1 /* Define builtin-in macros for the C family front ends.
2 Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011
3 Free Software Foundation, Inc.
5 This file is part of GCC.
7 GCC is free software; you can redistribute it and/or modify it under
8 the terms of the GNU General Public License as published by the Free
9 Software Foundation; either version 3, or (at your option) any later
12 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
13 WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
17 You should have received a copy of the GNU General Public License
18 along with GCC; see the file COPYING3. If not see
19 <http://www.gnu.org/licenses/>. */
23 #include "coretypes.h"
31 #include "debug.h" /* For dwarf2out_do_cfi_asm. */
32 #include "tm_p.h" /* For TARGET_CPU_CPP_BUILTINS & friends. */
34 #include "common/common-target.h"
35 #include "cpp-id-data.h"
36 #include "cppbuiltin.h"
38 #ifndef TARGET_OS_CPP_BUILTINS
39 # define TARGET_OS_CPP_BUILTINS()
42 #ifndef TARGET_OBJFMT_CPP_BUILTINS
43 # define TARGET_OBJFMT_CPP_BUILTINS()
46 #ifndef REGISTER_PREFIX
47 #define REGISTER_PREFIX ""
50 /* Non-static as some targets don't use it. */
51 void builtin_define_std (const char *) ATTRIBUTE_UNUSED;
52 static void builtin_define_with_int_value (const char *, HOST_WIDE_INT);
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_type_sizeof (const char *, tree);
62 static void builtin_define_float_constants (const char *,
68 /* Return true if MODE provides a fast multiply/add (FMA) builtin function.
69 Originally this function used the fma optab, but that doesn't work with
70 -save-temps, so just rely on the HAVE_fma macros for the standard floating
74 mode_has_fma (enum machine_mode mode)
105 /* Define NAME with value TYPE size_unit. */
107 builtin_define_type_sizeof (const char *name, tree type)
109 builtin_define_with_int_value (name,
110 tree_low_cst (TYPE_SIZE_UNIT (type), 1));
113 /* Define the float.h constants for TYPE using NAME_PREFIX, FP_SUFFIX,
116 builtin_define_float_constants (const char *name_prefix,
117 const char *fp_suffix,
119 const char *fma_suffix,
122 /* Used to convert radix-based values to base 10 values in several cases.
124 In the max_exp -> max_10_exp conversion for 128-bit IEEE, we need at
125 least 6 significant digits for correct results. Using the fraction
126 formed by (log(2)*1e6)/(log(10)*1e6) overflows a 32-bit integer as an
127 intermediate; perhaps someone can find a better approximation, in the
128 mean time, I suspect using doubles won't harm the bootstrap here. */
130 const double log10_2 = .30102999566398119521;
132 const struct real_format *fmt;
133 const struct real_format *ldfmt;
135 char name[64], buf[128];
136 int dig, min_10_exp, max_10_exp;
138 int type_decimal_dig;
140 fmt = REAL_MODE_FORMAT (TYPE_MODE (type));
141 gcc_assert (fmt->b != 10);
142 ldfmt = REAL_MODE_FORMAT (TYPE_MODE (long_double_type_node));
143 gcc_assert (ldfmt->b != 10);
145 /* The radix of the exponent representation. */
146 if (type == float_type_node)
147 builtin_define_with_int_value ("__FLT_RADIX__", fmt->b);
150 /* The number of radix digits, p, in the floating-point significand. */
151 sprintf (name, "__%s_MANT_DIG__", name_prefix);
152 builtin_define_with_int_value (name, fmt->p);
154 /* The number of decimal digits, q, such that any floating-point number
155 with q decimal digits can be rounded into a floating-point number with
156 p radix b digits and back again without change to the q decimal digits,
158 p log10 b if b is a power of 10
159 floor((p - 1) log10 b) otherwise
161 dig = (fmt->p - 1) * log10_b;
162 sprintf (name, "__%s_DIG__", name_prefix);
163 builtin_define_with_int_value (name, dig);
165 /* The minimum negative int x such that b**(x-1) is a normalized float. */
166 sprintf (name, "__%s_MIN_EXP__", name_prefix);
167 sprintf (buf, "(%d)", fmt->emin);
168 builtin_define_with_value (name, buf, 0);
170 /* The minimum negative int x such that 10**x is a normalized float,
172 ceil (log10 (b ** (emin - 1)))
173 = ceil (log10 (b) * (emin - 1))
175 Recall that emin is negative, so the integer truncation calculates
176 the ceiling, not the floor, in this case. */
177 min_10_exp = (fmt->emin - 1) * log10_b;
178 sprintf (name, "__%s_MIN_10_EXP__", name_prefix);
179 sprintf (buf, "(%d)", min_10_exp);
180 builtin_define_with_value (name, buf, 0);
182 /* The maximum int x such that b**(x-1) is a representable float. */
183 sprintf (name, "__%s_MAX_EXP__", name_prefix);
184 builtin_define_with_int_value (name, fmt->emax);
186 /* The maximum int x such that 10**x is in the range of representable
187 finite floating-point numbers,
189 floor (log10((1 - b**-p) * b**emax))
190 = floor (log10(1 - b**-p) + log10(b**emax))
191 = floor (log10(1 - b**-p) + log10(b)*emax)
193 The safest thing to do here is to just compute this number. But since
194 we don't link cc1 with libm, we cannot. We could implement log10 here
195 a series expansion, but that seems too much effort because:
197 Note that the first term, for all extant p, is a number exceedingly close
198 to zero, but slightly negative. Note that the second term is an integer
199 scaling an irrational number, and that because of the floor we are only
200 interested in its integral portion.
