);
365 builtin_define_with_value (name
, buf
, 0);
368 /* Define fixed-point constants for TYPE using NAME_PREFIX and SUFFIX. */
371 builtin_define_fixed_point_constants (const char *name_prefix
,
375 char name
[64], buf
[256], *new_buf
;
378 sprintf (name
, "__%s_FBIT__", name_prefix
);
379 builtin_define_with_int_value (name
, TYPE_FBIT (type
));
381 sprintf (name
, "__%s_IBIT__", name_prefix
);
382 builtin_define_with_int_value (name
, TYPE_IBIT (type
));
384 /* If there is no suffix, defines are for fixed-point modes.
386 if (strcmp (suffix
, "") == 0)
389 if (TYPE_UNSIGNED (type
))
391 sprintf (name
, "__%s_MIN__", name_prefix
);
392 sprintf (buf
, "0.0%s", suffix
);
393 builtin_define_with_value (name
, buf
, 0);
397 sprintf (name
, "__%s_MIN__", name_prefix
);
398 if (ALL_ACCUM_MODE_P (TYPE_MODE (type
)))
399 sprintf (buf
, "(-0X1P%d%s-0X1P%d%s)", TYPE_IBIT (type
) - 1, suffix
,
400 TYPE_IBIT (type
) - 1, suffix
);
402 sprintf (buf
, "(-0.5%s-0.5%s)", suffix
, suffix
);
403 builtin_define_with_value (name
, buf
, 0);
406 sprintf (name
, "__%s_MAX__", name_prefix
);
409 mod
= (TYPE_FBIT (type
) + TYPE_IBIT (type
)) % 4;
411 sprintf (new_buf
++, "%x", (1 << mod
) - 1);
412 for (i
= 0; i
< (TYPE_FBIT (type
) + TYPE_IBIT (type
)) / 4; i
++)
413 sprintf (new_buf
++, "F");
414 sprintf (new_buf
, "P-%d%s", TYPE_FBIT (type
), suffix
);
415 builtin_define_with_value (name
, buf
, 0);
417 sprintf (name
, "__%s_EPSILON__", name_prefix
);
418 sprintf (buf
, "0x1P-%d%s", TYPE_FBIT (type
), suffix
);
419 builtin_define_with_value (name
, buf
, 0);
422 /* Define macros used by <stdint.h>. */
424 builtin_define_stdint_macros (void)
426 builtin_define_type_max ("__INTMAX_MAX__", intmax_type_node
);
427 builtin_define_constants ("__INTMAX_C", intmax_type_node
);
428 builtin_define_type_max ("__UINTMAX_MAX__", uintmax_type_node
);
429 builtin_define_constants ("__UINTMAX_C", uintmax_type_node
);
430 if (sig_atomic_type_node
)
431 builtin_define_type_minmax ("__SIG_ATOMIC_MIN__", "__SIG_ATOMIC_MAX__",
432 sig_atomic_type_node
);
434 builtin_define_type_max ("__INT8_MAX__", int8_type_node
);
436 builtin_define_type_max ("__INT16_MAX__", int16_type_node
);
438 builtin_define_type_max ("__INT32_MAX__", int32_type_node
);
440 builtin_define_type_max ("__INT64_MAX__", int64_type_node
);
442 builtin_define_type_max ("__UINT8_MAX__", uint8_type_node
);
443 if (c_uint16_type_node
)
444 builtin_define_type_max ("__UINT16_MAX__", c_uint16_type_node
);
445 if (c_uint32_type_node
)
446 builtin_define_type_max ("__UINT32_MAX__", c_uint32_type_node
);
447 if (c_uint64_type_node
)
448 builtin_define_type_max ("__UINT64_MAX__", c_uint64_type_node
);
449 if (int_least8_type_node
)
451 builtin_define_type_max ("__INT_LEAST8_MAX__", int_least8_type_node
);
452 builtin_define_constants ("__INT8_C", int_least8_type_node
);
454 if (int_least16_type_node
)
456 builtin_define_type_max ("__INT_LEAST16_MAX__", int_least16_type_node
);
457 builtin_define_constants ("__INT16_C", int_least16_type_node
);
459 if (int_least32_type_node
)
461 builtin_define_type_max ("__INT_LEAST32_MAX__", int_least32_type_node
);
462 builtin_define_constants ("__INT32_C", int_least32_type_node
);
464 if (int_least64_type_node
)
466 builtin_define_type_max ("__INT_LEAST64_MAX__", int_least64_type_node
);
467 builtin_define_constants ("__INT64_C", int_least64_type_node
);
469 if (uint_least8_type_node
)
471 builtin_define_type_max ("__UINT_LEAST8_MAX__", uint_least8_type_node
);
472 builtin_define_constants ("__UINT8_C", uint_least8_type_node
);
474 if (uint_least16_type_node
)
476 builtin_define_type_max ("__UINT_LEAST16_MAX__", uint_least16_type_node
);
477 builtin_define_constants ("__UINT16_C", uint_least16_type_node
);
479 if (uint_least32_type_node
)
481 builtin_define_type_max ("__UINT_LEAST32_MAX__", uint_least32_type_node
);
482 builtin_define_constants ("__UINT32_C", uint_least32_type_node
);
484 if (uint_least64_type_node
)
486 builtin_define_type_max ("__UINT_LEAST64_MAX__", uint_least64_type_node
);
487 builtin_define_constants ("__UINT64_C", uint_least64_type_node
);
489 if (int_fast8_type_node
)
490 builtin_define_type_max ("__INT_FAST8_MAX__", int_fast8_type_node
);
491 if (int_fast16_type_node
)
492 builtin_define_type_max ("__INT_FAST16_MAX__", int_fast16_type_node
);
493 if (int_fast32_type_node
)
494 builtin_define_type_max ("__INT_FAST32_MAX__", int_fast32_type_node
);
495 if (int_fast64_type_node
)
496 builtin_define_type_max ("__INT_FAST64_MAX__", int_fast64_type_node
);
497 if (uint_fast8_type_node
)
498 builtin_define_type_max ("__UINT_FAST8_MAX__", uint_fast8_type_node
