1 /* Define builtin-in macros for the C family front ends.
2 Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007
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"
32 #include "except.h" /* For USING_SJLJ_EXCEPTIONS. */
34 #include "tm_p.h" /* Target prototypes. */
37 #ifndef TARGET_OS_CPP_BUILTINS
38 # define TARGET_OS_CPP_BUILTINS()
41 #ifndef TARGET_OBJFMT_CPP_BUILTINS
42 # define TARGET_OBJFMT_CPP_BUILTINS()
45 #ifndef REGISTER_PREFIX
46 #define REGISTER_PREFIX ""
49 /* Non-static as some targets don't use it. */
50 void builtin_define_std (const char *) ATTRIBUTE_UNUSED;
51 static void builtin_define_with_int_value (const char *, HOST_WIDE_INT);
52 static void builtin_define_with_hex_fp_value (const char *, tree,
56 static void builtin_define_stdint_macros (void);
57 static void builtin_define_type_max (const char *, tree, int);
58 static void builtin_define_type_precision (const char *, tree);
59 static void builtin_define_type_sizeof (const char *, tree);
60 static void builtin_define_float_constants (const char *,
64 static void define__GNUC__ (void);
66 /* Define NAME with value TYPE precision. */
68 builtin_define_type_precision (const char *name, tree type)
70 builtin_define_with_int_value (name, TYPE_PRECISION (type));
73 /* Define NAME with value TYPE size_unit. */
75 builtin_define_type_sizeof (const char *name, tree type)
77 builtin_define_with_int_value (name,
78 tree_low_cst (TYPE_SIZE_UNIT (type), 1));
81 /* Define the float.h constants for TYPE using NAME_PREFIX, FP_SUFFIX,
84 builtin_define_float_constants (const char *name_prefix,
85 const char *fp_suffix,
89 /* Used to convert radix-based values to base 10 values in several cases.
91 In the max_exp -> max_10_exp conversion for 128-bit IEEE, we need at
92 least 6 significant digits for correct results. Using the fraction
93 formed by (log(2)*1e6)/(log(10)*1e6) overflows a 32-bit integer as an
94 intermediate; perhaps someone can find a better approximation, in the
95 mean time, I suspect using doubles won't harm the bootstrap here. */
97 const double log10_2 = .30102999566398119521;
99 const struct real_format *fmt;
101 char name[64], buf[128];
102 int dig, min_10_exp, max_10_exp;
105 fmt = REAL_MODE_FORMAT (TYPE_MODE (type));
106 gcc_assert (fmt->b != 10);
108 /* The radix of the exponent representation. */
109 if (type == float_type_node)
110 builtin_define_with_int_value ("__FLT_RADIX__", fmt->b);
113 /* The number of radix digits, p, in the floating-point significand. */
114 sprintf (name, "__%s_MANT_DIG__", name_prefix);
115 builtin_define_with_int_value (name, fmt->p);
117 /* The number of decimal digits, q, such that any floating-point number
118 with q decimal digits can be rounded into a floating-point number with
119 p radix b digits and back again without change to the q decimal digits,
121 p log10 b if b is a power of 10
122 floor((p - 1) log10 b) otherwise
124 dig = (fmt->p - 1) * log10_b;
125 sprintf (name, "__%s_DIG__", name_prefix);
126 builtin_define_with_int_value (name, dig);
128 /* The minimum negative int x such that b**(x-1) is a normalized float. */
129 sprintf (name, "__%s_MIN_EXP__", name_prefix);
130 sprintf (buf, "(%d)", fmt->emin);
131 builtin_define_with_value (name, buf, 0);
133 /* The minimum negative int x such that 10**x is a normalized float,
135 ceil (log10 (b ** (emin - 1)))
136 = ceil (log10 (b) * (emin - 1))
138 Recall that emin is negative, so the integer truncation calculates
139 the ceiling, not the floor, in this case. */
140 min_10_exp = (fmt->emin - 1) * log10_b;
141 sprintf (name, "__%s_MIN_10_EXP__", name_prefix);
142 sprintf (buf, "(%d)", min_10_exp);
143 builtin_define_with_value (name, buf, 0);
145 /* The maximum int x such that b**(x-1) is a representable float. */
146 sprintf (name, "__%s_MAX_EXP__", name_prefix);
147 builtin_define_with_int_value (name, fmt->emax);
149 /* The maximum int x such that 10**x is in the range of representable
150 finite floating-point numbers,
152 floor (log10((1 - b**-p) * b**emax))
153 = floor (log10(1 - b**-p) + log10(b**emax))
154 = floor (log10(1 - b**-p) + log10(b)*emax)
156 The safest thing to do here is to just compute this number. But since
157 we don't link cc1 with libm, we cannot. We could implement log10 here
158 a series expansion, but that seems too much effort because:
160 Note that the first term, for all extant p, is a number exceedingly close
161 to zero, but slightly negative. Note that the second term is an integer
162 scaling an irrational number, and that because of the floor we are only
163 interested in its integral portion.
