1 /* Define builtin-in macros for the C family front ends.
2 Copyright (C) 2002-2016 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"
25 #include "tm_p.h" /* For TARGET_CPU_CPP_BUILTINS & friends. */
26 #include "stringpool.h"
27 #include "stor-layout.h"
30 #include "output.h" /* For user_label_prefix. */
31 #include "debug.h" /* For dwarf2out_do_cfi_asm. */
32 #include "common/common-target.h"
33 #include "cpp-id-data.h"
34 #include "cppbuiltin.h"
36 #ifndef TARGET_OS_CPP_BUILTINS
37 # define TARGET_OS_CPP_BUILTINS()
40 #ifndef TARGET_OBJFMT_CPP_BUILTINS
41 # define TARGET_OBJFMT_CPP_BUILTINS()
44 #ifndef REGISTER_PREFIX
45 #define REGISTER_PREFIX ""
48 /* Non-static as some targets don't use it. */
49 static void builtin_define_with_hex_fp_value (const char *, tree
,
53 static void builtin_define_stdint_macros (void);
54 static void builtin_define_constants (const char *, tree
);
55 static void builtin_define_type_max (const char *, tree
);
56 static void builtin_define_type_minmax (const char *, const char *, tree
);
57 static void builtin_define_float_constants (const char *,
63 /* Return true if MODE provides a fast multiply/add (FMA) builtin function.
64 Originally this function used the fma optab, but that doesn't work with
65 -save-temps, so just rely on the HAVE_fma macros for the standard floating
69 mode_has_fma (machine_mode mode
)
100 /* Define NAME with value TYPE size_unit. */
102 builtin_define_type_sizeof (const char *name
, tree type
)
104 builtin_define_with_int_value (name
,
105 tree_to_uhwi (TYPE_SIZE_UNIT (type
)));
108 /* Define the float.h constants for TYPE using NAME_PREFIX, FP_SUFFIX,
111 builtin_define_float_constants (const char *name_prefix
,
112 const char *fp_suffix
,
114 const char *fma_suffix
,
117 /* Used to convert radix-based values to base 10 values in several cases.
119 In the max_exp -> max_10_exp conversion for 128-bit IEEE, we need at
120 least 6 significant digits for correct results. Using the fraction
121 formed by (log(2)*1e6)/(log(10)*1e6) overflows a 32-bit integer as an
122 intermediate; perhaps someone can find a better approximation, in the
123 mean time, I suspect using doubles won't harm the bootstrap here. */
125 const double log10_2
= .30102999566398119521;
127 const struct real_format
*fmt
;
128 const struct real_format
*ldfmt
;
130 char name
[64], buf
[128];
131 int dig
, min_10_exp
, max_10_exp
;
133 int type_decimal_dig
;
135 fmt
= REAL_MODE_FORMAT (TYPE_MODE (type
));
136 gcc_assert (fmt
->b
!= 10);
137 ldfmt
= REAL_MODE_FORMAT (TYPE_MODE (long_double_type_node
));
138 gcc_assert (ldfmt
->b
!= 10);
140 /* The radix of the exponent representation. */
141 if (type
== float_type_node
)
142 builtin_define_with_int_value ("__FLT_RADIX__", fmt
->b
);
145 /* The number of radix digits, p, in the floating-point significand. */
146 sprintf (name
, "__%s_MANT_DIG__", name_prefix
);
147 builtin_define_with_int_value (name
, fmt
->p
);
149 /* The number of decimal digits, q, such that any floating-point number
150 with q decimal digits can be rounded into a floating-point number with
151 p radix b digits and back again without change to the q decimal digits,
153 p log10 b if b is a power of 10
154 floor((p - 1) log10 b) otherwise
156 dig
= (fmt
->p
- 1) * log10_b
;
157 sprintf (name
, "__%s_DIG__", name_prefix
);
158 builtin_define_with_int_value (name
, dig
);
160 /* The minimum negative int x such that b**(x-1) is a normalized float. */
161 sprintf (name
, "__%s_MIN_EXP__", name_prefix
);
162 sprintf (buf
, "(%d)", fmt
->emin
);
163 builtin_define_with_value (name
, buf
, 0);
165 /* The minimum negative int x such that 10**x is a normalized float,
167 ceil (log10 (b ** (emin - 1)))
168 = ceil (log10 (b) * (emin - 1))
170 Recall that emin is negative, so the integer truncation calculates
171 the ceiling, not the floor, in this case. */
172 min_10_exp
= (fmt
->emin
- 1) * log10_b
;
173 sprintf (name
, "__%s_MIN_10_EXP__", name_prefix
);
174 sprintf (buf
, "(%d)", min_10_exp
);
175 builtin_define_with_value (name
, buf
, 0);
177 /* The maximum int x such that b**(x-1) is a representable float. */
178 sprintf (name
, "__%s_MAX_EXP__", name_prefix
);
179 builtin_define_with_int_value (name
, fmt
->emax
);
181 /* The maximum int x such that 10**x is in the range of representable
182 finite floating-point numbers,
184 floor (log10((1 - b**-p) * b**emax))
185 = floor (log10(1 - b**-p) + log10(b**emax))
186 = floor (log10(1 - b**-p) + log10(b)*emax)
188 The safest thing to do here is to just compute this number. But since
189 we don't link cc1 with libm, we cannot. We could implement log10 here
190 a series expansion, but that seems too much effort because:
192 Note that the first term, for all extant p, is a number exceedingly close
193 to zero, but slightly negative. Note that the second term is an integer
194 scaling an irrational number, and that because of the floor we are only
195 interested in its integral portion.
197 In order for the first term to have any effect on the integral portion
198 of the second term, the second term has to be exceedingly close to an
199 integer itself (e.g. 123.000000000001 or something). Getting a result
200 that close to an integer requires that the irrational multiplicand have
201 a long series of zeros in its expansion, which doesn't occur in the
202 first 20 digits or so of log10(b).
204 Hand-waving aside, crunching all of the sets of constants above by hand
205 does not yield a case for which the first term is significant, which
206 in the end is all that matters. */
207 max_10_exp
= fmt
->emax
* log10_b
;
208 sprintf (name
, "__%s_MAX_10_EXP__", name_prefix
);
209 builtin_define_with_int_value (name
, max_10_exp
);
211 /* The number of decimal digits, n, such that any floating-point number
212 can be rounded to n decimal digits and back again without change to
215 p * log10(b) if b is a power of 10
216 ceil(1 + p * log10(b)) otherwise
218 The only macro we care about is this number for the widest supported
219 floating type, but we want this value for rendering constants below. */
222 = 1 + (fmt
->p
< ldfmt
->p
? ldfmt
->p
: fmt
->p
) * log10_b
;
223 decimal_dig
= d_decimal_dig
;
224 if (decimal_dig
< d_decimal_dig
)
227 /* Similar, for this type rather than long double. */
229 double type_d_decimal_dig
= 1 + fmt
->p
* log10_b
;
230 type_decimal_dig
= type_d_decimal_dig
;
231 if (type_decimal_dig
< type_d_decimal_dig
)
234 if (type
== long_double_type_node
)
235 builtin_define_with_int_value ("__DECIMAL_DIG__", decimal_dig
);
238 sprintf (name
, "__%s_DECIMAL_DIG__", name_prefix
);
239 builtin_define_with_int_value (name
, type_decimal_dig
);
242 /* Since, for the supported formats, B is always a power of 2, we
243 construct the following numbers directly as a hexadecimal
245 get_max_float (fmt
, buf
, sizeof (buf
));
247 sprintf (name
, "__%s_MAX__", name_prefix
);
248 builtin_define_with_hex_fp_value (name
, type
, decimal_dig
, buf
, fp_suffix
, fp_cast
);
250 /* The minimum normalized positive floating-point number,
252 sprintf (name
, "__%s_MIN__", name_prefix
);
253 sprintf (buf
, "0x1p%d", fmt
->emin
- 1);
254 builtin_define_with_hex_fp_value (name
, type
, decimal_dig
, buf
, fp_suffix
, fp_cast
);
256 /* The difference between 1 and the least value greater than 1 that is
257 representable in the given floating point type, b**(1-p). */
258 sprintf (name
, "__%s_EPSILON__", name_prefix
);
259 if (fmt
->pnan
< fmt
->p
)
260 /* This is an IBM extended double format, so 1.0 + any double is
261 representable precisely. */
262 sprintf (buf
, "0x1p%d", fmt
->emin
- fmt
->p
);
264 sprintf (buf
, "0x1p%d", 1 - fmt
->p
);
265 builtin_define_with_hex_fp_value (name
, type
, decimal_dig
, buf
, fp_suffix
, fp_cast
);
267 /* For C++ std::numeric_limits<T>::denorm_min and C11 *_TRUE_MIN.