202 In order for the first term to have any effect on the integral portion
203 of the second term, the second term has to be exceedingly close to an
204 integer itself (e.g. 123.000000000001 or something). Getting a result
205 that close to an integer requires that the irrational multiplicand have
206 a long series of zeros in its expansion, which doesn't occur in the
207 first 20 digits or so of log10(b).
209 Hand-waving aside, crunching all of the sets of constants above by hand
210 does not yield a case for which the first term is significant, which
211 in the end is all that matters. */
212 max_10_exp = fmt->emax * log10_b;
213 sprintf (name, "__%s_MAX_10_EXP__", name_prefix);
214 builtin_define_with_int_value (name, max_10_exp);
216 /* The number of decimal digits, n, such that any floating-point number
217 can be rounded to n decimal digits and back again without change to
220 p * log10(b) if b is a power of 10
221 ceil(1 + p * log10(b)) otherwise
223 The only macro we care about is this number for the widest supported
224 floating type, but we want this value for rendering constants below. */
227 = 1 + (fmt->p < ldfmt->p ? ldfmt->p : fmt->p) * log10_b;
228 decimal_dig = d_decimal_dig;
229 if (decimal_dig < d_decimal_dig)
232 /* Similar, for this type rather than long double. */
234 double type_d_decimal_dig = 1 + fmt->p * log10_b;
235 type_decimal_dig = type_d_decimal_dig;
236 if (type_decimal_dig < type_d_decimal_dig)
239 if (type == long_double_type_node)
240 builtin_define_with_int_value ("__DECIMAL_DIG__", decimal_dig);
243 sprintf (name, "__%s_DECIMAL_DIG__", name_prefix);
244 builtin_define_with_int_value (name, type_decimal_dig);
247 /* Since, for the supported formats, B is always a power of 2, we
248 construct the following numbers directly as a hexadecimal
250 get_max_float (fmt, buf, sizeof (buf));
252 sprintf (name, "__%s_MAX__", name_prefix);
253 builtin_define_with_hex_fp_value (name, type, decimal_dig, buf, fp_suffix, fp_cast);
255 /* The minimum normalized positive floating-point number,
257 sprintf (name, "__%s_MIN__", name_prefix);
258 sprintf (buf, "0x1p%d", fmt->emin - 1);
259 builtin_define_with_hex_fp_value (name, type, decimal_dig, buf, fp_suffix, fp_cast);
261 /* The difference between 1 and the least value greater than 1 that is
262 representable in the given floating point type, b**(1-p). */
263 sprintf (name, "__%s_EPSILON__", name_prefix);
264 if (fmt->pnan < fmt->p)
265 /* This is an IBM extended double format, so 1.0 + any double is
266 representable precisely. */
267 sprintf (buf, "0x1p%d", fmt->emin - fmt->p);
269 sprintf (buf, "0x1p%d", 1 - fmt->p);
270 builtin_define_with_hex_fp_value (name, type, decimal_dig, buf, fp_suffix, fp_cast);
272 /* For C++ std::numeric_limits<T>::denorm_min. The minimum denormalized
273 positive floating-point number, b**(emin-p). Zero for formats that
274 don't support denormals. */
275 sprintf (name, "__%s_DENORM_MIN__", name_prefix);
278 sprintf (buf, "0x1p%d", fmt->emin - fmt->p);
279 builtin_define_with_hex_fp_value (name, type, decimal_dig,
280 buf, fp_suffix, fp_cast);
284 sprintf (buf, "0.0%s", fp_suffix);
285 builtin_define_with_value (name, buf, 0);
288 sprintf (name, "__%s_HAS_DENORM__", name_prefix);
289 builtin_define_with_value (name, fmt->has_denorm ? "1" : "0", 0);
291 /* For C++ std::numeric_limits<T>::has_infinity. */
292 sprintf (name, "__%s_HAS_INFINITY__", name_prefix);
293 builtin_define_with_int_value (name,
294 MODE_HAS_INFINITIES (TYPE_MODE (type)));
295 /* For C++ std::numeric_limits<T>::has_quiet_NaN. We do not have a
296 predicate to distinguish a target that has both quiet and
297 signalling NaNs from a target that has only quiet NaNs or only
298 signalling NaNs, so we assume that a target that has any kind of
299 NaN has quiet NaNs. */
300 sprintf (name, "__%s_HAS_QUIET_NAN__", name_prefix);
301 builtin_define_with_int_value (name, MODE_HAS_NANS (TYPE_MODE (type)));
303 /* Note whether we have fast FMA. */
304 if (mode_has_fma (TYPE_MODE (type)))
306 sprintf (name, "__FP_FAST_FMA%s", fma_suffix);
307 builtin_define_with_int_value (name, 1);
311 /* Define __DECx__ constants for TYPE using NAME_PREFIX and SUFFIX. */
313 builtin_define_decimal_float_constants (const char *name_prefix,
317 const struct real_format *fmt;
318 char name[64], buf[128], *p;
321 fmt = REAL_MODE_FORMAT (TYPE_MODE (type));
323 /* The number of radix digits, p, in the significand. */
324 sprintf (name, "__%s_MANT_DIG__", name_prefix);
325 builtin_define_with_int_value (name, fmt->p);
327 /* The minimum negative int x such that b**(x-1) is a normalized float. */
328 sprintf (name, "__%s_MIN_EXP__", name_prefix);