);
499 if (uint_fast16_type_node
)
500 builtin_define_type_max ("__UINT_FAST16_MAX__", uint_fast16_type_node
);
501 if (uint_fast32_type_node
)
502 builtin_define_type_max ("__UINT_FAST32_MAX__", uint_fast32_type_node
);
503 if (uint_fast64_type_node
)
504 builtin_define_type_max ("__UINT_FAST64_MAX__", uint_fast64_type_node
);
505 if (intptr_type_node
)
506 builtin_define_type_max ("__INTPTR_MAX__", intptr_type_node
);
507 if (uintptr_type_node
)
508 builtin_define_type_max ("__UINTPTR_MAX__", uintptr_type_node
);
511 /* Adjust the optimization macros when a #pragma GCC optimization is done to
512 reflect the current level. */
514 c_cpp_builtins_optimize_pragma (cpp_reader
*pfile
, tree prev_tree
,
517 struct cl_optimization
*prev
= TREE_OPTIMIZATION (prev_tree
);
518 struct cl_optimization
*cur
= TREE_OPTIMIZATION (cur_tree
);
522 /* -undef turns off target-specific built-ins. */
526 /* Other target-independent built-ins determined by command-line
528 if (!prev
->x_optimize_size
&& cur
->x_optimize_size
)
529 cpp_define (pfile
, "__OPTIMIZE_SIZE__");
530 else if (prev
->x_optimize_size
&& !cur
->x_optimize_size
)
531 cpp_undef (pfile
, "__OPTIMIZE_SIZE__");
533 if (!prev
->x_optimize
&& cur
->x_optimize
)
534 cpp_define (pfile
, "__OPTIMIZE__");
535 else if (prev
->x_optimize
&& !cur
->x_optimize
)
536 cpp_undef (pfile
, "__OPTIMIZE__");
538 prev_fast_math
= fast_math_flags_struct_set_p (prev
);
539 cur_fast_math
= fast_math_flags_struct_set_p (cur
);
540 if (!prev_fast_math
&& cur_fast_math
)
541 cpp_define (pfile
, "__FAST_MATH__");
542 else if (prev_fast_math
&& !cur_fast_math
)
543 cpp_undef (pfile
, "__FAST_MATH__");
545 if (!prev
->x_flag_signaling_nans
&& cur
->x_flag_signaling_nans
)
546 cpp_define (pfile
, "__SUPPORT_SNAN__");
547 else if (prev
->x_flag_signaling_nans
&& !cur
->x_flag_signaling_nans
)
548 cpp_undef (pfile
, "__SUPPORT_SNAN__");
550 if (!prev
->x_flag_errno_math
&& cur
->x_flag_errno_math
)
551 cpp_undef (pfile
, "__NO_MATH_ERRNO__");
552 else if (prev
->x_flag_errno_math
&& !cur
->x_flag_errno_math
)
553 cpp_define (pfile
, "__NO_MATH_ERRNO__");
555 if (!prev
->x_flag_finite_math_only
&& cur
->x_flag_finite_math_only
)
557 cpp_undef (pfile
, "__FINITE_MATH_ONLY__");
558 cpp_define (pfile
, "__FINITE_MATH_ONLY__=1");
560 else if (prev
->x_flag_finite_math_only
&& !cur
->x_flag_finite_math_only
)
562 cpp_undef (pfile
, "__FINITE_MATH_ONLY__");
563 cpp_define (pfile
, "__FINITE_MATH_ONLY__=0");
568 /* This function will emit cpp macros to indicate the presence of various lock
569 free atomic operations. */
572 cpp_atomic_builtins (cpp_reader
*pfile
)
574 /* Set a flag for each size of object that compare and swap exists for up to
576 #define SWAP_LIMIT 17
577 bool have_swap
[SWAP_LIMIT
];
580 /* Clear the map of sizes compare_and swap exists for. */
581 memset (have_swap
, 0, sizeof (have_swap
));
583 /* Tell source code if the compiler makes sync_compare_and_swap
584 builtins available. */
585 #ifndef HAVE_sync_compare_and_swapqi
586 #define HAVE_sync_compare_and_swapqi 0
588 #ifndef HAVE_atomic_compare_and_swapqi
589 #define HAVE_atomic_compare_and_swapqi 0
592 if (HAVE_sync_compare_and_swapqi
|| HAVE_atomic_compare_and_swapqi
)
594 cpp_define (pfile
, "__GCC_HAVE_SYNC_COMPARE_AND_SWAP_1");
598 #ifndef HAVE_sync_compare_and_swaphi
599 #define HAVE_sync_compare_and_swaphi 0
601 #ifndef HAVE_atomic_compare_and_swaphi
602 #define HAVE_atomic_compare_and_swaphi 0
604 if (HAVE_sync_compare_and_swaphi
|| HAVE_atomic_compare_and_swaphi
)
606 cpp_define (pfile
, "__GCC_HAVE_SYNC_COMPARE_AND_SWAP_2");
610 #ifndef HAVE_sync_compare_and_swapsi
611 #define HAVE_sync_compare_and_swapsi 0
613 #ifndef HAVE_atomic_compare_and_swapsi
614 #define HAVE_atomic_compare_and_swapsi 0
616 if (HAVE_sync_compare_and_swapsi
|| HAVE_atomic_compare_and_swapsi
)
618 cpp_define (pfile
, "__GCC_HAVE_SYNC_COMPARE_AND_SWAP_4");
622 #ifndef HAVE_sync_compare_and_swapdi
623 #define HAVE_sync_compare_and_swapdi 0
625 #ifndef HAVE_atomic_compare_and_swapdi
626 #define HAVE_atomic_compare_and_swapdi 0
628 if (HAVE_sync_compare_and_swapdi
|| HAVE_atomic_compare_and_swapdi
)
630 cpp_define (pfile
, "__GCC_HAVE_SYNC_COMPARE_AND_SWAP_8");
634 #ifndef HAVE_sync_compare_and_swapti
635 #define HAVE_sync_compare_and_swapti 0
637 #ifndef HAVE_atomic_compare_and_swapti
638 #define HAVE_atomic_compare_and_swapti 0
640 if (HAVE_sync_compare_and_swapti
|| HAVE_atomic_compare_and_swapti
)
642 cpp_define (pfile
, "__GCC_HAVE_SYNC_COMPARE_AND_SWAP_16");
643 have_swap
[16] = true;