268 The minimum denormalized positive floating-point number, b**(emin-p).
269 The minimum normalized positive floating-point number for formats
270 that don't support denormals. */
271 sprintf (name
, "__%s_DENORM_MIN__", name_prefix
);
272 sprintf (buf
, "0x1p%d", fmt
->emin
- (fmt
->has_denorm
? fmt
->p
: 1));
273 builtin_define_with_hex_fp_value (name
, type
, decimal_dig
,
274 buf
, fp_suffix
, fp_cast
);
276 sprintf (name
, "__%s_HAS_DENORM__", name_prefix
);
277 builtin_define_with_value (name
, fmt
->has_denorm
? "1" : "0", 0);
279 /* For C++ std::numeric_limits<T>::has_infinity. */
280 sprintf (name
, "__%s_HAS_INFINITY__", name_prefix
);
281 builtin_define_with_int_value (name
,
282 MODE_HAS_INFINITIES (TYPE_MODE (type
)));
283 /* For C++ std::numeric_limits<T>::has_quiet_NaN. We do not have a
284 predicate to distinguish a target that has both quiet and
285 signalling NaNs from a target that has only quiet NaNs or only
286 signalling NaNs, so we assume that a target that has any kind of
287 NaN has quiet NaNs. */
288 sprintf (name
, "__%s_HAS_QUIET_NAN__", name_prefix
);
289 builtin_define_with_int_value (name
, MODE_HAS_NANS (TYPE_MODE (type
)));
291 /* Note whether we have fast FMA. */
292 if (mode_has_fma (TYPE_MODE (type
)))
294 sprintf (name
, "__FP_FAST_FMA%s", fma_suffix
);
295 builtin_define_with_int_value (name
, 1);
299 /* Define __DECx__ constants for TYPE using NAME_PREFIX and SUFFIX. */
301 builtin_define_decimal_float_constants (const char *name_prefix
,
305 const struct real_format
*fmt
;
306 char name
[64], buf
[128], *p
;
309 fmt
= REAL_MODE_FORMAT (TYPE_MODE (type
));
311 /* The number of radix digits, p, in the significand. */
312 sprintf (name
, "__%s_MANT_DIG__", name_prefix
);
313 builtin_define_with_int_value (name
, fmt
->p
);
315 /* The minimum negative int x such that b**(x-1) is a normalized float. */
316 sprintf (name
, "__%s_MIN_EXP__", name_prefix
);
317 sprintf (buf
, "(%d)", fmt
->emin
);
318 builtin_define_with_value (name
, buf
, 0);
320 /* The maximum int x such that b**(x-1) is a representable float. */
321 sprintf (name
, "__%s_MAX_EXP__", name_prefix
);
322 builtin_define_with_int_value (name
, fmt
->emax
);
324 /* Compute the minimum representable value. */
325 sprintf (name
, "__%s_MIN__", name_prefix
);
326 sprintf (buf
, "1E%d%s", fmt
->emin
- 1, suffix
);
327 builtin_define_with_value (name
, buf
, 0);
329 /* Compute the maximum representable value. */
330 sprintf (name
, "__%s_MAX__", name_prefix
);
332 for (digits
= fmt
->p
; digits
; digits
--)
335 if (digits
== fmt
->p
)
339 /* fmt->p plus 1, to account for the decimal point and fmt->emax
340 minus 1 because the digits are nines, not 1.0. */
341 sprintf (&buf
[fmt
->p
+ 1], "E%d%s", fmt
->emax
- 1, suffix
);
342 builtin_define_with_value (name
, buf
, 0);
344 /* Compute epsilon (the difference between 1 and least value greater
345 than 1 representable). */
346 sprintf (name
, "__%s_EPSILON__", name_prefix
);
347 sprintf (buf
, "1E-%d%s", fmt
->p
- 1, suffix
);
348 builtin_define_with_value (name
, buf
, 0);
350 /* Minimum subnormal positive decimal value. */
351 sprintf (name
, "__%s_SUBNORMAL_MIN__", name_prefix
);
353 for (digits
= fmt
->p
; digits
> 1; digits
--)
356 if (digits
== fmt
->p
)
360 sprintf (&buf
[fmt
->p
], "1E%d%s", fmt
->emin
- 1, suffix
);
361 builtin_define_with_value (name
, buf
, 0);
364 /* Define fixed-point constants for TYPE using NAME_PREFIX and SUFFIX. */
367 builtin_define_fixed_point_constants (const char *name_prefix
,
371 char name
[64], buf
[256], *new_buf
;
374 sprintf (name
, "__%s_FBIT__", name_prefix
);
375 builtin_define_with_int_value (name
, TYPE_FBIT (type
));
377 sprintf (name
, "__%s_IBIT__", name_prefix
);
378 builtin_define_with_int_value (name
, TYPE_IBIT (type
));
380 /* If there is no suffix, defines are for fixed-point modes.
382 if (strcmp (suffix
, "") == 0)
385 if (TYPE_UNSIGNED (type
))
387 sprintf (name
, "__%s_MIN__", name_prefix
);
388 sprintf (buf
, "0.0%s", suffix
);
389 builtin_define_with_value (name
, buf
, 0);
393 sprintf (name
, "__%s_MIN__", name_prefix
);
394 if (ALL_ACCUM_MODE_P (TYPE_MODE (type
)))
395 sprintf (buf
, "(-0X1P%d%s-0X1P%d%s)", TYPE_IBIT (type
) - 1, suffix
,
396 TYPE_IBIT (type
) - 1, suffix
);
398 sprintf (buf
, "(-0.5%s-0.5%s)", suffix
, suffix
);
399 builtin_define_with_value (name
, buf
, 0);
402 sprintf (name
, "__%s_MAX__", name_prefix
);
405 mod
= (TYPE_FBIT (type
) + TYPE_IBIT (type
)) % 4;
407 sprintf (new_buf
++, "%x", (1 << mod
) - 1);
408 for (i
= 0; i
< (TYPE_FBIT (type
) + TYPE_IBIT (type
)) / 4; i
++)
409 sprintf (new_buf
++, "F");
410 sprintf (new_buf
, "P-%d%s", TYPE_FBIT (type
), suffix
);
411 builtin_define_with_value (name
, buf
, 0);
413 sprintf (name
, "__%s_EPSILON__", name_prefix
);
414 sprintf (buf
, "0x1P-%d%s", TYPE_FBIT (type
), suffix
);
415 builtin_define_with_value (name
, buf
, 0);
418 /* Define macros used by <stdint.h>. */
420 builtin_define_stdint_macros (void)
422 builtin_define_type_max ("__INTMAX_MAX__", intmax_type_node
);
423 builtin_define_constants ("__INTMAX_C", intmax_type_node
);
424 builtin_define_type_max ("__UINTMAX_MAX__", uintmax_type_node
);
425 builtin_define_constants ("__UINTMAX_C", uintmax_type_node
);
426 if (sig_atomic_type_node
)
427 builtin_define_type_minmax ("__SIG_ATOMIC_MIN__", "__SIG_ATOMIC_MAX__",
428 sig_atomic_type_node
);
430 builtin_define_type_max ("__INT8_MAX__", int8_type_node
);
432 builtin_define_type_max ("__INT16_MAX__", int16_type_node
);
434 builtin_define_type_max ("__INT32_MAX__", int32_type_node
);
436 builtin_define_type_max ("__INT64_MAX__", int64_type_node
);
438 builtin_define_type_max ("__UINT8_MAX__", uint8_type_node