329 sprintf (buf, "(%d)", fmt->emin);
330 builtin_define_with_value (name, buf, 0);
332 /* The maximum int x such that b**(x-1) is a representable float. */
333 sprintf (name, "__%s_MAX_EXP__", name_prefix);
334 builtin_define_with_int_value (name, fmt->emax);
336 /* Compute the minimum representable value. */
337 sprintf (name, "__%s_MIN__", name_prefix);
338 sprintf (buf, "1E%d%s", fmt->emin - 1, suffix);
339 builtin_define_with_value (name, buf, 0);
341 /* Compute the maximum representable value. */
342 sprintf (name, "__%s_MAX__", name_prefix);
344 for (digits = fmt->p; digits; digits--)
347 if (digits == fmt->p)
351 /* fmt->p plus 1, to account for the decimal point and fmt->emax
352 minus 1 because the digits are nines, not 1.0. */
353 sprintf (&buf[fmt->p + 1], "E%d%s", fmt->emax - 1, suffix);
354 builtin_define_with_value (name, buf, 0);
356 /* Compute epsilon (the difference between 1 and least value greater
357 than 1 representable). */
358 sprintf (name, "__%s_EPSILON__", name_prefix);
359 sprintf (buf, "1E-%d%s", fmt->p - 1, suffix);
360 builtin_define_with_value (name, buf, 0);
362 /* Minimum subnormal positive decimal value. */
363 sprintf (name, "__%s_SUBNORMAL_MIN__", name_prefix);
365 for (digits = fmt->p; digits > 1; digits--)
368 if (digits == fmt->p)
372 sprintf (&buf[fmt->p], "1E%d%s", fmt->emin - 1, suffix);
373 builtin_define_with_value (name, buf, 0);
376 /* Define fixed-point constants for TYPE using NAME_PREFIX and SUFFIX. */
379 builtin_define_fixed_point_constants (const char *name_prefix,
383 char name[64], buf[256], *new_buf;
386 sprintf (name, "__%s_FBIT__", name_prefix);
387 builtin_define_with_int_value (name, TYPE_FBIT (type));
389 sprintf (name, "__%s_IBIT__", name_prefix);
390 builtin_define_with_int_value (name, TYPE_IBIT (type));
392 /* If there is no suffix, defines are for fixed-point modes.
394 if (strcmp (suffix, "") == 0)
397 if (TYPE_UNSIGNED (type))
399 sprintf (name, "__%s_MIN__", name_prefix);
400 sprintf (buf, "0.0%s", suffix);
401 builtin_define_with_value (name, buf, 0);
405 sprintf (name, "__%s_MIN__", name_prefix);
406 if (ALL_ACCUM_MODE_P (TYPE_MODE (type)))
407 sprintf (buf, "(-0X1P%d%s-0X1P%d%s)", TYPE_IBIT (type) - 1, suffix,
408 TYPE_IBIT (type) - 1, suffix);
410 sprintf (buf, "(-0.5%s-0.5%s)", suffix, suffix);
411 builtin_define_with_value (name, buf, 0);
414 sprintf (name, "__%s_MAX__", name_prefix);
417 mod = (TYPE_FBIT (type) + TYPE_IBIT (type)) % 4;
419 sprintf (new_buf++, "%x", (1 << mod) - 1);
420 for (i = 0; i < (TYPE_FBIT (type) + TYPE_IBIT (type)) / 4; i++)
421 sprintf (new_buf++, "F");
422 sprintf (new_buf, "P-%d%s", TYPE_FBIT (type), suffix);
423 builtin_define_with_value (name, buf, 0);
425 sprintf (name, "__%s_EPSILON__", name_prefix);
426 sprintf (buf, "0x1P-%d%s", TYPE_FBIT (type), suffix);
427 builtin_define_with_value (name, buf, 0);
430 /* Define macros used by <stdint.h>. */
432 builtin_define_stdint_macros (void)
434 builtin_define_type_max ("__INTMAX_MAX__", intmax_type_node);
435 builtin_define_constants ("__INTMAX_C", intmax_type_node);
436 builtin_define_type_max ("__UINTMAX_MAX__", uintmax_type_node);
437 builtin_define_constants ("__UINTMAX_C", uintmax_type_node);
438 if (sig_atomic_type_node)
439 builtin_define_type_minmax ("__SIG_ATOMIC_MIN__", "__SIG_ATOMIC_MAX__",
440 sig_atomic_type_node);
442 builtin_define_type_max ("__INT8_MAX__", int8_type_node);
444 builtin_define_type_max ("__INT16_MAX__", int16_type_node);
446 builtin_define_type_max ("__INT32_MAX__", int32_type_node);
448 builtin_define_type_max ("__INT64_MAX__", int64_type_node);
450 builtin_define_type_max ("__UINT8_MAX__", uint8_type_node);
451 if (uint16_type_node)
452 builtin_define_type_max ("__UINT16_MAX__", uint16_type_node);
453 if (c_uint32_type_node)
454 builtin_define_type_max ("__UINT32_MAX__", c_uint32_type_node);
455 if (c_uint64_type_node)
456 builtin_define_type_max ("__UINT64_MAX__", c_uint64_type_node);
457 if (int_least8_type_node)
459 builtin_define_type_max ("__INT_LEAST8_MAX__", int_least8_type_node);
460 builtin_define_constants ("__INT8_C", int_least8_type_node);
462 if (int_least16_type_node)
464 builtin_define_type_max ("__INT_LEAST16_MAX__", int_least16_type_node);
465 builtin_define_constants ("__INT16_C", int_least16_type_node);
467 if (int_least32_type_node)
469 builtin_define_type_max ("__INT_LEAST32_MAX__", int_least32_type_node);
470 builtin_define_constants ("__INT32_C", int_least32_type_node);
472 if (int_least64_type_node)
474 builtin_define_type_max ("__INT_LEAST64_MAX__", int_least64_type_node);
475 builtin_define_constants ("__INT64_C", int_least64_type_node);
477 if (uint_least8_type_node)
