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 #ifdef HAVE_sync_compare_and_swapqi
762 if (HAVE_sync_compare_and_swapqi)
763 cpp_define (pfile, "__GCC_HAVE_SYNC_COMPARE_AND_SWAP_1");
766 #ifdef HAVE_sync_compare_and_swaphi
767 if (HAVE_sync_compare_and_swaphi)
768 cpp_define (pfile, "__GCC_HAVE_SYNC_COMPARE_AND_SWAP_2");
771 #ifdef HAVE_sync_compare_and_swapsi
772 if (HAVE_sync_compare_and_swapsi)
773 cpp_define (pfile, "__GCC_HAVE_SYNC_COMPARE_AND_SWAP_4");
776 #ifdef HAVE_sync_compare_and_swapdi
777 if (HAVE_sync_compare_and_swapdi)
778 cpp_define (pfile, "__GCC_HAVE_SYNC_COMPARE_AND_SWAP_8");
781 #ifdef HAVE_sync_compare_and_swapti
782 if (HAVE_sync_compare_and_swapti)
783 cpp_define (pfile, "__GCC_HAVE_SYNC_COMPARE_AND_SWAP_16");
786 #ifdef DWARF2_UNWIND_INFO
787 if (dwarf2out_do_cfi_asm ())
788 cpp_define (pfile, "__GCC_HAVE_DWARF2_CFI_ASM");
791 /* Make the choice of ObjC runtime visible to source code. */
792 if (c_dialect_objc () && flag_next_runtime)
793 cpp_define (pfile, "__NEXT_RUNTIME__");
795 /* Show the availability of some target pragmas. */
796 cpp_define (pfile, "__PRAGMA_REDEFINE_EXTNAME");
798 if (targetm.handle_pragma_extern_prefix)
799 cpp_define (pfile, "__PRAGMA_EXTERN_PREFIX");
801 /* Make the choice of the stack protector runtime visible to source code.
802 The macro names and values here were chosen for compatibility with an
803 earlier implementation, i.e. ProPolice. */
804 if (flag_stack_protect == 2)
805 cpp_define (pfile, "__SSP_ALL__=2");
806 else if (flag_stack_protect == 1)
807 cpp_define (pfile, "__SSP__=1");
810 cpp_define (pfile, "_OPENMP=201107");
812 if (int128_integer_type_node != NULL_TREE)
813 builtin_define_type_sizeof ("__SIZEOF_INT128__",
814 int128_integer_type_node);
815 builtin_define_type_sizeof ("__SIZEOF_WCHAR_T__", wchar_type_node);
816 builtin_define_type_sizeof ("__SIZEOF_WINT_T__", wint_type_node);
817 builtin_define_type_sizeof ("__SIZEOF_PTRDIFF_T__",
818 unsigned_ptrdiff_type_node);
820 /* A straightforward target hook doesn't work, because of problems
821 linking that hook's body when part of non-C front ends. */
822 # define preprocessing_asm_p() (cpp_get_options (pfile)->lang == CLK_ASM)
823 # define preprocessing_trad_p() (cpp_get_options (pfile)->traditional)
824 # define builtin_define(TXT) cpp_define (pfile, TXT)
825 # define builtin_assert(TXT) cpp_assert (pfile, TXT)
826 TARGET_CPU_CPP_BUILTINS ();
827 TARGET_OS_CPP_BUILTINS ();
828 TARGET_OBJFMT_CPP_BUILTINS ();
830 /* Support the __declspec keyword by turning them into attributes.
831 Note that the current way we do this may result in a collision
832 with predefined attributes later on. This can be solved by using
833 one attribute, say __declspec__, and passing args to it. The
834 problem with that approach is that args are not accumulated: each
835 new appearance would clobber any existing args. */
837 builtin_define ("__declspec(x)=__attribute__((x))");
839 /* If decimal floating point is supported, tell the user if the
840 alternate format (BID) is used instead of the standard (DPD)
842 if (ENABLE_DECIMAL_FLOAT && ENABLE_DECIMAL_BID_FORMAT)
843 cpp_define (pfile, "__DECIMAL_BID_FORMAT__");
846 /* Pass an object-like macro. If it doesn't lie in the user's
847 namespace, defines it unconditionally. Otherwise define a version
848 with two leading underscores, and another version with two leading
849 and trailing underscores, and define the original only if an ISO
850 standard was not nominated.