646 /* Tell the source code about various types. These map to the C++11 and C11
647 macros where 2 indicates lock-free always, and 1 indicates sometimes
649 #define SIZEOF_NODE(T) (tree_to_uhwi (TYPE_SIZE_UNIT (T)))
650 #define SWAP_INDEX(T) ((SIZEOF_NODE (T) < SWAP_LIMIT) ? SIZEOF_NODE (T) : 0)
651 builtin_define_with_int_value ("__GCC_ATOMIC_BOOL_LOCK_FREE",
652 (have_swap
[SWAP_INDEX (boolean_type_node
)]? 2 : 1));
653 builtin_define_with_int_value ("__GCC_ATOMIC_CHAR_LOCK_FREE",
654 (have_swap
[SWAP_INDEX (signed_char_type_node
)]? 2 : 1));
655 builtin_define_with_int_value ("__GCC_ATOMIC_CHAR16_T_LOCK_FREE",
656 (have_swap
[SWAP_INDEX (char16_type_node
)]? 2 : 1));
657 builtin_define_with_int_value ("__GCC_ATOMIC_CHAR32_T_LOCK_FREE",
658 (have_swap
[SWAP_INDEX (char32_type_node
)]? 2 : 1));
659 builtin_define_with_int_value ("__GCC_ATOMIC_WCHAR_T_LOCK_FREE",
660 (have_swap
[SWAP_INDEX (wchar_type_node
)]? 2 : 1));
661 builtin_define_with_int_value ("__GCC_ATOMIC_SHORT_LOCK_FREE",
662 (have_swap
[SWAP_INDEX (short_integer_type_node
)]? 2 : 1));
663 builtin_define_with_int_value ("__GCC_ATOMIC_INT_LOCK_FREE",
664 (have_swap
[SWAP_INDEX (integer_type_node
)]? 2 : 1));
665 builtin_define_with_int_value ("__GCC_ATOMIC_LONG_LOCK_FREE",
666 (have_swap
[SWAP_INDEX (long_integer_type_node
)]? 2 : 1));
667 builtin_define_with_int_value ("__GCC_ATOMIC_LLONG_LOCK_FREE",
668 (have_swap
[SWAP_INDEX (long_long_integer_type_node
)]? 2 : 1));
670 /* If we're dealing with a "set" value that doesn't exactly correspond
671 to a boolean truth value, let the library work around that. */
672 builtin_define_with_int_value ("__GCC_ATOMIC_TEST_AND_SET_TRUEVAL",
673 targetm
.atomic_test_and_set_trueval
);
675 /* ptr_type_node can't be used here since ptr_mode is only set when
676 toplev calls backend_init which is not done with -E or pch. */
677 psize
= POINTER_SIZE_UNITS
;
678 if (psize
>= SWAP_LIMIT
)
680 builtin_define_with_int_value ("__GCC_ATOMIC_POINTER_LOCK_FREE",
681 (have_swap
[psize
]? 2 : 1));
684 /* Return the value for __GCC_IEC_559. */
686 cpp_iec_559_value (void)
688 /* The default is support for IEEE 754-2008. */
691 /* float and double must be binary32 and binary64. If they are but
692 with reversed NaN convention, at most IEEE 754-1985 is
694 const struct real_format
*ffmt
695 = REAL_MODE_FORMAT (TYPE_MODE (float_type_node
));
696 const struct real_format
*dfmt
697 = REAL_MODE_FORMAT (TYPE_MODE (double_type_node
));
698 if (!ffmt
->qnan_msb_set
|| !dfmt
->qnan_msb_set
)
703 || ffmt
->emin
!= -125
705 || ffmt
->signbit_rw
!= 31
706 || ffmt
->round_towards_zero
707 || !ffmt
->has_sign_dependent_rounding
711 || !ffmt
->has_signed_zero
715 || dfmt
->emin
!= -1021
716 || dfmt
->emax
!= 1024
717 || dfmt
->signbit_rw
!= 63
718 || dfmt
->round_towards_zero
719 || !dfmt
->has_sign_dependent_rounding
723 || !dfmt
->has_signed_zero
)
726 /* In strict C standards conformance mode, consider unpredictable
727 excess precision to mean lack of IEEE 754 support. The same
728 applies to unpredictable contraction. For C++, and outside
729 strict conformance mode, do not consider these options to mean
730 lack of IEEE 754 support. */
733 && TARGET_FLT_EVAL_METHOD
!= 0
734 && flag_excess_precision_cmdline
!= EXCESS_PRECISION_STANDARD
)
738 && flag_fp_contract_mode
== FP_CONTRACT_FAST
)
741 /* Various options are contrary to IEEE 754 semantics. */
742 if (flag_unsafe_math_optimizations
743 || flag_associative_math
744 || flag_reciprocal_math
745 || flag_finite_math_only
746 || !flag_signed_zeros
747 || flag_single_precision_constant
)
750 /* If the target does not support IEEE 754 exceptions and rounding
751 modes, consider IEEE 754 support to be absent. */
752 if (!targetm
.float_exceptions_rounding_supported_p ())
758 /* Return the value for __GCC_IEC_559_COMPLEX. */
760 cpp_iec_559_complex_value (void)
762 /* The value is no bigger than that of __GCC_IEC_559. */
763 int ret
= cpp_iec_559_value ();
765 /* Some options are contrary to the required default state of the
766 CX_LIMITED_RANGE pragma. */
767 if (flag_complex_method
!= 2)
773 /* Hook that registers front end and target-specific built-ins. */
775 c_cpp_builtins (cpp_reader
*pfile
)
779 /* -undef turns off target-specific built-ins. */
783 define_language_independent_builtin_macros (pfile
);
785 if (c_dialect_cxx ())
788 parse_basever (&major
, NULL
, NULL
);
789 cpp_define_formatted (pfile
, "__GNUG__=%d", major
);
792 /* For stddef.h. They require macros defined in c-common.c. */
793 c_stddef_cpp_builtins ();
795 /* Set include test macros for all C/C++ (not for just C++11 etc.)