165 In order for the first term to have any effect on the integral portion
166 of the second term, the second term has to be exceedingly close to an
167 integer itself (e.g. 123.000000000001 or something). Getting a result
168 that close to an integer requires that the irrational multiplicand have
169 a long series of zeros in its expansion, which doesn't occur in the
170 first 20 digits or so of log10(b).
172 Hand-waving aside, crunching all of the sets of constants above by hand
173 does not yield a case for which the first term is significant, which
174 in the end is all that matters. */
175 max_10_exp = fmt->emax * log10_b;
176 sprintf (name, "__%s_MAX_10_EXP__", name_prefix);
177 builtin_define_with_int_value (name, max_10_exp);
179 /* The number of decimal digits, n, such that any floating-point number
180 can be rounded to n decimal digits and back again without change to
183 p * log10(b) if b is a power of 10
184 ceil(1 + p * log10(b)) otherwise
186 The only macro we care about is this number for the widest supported
187 floating type, but we want this value for rendering constants below. */
189 double d_decimal_dig = 1 + fmt->p * log10_b;
190 decimal_dig = d_decimal_dig;
191 if (decimal_dig < d_decimal_dig)
194 if (type == long_double_type_node)
195 builtin_define_with_int_value ("__DECIMAL_DIG__", decimal_dig);
197 /* Since, for the supported formats, B is always a power of 2, we
198 construct the following numbers directly as a hexadecimal
200 get_max_float (fmt, buf, sizeof (buf));
202 sprintf (name, "__%s_MAX__", name_prefix);
203 builtin_define_with_hex_fp_value (name, type, decimal_dig, buf, fp_suffix, fp_cast);
205 /* The minimum normalized positive floating-point number,
207 sprintf (name, "__%s_MIN__", name_prefix);
208 sprintf (buf, "0x1p%d", fmt->emin - 1);
209 builtin_define_with_hex_fp_value (name, type, decimal_dig, buf, fp_suffix, fp_cast);
211 /* The difference between 1 and the least value greater than 1 that is
212 representable in the given floating point type, b**(1-p). */
213 sprintf (name, "__%s_EPSILON__", name_prefix);
214 if (fmt->pnan < fmt->p)
215 /* This is an IBM extended double format, so 1.0 + any double is
216 representable precisely. */
217 sprintf (buf, "0x1p%d", fmt->emin - fmt->p);
219 sprintf (buf, "0x1p%d", 1 - fmt->p);
220 builtin_define_with_hex_fp_value (name, type, decimal_dig, buf, fp_suffix, fp_cast);
222 /* For C++ std::numeric_limits<T>::denorm_min. The minimum denormalized
223 positive floating-point number, b**(emin-p). Zero for formats that
224 don't support denormals. */
225 sprintf (name, "__%s_DENORM_MIN__", name_prefix);
228 sprintf (buf, "0x1p%d", fmt->emin - fmt->p);
229 builtin_define_with_hex_fp_value (name, type, decimal_dig,
230 buf, fp_suffix, fp_cast);
234 sprintf (buf, "0.0%s", fp_suffix);
235 builtin_define_with_value (name, buf, 0);
238 sprintf (name, "__%s_HAS_DENORM__", name_prefix);
239 builtin_define_with_value (name, fmt->has_denorm ? "1" : "0", 0);