852 e.g. passing "unix" defines "__unix", "__unix__" and possibly
853 "unix". Passing "_mips" defines "__mips", "__mips__" and possibly
856 builtin_define_std (const char *macro)
858 size_t len = strlen (macro);
859 char *buff = (char *) alloca (len + 5);
863 /* prepend __ (or maybe just _) if in user's namespace. */
864 memcpy (p, macro, len + 1);
865 if (!( *p == '_' && (p[1] == '_' || ISUPPER (p[1]))))
872 cpp_define (parse_in, p);
874 /* If it was in user's namespace... */
877 /* Define the macro with leading and following __. */
883 cpp_define (parse_in, p);
885 /* Finally, define the original macro if permitted. */
887 cpp_define (parse_in, macro);
891 /* Pass an object-like macro and a value to define it to. The third
892 parameter says whether or not to turn the value into a string
895 builtin_define_with_value (const char *macro, const char *expansion, int is_str)
898 size_t mlen = strlen (macro);
899 size_t elen = strlen (expansion);
900 size_t extra = 2; /* space for an = and a NUL */
903 extra += 2; /* space for two quote marks */
905 buf = (char *) alloca (mlen + elen + extra);
907 sprintf (buf, "%s=\"%s\"", macro, expansion);
909 sprintf (buf, "%s=%s", macro, expansion);
911 cpp_define (parse_in, buf);
915 /* Pass an object-like macro and an integer value to define it to. */
917 builtin_define_with_int_value (const char *macro, HOST_WIDE_INT value)
920 size_t mlen = strlen (macro);
922 size_t extra = 2; /* space for = and NUL. */
924 buf = (char *) alloca (mlen + vlen + extra);
925 memcpy (buf, macro, mlen);
927 sprintf (buf + mlen + 1, HOST_WIDE_INT_PRINT_DEC, value);
929 cpp_define (parse_in, buf);
932 /* builtin_define_with_hex_fp_value is very expensive, so the following
933 array and function allows it to be done lazily when __DBL_MAX__
934 etc. is first used. */
936 struct GTY(()) lazy_hex_fp_value_struct
940 enum machine_mode mode;
942 const char *fp_suffix;
944 static GTY(()) struct lazy_hex_fp_value_struct lazy_hex_fp_values[12];
945 static GTY(()) int lazy_hex_fp_value_count;
948 lazy_hex_fp_value (cpp_reader *pfile ATTRIBUTE_UNUSED,
951 REAL_VALUE_TYPE real;
952 char dec_str[64], buf1[256];
954 if (node->value.builtin < BT_FIRST_USER
955 || (int) node->value.builtin >= BT_FIRST_USER + lazy_hex_fp_value_count)
958 idx = node->value.builtin - BT_FIRST_USER;
959 real_from_string (&real, lazy_hex_fp_values[idx].hex_str);
960 real_to_decimal_for_mode (dec_str, &real, sizeof (dec_str),
961 lazy_hex_fp_values[idx].digits, 0,
962 lazy_hex_fp_values[idx].mode);
964 sprintf (buf1, "%s%s", dec_str, lazy_hex_fp_values[idx].fp_suffix);
965 node->flags &= ~(NODE_BUILTIN | NODE_USED);
966 node->value.macro = lazy_hex_fp_values[idx].macro;
967 for (idx = 0; idx < node->value.macro->count; idx++)
968 if (node->value.macro->exp.tokens[idx].type == CPP_NUMBER)
970 gcc_assert (idx < node->value.macro->count);
971 node->value.macro->exp.tokens[idx].val.str.len = strlen (buf1);
972 node->value.macro->exp.tokens[idx].val.str.text
973 = (const unsigned char *) ggc_strdup (buf1);
977 /* Pass an object-like macro a hexadecimal floating-point value. */
979 builtin_define_with_hex_fp_value (const char *macro,
980 tree type, int digits,
982 const char *fp_suffix,
985 REAL_VALUE_TYPE real;
986 char dec_str[64], buf1[256], buf2[256];
988 /* This is very expensive, so if possible expand them lazily. */
989 if (lazy_hex_fp_value_count < 12
990 && flag_dump_macros == 0
991 && !cpp_get_options (parse_in)->traditional)
993 struct cpp_hashnode *node;
994 if (lazy_hex_fp_value_count == 0)
995 cpp_get_callbacks (parse_in)->user_builtin_macro = lazy_hex_fp_value;
996 sprintf (buf2, fp_cast, "1.1");
997 sprintf (buf1, "%s=%s", macro, buf2);
998 cpp_define (parse_in, buf1);
999 node = C_CPP_HASHNODE (get_identifier (macro));
1000 lazy_hex_fp_values[lazy_hex_fp_value_count].hex_str
1001 = ggc_strdup (hex_str);
1002 lazy_hex_fp_values[lazy_hex_fp_value_count].mode = TYPE_MODE (type);
1003 lazy_hex_fp_values[lazy_hex_fp_value_count].digits = digits;
1004 lazy_hex_fp_values[lazy_hex_fp_value_count].fp_suffix = fp_suffix;
1005 lazy_hex_fp_values[lazy_hex_fp_value_count].macro = node->value.macro;
1006 node->flags |= NODE_BUILTIN;
1008 = (enum cpp_builtin_type) (BT_FIRST_USER + lazy_hex_fp_value_count);
1009 lazy_hex_fp_value_count++;
1013 /* Hex values are really cool and convenient, except that they're
1014 not supported in strict ISO C90 mode. First, the "p-" sequence
1015 is not valid as part of a preprocessor number. Second, we get a
1016 pedwarn from the preprocessor, which has no context, so we can't
1017 suppress the warning with __extension__.