796 The builtins __has_include__ and __has_include_next__ are defined
798 cpp_define (pfile
, "__has_include(STR)=__has_include__(STR)");
799 cpp_define (pfile
, "__has_include_next(STR)=__has_include_next__(STR)");
801 if (c_dialect_cxx ())
803 if (flag_weak
&& SUPPORTS_ONE_ONLY
)
804 cpp_define (pfile
, "__GXX_WEAK__=1");
806 cpp_define (pfile
, "__GXX_WEAK__=0");
809 cpp_define (pfile
, "__DEPRECATED");
813 cpp_define (pfile
, "__GXX_RTTI");
814 cpp_define (pfile
, "__cpp_rtti=199711");
817 if (cxx_dialect
>= cxx11
)
818 cpp_define (pfile
, "__GXX_EXPERIMENTAL_CXX0X__");
820 /* Binary literals have been allowed in g++ before C++11
821 and were standardized for C++14. */
822 if (!pedantic
|| cxx_dialect
> cxx11
)
823 cpp_define (pfile
, "__cpp_binary_literals=201304");
825 /* Arrays of runtime bound were removed from C++14, but we still
826 support GNU VLAs. Let's define this macro to a low number
827 (corresponding to the initial test release of GNU C++) if we won't
828 complain about use of VLAs. */
830 && (pedantic
? warn_vla
== 0 : warn_vla
<= 0))
831 cpp_define (pfile
, "__cpp_runtime_arrays=198712");
833 if (cxx_dialect
>= cxx11
)
835 /* Set feature test macros for C++11 */
836 cpp_define (pfile
, "__cpp_unicode_characters=200704");
837 cpp_define (pfile
, "__cpp_raw_strings=200710");
838 cpp_define (pfile
, "__cpp_unicode_literals=200710");
839 cpp_define (pfile
, "__cpp_user_defined_literals=200809");
840 cpp_define (pfile
, "__cpp_lambdas=200907");
841 if (cxx_dialect
== cxx11
)
842 cpp_define (pfile
, "__cpp_constexpr=200704");
843 cpp_define (pfile
, "__cpp_range_based_for=200907");
844 cpp_define (pfile
, "__cpp_static_assert=200410");
845 cpp_define (pfile
, "__cpp_decltype=200707");
846 cpp_define (pfile
, "__cpp_attributes=200809");
847 cpp_define (pfile
, "__cpp_rvalue_reference=200610");
848 cpp_define (pfile
, "__cpp_variadic_templates=200704");
849 cpp_define (pfile
, "__cpp_initializer_lists=200806");
850 cpp_define (pfile
, "__cpp_delegating_constructors=200604");
851 cpp_define (pfile
, "__cpp_nsdmi=200809");
852 cpp_define (pfile
, "__cpp_inheriting_constructors=200802");
853 cpp_define (pfile
, "__cpp_ref_qualifiers=200710");
854 cpp_define (pfile
, "__cpp_alias_templates=200704");
856 if (cxx_dialect
> cxx11
)
858 /* Set feature test macros for C++14 */
859 cpp_define (pfile
, "__cpp_return_type_deduction=201304");
860 cpp_define (pfile
, "__cpp_init_captures=201304");
861 cpp_define (pfile
, "__cpp_generic_lambdas=201304");
862 cpp_define (pfile
, "__cpp_constexpr=201304");
863 cpp_define (pfile
, "__cpp_decltype_auto=201304");
864 cpp_define (pfile
, "__cpp_aggregate_nsdmi=201304");
865 cpp_define (pfile
, "__cpp_variable_templates=201304");
866 cpp_define (pfile
, "__cpp_digit_separators=201309");
868 if (flag_sized_deallocation
)
869 cpp_define (pfile
, "__cpp_sized_deallocation=201309");
871 /* Note that we define this for C as well, so that we know if
872 __attribute__((cleanup)) will interface with EH. */
875 cpp_define (pfile
, "__EXCEPTIONS");
876 if (c_dialect_cxx ())
877 cpp_define (pfile
, "__cpp_exceptions=199711");
880 /* Represents the C++ ABI version, always defined so it can be used while
881 preprocessing C and assembler. */
882 if (flag_abi_version
== 0)
883 /* We should have set this to something real in c_common_post_options. */
885 else if (flag_abi_version
== 1)
886 /* Due to a historical accident, this version had the value
888 builtin_define_with_int_value ("__GXX_ABI_VERSION", 102);
890 /* Newer versions have values 1002, 1003, .... */
891 builtin_define_with_int_value ("__GXX_ABI_VERSION",
892 1000 + flag_abi_version
);
894 /* libgcc needs to know this. */
895 if (targetm_common
.except_unwind_info (&global_options
) == UI_SJLJ
)
896 cpp_define (pfile
, "__USING_SJLJ_EXCEPTIONS__");
898 /* limits.h and stdint.h need to know these. */
899 builtin_define_type_max ("__SCHAR_MAX__", signed_char_type_node
);
900 builtin_define_type_max ("__SHRT_MAX__", short_integer_type_node
);
901 builtin_define_type_max ("__INT_MAX__", integer_type_node
);
902 builtin_define_type_max ("__LONG_MAX__", long_integer_type_node
);
903 builtin_define_type_max ("__LONG_LONG_MAX__", long_long_integer_type_node
);
904 builtin_define_type_minmax ("__WCHAR_MIN__", "__WCHAR_MAX__",
905 underlying_wchar_type_node
);
906 builtin_define_type_minmax ("__WINT_MIN__", "__WINT_MAX__", wint_type_node
);
907 builtin_define_type_max ("__PTRDIFF_MAX__", ptrdiff_type_node
);
908 builtin_define_type_max ("__SIZE_MAX__", size_type_node
);
910 if (c_dialect_cxx ())
911 for (i
= 0; i
< NUM_INT_N_ENTS
; i
++)
912 if (int_n_enabled_p
[i
])
916 /* These are used to configure the C++ library. */
918 if (!flag_iso
|| int_n_data
[i
].bitsize
== POINTER_SIZE
)
920 sprintf (buf
, "__GLIBCXX_TYPE_INT_N_%d=__int%d", i
, int_n_data
[i
].bitsize
);
921 cpp_define (parse_in
, buf
);
923 sprintf (buf
, "__GLIBCXX_BITSIZE_INT_N_%d=%d", i
, int_n_data
[i
].bitsize
);
924 cpp_define (parse_in
, buf
);
928 /* stdint.h and the testsuite need to know these. */
929 builtin_define_stdint_macros ();
931 /* Provide information for library headers to determine whether to
932 define macros such as __STDC_IEC_559__ and
933 __STDC_IEC_559_COMPLEX__. */
934 builtin_define_with_int_value ("__GCC_IEC_559", cpp_iec_559_value ());
935 builtin_define_with_int_value ("__GCC_IEC_559_COMPLEX",
936 cpp_iec_559_complex_value ());
938 /* float.h needs to know this. */