479 builtin_define_type_max ("__UINT_LEAST8_MAX__", uint_least8_type_node);
480 builtin_define_constants ("__UINT8_C", uint_least8_type_node);
482 if (uint_least16_type_node)
484 builtin_define_type_max ("__UINT_LEAST16_MAX__", uint_least16_type_node);
485 builtin_define_constants ("__UINT16_C", uint_least16_type_node);
487 if (uint_least32_type_node)
489 builtin_define_type_max ("__UINT_LEAST32_MAX__", uint_least32_type_node);
490 builtin_define_constants ("__UINT32_C", uint_least32_type_node);
492 if (uint_least64_type_node)
494 builtin_define_type_max ("__UINT_LEAST64_MAX__", uint_least64_type_node);
495 builtin_define_constants ("__UINT64_C", uint_least64_type_node);
497 if (int_fast8_type_node)
498 builtin_define_type_max ("__INT_FAST8_MAX__", int_fast8_type_node);
499 if (int_fast16_type_node)
500 builtin_define_type_max ("__INT_FAST16_MAX__", int_fast16_type_node);
501 if (int_fast32_type_node)
502 builtin_define_type_max ("__INT_FAST32_MAX__", int_fast32_type_node);
503 if (int_fast64_type_node)
504 builtin_define_type_max ("__INT_FAST64_MAX__", int_fast64_type_node);
505 if (uint_fast8_type_node)
506 builtin_define_type_max ("__UINT_FAST8_MAX__", uint_fast8_type_node);
507 if (uint_fast16_type_node)
508 builtin_define_type_max ("__UINT_FAST16_MAX__", uint_fast16_type_node);
509 if (uint_fast32_type_node)
510 builtin_define_type_max ("__UINT_FAST32_MAX__", uint_fast32_type_node);
511 if (uint_fast64_type_node)
512 builtin_define_type_max ("__UINT_FAST64_MAX__", uint_fast64_type_node);
513 if (intptr_type_node)
514 builtin_define_type_max ("__INTPTR_MAX__", intptr_type_node);
515 if (uintptr_type_node)
516 builtin_define_type_max ("__UINTPTR_MAX__", uintptr_type_node);
519 /* Adjust the optimization macros when a #pragma GCC optimization is done to
520 reflect the current level. */
522 c_cpp_builtins_optimize_pragma (cpp_reader *pfile, tree prev_tree,
525 struct cl_optimization *prev = TREE_OPTIMIZATION (prev_tree);
526 struct cl_optimization *cur = TREE_OPTIMIZATION (cur_tree);
530 /* -undef turns off target-specific built-ins. */
534 /* Other target-independent built-ins determined by command-line
536 if (!prev->x_optimize_size && cur->x_optimize_size)
537 cpp_define (pfile, "__OPTIMIZE_SIZE__");
538 else if (prev->x_optimize_size && !cur->x_optimize_size)
539 cpp_undef (pfile, "__OPTIMIZE_SIZE__");
541 if (!prev->x_optimize && cur->x_optimize)
542 cpp_define (pfile, "__OPTIMIZE__");
543 else if (prev->x_optimize && !cur->x_optimize)
544 cpp_undef (pfile, "__OPTIMIZE__");
546 prev_fast_math = fast_math_flags_struct_set_p (prev);
547 cur_fast_math = fast_math_flags_struct_set_p (cur);
548 if (!prev_fast_math && cur_fast_math)
549 cpp_define (pfile, "__FAST_MATH__");
550 else if (prev_fast_math && !cur_fast_math)
551 cpp_undef (pfile, "__FAST_MATH__");
553 if (!prev->x_flag_signaling_nans && cur->x_flag_signaling_nans)
554 cpp_define (pfile, "__SUPPORT_SNAN__");
555 else if (prev->x_flag_signaling_nans && !cur->x_flag_signaling_nans)
556 cpp_undef (pfile, "__SUPPORT_SNAN__");
558 if (!prev->x_flag_finite_math_only && cur->x_flag_finite_math_only)
560 cpp_undef (pfile, "__FINITE_MATH_ONLY__");
561 cpp_define (pfile, "__FINITE_MATH_ONLY__=1");
563 else if (prev->x_flag_finite_math_only && !cur->x_flag_finite_math_only)
565 cpp_undef (pfile, "__FINITE_MATH_ONLY__");
566 cpp_define (pfile, "__FINITE_MATH_ONLY__=0");
571 /* Hook that registers front end and target-specific built-ins. */
573 c_cpp_builtins (cpp_reader *pfile)
575 /* -undef turns off target-specific built-ins. */
579 define_language_independent_builtin_macros (pfile);
581 if (c_dialect_cxx ())
584 parse_basever (&major, NULL, NULL);
585 cpp_define_formatted (pfile, "__GNUG__=%d", major);
588 /* For stddef.h. They require macros defined in c-common.c. */
589 c_stddef_cpp_builtins ();
591 if (c_dialect_cxx ())
593 if (flag_weak && SUPPORTS_ONE_ONLY)
594 cpp_define (pfile, "__GXX_WEAK__=1");
596 cpp_define (pfile, "__GXX_WEAK__=0");
598 cpp_define (pfile, "__DEPRECATED");
600 cpp_define (pfile, "__GXX_RTTI");
601 if (cxx_dialect == cxx0x)
602 cpp_define (pfile, "__GXX_EXPERIMENTAL_CXX0X__");
604 /* Note that we define this for C as well, so that we know if
605 __attribute__((cleanup)) will interface with EH. */
607 cpp_define (pfile, "__EXCEPTIONS");
609 /* Represents the C++ ABI version, always defined so it can be used while
610 preprocessing C and assembler. */
611 if (flag_abi_version == 0)
612 /* Use a very large value so that:
614 #if __GXX_ABI_VERSION >= <value for version X>
616 will work whether the user explicitly says "-fabi-version=x" or
617 "-fabi-version=0". Do not use INT_MAX because that will be
618 different from system to system. */