241 /* For C++ std::numeric_limits<T>::has_infinity. */
242 sprintf (name, "__%s_HAS_INFINITY__", name_prefix);
243 builtin_define_with_int_value (name,
244 MODE_HAS_INFINITIES (TYPE_MODE (type)));
245 /* For C++ std::numeric_limits<T>::has_quiet_NaN. We do not have a
246 predicate to distinguish a target that has both quiet and
247 signalling NaNs from a target that has only quiet NaNs or only
248 signalling NaNs, so we assume that a target that has any kind of
249 NaN has quiet NaNs. */
250 sprintf (name, "__%s_HAS_QUIET_NAN__", name_prefix);
251 builtin_define_with_int_value (name, MODE_HAS_NANS (TYPE_MODE (type)));
254 /* Define __DECx__ constants for TYPE using NAME_PREFIX and SUFFIX. */
256 builtin_define_decimal_float_constants (const char *name_prefix,
260 const struct real_format *fmt;
261 char name[64], buf[128], *p;
264 fmt = REAL_MODE_FORMAT (TYPE_MODE (type));
266 /* The number of radix digits, p, in the significand. */
267 sprintf (name, "__%s_MANT_DIG__", name_prefix);
268 builtin_define_with_int_value (name, fmt->p);
270 /* The minimum negative int x such that b**(x-1) is a normalized float. */
271 sprintf (name, "__%s_MIN_EXP__", name_prefix);
272 sprintf (buf, "(%d)", fmt->emin);
273 builtin_define_with_value (name, buf, 0);
275 /* The maximum int x such that b**(x-1) is a representable float. */
276 sprintf (name, "__%s_MAX_EXP__", name_prefix);
277 builtin_define_with_int_value (name, fmt->emax);
279 /* Compute the minimum representable value. */
280 sprintf (name, "__%s_MIN__", name_prefix);
281 sprintf (buf, "1E%d%s", fmt->emin, suffix);
282 builtin_define_with_value (name, buf, 0);
284 /* Compute the maximum representable value. */
285 sprintf (name, "__%s_MAX__", name_prefix);
287 for (digits = fmt->p; digits; digits--)
290 if (digits == fmt->p)
294 /* fmt->p plus 1, to account for the decimal point. */
295 sprintf (&buf[fmt->p + 1], "E%d%s", fmt->emax, suffix);
296 builtin_define_with_value (name, buf, 0);
298 /* Compute epsilon (the difference between 1 and least value greater
299 than 1 representable). */
300 sprintf (name, "__%s_EPSILON__", name_prefix);
301 sprintf (buf, "1E-%d%s", fmt->p - 1, suffix);
302 builtin_define_with_value (name, buf, 0);
304 /* Minimum denormalized postive decimal value. */
305 sprintf (name, "__%s_DEN__", name_prefix);
307 for (digits = fmt->p; digits > 1; digits--)
310 if (digits == fmt->p)
314 sprintf (&buf[fmt->p], "1E%d%s", fmt->emin, suffix);
315 builtin_define_with_value (name, buf, 0);
318 /* Define fixed-point constants for TYPE using NAME_PREFIX and SUFFIX. */
321 builtin_define_fixed_point_constants (const char *name_prefix,
325 char name[64], buf[256], *new_buf;
328 sprintf (name, "__%s_FBIT__", name_prefix);
329 builtin_define_with_int_value (name, TYPE_FBIT (type));
331 sprintf (name, "__%s_IBIT__", name_prefix);
332 builtin_define_with_int_value (name, TYPE_IBIT (type));
334 /* If there is no suffix, defines are for fixed-point modes.