939 builtin_define_with_int_value ("__FLT_EVAL_METHOD__",
940 TARGET_FLT_EVAL_METHOD
);
942 /* And decfloat.h needs this. */
943 builtin_define_with_int_value ("__DEC_EVAL_METHOD__",
944 TARGET_DEC_EVAL_METHOD
);
946 builtin_define_float_constants ("FLT", "F", "%s", "F", float_type_node
);
947 /* Cast the double precision constants. This is needed when single
948 precision constants are specified or when pragma FLOAT_CONST_DECIMAL64
949 is used. The correct result is computed by the compiler when using
950 macros that include a cast. We use a different cast for C++ to avoid
951 problems with -Wold-style-cast. */
952 builtin_define_float_constants ("DBL", "L",
956 "", double_type_node
);
957 builtin_define_float_constants ("LDBL", "L", "%s", "L",
958 long_double_type_node
);
960 /* For decfloat.h. */
961 builtin_define_decimal_float_constants ("DEC32", "DF", dfloat32_type_node
);
962 builtin_define_decimal_float_constants ("DEC64", "DD", dfloat64_type_node
);
963 builtin_define_decimal_float_constants ("DEC128", "DL", dfloat128_type_node
);
965 /* For fixed-point fibt, ibit, max, min, and epsilon. */
966 if (targetm
.fixed_point_supported_p ())
968 builtin_define_fixed_point_constants ("SFRACT", "HR",
969 short_fract_type_node
);
970 builtin_define_fixed_point_constants ("USFRACT", "UHR",
971 unsigned_short_fract_type_node
);
972 builtin_define_fixed_point_constants ("FRACT", "R",
974 builtin_define_fixed_point_constants ("UFRACT", "UR",
975 unsigned_fract_type_node
);
976 builtin_define_fixed_point_constants ("LFRACT", "LR",
977 long_fract_type_node
);
978 builtin_define_fixed_point_constants ("ULFRACT", "ULR",
979 unsigned_long_fract_type_node
);
980 builtin_define_fixed_point_constants ("LLFRACT", "LLR",
981 long_long_fract_type_node
);
982 builtin_define_fixed_point_constants ("ULLFRACT", "ULLR",
983 unsigned_long_long_fract_type_node
);
984 builtin_define_fixed_point_constants ("SACCUM", "HK",
985 short_accum_type_node
);
986 builtin_define_fixed_point_constants ("USACCUM", "UHK",
987 unsigned_short_accum_type_node
);
988 builtin_define_fixed_point_constants ("ACCUM", "K",
990 builtin_define_fixed_point_constants ("UACCUM", "UK",
991 unsigned_accum_type_node
);
992 builtin_define_fixed_point_constants ("LACCUM", "LK",
993 long_accum_type_node
);
994 builtin_define_fixed_point_constants ("ULACCUM", "ULK",
995 unsigned_long_accum_type_node
);
996 builtin_define_fixed_point_constants ("LLACCUM", "LLK",
997 long_long_accum_type_node
);
998 builtin_define_fixed_point_constants ("ULLACCUM", "ULLK",
999 unsigned_long_long_accum_type_node
);
1001 builtin_define_fixed_point_constants ("QQ", "", qq_type_node
);
1002 builtin_define_fixed_point_constants ("HQ", "", hq_type_node
);
1003 builtin_define_fixed_point_constants ("SQ", "", sq_type_node
);
1004 builtin_define_fixed_point_constants ("DQ", "", dq_type_node
);
1005 builtin_define_fixed_point_constants ("TQ", "", tq_type_node
);
1006 builtin_define_fixed_point_constants ("UQQ", "", uqq_type_node
);
1007 builtin_define_fixed_point_constants ("UHQ", "", uhq_type_node
);
1008 builtin_define_fixed_point_constants ("USQ", "", usq_type_node
);
1009 builtin_define_fixed_point_constants ("UDQ", "", udq_type_node
);
1010 builtin_define_fixed_point_constants ("UTQ", "", utq_type_node
);
1011 builtin_define_fixed_point_constants ("HA", "", ha_type_node
);
1012 builtin_define_fixed_point_constants ("SA", "", sa_type_node
);
1013 builtin_define_fixed_point_constants ("DA", "", da_type_node
);
1014 builtin_define_fixed_point_constants ("TA", "", ta_type_node
);
1015 builtin_define_fixed_point_constants ("UHA", "", uha_type_node
);
1016 builtin_define_fixed_point_constants ("USA", "", usa_type_node
);
1017 builtin_define_fixed_point_constants ("UDA", "", uda_type_node
);
1018 builtin_define_fixed_point_constants ("UTA", "", uta_type_node
);
1021 /* For libgcc-internal use only. */
1022 if (flag_building_libgcc
)
1024 /* Properties of floating-point modes for libgcc2.c. */
1025 for (machine_mode mode
= GET_CLASS_NARROWEST_MODE (MODE_FLOAT
);
1027 mode
= GET_MODE_WIDER_MODE (mode
))
1029 const char *name
= GET_MODE_NAME (mode
);
1031 = (char *) alloca (strlen (name
)
1032 + sizeof ("__LIBGCC__MANT_DIG__"));
1033 sprintf (macro_name
, "__LIBGCC_%s_MANT_DIG__", name
);
1034 builtin_define_with_int_value (macro_name
,
1035 REAL_MODE_FORMAT (mode
)->p
);
1036 if (!targetm
.scalar_mode_supported_p (mode
)
1037 || !targetm
.libgcc_floating_mode_supported_p (mode
))
1039 macro_name
= (char *) alloca (strlen (name
)
1040 + sizeof ("__LIBGCC_HAS__MODE__"));
1041 sprintf (macro_name
, "__LIBGCC_HAS_%s_MODE__", name
);
1042 cpp_define (pfile
, macro_name
);
1043 macro_name
= (char *) alloca (strlen (name
)
1044 + sizeof ("__LIBGCC__FUNC_EXT__"));
1045 sprintf (macro_name
, "__LIBGCC_%s_FUNC_EXT__", name
);
1047 if (mode
== TYPE_MODE (double_type_node
))
1049 else if (mode
== TYPE_MODE (float_type_node
))
1051 else if (mode
== TYPE_MODE (long_double_type_node
))
1053 /* ??? The following assumes the built-in functions (defined
1054 in target-specific code) match the suffixes used for
1055 constants. Because in fact such functions are not
1056 defined for the 'w' suffix, 'l' is used there
1058 else if (mode
== targetm
.c
.mode_for_suffix ('q'))
1060 else if (mode
== targetm
.c
.mode_for_suffix ('w'))
1064 builtin_define_with_value (macro_name
, suffix
, 0);
1065 bool excess_precision