619 builtin_define_with_int_value ("__GXX_ABI_VERSION", 999999);
620 else if (flag_abi_version == 1)
621 /* Due to a historical accident, this version had the value
623 builtin_define_with_int_value ("__GXX_ABI_VERSION", 102);
625 /* Newer versions have values 1002, 1003, .... */
626 builtin_define_with_int_value ("__GXX_ABI_VERSION",
627 1000 + flag_abi_version);
629 /* libgcc needs to know this. */
630 if (targetm_common.except_unwind_info (&global_options) == UI_SJLJ)
631 cpp_define (pfile, "__USING_SJLJ_EXCEPTIONS__");
633 /* limits.h and stdint.h need to know these. */
634 builtin_define_type_max ("__SCHAR_MAX__", signed_char_type_node);
635 builtin_define_type_max ("__SHRT_MAX__", short_integer_type_node);
636 builtin_define_type_max ("__INT_MAX__", integer_type_node);
637 builtin_define_type_max ("__LONG_MAX__", long_integer_type_node);
638 builtin_define_type_max ("__LONG_LONG_MAX__", long_long_integer_type_node);
639 builtin_define_type_minmax ("__WCHAR_MIN__", "__WCHAR_MAX__",
640 underlying_wchar_type_node);
641 builtin_define_type_minmax ("__WINT_MIN__", "__WINT_MAX__", wint_type_node);
642 builtin_define_type_max ("__PTRDIFF_MAX__", ptrdiff_type_node);
643 builtin_define_type_max ("__SIZE_MAX__", size_type_node);
645 /* stdint.h and the testsuite need to know these. */
646 builtin_define_stdint_macros ();
648 /* float.h needs to know this. */
649 builtin_define_with_int_value ("__FLT_EVAL_METHOD__",
650 TARGET_FLT_EVAL_METHOD);
652 /* And decfloat.h needs this. */
653 builtin_define_with_int_value ("__DEC_EVAL_METHOD__",
654 TARGET_DEC_EVAL_METHOD);
656 builtin_define_float_constants ("FLT", "F", "%s", "F", float_type_node);
657 /* Cast the double precision constants. This is needed when single
658 precision constants are specified or when pragma FLOAT_CONST_DECIMAL64
659 is used. The correct result is computed by the compiler when using
660 macros that include a cast. We use a different cast for C++ to avoid
661 problems with -Wold-style-cast. */
662 builtin_define_float_constants ("DBL", "L",
666 "", double_type_node);
667 builtin_define_float_constants ("LDBL", "L", "%s", "L",
668 long_double_type_node);
670 /* For decfloat.h. */
671 builtin_define_decimal_float_constants ("DEC32", "DF", dfloat32_type_node);
672 builtin_define_decimal_float_constants ("DEC64", "DD", dfloat64_type_node);
673 builtin_define_decimal_float_constants ("DEC128", "DL", dfloat128_type_node);
675 /* For fixed-point fibt, ibit, max, min, and epsilon. */
676 if (targetm.fixed_point_supported_p ())
678 builtin_define_fixed_point_constants ("SFRACT", "HR",
679 short_fract_type_node);
680 builtin_define_fixed_point_constants ("USFRACT", "UHR",
681 unsigned_short_fract_type_node);
682 builtin_define_fixed_point_constants ("FRACT", "R",
684 builtin_define_fixed_point_constants ("UFRACT", "UR",
685 unsigned_fract_type_node);
686 builtin_define_fixed_point_constants ("LFRACT", "LR",
687 long_fract_type_node);
688 builtin_define_fixed_point_constants ("ULFRACT", "ULR",
689 unsigned_long_fract_type_node);
690 builtin_define_fixed_point_constants ("LLFRACT", "LLR",
691 long_long_fract_type_node);
692 builtin_define_fixed_point_constants ("ULLFRACT", "ULLR",
693 unsigned_long_long_fract_type_node);
694 builtin_define_fixed_point_constants ("SACCUM", "HK",
695 short_accum_type_node);
696 builtin_define_fixed_point_constants ("USACCUM", "UHK",
697 unsigned_short_accum_type_node);
698 builtin_define_fixed_point_constants ("ACCUM", "K",
700 builtin_define_fixed_point_constants ("UACCUM", "UK",
701 unsigned_accum_type_node);
702 builtin_define_fixed_point_constants ("LACCUM", "LK",
703 long_accum_type_node);
704 builtin_define_fixed_point_constants ("ULACCUM", "ULK",
705 unsigned_long_accum_type_node);
706 builtin_define_fixed_point_constants ("LLACCUM", "LLK",
707 long_long_accum_type_node);
708 builtin_define_fixed_point_constants ("ULLACCUM", "ULLK",
709 unsigned_long_long_accum_type_node);
711 builtin_define_fixed_point_constants ("QQ", "", qq_type_node);
712 builtin_define_fixed_point_constants ("HQ", "", hq_type_node);
713 builtin_define_fixed_point_constants ("SQ", "", sq_type_node);
714 builtin_define_fixed_point_constants ("DQ", "", dq_type_node);
715 builtin_define_fixed_point_constants ("TQ", "", tq_type_node);
716 builtin_define_fixed_point_constants ("UQQ", "", uqq_type_node);
717 builtin_define_fixed_point_constants ("UHQ", "", uhq_type_node);
718 builtin_define_fixed_point_constants ("USQ", "", usq_type_node);
719 builtin_define_fixed_point_constants ("UDQ", "", udq_type_node);
720 builtin_define_fixed_point_constants ("UTQ", "", utq_type_node);
721 builtin_define_fixed_point_constants ("HA", "", ha_type_node);