);
439 if (c_uint16_type_node
)
440 builtin_define_type_max ("__UINT16_MAX__", c_uint16_type_node
);
441 if (c_uint32_type_node
)
442 builtin_define_type_max ("__UINT32_MAX__", c_uint32_type_node
);
443 if (c_uint64_type_node
)
444 builtin_define_type_max ("__UINT64_MAX__", c_uint64_type_node
);
445 if (int_least8_type_node
)
447 builtin_define_type_max ("__INT_LEAST8_MAX__", int_least8_type_node
);
448 builtin_define_constants ("__INT8_C", int_least8_type_node
);
450 if (int_least16_type_node
)
452 builtin_define_type_max ("__INT_LEAST16_MAX__", int_least16_type_node
);
453 builtin_define_constants ("__INT16_C", int_least16_type_node
);
455 if (int_least32_type_node
)
457 builtin_define_type_max ("__INT_LEAST32_MAX__", int_least32_type_node
);
458 builtin_define_constants ("__INT32_C", int_least32_type_node
);
460 if (int_least64_type_node
)
462 builtin_define_type_max ("__INT_LEAST64_MAX__", int_least64_type_node
);
463 builtin_define_constants ("__INT64_C", int_least64_type_node
);
465 if (uint_least8_type_node
)
467 builtin_define_type_max ("__UINT_LEAST8_MAX__", uint_least8_type_node
);
468 builtin_define_constants ("__UINT8_C", uint_least8_type_node
);
470 if (uint_least16_type_node
)
472 builtin_define_type_max ("__UINT_LEAST16_MAX__", uint_least16_type_node
);
473 builtin_define_constants ("__UINT16_C", uint_least16_type_node
);
475 if (uint_least32_type_node
)
477 builtin_define_type_max ("__UINT_LEAST32_MAX__", uint_least32_type_node
);
478 builtin_define_constants ("__UINT32_C", uint_least32_type_node
);
480 if (uint_least64_type_node
)
482 builtin_define_type_max ("__UINT_LEAST64_MAX__", uint_least64_type_node
);
483 builtin_define_constants ("__UINT64_C", uint_least64_type_node
);
485 if (int_fast8_type_node
)
486 builtin_define_type_max ("__INT_FAST8_MAX__", int_fast8_type_node
);
487 if (int_fast16_type_node
)
488 builtin_define_type_max ("__INT_FAST16_MAX__", int_fast16_type_node
);
489 if (int_fast32_type_node
)
490 builtin_define_type_max ("__INT_FAST32_MAX__", int_fast32_type_node
);
491 if (int_fast64_type_node
)
492 builtin_define_type_max ("__INT_FAST64_MAX__", int_fast64_type_node
);
493 if (uint_fast8_type_node
)
494 builtin_define_type_max ("__UINT_FAST8_MAX__", uint_fast8_type_node
);
495 if (uint_fast16_type_node
)
496 builtin_define_type_max ("__UINT_FAST16_MAX__", uint_fast16_type_node
);
497 if (uint_fast32_type_node
)
498 builtin_define_type_max ("__UINT_FAST32_MAX__", uint_fast32_type_node
);
499 if (uint_fast64_type_node
)
500 builtin_define_type_max ("__UINT_FAST64_MAX__", uint_fast64_type_node
);
501 if (intptr_type_node
)
502 builtin_define_type_max ("__INTPTR_MAX__", intptr_type_node
);
503 if (uintptr_type_node
)
504 builtin_define_type_max ("__UINTPTR_MAX__", uintptr_type_node
);
507 /* Adjust the optimization macros when a #pragma GCC optimization is done to
508 reflect the current level. */
510 c_cpp_builtins_optimize_pragma (cpp_reader
*pfile
, tree prev_tree
,
513 struct cl_optimization
*prev
= TREE_OPTIMIZATION (prev_tree
);
514 struct cl_optimization
*cur
= TREE_OPTIMIZATION (cur_tree
);
518 /* -undef turns off target-specific built-ins. */
522 /* Other target-independent built-ins determined by command-line
524 if (!prev
->x_optimize_size
&& cur
->x_optimize_size
)
525 cpp_define (pfile
, "__OPTIMIZE_SIZE__");
526 else if (prev
->x_optimize_size
&& !cur
->x_optimize_size
)
527 cpp_undef (pfile
, "__OPTIMIZE_SIZE__");
529 if (!prev
->x_optimize
&& cur
->x_optimize
)
530 cpp_define (pfile
, "__OPTIMIZE__");
531 else if (prev
->x_optimize
&& !cur
->x_optimize
)
532 cpp_undef (pfile
, "__OPTIMIZE__");
534 prev_fast_math
= fast_math_flags_struct_set_p (prev
);
535 cur_fast_math
= fast_math_flags_struct_set_p (cur
);
536 if (!prev_fast_math
&& cur_fast_math
)
537 cpp_define (pfile
, "__FAST_MATH__");
538 else if (prev_fast_math
&& !cur_fast_math
)
539 cpp_undef (pfile
, "__FAST_MATH__");
541 if (!prev
->x_flag_signaling_nans
&& cur
->x_flag_signaling_nans
)
542 cpp_define (pfile
, "__SUPPORT_SNAN__");
543 else if (prev
->x_flag_signaling_nans
&& !cur
->x_flag_signaling_nans
)
544 cpp_undef (pfile
, "__SUPPORT_SNAN__");
546 if (!prev
->x_flag_errno_math
&& cur
->x_flag_errno_math
)
547 cpp_undef (pfile
, "__NO_MATH_ERRNO__");
548 else if (prev
->x_flag_errno_math
&& !cur
->x_flag_errno_math
)
549 cpp_define (pfile
, "__NO_MATH_ERRNO__");
551 if (!prev
->x_flag_finite_math_only
&& cur
->x_flag_finite_math_only
)
553 cpp_undef (pfile
, "__FINITE_MATH_ONLY__");
554 cpp_define (pfile
, "__FINITE_MATH_ONLY__=1");
556 else if (prev
->x_flag_finite_math_only
&& !cur
->x_flag_finite_math_only
)
558 cpp_undef (pfile
, "__FINITE_MATH_ONLY__");
559 cpp_define (pfile
, "__FINITE_MATH_ONLY__=0");
564 /* This function will emit cpp macros to indicate the presence of various lock
565 free atomic operations. */
568 cpp_atomic_builtins (cpp_reader
*pfile
)
570 /* Set a flag for each size of object that compare and swap exists for up to
572 #define SWAP_LIMIT 17
573 bool have_swap
[SWAP_LIMIT
];
576 /* Clear the map of sizes compare_and swap exists for. */
577 memset (have_swap
, 0, sizeof (have_swap
));
579 /* Tell source code if the compiler makes sync_compare_and_swap
580 builtins available. */
581 #ifndef HAVE_sync_compare_and_swapqi
582 #define HAVE_sync_compare_and_swapqi 0
584 #ifndef HAVE_atomic_compare_and_swapqi
585 #define HAVE_atomic_compare_and_swapqi 0
588 if (HAVE_sync_compare_and_swapqi
|| HAVE_atomic_compare_and_swapqi
)
590 cpp_define (pfile
, "__GCC_HAVE_SYNC_COMPARE_AND_SWAP_1");
594 #ifndef HAVE_sync_compare_and_swaphi
595 #define HAVE_sync_compare_and_swaphi 0
597 #ifndef HAVE_atomic_compare_and_swaphi
598 #define HAVE_atomic_compare_and_swaphi 0