= false;
1066 if (TARGET_FLT_EVAL_METHOD
!= 0
1067 && mode
!= TYPE_MODE (long_double_type_node
)
1068 && (mode
== TYPE_MODE (float_type_node
)
1069 || mode
== TYPE_MODE (double_type_node
)))
1070 switch (TARGET_FLT_EVAL_METHOD
)
1074 excess_precision
= true;
1078 excess_precision
= mode
== TYPE_MODE (float_type_node
);
1084 macro_name
= (char *) alloca (strlen (name
)
1085 + sizeof ("__LIBGCC__EXCESS_"
1087 sprintf (macro_name
, "__LIBGCC_%s_EXCESS_PRECISION__", name
);
1088 builtin_define_with_int_value (macro_name
, excess_precision
);
1091 /* For libgcc crtstuff.c and libgcc2.c. */
1092 builtin_define_with_int_value ("__LIBGCC_EH_TABLES_CAN_BE_READ_ONLY__",
1093 EH_TABLES_CAN_BE_READ_ONLY
);
1094 #ifdef EH_FRAME_SECTION_NAME
1095 builtin_define_with_value ("__LIBGCC_EH_FRAME_SECTION_NAME__",
1096 EH_FRAME_SECTION_NAME
, 1);
1098 #ifdef JCR_SECTION_NAME
1099 builtin_define_with_value ("__LIBGCC_JCR_SECTION_NAME__",
1100 JCR_SECTION_NAME
, 1);
1102 #ifdef CTORS_SECTION_ASM_OP
1103 builtin_define_with_value ("__LIBGCC_CTORS_SECTION_ASM_OP__",
1104 CTORS_SECTION_ASM_OP
, 1);
1106 #ifdef DTORS_SECTION_ASM_OP
1107 builtin_define_with_value ("__LIBGCC_DTORS_SECTION_ASM_OP__",
1108 DTORS_SECTION_ASM_OP
, 1);
1110 #ifdef TEXT_SECTION_ASM_OP
1111 builtin_define_with_value ("__LIBGCC_TEXT_SECTION_ASM_OP__",
1112 TEXT_SECTION_ASM_OP
, 1);
1114 #ifdef INIT_SECTION_ASM_OP
1115 builtin_define_with_value ("__LIBGCC_INIT_SECTION_ASM_OP__",
1116 INIT_SECTION_ASM_OP
, 1);
1118 #ifdef INIT_ARRAY_SECTION_ASM_OP
1119 /* Despite the name of this target macro, the expansion is not
1120 actually used, and may be empty rather than a string
1122 cpp_define (pfile
, "__LIBGCC_INIT_ARRAY_SECTION_ASM_OP__");
1125 /* For libgcc enable-execute-stack.c. */
1126 builtin_define_with_int_value ("__LIBGCC_TRAMPOLINE_SIZE__",
1129 /* For libgcc generic-morestack.c and unwinder code. */
1130 if (STACK_GROWS_DOWNWARD
)
1131 cpp_define (pfile
, "__LIBGCC_STACK_GROWS_DOWNWARD__");
1133 /* For libgcc unwinder code. */
1134 #ifdef DONT_USE_BUILTIN_SETJMP
1135 cpp_define (pfile
, "__LIBGCC_DONT_USE_BUILTIN_SETJMP__");
1137 #ifdef DWARF_ALT_FRAME_RETURN_COLUMN
1138 builtin_define_with_int_value ("__LIBGCC_DWARF_ALT_FRAME_RETURN_COLUMN__",
1139 DWARF_ALT_FRAME_RETURN_COLUMN
);
1141 builtin_define_with_int_value ("__LIBGCC_DWARF_FRAME_REGISTERS__",
1142 DWARF_FRAME_REGISTERS
);
1143 #ifdef EH_RETURN_STACKADJ_RTX
1144 cpp_define (pfile
, "__LIBGCC_EH_RETURN_STACKADJ_RTX__");
1147 builtin_define_with_int_value ("__LIBGCC_JMP_BUF_SIZE__",
1150 builtin_define_with_int_value ("__LIBGCC_STACK_POINTER_REGNUM__",
1151 STACK_POINTER_REGNUM
);
1154 builtin_define_with_int_value ("__LIBGCC_VTABLE_USES_DESCRIPTORS__",
1155 TARGET_VTABLE_USES_DESCRIPTORS
);
1158 /* For use in assembly language. */
1159 builtin_define_with_value ("__REGISTER_PREFIX__", REGISTER_PREFIX
, 0);
1160 builtin_define_with_value ("__USER_LABEL_PREFIX__", user_label_prefix
, 0);
1163 if (flag_gnu89_inline
)
1164 cpp_define (pfile
, "__GNUC_GNU_INLINE__");
1166 cpp_define (pfile
, "__GNUC_STDC_INLINE__");
1169 cpp_define (pfile
, "__NO_INLINE__");
1172 cpp_define (pfile
, "__STRICT_ANSI__");
1174 if (!flag_signed_char
)
1175 cpp_define (pfile
, "__CHAR_UNSIGNED__");
1177 if (c_dialect_cxx () && TYPE_UNSIGNED (wchar_type_node
))
1178 cpp_define (pfile
, "__WCHAR_UNSIGNED__");
1180 cpp_atomic_builtins (pfile
);
1182 #ifdef DWARF2_UNWIND_INFO
1183 if (dwarf2out_do_cfi_asm ())
1184 cpp_define (pfile
, "__GCC_HAVE_DWARF2_CFI_ASM");
1187 /* Make the choice of ObjC runtime visible to source code. */
1188 if (c_dialect_objc () && flag_next_runtime
)
1189 cpp_define (pfile
, "__NEXT_RUNTIME__");
1191 /* Show the availability of some target pragmas. */
1192 cpp_define (pfile
, "__PRAGMA_REDEFINE_EXTNAME");
1194 /* Make the choice of the stack protector runtime visible to source code.
1195 The macro names and values here were chosen for compatibility with an
1196 earlier implementation, i.e. ProPolice. */
1197 if (flag_stack_protect
== 4)
1198 cpp_define (pfile
, "__SSP_EXPLICIT__=4");
1199 if (flag_stack_protect
== 3)
1200 cpp_define (pfile
, "__SSP_STRONG__=3");
1201 if (flag_stack_protect
== 2)
1202 cpp_define (pfile
, "__SSP_ALL__=2");
1203 else if (flag_stack_protect
== 1)
1204 cpp_define (pfile
, "__SSP__=1");
1207 cpp_define (pfile
, "_OPENACC=201306");
1210 cpp_define (pfile
, "_OPENMP=201307");
1212 for (i
= 0; i
< NUM_INT_N_ENTS
; i
++)
1213 if (int_n_enabled_p
[i
])
1216 sprintf(buf
, "__SIZEOF_INT%d__", int_n_data
[i
].bitsize
);
1217 builtin_define_type_sizeof (buf
,
1218 int_n_trees
[i
].signed_type
);
1220 builtin_define_type_sizeof ("__SIZEOF_WCHAR_T__", wchar_type_node
);
1221 builtin_define_type_sizeof ("__SIZEOF_WINT_T__", wint_type_node
);
1222 builtin_define_type_sizeof ("__SIZEOF_PTRDIFF_T__",
1223 unsigned_ptrdiff_type_node
);
1225 /* A straightforward target hook doesn't work, because of problems
1226 linking that hook's body when part of non-C front ends. */
1227 # define preprocessing_asm_p() (cpp_get_options (pfile)->lang == CLK_ASM)
1228 # define preprocessing_trad_p() (cpp_get_options (pfile)->traditional)
1229 # define builtin_define(TXT) cpp_define (pfile, TXT)
1230 # define builtin_assert(TXT) cpp_assert (pfile, TXT)
1231 TARGET_CPU_CPP_BUILTINS ();
1232 TARGET_OS_CPP_BUILTINS ();
1233 TARGET_OBJFMT_CPP_BUILTINS ();
1235 /* Support the __declspec keyword by turning them into attributes.