722 builtin_define_fixed_point_constants ("SA", "", sa_type_node);
723 builtin_define_fixed_point_constants ("DA", "", da_type_node);
724 builtin_define_fixed_point_constants ("TA", "", ta_type_node);
725 builtin_define_fixed_point_constants ("UHA", "", uha_type_node);
726 builtin_define_fixed_point_constants ("USA", "", usa_type_node);
727 builtin_define_fixed_point_constants ("UDA", "", uda_type_node);
728 builtin_define_fixed_point_constants ("UTA", "", uta_type_node);
731 /* For libgcc-internal use only. */
732 if (flag_building_libgcc)
733 /* For libgcc enable-execute-stack.c. */
734 builtin_define_with_int_value ("__LIBGCC_TRAMPOLINE_SIZE__",
737 /* For use in assembly language. */
738 builtin_define_with_value ("__REGISTER_PREFIX__", REGISTER_PREFIX, 0);
739 builtin_define_with_value ("__USER_LABEL_PREFIX__", user_label_prefix, 0);
742 if (flag_gnu89_inline)
743 cpp_define (pfile, "__GNUC_GNU_INLINE__");
745 cpp_define (pfile, "__GNUC_STDC_INLINE__");
748 cpp_define (pfile, "__NO_INLINE__");
751 cpp_define (pfile, "__STRICT_ANSI__");
753 if (!flag_signed_char)
754 cpp_define (pfile, "__CHAR_UNSIGNED__");
756 if (c_dialect_cxx () && TYPE_UNSIGNED (wchar_type_node))
757 cpp_define (pfile, "__WCHAR_UNSIGNED__");
759 /* Tell source code if the compiler makes sync_compare_and_swap
760 builtins available. */
761 #ifndef HAVE_sync_compare_and_swapqi
762 #define HAVE_sync_compare_and_swapqi 0
764 #ifndef HAVE_atomic_compare_and_swapqi
765 #define HAVE_atomic_compare_and_swapqi 0
767 if (HAVE_sync_compare_and_swapqi || HAVE_atomic_compare_and_swapqi)
768 cpp_define (pfile, "__GCC_HAVE_SYNC_COMPARE_AND_SWAP_1");
770 #ifndef HAVE_sync_compare_and_swaphi
771 #define HAVE_sync_compare_and_swaphi 0
773 #ifndef HAVE_atomic_compare_and_swaphi
774 #define HAVE_atomic_compare_and_swaphi 0
776 if (HAVE_sync_compare_and_swaphi || HAVE_atomic_compare_and_swaphi)
777 cpp_define (pfile, "__GCC_HAVE_SYNC_COMPARE_AND_SWAP_2");
779 #ifndef HAVE_sync_compare_and_swapsi
780 #define HAVE_sync_compare_and_swapsi 0
782 #ifndef HAVE_atomic_compare_and_swapsi
783 #define HAVE_atomic_compare_and_swapsi 0
785 if (HAVE_sync_compare_and_swapsi || HAVE_atomic_compare_and_swapsi)
786 cpp_define (pfile, "__GCC_HAVE_SYNC_COMPARE_AND_SWAP_4");
788 #ifndef HAVE_sync_compare_and_swapdi
789 #define HAVE_sync_compare_and_swapdi 0
791 #ifndef HAVE_atomic_compare_and_swapdi
792 #define HAVE_atomic_compare_and_swapdi 0
794 if (HAVE_sync_compare_and_swapdi || HAVE_atomic_compare_and_swapdi)
795 cpp_define (pfile, "__GCC_HAVE_SYNC_COMPARE_AND_SWAP_8");
797 #ifndef HAVE_sync_compare_and_swapti
798 #define HAVE_sync_compare_and_swapti 0
800 #ifndef HAVE_atomic_compare_and_swapti
801 #define HAVE_atomic_compare_and_swapti 0
803 if (HAVE_sync_compare_and_swapti || HAVE_atomic_compare_and_swapti)
804 cpp_define (pfile, "__GCC_HAVE_SYNC_COMPARE_AND_SWAP_16");
806 #ifdef DWARF2_UNWIND_INFO
807 if (dwarf2out_do_cfi_asm ())
808 cpp_define (pfile, "__GCC_HAVE_DWARF2_CFI_ASM");
811 /* Make the choice of ObjC runtime visible to source code. */
812 if (c_dialect_objc () && flag_next_runtime)
813 cpp_define (pfile, "__NEXT_RUNTIME__");
815 /* Show the availability of some target pragmas. */
816 cpp_define (pfile, "__PRAGMA_REDEFINE_EXTNAME");
818 if (targetm.handle_pragma_extern_prefix)
819 cpp_define (pfile, "__PRAGMA_EXTERN_PREFIX");
821 /* Make the choice of the stack protector runtime visible to source code.
822 The macro names and values here were chosen for compatibility with an
823 earlier implementation, i.e. ProPolice. */
824 if (flag_stack_protect == 2)
825 cpp_define (pfile, "__SSP_ALL__=2");
826 else if (flag_stack_protect == 1)
827 cpp_define (pfile, "__SSP__=1");
830 cpp_define (pfile, "_OPENMP=201107");
832 if (int128_integer_type_node != NULL_TREE)
833 builtin_define_type_sizeof ("__SIZEOF_INT128__",
834 int128_integer_type_node);
835 builtin_define_type_sizeof ("__SIZEOF_WCHAR_T__", wchar_type_node);
836 builtin_define_type_sizeof ("__SIZEOF_WINT_T__", wint_type_node);
837 builtin_define_type_sizeof ("__SIZEOF_PTRDIFF_T__",
838 unsigned_ptrdiff_type_node);
840 /* A straightforward target hook doesn't work, because of problems
841 linking that hook's body when part of non-C front ends. */
842 # define preprocessing_asm_p() (cpp_get_options (pfile)->lang == CLK_ASM)
843 # define preprocessing_trad_p() (cpp_get_options (pfile)->traditional)
844 # define builtin_define(TXT) cpp_define (pfile, TXT)
845 # define builtin_assert(TXT) cpp_assert (pfile, TXT)
846 TARGET_CPU_CPP_BUILTINS ();
847 TARGET_OS_CPP_BUILTINS ();
848 TARGET_OBJFMT_CPP_BUILTINS ();
850 /* Support the __declspec keyword by turning them into attributes.