600 if (HAVE_sync_compare_and_swaphi
|| HAVE_atomic_compare_and_swaphi
)
602 cpp_define (pfile
, "__GCC_HAVE_SYNC_COMPARE_AND_SWAP_2");
606 #ifndef HAVE_sync_compare_and_swapsi
607 #define HAVE_sync_compare_and_swapsi 0
609 #ifndef HAVE_atomic_compare_and_swapsi
610 #define HAVE_atomic_compare_and_swapsi 0
612 if (HAVE_sync_compare_and_swapsi
|| HAVE_atomic_compare_and_swapsi
)
614 cpp_define (pfile
, "__GCC_HAVE_SYNC_COMPARE_AND_SWAP_4");
618 #ifndef HAVE_sync_compare_and_swapdi
619 #define HAVE_sync_compare_and_swapdi 0
621 #ifndef HAVE_atomic_compare_and_swapdi
622 #define HAVE_atomic_compare_and_swapdi 0
624 if (HAVE_sync_compare_and_swapdi
|| HAVE_atomic_compare_and_swapdi
)
626 cpp_define (pfile
, "__GCC_HAVE_SYNC_COMPARE_AND_SWAP_8");
630 #ifndef HAVE_sync_compare_and_swapti
631 #define HAVE_sync_compare_and_swapti 0
633 #ifndef HAVE_atomic_compare_and_swapti
634 #define HAVE_atomic_compare_and_swapti 0
636 if (HAVE_sync_compare_and_swapti
|| HAVE_atomic_compare_and_swapti
)
638 cpp_define (pfile
, "__GCC_HAVE_SYNC_COMPARE_AND_SWAP_16");
639 have_swap
[16] = true;
642 /* Tell the source code about various types. These map to the C++11 and C11
643 macros where 2 indicates lock-free always, and 1 indicates sometimes
645 #define SIZEOF_NODE(T) (tree_to_uhwi (TYPE_SIZE_UNIT (T)))
646 #define SWAP_INDEX(T) ((SIZEOF_NODE (T) < SWAP_LIMIT) ? SIZEOF_NODE (T) : 0)
647 builtin_define_with_int_value ("__GCC_ATOMIC_BOOL_LOCK_FREE",
648 (have_swap
[SWAP_INDEX (boolean_type_node
)]? 2 : 1));
649 builtin_define_with_int_value ("__GCC_ATOMIC_CHAR_LOCK_FREE",
650 (have_swap
[SWAP_INDEX (signed_char_type_node
)]? 2 : 1));
651 builtin_define_with_int_value ("__GCC_ATOMIC_CHAR16_T_LOCK_FREE",
652 (have_swap
[SWAP_INDEX (char16_type_node
)]? 2 : 1));
653 builtin_define_with_int_value ("__GCC_ATOMIC_CHAR32_T_LOCK_FREE",
654 (have_swap
[SWAP_INDEX (char32_type_node
)]? 2 : 1));
655 builtin_define_with_int_value ("__GCC_ATOMIC_WCHAR_T_LOCK_FREE",
656 (have_swap
[SWAP_INDEX (wchar_type_node
)]? 2 : 1));
657 builtin_define_with_int_value ("__GCC_ATOMIC_SHORT_LOCK_FREE",
658 (have_swap
[SWAP_INDEX (short_integer_type_node
)]? 2 : 1));
659 builtin_define_with_int_value ("__GCC_ATOMIC_INT_LOCK_FREE",
660 (have_swap
[SWAP_INDEX (integer_type_node
)]? 2 : 1));
661 builtin_define_with_int_value ("__GCC_ATOMIC_LONG_LOCK_FREE",
662 (have_swap
[SWAP_INDEX (long_integer_type_node
)]? 2 : 1));
663 builtin_define_with_int_value ("__GCC_ATOMIC_LLONG_LOCK_FREE",
664 (have_swap
[SWAP_INDEX (long_long_integer_type_node
)]? 2 : 1));
666 /* If we're dealing with a "set" value that doesn't exactly correspond
667 to a boolean truth value, let the library work around that. */
668 builtin_define_with_int_value ("__GCC_ATOMIC_TEST_AND_SET_TRUEVAL",
669 targetm
.atomic_test_and_set_trueval
);
671 /* ptr_type_node can't be used here since ptr_mode is only set when
672 toplev calls backend_init which is not done with -E or pch. */
673 psize
= POINTER_SIZE_UNITS
;
674 if (psize
>= SWAP_LIMIT
)
676 builtin_define_with_int_value ("__GCC_ATOMIC_POINTER_LOCK_FREE",
677 (have_swap
[psize
]? 2 : 1));
680 /* Return the value for __GCC_IEC_559. */
682 cpp_iec_559_value (void)
684 /* The default is support for IEEE 754-2008. */
687 /* float and double must be binary32 and binary64. If they are but
688 with reversed NaN convention, at most IEEE 754-1985 is
690 const struct real_format
*ffmt
691 = REAL_MODE_FORMAT (TYPE_MODE (float_type_node
));
692 const struct real_format
*dfmt
693 = REAL_MODE_FORMAT (TYPE_MODE (double_type_node
));
694 if (!ffmt
->qnan_msb_set
|| !dfmt
->qnan_msb_set
)
699 || ffmt
->emin
!= -125
701 || ffmt
->signbit_rw
!= 31
702 || ffmt
->round_towards_zero
703 || !ffmt
->has_sign_dependent_rounding
707 || !ffmt
->has_signed_zero
711 || dfmt
->emin
!= -1021
712 || dfmt
->emax
!= 1024
713 || dfmt
->signbit_rw
!= 63
714 || dfmt
->round_towards_zero
715 || !dfmt
->has_sign_dependent_rounding
719 || !dfmt
->has_signed_zero
)
722 /* In strict C standards conformance mode, consider unpredictable
723 excess precision to mean lack of IEEE 754 support. The same
724 applies to unpredictable contraction. For C++, and outside
725 strict conformance mode, do not consider these options to mean
726 lack of IEEE 754 support. */
729 && TARGET_FLT_EVAL_METHOD
!= 0
730 && flag_excess_precision_cmdline
!= EXCESS_PRECISION_STANDARD
)
734 && flag_fp_contract_mode
== FP_CONTRACT_FAST
)
737 /* Various options are contrary to IEEE 754 semantics. */
738 if (flag_unsafe_math_optimizations
739 || flag_associative_math
740 || flag_reciprocal_math
741 || flag_finite_math_only
742 || !flag_signed_zeros
743 || flag_single_precision_constant
)
746 /* If the target does not support IEEE 754 exceptions and rounding
747 modes, consider IEEE 754 support to be absent. */
748 if (!targetm
.float_exceptions_rounding_supported_p ())
754 /* Return the value for __GCC_IEC_559_COMPLEX. */
756 cpp_iec_559_complex_value (void)
758 /* The value is no bigger than that of __GCC_IEC_559. */
759 int ret
= cpp_iec_559_value ();
761 /* Some options are contrary to the required default state of the
762 CX_LIMITED_RANGE pragma. */
763 if (flag_complex_method
!= 2)
769 /* Hook that registers front end and target-specific built-ins. */
771 c_cpp_builtins (cpp_reader
*pfile
)
775 /* -undef turns off target-specific built-ins. */
779 define_language_independent_builtin_macros (pfile
);
781 if (c_dialect_cxx ())
784 parse_basever (&major
, NULL
, NULL
);
785 cpp_define_formatted (pfile
, "__GNUG__=%d", major
);
788 /* For stddef.h. They require macros defined in c-common.c. */
789 c_stddef_cpp_builtins ();
791 /* Set include test macros for all C/C++ (not for just C++11 etc.)