1236 Note that the current way we do this may result in a collision
1237 with predefined attributes later on. This can be solved by using
1238 one attribute, say __declspec__, and passing args to it. The
1239 problem with that approach is that args are not accumulated: each
1240 new appearance would clobber any existing args. */
1241 if (TARGET_DECLSPEC
)
1242 builtin_define ("__declspec(x)=__attribute__((x))");
1244 /* If decimal floating point is supported, tell the user if the
1245 alternate format (BID) is used instead of the standard (DPD)
1247 if (ENABLE_DECIMAL_FLOAT
&& ENABLE_DECIMAL_BID_FORMAT
)
1248 cpp_define (pfile
, "__DECIMAL_BID_FORMAT__");
1251 /* Pass an object-like macro. If it doesn't lie in the user's
1252 namespace, defines it unconditionally. Otherwise define a version
1253 with two leading underscores, and another version with two leading
1254 and trailing underscores, and define the original only if an ISO
1255 standard was not nominated.
1257 e.g. passing "unix" defines "__unix", "__unix__" and possibly
1258 "unix". Passing "_mips" defines "__mips", "__mips__" and possibly
1261 builtin_define_std (const char *macro
)
1263 size_t len
= strlen (macro
);
1264 char *buff
= (char *) alloca (len
+ 5);
1268 /* prepend __ (or maybe just _) if in user's namespace. */
1269 memcpy (p
, macro
, len
+ 1);
1270 if (!( *p
== '_' && (p
[1] == '_' || ISUPPER (p
[1]))))
1277 cpp_define (parse_in
, p
);
1279 /* If it was in user's namespace... */
1282 /* Define the macro with leading and following __. */
1288 cpp_define (parse_in
, p
);
1290 /* Finally, define the original macro if permitted. */
1292 cpp_define (parse_in
, macro
);
1296 /* Pass an object-like macro and a value to define it to. The third
1297 parameter says whether or not to turn the value into a string
1300 builtin_define_with_value (const char *macro
, const char *expansion
, int is_str
)
1303 size_t mlen
= strlen (macro
);
1304 size_t elen
= strlen (expansion
);
1305 size_t extra
= 2; /* space for an = and a NUL */
1309 char *quoted_expansion
= (char *) alloca (elen
* 4 + 1);
1312 extra
+= 2; /* space for two quote marks */
1313 for (p
= expansion
, q
= quoted_expansion
; *p
; p
++)
1338 if (ISPRINT ((unsigned char) *p
))
1342 sprintf (q
, "\\%03o", (unsigned char) *p
);
1348 expansion
= quoted_expansion
;
1349 elen
= q
- expansion
;
1352 buf
= (char *) alloca (mlen
+ elen
+ extra
);
1354 sprintf (buf
, "%s=\"%s\"", macro
, expansion
);
1356 sprintf (buf
, "%s=%s", macro
, expansion
);
1358 cpp_define (parse_in
, buf
);
1362 /* Pass an object-like macro and an integer value to define it to. */
1364 builtin_define_with_int_value (const char *macro
, HOST_WIDE_INT value
)
1367 size_t mlen
= strlen (macro
);
1369 size_t extra
= 2; /* space for = and NUL. */
1371 buf
= (char *) alloca (mlen
+ vlen
+ extra
);
1372 memcpy (buf
, macro
, mlen
);
1374 sprintf (buf
+ mlen
+ 1, HOST_WIDE_INT_PRINT_DEC
, value
);
1376 cpp_define (parse_in
, buf
);
1379 /* builtin_define_with_hex_fp_value is very expensive, so the following
1380 array and function allows it to be done lazily when __DBL_MAX__
1381 etc. is first used. */
1383 struct GTY(()) lazy_hex_fp_value_struct
1385 const char *hex_str
;
1389 const char *fp_suffix
;
1391 static GTY(()) struct lazy_hex_fp_value_struct lazy_hex_fp_values
[12];
1392 static GTY(()) int lazy_hex_fp_value_count
;
1395 lazy_hex_fp_value (cpp_reader
*pfile ATTRIBUTE_UNUSED
,
1398 REAL_VALUE_TYPE real
;
1399 char dec_str
[64], buf1
[256];
1401 if (node
->value
.builtin
< BT_FIRST_USER
1402 || (int) node
->value
.builtin
>= BT_FIRST_USER
+ lazy_hex_fp_value_count
)
1405 idx
= node
->value
.builtin
- BT_FIRST_USER
;
1406 real_from_string (&real
, lazy_hex_fp_values
[idx
].hex_str
);
1407 real_to_decimal_for_mode (dec_str
, &real
, sizeof (dec_str
),
1408 lazy_hex_fp_values
[idx
].digits
, 0,
1409 lazy_hex_fp_values
[idx
].mode
);
1411 sprintf (buf1
, "%s%s", dec_str
, lazy_hex_fp_values
[idx
].fp_suffix
);
1412 node
->flags
&= ~(NODE_BUILTIN
| NODE_USED
);
1413 node
->value
.macro
= lazy_hex_fp_values
[idx
].macro
;
1414 for (idx
= 0; idx
< node
->value
.macro
->count
; idx
++)
1415 if (node
->value
.macro
->exp
.tokens
[idx
].type
== CPP_NUMBER
)
1417 gcc_assert (idx
< node
->value
.macro
->count
);
1418 node
->value
.macro
->exp
.tokens
[idx
].val
.str
.len
= strlen (buf1
);
1419 node
->value
.macro
->exp
.tokens
[idx
].val
.str
.text
1420 = (const unsigned char *) ggc_strdup (buf1
);
1424 /* Pass an object-like macro a hexadecimal floating-point value. */
1426 builtin_define_with_hex_fp_value (const char *macro
,
1427 tree type
, int digits
,
1428 const char *hex_str
,
1429 const char *fp_suffix
,
1430 const char *fp_cast
)
1432 REAL_VALUE_TYPE real
;
1433 char dec_str
[64], buf1
[256], buf2
[256];
1435 /* This is very expensive, so if possible expand them lazily. */
1436 if (lazy_hex_fp_value_count
< 12
1437 && flag_dump_macros
== 0
1438 && !cpp_get_options (parse_in
)->traditional
)
1440 struct cpp_hashnode
*node
;
1441 if (lazy_hex_fp_value_count
== 0)
1442 cpp_get_callbacks (parse_in
)->user_builtin_macro
= lazy_hex_fp_value
;
1443 sprintf (buf2
, fp_cast
, "1.1");
1444 sprintf (buf1
, "%s=%s", macro
, buf2
);
1445 cpp_define (parse_in
, buf1
);
1446 node
= C_CPP_HASHNODE (get_identifier (macro
));
1447 lazy_hex_fp_values
[lazy_hex_fp_value_count
].hex_str
1448 = ggc_strdup (hex_str
);
1449 lazy_hex_fp_values
[lazy_hex_fp_value_count
].mode
= TYPE_MODE (type
);
1450 lazy_hex_fp_values
[lazy_hex_fp_value_count
].digits
= digits
;
1451 lazy_hex_fp_values
[lazy_hex_fp_value_count
].fp_suffix
= fp_suffix
;
1452 lazy_hex_fp_values
[lazy_hex_fp_value_count
].macro
= node
->value
.macro
;
1453 node
->flags
|= NODE_BUILTIN
;
1455 = (enum cpp_builtin_type
) (BT_FIRST_USER
+ lazy_hex_fp_value_count
);
1456 lazy_hex_fp_value_count
++;
1460 /* Hex values are really cool and convenient, except that they're
1461 not supported in strict ISO C90 mode. First, the "p-" sequence
1462 is not valid as part of a preprocessor number. Second, we get a
1463 pedwarn from the preprocessor, which has no context, so we can't
1464 suppress the warning with __extension__.