851 Note that the current way we do this may result in a collision
852 with predefined attributes later on. This can be solved by using
853 one attribute, say __declspec__, and passing args to it. The
854 problem with that approach is that args are not accumulated: each
855 new appearance would clobber any existing args. */
857 builtin_define ("__declspec(x)=__attribute__((x))");
859 /* If decimal floating point is supported, tell the user if the
860 alternate format (BID) is used instead of the standard (DPD)
862 if (ENABLE_DECIMAL_FLOAT && ENABLE_DECIMAL_BID_FORMAT)
863 cpp_define (pfile, "__DECIMAL_BID_FORMAT__");
866 /* Pass an object-like macro. If it doesn't lie in the user's
867 namespace, defines it unconditionally. Otherwise define a version
868 with two leading underscores, and another version with two leading
869 and trailing underscores, and define the original only if an ISO
870 standard was not nominated.
872 e.g. passing "unix" defines "__unix", "__unix__" and possibly
873 "unix". Passing "_mips" defines "__mips", "__mips__" and possibly
876 builtin_define_std (const char *macro)
878 size_t len = strlen (macro);
879 char *buff = (char *) alloca (len + 5);
883 /* prepend __ (or maybe just _) if in user's namespace. */
884 memcpy (p, macro, len + 1);
885 if (!( *p == '_' && (p[1] == '_' || ISUPPER (p[1]))))
892 cpp_define (parse_in, p);
894 /* If it was in user's namespace... */
897 /* Define the macro with leading and following __. */
903 cpp_define (parse_in, p);
905 /* Finally, define the original macro if permitted. */
907 cpp_define (parse_in, macro);
911 /* Pass an object-like macro and a value to define it to. The third
912 parameter says whether or not to turn the value into a string
915 builtin_define_with_value (const char *macro, const char *expansion, int is_str)
918 size_t mlen = strlen (macro);
919 size_t elen = strlen (expansion);
920 size_t extra = 2; /* space for an = and a NUL */
923 extra += 2; /* space for two quote marks */
925 buf = (char *) alloca (mlen + elen + extra);
927 sprintf (buf, "%s=\"%s\"", macro, expansion);
929 sprintf (buf, "%s=%s", macro, expansion);
931 cpp_define (parse_in, buf);
935 /* Pass an object-like macro and an integer value to define it to. */
937 builtin_define_with_int_value (const char *macro, HOST_WIDE_INT value)
940 size_t mlen = strlen (macro);
942 size_t extra = 2; /* space for = and NUL. */
944 buf = (char *) alloca (mlen + vlen + extra);
945 memcpy (buf, macro, mlen);
947 sprintf (buf + mlen + 1, HOST_WIDE_INT_PRINT_DEC, value);
949 cpp_define (parse_in, buf);
952 /* builtin_define_with_hex_fp_value is very expensive, so the following
953 array and function allows it to be done lazily when __DBL_MAX__
954 etc. is first used. */
956 struct GTY(()) lazy_hex_fp_value_struct
960 enum machine_mode mode;
962 const char *fp_suffix;
964 static GTY(()) struct lazy_hex_fp_value_struct lazy_hex_fp_values[12];
965 static GTY(()) int lazy_hex_fp_value_count;
968 lazy_hex_fp_value (cpp_reader *pfile ATTRIBUTE_UNUSED,
971 REAL_VALUE_TYPE real;
972 char dec_str[64], buf1[256];
974 if (node->value.builtin < BT_FIRST_USER
975 || (int) node->value.builtin >= BT_FIRST_USER + lazy_hex_fp_value_count)
978 idx = node->value.builtin - BT_FIRST_USER;
979 real_from_string (&real, lazy_hex_fp_values[idx].hex_str);
980 real_to_decimal_for_mode (dec_str, &real, sizeof (dec_str),
981 lazy_hex_fp_values[idx].digits, 0,
982 lazy_hex_fp_values[idx].mode);
984 sprintf (buf1, "%s%s", dec_str, lazy_hex_fp_values[idx].fp_suffix);
985 node->flags &= ~(NODE_BUILTIN | NODE_USED);
986 node->value.macro = lazy_hex_fp_values[idx].macro;
987 for (idx = 0; idx < node->value.macro->count; idx++)
988 if (node->value.macro->exp.tokens[idx].type == CPP_NUMBER)
990 gcc_assert (idx < node->value.macro->count);
991 node->value.macro->exp.tokens[idx].val.str.len = strlen (buf1);
992 node->value.macro->exp.tokens[idx].val.str.text
993 = (const unsigned char *) ggc_strdup (buf1);
997 /* Pass an object-like macro a hexadecimal floating-point value. */
999 builtin_define_with_hex_fp_value (const char *macro,
1000 tree type, int digits,
1001 const char *hex_str,
1002 const char *fp_suffix,
1003 const char *fp_cast)
1005 REAL_VALUE_TYPE real;
1006 char dec_str[64], buf1[256], buf2[256];
1008 /* This is very expensive, so if possible expand them lazily. */
1009 if (lazy_hex_fp_value_count < 12
1010 && flag_dump_macros == 0
1011 && !cpp_get_options (parse_in)->traditional)
1013 struct cpp_hashnode *node;
1014 if (lazy_hex_fp_value_count == 0)
1015 cpp_get_callbacks (parse_in)->user_builtin_macro = lazy_hex_fp_value;
1016 sprintf (buf2, fp_cast, "1.1");
1017 sprintf (buf1, "%s=%s", macro, buf2);
1018 cpp_define (parse_in, buf1);
1019 node = C_CPP_HASHNODE (get_identifier (macro));
1020 lazy_hex_fp_values[lazy_hex_fp_value_count].hex_str
1021 = ggc_strdup (hex_str);
1022 lazy_hex_fp_values[lazy_hex_fp_value_count].mode = TYPE_MODE (type);
1023 lazy_hex_fp_values[lazy_hex_fp_value_count].digits = digits;
1024 lazy_hex_fp_values[lazy_hex_fp_value_count].fp_suffix = fp_suffix;
1025 lazy_hex_fp_values[lazy_hex_fp_value_count].macro = node->value.macro;
1026 node->flags |= NODE_BUILTIN;
1028 = (enum cpp_builtin_type) (BT_FIRST_USER + lazy_hex_fp_value_count);
1029 lazy_hex_fp_value_count++;
1033 /* Hex values are really cool and convenient, except that they're
1034 not supported in strict ISO C90 mode. First, the "p-" sequence
1035 is not valid as part of a preprocessor number. Second, we get a
1036 pedwarn from the preprocessor, which has no context, so we can't
1037 suppress the warning with __extension__.