792 The builtins __has_include__ and __has_include_next__ are defined
794 cpp_define (pfile
, "__has_include(STR)=__has_include__(STR)");
795 cpp_define (pfile
, "__has_include_next(STR)=__has_include_next__(STR)");
797 if (c_dialect_cxx ())
799 if (flag_weak
&& SUPPORTS_ONE_ONLY
)
800 cpp_define (pfile
, "__GXX_WEAK__=1");
802 cpp_define (pfile
, "__GXX_WEAK__=0");
805 cpp_define (pfile
, "__DEPRECATED");
809 cpp_define (pfile
, "__GXX_RTTI");
810 cpp_define (pfile
, "__cpp_rtti=199711");
813 if (cxx_dialect
>= cxx11
)
814 cpp_define (pfile
, "__GXX_EXPERIMENTAL_CXX0X__");
816 /* Binary literals have been allowed in g++ before C++11
817 and were standardized for C++14. */
818 if (!pedantic
|| cxx_dialect
> cxx11
)
819 cpp_define (pfile
, "__cpp_binary_literals=201304");
821 /* Similarly for hexadecimal floating point literals and C++17. */
822 if (!pedantic
|| cpp_get_options (parse_in
)->extended_numbers
)
823 cpp_define (pfile
, "__cpp_hex_float=201603");
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 if (cxx_dialect
<= cxx14
)
837 cpp_define (pfile
, "__cpp_unicode_characters=200704");
838 cpp_define (pfile
, "__cpp_raw_strings=200710");
839 cpp_define (pfile
, "__cpp_unicode_literals=200710");
840 cpp_define (pfile
, "__cpp_user_defined_literals=200809");
841 cpp_define (pfile
, "__cpp_lambdas=200907");
842 if (cxx_dialect
== cxx11
)
843 cpp_define (pfile
, "__cpp_constexpr=200704");
844 if (cxx_dialect
<= cxx14
)
845 cpp_define (pfile
, "__cpp_range_based_for=200907");
846 if (cxx_dialect
<= cxx14
)
847 cpp_define (pfile
, "__cpp_static_assert=200410");
848 cpp_define (pfile
, "__cpp_decltype=200707");
849 cpp_define (pfile
, "__cpp_attributes=200809");
850 cpp_define (pfile
, "__cpp_rvalue_reference=200610");
851 cpp_define (pfile
, "__cpp_rvalue_references=200610");
852 cpp_define (pfile
, "__cpp_variadic_templates=200704");
853 cpp_define (pfile
, "__cpp_initializer_lists=200806");
854 cpp_define (pfile
, "__cpp_delegating_constructors=200604");
855 cpp_define (pfile
, "__cpp_nsdmi=200809");
856 cpp_define (pfile
, "__cpp_inheriting_constructors=200802");
857 cpp_define (pfile
, "__cpp_ref_qualifiers=200710");
858 cpp_define (pfile
, "__cpp_alias_templates=200704");
860 if (cxx_dialect
> cxx11
)
862 /* Set feature test macros for C++14. */
863 cpp_define (pfile
, "__cpp_return_type_deduction=201304");
864 cpp_define (pfile
, "__cpp_init_captures=201304");
865 cpp_define (pfile
, "__cpp_generic_lambdas=201304");
866 cpp_define (pfile
, "__cpp_constexpr=201304");
867 cpp_define (pfile
, "__cpp_decltype_auto=201304");
868 cpp_define (pfile
, "__cpp_aggregate_nsdmi=201304");
869 cpp_define (pfile
, "__cpp_variable_templates=201304");
870 cpp_define (pfile
, "__cpp_digit_separators=201309");
872 if (cxx_dialect
> cxx14
)
874 /* Set feature test macros for C++1z. */
875 cpp_define (pfile
, "__cpp_unicode_characters=201411");
876 cpp_define (pfile
, "__cpp_static_assert=201411");
877 cpp_define (pfile
, "__cpp_namespace_attributes=201411");
878 cpp_define (pfile
, "__cpp_enumerator_attributes=201411");
879 cpp_define (pfile
, "__cpp_nested_namespace_definitions=201411");
880 cpp_define (pfile
, "__cpp_fold_expressions=201603");
881 cpp_define (pfile
, "__cpp_nontype_template_args=201411");
882 cpp_define (pfile
, "__cpp_range_based_for=201603");
885 /* Use a value smaller than the 201507 specified in
886 the TS, since we don't yet support extended auto. */
887 cpp_define (pfile
, "__cpp_concepts=201500");
889 /* Use a value smaller than the 201505 specified in
890 the TS, since we don't yet support atomic_cancel. */
891 cpp_define (pfile
, "__cpp_transactional_memory=210500");
892 if (flag_sized_deallocation
)
893 cpp_define (pfile
, "__cpp_sized_deallocation=201309");
895 /* Note that we define this for C as well, so that we know if
896 __attribute__((cleanup)) will interface with EH. */
899 cpp_define (pfile
, "__EXCEPTIONS");
900 if (c_dialect_cxx ())
901 cpp_define (pfile
, "__cpp_exceptions=199711");
904 /* Represents the C++ ABI version, always defined so it can be used while
905 preprocessing C and assembler. */
906 if (flag_abi_version
== 0)
907 /* We should have set this to something real in c_common_post_options. */
909 else if (flag_abi_version
== 1)
910 /* Due to a historical accident, this version had the value
912 builtin_define_with_int_value ("__GXX_ABI_VERSION", 102);
914 /* Newer versions have values 1002, 1003, .... */
915 builtin_define_with_int_value ("__GXX_ABI_VERSION",
916 1000 + flag_abi_version
);
918 /* libgcc needs to know this. */
919 if (targetm_common
.except_unwind_info (&global_options
) == UI_SJLJ
)
920 cpp_define (pfile
, "__USING_SJLJ_EXCEPTIONS__");
922 /* limits.h and stdint.h need to know these. */
923 builtin_define_type_max ("__SCHAR_MAX__", signed_char_type_node
);
924 builtin_define_type_max ("__SHRT_MAX__", short_integer_type_node
);
925 builtin_define_type_max ("__INT_MAX__", integer_type_node
);
926 builtin_define_type_max ("__LONG_MAX__", long_integer_type_node
);
927 builtin_define_type_max ("__LONG_LONG_MAX__", long_long_integer_type_node
);
928 builtin_define_type_minmax ("__WCHAR_MIN__", "__WCHAR_MAX__",
929 underlying_wchar_type_node
);
930 builtin_define_type_minmax ("__WINT_MIN__", "__WINT_MAX__", wint_type_node
);
931 builtin_define_type_max ("__PTRDIFF_MAX__", ptrdiff_type_node
);
932 builtin_define_type_max ("__SIZE_MAX__", size_type_node
);
934 if (c_dialect_cxx ())
935 for (i
= 0; i
< NUM_INT_N_ENTS
; i
++)
936 if (int_n_enabled_p
[i
])
940 /* These are used to configure the C++ library. */
942 if (!flag_iso
|| int_n_data
[i
].bitsize
== POINTER_SIZE
)
944 sprintf (buf
, "__GLIBCXX_TYPE_INT_N_%d=__int%d", i
, int_n_data
[i
].bitsize
);
945 cpp_define (parse_in
, buf
);
947 sprintf (buf
, "__GLIBCXX_BITSIZE_INT_N_%d=%d", i
, int_n_data
[i
].bitsize
);
948 cpp_define (parse_in
, buf
);
952 /* stdint.h and the testsuite need to know these. */
953 builtin_define_stdint_macros ();
955 /* Provide information for library headers to determine whether to
956 define macros such as __STDC_IEC_559__ and
957 __STDC_IEC_559_COMPLEX__. */
958 builtin_define_with_int_value ("__GCC_IEC_559", cpp_iec_559_value ());
959 builtin_define_with_int_value ("__GCC_IEC_559_COMPLEX",
960 cpp_iec_559_complex_value ());
962 /* float.h needs to know this. */
963 builtin_define_with_int_value ("__FLT_EVAL_METHOD__",
964 TARGET_FLT_EVAL_METHOD
);
966 /* And decfloat.h needs this. */
967 builtin_define_with_int_value ("__DEC_EVAL_METHOD__",
968 TARGET_DEC_EVAL_METHOD
);
970 builtin_define_float_constants ("FLT", "F", "%s", "F", float_type_node
);
971 /* Cast the double precision constants. This is needed when single
972 precision constants are specified or when pragma FLOAT_CONST_DECIMAL64
973 is used. The correct result is computed by the compiler when using
974 macros that include a cast. We use a different cast for C++ to avoid
975 problems with -Wold-style-cast. */
976 builtin_define_float_constants ("DBL", "L",
980 "", double_type_node
);
981 builtin_define_float_constants ("LDBL", "L", "%s", "L",
982 long_double_type_node
);
984 /* For decfloat.h. */
985 builtin_define_decimal_float_constants ("DEC32", "DF", dfloat32_type_node
);
986 builtin_define_decimal_float_constants ("DEC64", "DD", dfloat64_type_node
);
987 builtin_define_decimal_float_constants ("DEC128", "DL", dfloat128_type_node
);
989 /* For fixed-point fibt, ibit, max, min, and epsilon. */
990 if (targetm
.fixed_point_supported_p ())
992 builtin_define_fixed_point_constants ("SFRACT", "HR",
993 short_fract_type_node
);
994 builtin_define_fixed_point_constants ("USFRACT", "UHR",
995 unsigned_short_fract_type_node
);
996 builtin_define_fixed_point_constants ("FRACT", "R",
998 builtin_define_fixed_point_constants ("UFRACT", "UR",
999 unsigned_fract_type_node