1019 So instead what we do is construct the number in hex (because
1020 it's easy to get the exact correct value), parse it as a real,
1021 then print it back out as decimal. */
1023 real_from_string (&real, hex_str);
1024 real_to_decimal_for_mode (dec_str, &real, sizeof (dec_str), digits, 0,
1027 /* Assemble the macro in the following fashion
1028 macro = fp_cast [dec_str fp_suffix] */
1029 sprintf (buf1, "%s%s", dec_str, fp_suffix);
1030 sprintf (buf2, fp_cast, buf1);
1031 sprintf (buf1, "%s=%s", macro, buf2);
1033 cpp_define (parse_in, buf1);
1036 /* Return a string constant for the suffix for a value of type TYPE
1037 promoted according to the integer promotions. The type must be one
1038 of the standard integer type nodes. */
1041 type_suffix (tree type)
1043 static const char *const suffixes[] = { "", "U", "L", "UL", "LL", "ULL" };
1044 int unsigned_suffix;
1047 if (type == long_long_integer_type_node
1048 || type == long_long_unsigned_type_node)
1050 else if (type == long_integer_type_node
1051 || type == long_unsigned_type_node)
1053 else if (type == integer_type_node
1054 || type == unsigned_type_node
1055 || type == short_integer_type_node
1056 || type == short_unsigned_type_node
1057 || type == signed_char_type_node
1058 || type == unsigned_char_type_node
1059 /* ??? "char" is not a signed or unsigned integer type and
1060 so is not permitted for the standard typedefs, but some
1061 systems use it anyway. */
1062 || type == char_type_node)
1067 unsigned_suffix = TYPE_UNSIGNED (type);
1068 if (TYPE_PRECISION (type) < TYPE_PRECISION (integer_type_node))
1069 unsigned_suffix = 0;
1070 return suffixes[is_long * 2 + unsigned_suffix];
1073 /* Define MACRO as a <stdint.h> constant-suffix macro for TYPE. */
1075 builtin_define_constants (const char *macro, tree type)
1080 suffix = type_suffix (type);
1084 buf = (char *) alloca (strlen (macro) + 6);
1085 sprintf (buf, "%s(c)=c", macro);
1089 buf = (char *) alloca (strlen (macro) + 9 + strlen (suffix) + 1);
1090 sprintf (buf, "%s(c)=c ## %s", macro, suffix);
1093 cpp_define (parse_in, buf);
1096 /* Define MAX for TYPE based on the precision of the type. */
1099 builtin_define_type_max (const char *macro, tree type)
1101 builtin_define_type_minmax (NULL, macro, type);
1104 /* Define MIN_MACRO (if not NULL) and MAX_MACRO for TYPE based on the
1105 precision of the type. */
1108 builtin_define_type_minmax (const char *min_macro, const char *max_macro,
1111 static const char *const values[]
1114 "2147483647", "4294967295",
1115 "9223372036854775807", "18446744073709551615",
1116 "170141183460469231731687303715884105727",
1117 "340282366920938463463374607431768211455" };
1119 const char *value, *suffix;
1123 /* Pre-rendering the values mean we don't have to futz with printing a
1124 multi-word decimal value. There are also a very limited number of
1125 precisions that we support, so it's really a waste of time. */
1126 switch (TYPE_PRECISION (type))
1128 case 8: idx = 0; break;
1129 case 16: idx = 2; break;
1130 case 32: idx = 4; break;
1131 case 64: idx = 6; break;
1132 case 128: idx = 8; break;
1133 default: gcc_unreachable ();
1136 value = values[idx + TYPE_UNSIGNED (type)];
1137 suffix = type_suffix (type);
1139 buf = (char *) alloca (strlen (max_macro) + 1 + strlen (value)
1140 + strlen (suffix) + 1);
1141 sprintf (buf, "%s=%s%s", max_macro, value, suffix);
1143 cpp_define (parse_in, buf);
1147 if (TYPE_UNSIGNED (type))
1149 buf = (char *) alloca (strlen (min_macro) + 2 + strlen (suffix) + 1);
1150 sprintf (buf, "%s=0%s", min_macro, suffix);
1154 buf = (char *) alloca (strlen (min_macro) + 3
1155 + strlen (max_macro) + 6);
1156 sprintf (buf, "%s=(-%s - 1)", min_macro, max_macro);
1158 cpp_define (parse_in, buf);
1162 #include "gt-c-family-c-cppbuiltin.h"