1039 So instead what we do is construct the number in hex (because
1040 it's easy to get the exact correct value), parse it as a real,
1041 then print it back out as decimal. */
1043 real_from_string (&real, hex_str);
1044 real_to_decimal_for_mode (dec_str, &real, sizeof (dec_str), digits, 0,
1047 /* Assemble the macro in the following fashion
1048 macro = fp_cast [dec_str fp_suffix] */
1049 sprintf (buf1, "%s%s", dec_str, fp_suffix);
1050 sprintf (buf2, fp_cast, buf1);
1051 sprintf (buf1, "%s=%s", macro, buf2);
1053 cpp_define (parse_in, buf1);
1056 /* Return a string constant for the suffix for a value of type TYPE
1057 promoted according to the integer promotions. The type must be one
1058 of the standard integer type nodes. */
1061 type_suffix (tree type)
1063 static const char *const suffixes[] = { "", "U", "L", "UL", "LL", "ULL" };
1064 int unsigned_suffix;
1067 if (type == long_long_integer_type_node
1068 || type == long_long_unsigned_type_node)
1070 else if (type == long_integer_type_node
1071 || type == long_unsigned_type_node)
1073 else if (type == integer_type_node
1074 || type == unsigned_type_node
1075 || type == short_integer_type_node
1076 || type == short_unsigned_type_node
1077 || type == signed_char_type_node
1078 || type == unsigned_char_type_node
1079 /* ??? "char" is not a signed or unsigned integer type and
1080 so is not permitted for the standard typedefs, but some
1081 systems use it anyway. */
1082 || type == char_type_node)
1087 unsigned_suffix = TYPE_UNSIGNED (type);
1088 if (TYPE_PRECISION (type) < TYPE_PRECISION (integer_type_node))
1089 unsigned_suffix = 0;
1090 return suffixes[is_long * 2 + unsigned_suffix];
1093 /* Define MACRO as a <stdint.h> constant-suffix macro for TYPE. */
1095 builtin_define_constants (const char *macro, tree type)
1100 suffix = type_suffix (type);
1104 buf = (char *) alloca (strlen (macro) + 6);
1105 sprintf (buf, "%s(c)=c", macro);
1109 buf = (char *) alloca (strlen (macro) + 9 + strlen (suffix) + 1);
1110 sprintf (buf, "%s(c)=c ## %s", macro, suffix);
1113 cpp_define (parse_in, buf);
1116 /* Define MAX for TYPE based on the precision of the type. */
1119 builtin_define_type_max (const char *macro, tree type)
1121 builtin_define_type_minmax (NULL, macro, type);
1124 /* Define MIN_MACRO (if not NULL) and MAX_MACRO for TYPE based on the
1125 precision of the type. */
1128 builtin_define_type_minmax (const char *min_macro, const char *max_macro,
1131 static const char *const values[]
1134 "2147483647", "4294967295",
1135 "9223372036854775807", "18446744073709551615",
1136 "170141183460469231731687303715884105727",
1137 "340282366920938463463374607431768211455" };
1139 const char *value, *suffix;
1143 /* Pre-rendering the values mean we don't have to futz with printing a
1144 multi-word decimal value. There are also a very limited number of
1145 precisions that we support, so it's really a waste of time. */
1146 switch (TYPE_PRECISION (type))
1148 case 8: idx = 0; break;
1149 case 16: idx = 2; break;
1150 case 32: idx = 4; break;
1151 case 64: idx = 6; break;
1152 case 128: idx = 8; break;
1153 default: gcc_unreachable ();
1156 value = values[idx + TYPE_UNSIGNED (type)];
1157 suffix = type_suffix (type);
1159 buf = (char *) alloca (strlen (max_macro) + 1 + strlen (value)
1160 + strlen (suffix) + 1);
1161 sprintf (buf, "%s=%s%s", max_macro, value, suffix);
1163 cpp_define (parse_in, buf);
1167 if (TYPE_UNSIGNED (type))
1169 buf = (char *) alloca (strlen (min_macro) + 2 + strlen (suffix) + 1);
1170 sprintf (buf, "%s=0%s", min_macro, suffix);
1174 buf = (char *) alloca (strlen (min_macro) + 3
1175 + strlen (max_macro) + 6);
1176 sprintf (buf, "%s=(-%s - 1)", min_macro, max_macro);
1178 cpp_define (parse_in, buf);
1182 #include "gt-c-family-c-cppbuiltin.h"