1466 So instead what we do is construct the number in hex (because
1467 it's easy to get the exact correct value), parse it as a real,
1468 then print it back out as decimal. */
1470 real_from_string (&real
, hex_str
);
1471 real_to_decimal_for_mode (dec_str
, &real
, sizeof (dec_str
), digits
, 0,
1474 /* Assemble the macro in the following fashion
1475 macro = fp_cast [dec_str fp_suffix] */
1476 sprintf (buf1
, "%s%s", dec_str
, fp_suffix
);
1477 sprintf (buf2
, fp_cast
, buf1
);
1478 sprintf (buf1
, "%s=%s", macro
, buf2
);
1480 cpp_define (parse_in
, buf1
);
1483 /* Return a string constant for the suffix for a value of type TYPE
1484 promoted according to the integer promotions. The type must be one
1485 of the standard integer type nodes. */
1488 type_suffix (tree type
)
1490 static const char *const suffixes
[] = { "", "U", "L", "UL", "LL", "ULL" };
1491 int unsigned_suffix
;
1493 int tp
= TYPE_PRECISION (type
);
1495 if (type
== long_long_integer_type_node
1496 || type
== long_long_unsigned_type_node
1497 || tp
> TYPE_PRECISION (long_integer_type_node
))
1499 else if (type
== long_integer_type_node
1500 || type
== long_unsigned_type_node
1501 || tp
> TYPE_PRECISION (integer_type_node
))
1503 else if (type
== integer_type_node
1504 || type
== unsigned_type_node
1505 || type
== short_integer_type_node
1506 || type
== short_unsigned_type_node
1507 || type
== signed_char_type_node
1508 || type
== unsigned_char_type_node
1509 /* ??? "char" is not a signed or unsigned integer type and
1510 so is not permitted for the standard typedefs, but some
1511 systems use it anyway. */
1512 || type
== char_type_node
)
1517 unsigned_suffix
= TYPE_UNSIGNED (type
);
1518 if (TYPE_PRECISION (type
) < TYPE_PRECISION (integer_type_node
))
1519 unsigned_suffix
= 0;
1520 return suffixes
[is_long
* 2 + unsigned_suffix
];
1523 /* Define MACRO as a <stdint.h> constant-suffix macro for TYPE. */
1525 builtin_define_constants (const char *macro
, tree type
)
1530 suffix
= type_suffix (type
);
1534 buf
= (char *) alloca (strlen (macro
) + 6);
1535 sprintf (buf
, "%s(c)=c", macro
);
1539 buf
= (char *) alloca (strlen (macro
) + 9 + strlen (suffix
) + 1);
1540 sprintf (buf
, "%s(c)=c ## %s", macro
, suffix
);
1543 cpp_define (parse_in
, buf
);
1546 /* Define MAX for TYPE based on the precision of the type. */
1549 builtin_define_type_max (const char *macro
, tree type
)
1551 builtin_define_type_minmax (NULL
, macro
, type
);
1554 /* Given a value with COUNT LSBs set, fill BUF with a hexidecimal
1555 representation of that value. For example, a COUNT of 10 would
1559 print_bits_of_hex (char *buf
, int bufsz
, int count
)
1561 gcc_assert (bufsz
> 3);
1566 gcc_assert (count
> 0);
1568 switch (count
% 4) {
1589 gcc_assert (bufsz
> 1);
1594 gcc_assert (bufsz
> 0);
1598 /* Define MIN_MACRO (if not NULL) and MAX_MACRO for TYPE based on the
1599 precision of the type. */
1602 builtin_define_type_minmax (const char *min_macro
, const char *max_macro
,
1605 #define PBOH_SZ (MAX_BITSIZE_MODE_ANY_INT/4+4)
1606 char value
[PBOH_SZ
];
1612 bits
= TYPE_PRECISION (type
) + (TYPE_UNSIGNED (type
) ? 0 : -1);
1614 print_bits_of_hex (value
, PBOH_SZ
, bits
);
1616 suffix
= type_suffix (type
);
1618 buf
= (char *) alloca (strlen (max_macro
) + 1 + strlen (value
)
1619 + strlen (suffix
) + 1);
1620 sprintf (buf
, "%s=%s%s", max_macro
, value
, suffix
);
1622 cpp_define (parse_in
, buf
);
1626 if (TYPE_UNSIGNED (type
))
1628 buf
= (char *) alloca (strlen (min_macro
) + 2 + strlen (suffix
) + 1);
1629 sprintf (buf
, "%s=0%s", min_macro
, suffix
);
1633 buf
= (char *) alloca (strlen (min_macro
) + 3
1634 + strlen (max_macro
) + 6);
1635 sprintf (buf
, "%s=(-%s - 1)", min_macro
, max_macro
);
1637 cpp_define (parse_in
, buf
);
1641 #include "gt-c-family-c-cppbuiltin.h"