);
1000 builtin_define_fixed_point_constants ("LFRACT", "LR",
1001 long_fract_type_node
);
1002 builtin_define_fixed_point_constants ("ULFRACT", "ULR",
1003 unsigned_long_fract_type_node
);
1004 builtin_define_fixed_point_constants ("LLFRACT", "LLR",
1005 long_long_fract_type_node
);
1006 builtin_define_fixed_point_constants ("ULLFRACT", "ULLR",
1007 unsigned_long_long_fract_type_node
);
1008 builtin_define_fixed_point_constants ("SACCUM", "HK",
1009 short_accum_type_node
);
1010 builtin_define_fixed_point_constants ("USACCUM", "UHK",
1011 unsigned_short_accum_type_node
);
1012 builtin_define_fixed_point_constants ("ACCUM", "K",
1014 builtin_define_fixed_point_constants ("UACCUM", "UK",
1015 unsigned_accum_type_node
);
1016 builtin_define_fixed_point_constants ("LACCUM", "LK",
1017 long_accum_type_node
);
1018 builtin_define_fixed_point_constants ("ULACCUM", "ULK",
1019 unsigned_long_accum_type_node
);
1020 builtin_define_fixed_point_constants ("LLACCUM", "LLK",
1021 long_long_accum_type_node
);
1022 builtin_define_fixed_point_constants ("ULLACCUM", "ULLK",
1023 unsigned_long_long_accum_type_node
);
1025 builtin_define_fixed_point_constants ("QQ", "", qq_type_node
);
1026 builtin_define_fixed_point_constants ("HQ", "", hq_type_node
);
1027 builtin_define_fixed_point_constants ("SQ", "", sq_type_node
);
1028 builtin_define_fixed_point_constants ("DQ", "", dq_type_node
);
1029 builtin_define_fixed_point_constants ("TQ", "", tq_type_node
);
1030 builtin_define_fixed_point_constants ("UQQ", "", uqq_type_node
);
1031 builtin_define_fixed_point_constants ("UHQ", "", uhq_type_node
);
1032 builtin_define_fixed_point_constants ("USQ", "", usq_type_node
);
1033 builtin_define_fixed_point_constants ("UDQ", "", udq_type_node
);
1034 builtin_define_fixed_point_constants ("UTQ", "", utq_type_node
);
1035 builtin_define_fixed_point_constants ("HA", "", ha_type_node
);
1036 builtin_define_fixed_point_constants ("SA", "", sa_type_node
);
1037 builtin_define_fixed_point_constants ("DA", "", da_type_node
);
1038 builtin_define_fixed_point_constants ("TA", "", ta_type_node
);
1039 builtin_define_fixed_point_constants ("UHA", "", uha_type_node
);
1040 builtin_define_fixed_point_constants ("USA", "", usa_type_node
);
1041 builtin_define_fixed_point_constants ("UDA", "", uda_type_node
);
1042 builtin_define_fixed_point_constants ("UTA", "", uta_type_node
);
1045 /* For libgcc-internal use only. */
1046 if (flag_building_libgcc
)
1048 /* Properties of floating-point modes for libgcc2.c. */
1049 for (machine_mode mode
= GET_CLASS_NARROWEST_MODE (MODE_FLOAT
);
1051 mode
= GET_MODE_WIDER_MODE (mode
))
1053 const char *name
= GET_MODE_NAME (mode
);
1055 = (char *) alloca (strlen (name
)
1056 + sizeof ("__LIBGCC__MANT_DIG__"));
1057 sprintf (macro_name
, "__LIBGCC_%s_MANT_DIG__", name
);
1058 builtin_define_with_int_value (macro_name
,
1059 REAL_MODE_FORMAT (mode
)->p
);
1060 if (!targetm
.scalar_mode_supported_p (mode
)
1061 || !targetm
.libgcc_floating_mode_supported_p (mode
))
1063 macro_name
= (char *) alloca (strlen (name
)
1064 + sizeof ("__LIBGCC_HAS__MODE__"));
1065 sprintf (macro_name
, "__LIBGCC_HAS_%s_MODE__", name
);
1066 cpp_define (pfile
, macro_name
);
1067 macro_name
= (char *) alloca (strlen (name
)
1068 + sizeof ("__LIBGCC__FUNC_EXT__"));
1069 sprintf (macro_name
, "__LIBGCC_%s_FUNC_EXT__", name
);
1071 if (mode
== TYPE_MODE (double_type_node
))
1073 else if (mode
== TYPE_MODE (float_type_node
))
1075 else if (mode
== TYPE_MODE (long_double_type_node
))
1077 /* ??? The following assumes the built-in functions (defined
1078 in target-specific code) match the suffixes used for
1079 constants. Because in fact such functions are not
1080 defined for the 'w' suffix, 'l' is used there
1082 else if (mode
== targetm
.c
.mode_for_suffix ('q'))
1084 else if (mode
== targetm
.c
.mode_for_suffix ('w'))
1088 builtin_define_with_value (macro_name
, suffix
, 0);
1089 bool excess_precision
= false;
1090 if (TARGET_FLT_EVAL_METHOD
!= 0
1091 && mode
!= TYPE_MODE (long_double_type_node
)
1092 && (mode
== TYPE_MODE (float_type_node
)
1093 || mode
== TYPE_MODE (double_type_node
)))
1094 switch (TARGET_FLT_EVAL_METHOD
)
1098 excess_precision
= true;
1102 excess_precision
= mode
== TYPE_MODE (float_type_node
);
1108 macro_name
= (char *) alloca (strlen (name
)
1109 + sizeof ("__LIBGCC__EXCESS_"
1111 sprintf (macro_name
, "__LIBGCC_%s_EXCESS_PRECISION__", name
);
1112 builtin_define_with_int_value (macro_name
, excess_precision
);
1115 /* For libgcc crtstuff.c and libgcc2.c. */
1116 builtin_define_with_int_value ("__LIBGCC_EH_TABLES_CAN_BE_READ_ONLY__",
1117 EH_TABLES_CAN_BE_READ_ONLY
);
1118 #ifdef EH_FRAME_SECTION_NAME
1119 builtin_define_with_value ("__LIBGCC_EH_FRAME_SECTION_NAME__",
1120 EH_FRAME_SECTION_NAME
, 1);
1122 #ifdef JCR_SECTION_NAME
1123 builtin_define_with_value ("__LIBGCC_JCR_SECTION_NAME__",
1124 JCR_SECTION_NAME
, 1);
1126 #ifdef CTORS_SECTION_ASM_OP
1127 builtin_define_with_value ("__LIBGCC_CTORS_SECTION_ASM_OP__",
1128 CTORS_SECTION_ASM_OP
, 1);
1130 #ifdef DTORS_SECTION_ASM_OP
1131 builtin_define_with_value ("__LIBGCC_DTORS_SECTION_ASM_OP__",
1132 DTORS_SECTION_ASM_OP
, 1);
1134 #ifdef TEXT_SECTION_ASM_OP
1135 builtin_define_with_value ("__LIBGCC_TEXT_SECTION_ASM_OP__",
1136 TEXT_SECTION_ASM_OP
, 1);
1138 #ifdef INIT_SECTION_ASM_OP
1139 builtin_define_with_value ("__LIBGCC_INIT_SECTION_ASM_OP__",
1140 INIT_SECTION_ASM_OP
, 1);
1142 #ifdef INIT_ARRAY_SECTION_ASM_OP
1143 /* Despite the name of this target macro, the expansion is not
1144 actually used, and may be empty rather than a string
1146 cpp_define (pfile
, "__LIBGCC_INIT_ARRAY_SECTION_ASM_OP__");
1149 /* For libgcc enable-execute-stack.c. */
1150 builtin_define_with_int_value ("__LIBGCC_TRAMPOLINE_SIZE__",
1153 /* For libgcc generic-morestack.c and unwinder code. */
1154 if (STACK_GROWS_DOWNWARD
)
1155 cpp_define (pfile
, "__LIBGCC_STACK_GROWS_DOWNWARD__");
1157 /* For libgcc unwinder code. */
1158 #ifdef DONT_USE_BUILTIN_SETJMP
1159 cpp_define (pfile
, "__LIBGCC_DONT_USE_BUILTIN_SETJMP__");
1161 #ifdef DWARF_ALT_FRAME_RETURN_COLUMN
1162 builtin_define_with_int_value ("__LIBGCC_DWARF_ALT_FRAME_RETURN_COLUMN__",
1163 DWARF_ALT_FRAME_RETURN_COLUMN
);
1165 builtin_define_with_int_value ("__LIBGCC_DWARF_FRAME_REGISTERS__",
1166 DWARF_FRAME_REGISTERS
);
1167 #ifdef EH_RETURN_STACKADJ_RTX
1168 cpp_define (pfile
, "__LIBGCC_EH_RETURN_STACKADJ_RTX__");
1171 builtin_define_with_int_value ("__LIBGCC_JMP_BUF_SIZE__",
1174 builtin_define_with_int_value ("__LIBGCC_STACK_POINTER_REGNUM__",
1175 STACK_POINTER_REGNUM
);
1178 builtin_define_with_int_value ("__LIBGCC_VTABLE_USES_DESCRIPTORS__",
1179 TARGET_VTABLE_USES_DESCRIPTORS
);
1182 /* For use in assembly language. */
1183 builtin_define_with_value ("__REGISTER_PREFIX__", REGISTER_PREFIX
, 0);
1184 builtin_define_with_value ("__USER_LABEL_PREFIX__", user_label_prefix
, 0);
1187 if (flag_gnu89_inline
)
1188 cpp_define (pfile
, "__GNUC_GNU_INLINE__");
1190 cpp_define (pfile
, "__GNUC_STDC_INLINE__");
1193 cpp_define (pfile
, "__NO_INLINE__");
1196 cpp_define (pfile
, "__STRICT_ANSI__");
1198 if (!flag_signed_char
)
1199 cpp_define (pfile
, "__CHAR_UNSIGNED__");
1201 if (c_dialect_cxx () && TYPE_UNSIGNED (wchar_type_node
))
1202 cpp_define (pfile
, "__WCHAR_UNSIGNED__");
1204 cpp_atomic_builtins (pfile
);
1206 #ifdef DWARF2_UNWIND_INFO
1207 if (dwarf2out_do_cfi_asm ())
1208 cpp_define (pfile
, "__GCC_HAVE_DWARF2_CFI_ASM");
1211 /* Make the choice of ObjC runtime visible to source code. */
1212 if (c_dialect_objc () && flag_next_runtime
)
1213 cpp_define (pfile
, "__NEXT_RUNTIME__");
1215 /* Show the availability of some target pragmas. */
1216 cpp_define (pfile
, "__PRAGMA_REDEFINE_EXTNAME");
1218 /* Make the choice of the stack protector runtime visible to source code.
1219 The macro names and values here were chosen for compatibility with an
1220 earlier implementation, i.e. ProPolice. */
1221 if (flag_stack_protect
== 4)
1222 cpp_define (pfile
, "__SSP_EXPLICIT__=4");
1223 if (flag_stack_protect
== 3)
1224 cpp_define (pfile
, "__SSP_STRONG__=3");
1225 if (flag_stack_protect
== 2)
1226 cpp_define (pfile
, "__SSP_ALL__=2");
1227 else if (flag_stack_protect
== 1)
1228 cpp_define (pfile
, "__SSP__=1");
1231 cpp_define (pfile
, "_OPENACC=201306");
1234 cpp_define (pfile
, "_OPENMP=201511");
1236 for (i
= 0; i
< NUM_INT_N_ENTS
; i
++)
1237 if (int_n_enabled_p
[i
])
1240 sprintf(buf
, "__SIZEOF_INT%d__", int_n_data
[i
].bitsize
);
1241 builtin_define_type_sizeof (buf
,
1242 int_n_trees
[i
].signed_type
);
1244 builtin_define_type_sizeof ("__SIZEOF_WCHAR_T__", wchar_type_node
);
1245 builtin_define_type_sizeof ("__SIZEOF_WINT_T__", wint_type_node
);
1246 builtin_define_type_sizeof ("__SIZEOF_PTRDIFF_T__",
1247 unsigned_ptrdiff_type_node
);
1249 /* A straightforward target hook doesn't work, because of problems
1250 linking that hook's body when part of non-C front ends. */
1251 # define preprocessing_asm_p() (cpp_get_options (pfile)->lang == CLK_ASM)
1252 # define preprocessing_trad_p() (cpp_get_options (pfile)->traditional)
1253 # define builtin_define(TXT) cpp_define (pfile, TXT)
1254 # define builtin_assert(TXT) cpp_assert (pfile, TXT)
1255 TARGET_CPU_CPP_BUILTINS ();
1256 TARGET_OS_CPP_BUILTINS ();
1257 TARGET_OBJFMT_CPP_BUILTINS ();
1259 /* Support the __declspec keyword by turning them into attributes.
1260 Note that the current way we do this may result in a collision
1261 with predefined attributes later on. This can be solved by using
1262 one attribute, say __declspec__, and passing args to it. The
1263 problem with that approach is that args are not accumulated: each
1264 new appearance would clobber any existing args. */
1265 if (TARGET_DECLSPEC
)
1266 builtin_define ("__declspec(x)=__attribute__((x))");
1268 /* If decimal floating point is supported, tell the user if the
1269 alternate format (BID) is used instead of the standard (DPD)
1271 if (ENABLE_DECIMAL_FLOAT
&& ENABLE_DECIMAL_BID_FORMAT
)
1272 cpp_define (pfile
, "__DECIMAL_BID_FORMAT__");
1275 /* Pass an object-like macro. If it doesn't lie in the user's
1276 namespace, defines it unconditionally. Otherwise define a version
1277 with two leading underscores, and another version with two leading
1278 and trailing underscores, and define the original only if an ISO
1279 standard was not nominated.
1281 e.g. passing "unix" defines "__unix", "__unix__" and possibly
1282 "unix". Passing "_mips" defines "__mips", "__mips__" and possibly
1285 builtin_define_std (const char *macro
)
1287 size_t len
= strlen (macro
);
1288 char *buff
= (char *) alloca (len
+ 5);
1292 /* prepend __ (or maybe just _) if in user's namespace. */
1293 memcpy (p
, macro
, len
+ 1);
1294 if (!( *p
== '_' && (p
[1] == '_' || ISUPPER (p
[1]))))
1301 cpp_define (parse_in
, p
);
1303 /* If it was in user's namespace... */
1306 /* Define the macro with leading and following __. */
1312 cpp_define (parse_in
, p
);
1314 /* Finally, define the original macro if permitted. */
1316 cpp_define (parse_in
, macro
);
1320 /* Pass an object-like macro and a value to define it to. The third
1321 parameter says whether or not to turn the value into a string
1324 builtin_define_with_value (const char *macro
, const char *expansion
, int is_str
)
1327 size_t mlen
= strlen (macro
);
1328 size_t elen
= strlen (expansion
);
1329 size_t extra
= 2; /* space for an = and a NUL */
1333 char *quoted_expansion
= (char *) alloca (elen
* 4 + 1);
1336 extra
+= 2; /* space for two quote marks */
1337 for (p
= expansion
, q
= quoted_expansion
; *p
; p
++)
1362 if (ISPRINT ((unsigned char) *p
))
1366 sprintf (q
, "\\%03o", (unsigned char) *p
);
1372 expansion
= quoted_expansion
;
1373 elen
= q
- expansion
;
1376 buf
= (char *) alloca (mlen
+ elen
+ extra
);
1378 sprintf (buf
, "%s=\"%s\"", macro
, expansion
);
1380 sprintf (buf
, "%s=%s", macro
, expansion
);
1382 cpp_define (parse_in
, buf
);
1386 /* Pass an object-like macro and an integer value to define it to. */
1388 builtin_define_with_int_value (const char *macro
, HOST_WIDE_INT value
)
1391 size_t mlen
= strlen (macro
);
1393 size_t extra
= 2; /* space for = and NUL. */
1395 buf
= (char *) alloca (mlen
+ vlen
+ extra
);
1396 memcpy (buf
, macro
, mlen
);
1398 sprintf (buf
+ mlen
+ 1, HOST_WIDE_INT_PRINT_DEC
, value
);
1400 cpp_define (parse_in
, buf
);
1403 /* builtin_define_with_hex_fp_value is very expensive, so the following
1404 array and function allows it to be done lazily when __DBL_MAX__
1405 etc. is first used. */
1407 struct GTY(()) lazy_hex_fp_value_struct
1409 const char *hex_str
;
1413 const char *fp_suffix
;
1415 static GTY(()) struct lazy_hex_fp_value_struct lazy_hex_fp_values
[12];
1416 static GTY(()) int lazy_hex_fp_value_count
;
1419 lazy_hex_fp_value (cpp_reader
*pfile ATTRIBUTE_UNUSED
,
1422 REAL_VALUE_TYPE real
;
1423 char dec_str
[64], buf1
[256];
1425 if (node
->value
.builtin
< BT_FIRST_USER
1426 || (int) node
->value
.builtin
>= BT_FIRST_USER
+ lazy_hex_fp_value_count
)
1429 idx
= node
->value
.builtin
- BT_FIRST_USER
;
1430 real_from_string (&real
, lazy_hex_fp_values
[idx
].hex_str
);
1431 real_to_decimal_for_mode (dec_str
, &real
, sizeof (dec_str
),
1432 lazy_hex_fp_values
[idx
].digits
, 0,
1433 lazy_hex_fp_values
[idx
].mode
);
1435 sprintf (buf1
, "%s%s", dec_str
, lazy_hex_fp_values
[idx
].fp_suffix
);
1436 node
->flags
&= ~(NODE_BUILTIN
| NODE_USED
);
1437 node
->value
.macro
= lazy_hex_fp_values
[idx
].macro
;
1438 for (idx
= 0; idx
< node
->value
.macro
->count
; idx
++)
1439 if (node
->value
.macro
->exp
.tokens
[idx
].type
== CPP_NUMBER
)
1441 gcc_assert (idx
< node
->value
.macro
->count
);
1442 node
->value
.macro
->exp
.tokens
[idx
].val
.str
.len
= strlen (buf1
);
1443 node
->value
.macro
->exp
.tokens
[idx
].val
.str
.text
1444 = (const unsigned char *) ggc_strdup (buf1
);
1448 /* Pass an object-like macro a hexadecimal floating-point value. */
1450 builtin_define_with_hex_fp_value (const char *macro
,
1451 tree type
, int digits
,
1452 const char *hex_str
,
1453 const char *fp_suffix
,
1454 const char *fp_cast
)
1456 REAL_VALUE_TYPE real
;
1457 char dec_str
[64], buf1
[256], buf2
[256];
1459 /* This is very expensive, so if possible expand them lazily. */
1460 if (lazy_hex_fp_value_count
< 12
1461 && flag_dump_macros
== 0
1462 && !cpp_get_options (parse_in
)->traditional
)
1464 struct cpp_hashnode
*node
;
1465 if (lazy_hex_fp_value_count
== 0)
1466 cpp_get_callbacks (parse_in
)->user_builtin_macro
= lazy_hex_fp_value
;
1467 sprintf (buf2
, fp_cast
, "1.1");
1468 sprintf (buf1
, "%s=%s", macro
, buf2
);
1469 cpp_define (parse_in
, buf1
);
1470 node
= C_CPP_HASHNODE (get_identifier (macro
));
1471 lazy_hex_fp_values
[lazy_hex_fp_value_count
].hex_str
1472 = ggc_strdup (hex_str
);
1473 lazy_hex_fp_values
[lazy_hex_fp_value_count
].mode
= TYPE_MODE (type
);
1474 lazy_hex_fp_values
[lazy_hex_fp_value_count
].digits
= digits
;
1475 lazy_hex_fp_values
[lazy_hex_fp_value_count
].fp_suffix
= fp_suffix
;
1476 lazy_hex_fp_values
[lazy_hex_fp_value_count
].macro
= node
->value
.macro
;
1477 node
->flags
|= NODE_BUILTIN
;
1479 = (enum cpp_builtin_type
) (BT_FIRST_USER
+ lazy_hex_fp_value_count
);
1480 lazy_hex_fp_value_count
++;
1484 /* Hex values are really cool and convenient, except that they're
1485 not supported in strict ISO C90 mode. First, the "p-" sequence
1486 is not valid as part of a preprocessor number. Second, we get a
1487 pedwarn from the preprocessor, which has no context, so we can't
1488 suppress the warning with __extension__.
1490 So instead what we do is construct the number in hex (because
1491 it's easy to get the exact correct value), parse it as a real,
1492 then print it back out as decimal. */
1494 real_from_string (&real
, hex_str
);
1495 real_to_decimal_for_mode (dec_str
, &real
, sizeof (dec_str
), digits
, 0,
1498 /* Assemble the macro in the following fashion
1499 macro = fp_cast [dec_str fp_suffix] */
1500 sprintf (buf1
, "%s%s", dec_str
, fp_suffix
);
1501 sprintf (buf2
, fp_cast
, buf1
);
1502 sprintf (buf1
, "%s=%s", macro
, buf2
);
1504 cpp_define (parse_in
, buf1
);
1507 /* Return a string constant for the suffix for a value of type TYPE
1508 promoted according to the integer promotions. The type must be one
1509 of the standard integer type nodes. */
1512 type_suffix (tree type
)
1514 static const char *const suffixes
[] = { "", "U", "L", "UL", "LL", "ULL" };
1515 int unsigned_suffix
;
1517 int tp
= TYPE_PRECISION (type
);
1519 if (type
== long_long_integer_type_node
1520 || type
== long_long_unsigned_type_node
1521 || tp
> TYPE_PRECISION (long_integer_type_node
))
1523 else if (type
== long_integer_type_node
1524 || type
== long_unsigned_type_node
1525 || tp
> TYPE_PRECISION (integer_type_node
))
1527 else if (type
== integer_type_node
1528 || type
== unsigned_type_node
1529 || type
== short_integer_type_node
1530 || type
== short_unsigned_type_node
1531 || type
== signed_char_type_node
1532 || type
== unsigned_char_type_node
1533 /* ??? "char" is not a signed or unsigned integer type and
1534 so is not permitted for the standard typedefs, but some
1535 systems use it anyway. */
1536 || type
== char_type_node
)
1541 unsigned_suffix
= TYPE_UNSIGNED (type
);
1542 if (TYPE_PRECISION (type
) < TYPE_PRECISION (integer_type_node
))
1543 unsigned_suffix
= 0;
1544 return suffixes
[is_long
* 2 + unsigned_suffix
];
1547 /* Define MACRO as a <stdint.h> constant-suffix macro for TYPE. */
1549 builtin_define_constants (const char *macro
, tree type
)
1554 suffix
= type_suffix (type
);
1558 buf
= (char *) alloca (strlen (macro
) + 6);
1559 sprintf (buf
, "%s(c)=c", macro
);
1563 buf
= (char *) alloca (strlen (macro
) + 9 + strlen (suffix
) + 1);
1564 sprintf (buf
, "%s(c)=c ## %s", macro
, suffix
);
1567 cpp_define (parse_in
, buf
);
1570 /* Define MAX for TYPE based on the precision of the type. */
1573 builtin_define_type_max (const char *macro
, tree type
)
1575 builtin_define_type_minmax (NULL
, macro
, type
);
1578 /* Given a value with COUNT LSBs set, fill BUF with a hexidecimal
1579 representation of that value. For example, a COUNT of 10 would
1583 print_bits_of_hex (char *buf
, int bufsz
, int count
)
1585 gcc_assert (bufsz
> 3);
1590 gcc_assert (count
> 0);
1592 switch (count
% 4) {
1613 gcc_assert (bufsz
> 1);
1618 gcc_assert (bufsz
> 0);
1622 /* Define MIN_MACRO (if not NULL) and MAX_MACRO for TYPE based on the
1623 precision of the type. */
1626 builtin_define_type_minmax (const char *min_macro
, const char *max_macro
,
1629 #define PBOH_SZ (MAX_BITSIZE_MODE_ANY_INT/4+4)
1630 char value
[PBOH_SZ
];
1636 bits
= TYPE_PRECISION (type
) + (TYPE_UNSIGNED (type
) ? 0 : -1);
1638 print_bits_of_hex (value
, PBOH_SZ
, bits
);
1640 suffix
= type_suffix (type
);
1642 buf
= (char *) alloca (strlen (max_macro
) + 1 + strlen (value
)
1643 + strlen (suffix
) + 1);
1644 sprintf (buf
, "%s=%s%s", max_macro
, value
, suffix
);
1646 cpp_define (parse_in
, buf
);
1650 if (TYPE_UNSIGNED (type
))
1652 buf
= (char *) alloca (strlen (min_macro
) + 2 + strlen (suffix
) + 1);
1653 sprintf (buf
, "%s=0%s", min_macro
, suffix
);
1657 buf
= (char *) alloca (strlen (min_macro
) + 3
1658 + strlen (max_macro
) + 6);
1659 sprintf (buf
, "%s=(-%s - 1)", min_macro
, max_macro
);
1661 cpp_define (parse_in
, buf
);
1665 #include "gt-c-family-c-cppbuiltin.h"