336 if (strcmp (suffix, "") == 0)
339 if (TYPE_UNSIGNED (type))
341 sprintf (name, "__%s_MIN__", name_prefix);
342 sprintf (buf, "0.0%s", suffix);
343 builtin_define_with_value (name, buf, 0);
347 sprintf (name, "__%s_MIN__", name_prefix);
348 if (ALL_ACCUM_MODE_P (TYPE_MODE (type)))
349 sprintf (buf, "(-0X1P%d%s-0X1P%d%s)", TYPE_IBIT (type) - 1, suffix,
350 TYPE_IBIT (type) - 1, suffix);
352 sprintf (buf, "(-0.5%s-0.5%s)", suffix, suffix);
353 builtin_define_with_value (name, buf, 0);
356 sprintf (name, "__%s_MAX__", name_prefix);
359 mod = (TYPE_FBIT (type) + TYPE_IBIT (type)) % 4;
361 sprintf (new_buf++, "%x", (1 << mod) - 1);
362 for (i = 0; i < (TYPE_FBIT (type) + TYPE_IBIT (type)) / 4; i++)
363 sprintf (new_buf++, "F");
364 sprintf (new_buf, "P-%d%s", TYPE_FBIT (type), suffix);
365 builtin_define_with_value (name, buf, 0);
367 sprintf (name, "__%s_EPSILON__", name_prefix);
368 sprintf (buf, "0x1P-%d%s", TYPE_FBIT (type), suffix);
369 builtin_define_with_value (name, buf, 0);
372 /* Define __GNUC__, __GNUC_MINOR__ and __GNUC_PATCHLEVEL__. */
374 define__GNUC__ (void)
376 int major, minor, patchlevel;
378 if (sscanf (BASEVER, "%d.%d.%d", &major, &minor, &patchlevel) != 3)
380 sscanf (BASEVER, "%d.%d", &major, &minor);
383 cpp_define_formatted (parse_in, "__GNUC__=%d", major);
384 cpp_define_formatted (parse_in, "__GNUC_MINOR__=%d", minor);
385 cpp_define_formatted (parse_in, "__GNUC_PATCHLEVEL__=%d", patchlevel);
389 /* Define macros used by <stdint.h>. Currently only defines limits
390 for intmax_t, used by the testsuite. */
392 builtin_define_stdint_macros (void)
395 if (intmax_type_node == long_long_integer_type_node)
397 else if (intmax_type_node == long_integer_type_node)
399 else if (intmax_type_node == integer_type_node)
403 builtin_define_type_max ("__INTMAX_MAX__", intmax_type_node, intmax_long);
406 /* Hook that registers front end and target-specific built-ins. */
408 c_cpp_builtins (cpp_reader *pfile)
410 /* -undef turns off target-specific built-ins. */
416 /* For stddef.h. They require macros defined in c-common.c. */
417 c_stddef_cpp_builtins ();
419 if (c_dialect_cxx ())
421 if (flag_weak && SUPPORTS_ONE_ONLY)
422 cpp_define (pfile, "__GXX_WEAK__=1");
424 cpp_define (pfile, "__GXX_WEAK__=0");
426 cpp_define (pfile, "__DEPRECATED");
428 cpp_define (pfile, "__GXX_RTTI");
429 if (cxx_dialect == cxx0x)
430 cpp_define (pfile, "__GXX_EXPERIMENTAL_CXX0X__");
432 /* Note that we define this for C as well, so that we know if
433 __attribute__((cleanup)) will interface with EH. */
435 cpp_define (pfile, "__EXCEPTIONS");
437 /* Represents the C++ ABI version, always defined so it can be used while
438 preprocessing C and assembler. */
439 if (flag_abi_version == 0)
440 /* Use a very large value so that:
442 #if __GXX_ABI_VERSION >= <value for version X>
444 will work whether the user explicitly says "-fabi-version=x" or
445 "-fabi-version=0". Do not use INT_MAX because that will be
446 different from system to system. */
447 builtin_define_with_int_value ("__GXX_ABI_VERSION", 999999);
448 else if (flag_abi_version == 1)
449 /* Due to a historical accident, this version had the value
451 builtin_define_with_int_value ("__GXX_ABI_VERSION", 102);
453 /* Newer versions have values 1002, 1003, .... */
454 builtin_define_with_int_value ("__GXX_ABI_VERSION",
455 1000 + flag_abi_version);
457 /* libgcc needs to know this. */
458 if (USING_SJLJ_EXCEPTIONS)
459 cpp_define (pfile, "__USING_SJLJ_EXCEPTIONS__");
461 /* limits.h needs to know these. */
462 builtin_define_type_max ("__SCHAR_MAX__", signed_char_type_node, 0);
463 builtin_define_type_max ("__SHRT_MAX__", short_integer_type_node, 0);
464 builtin_define_type_max ("__INT_MAX__", integer_type_node, 0);
465 builtin_define_type_max ("__LONG_MAX__", long_integer_type_node, 1);
466 builtin_define_type_max ("__LONG_LONG_MAX__", long_long_integer_type_node, 2);
467 builtin_define_type_max ("__WCHAR_MAX__", wchar_type_node, 0);
469 builtin_define_type_precision ("__CHAR_BIT__", char_type_node);
471 /* stdint.h (eventually) and the testsuite need to know these. */
472 builtin_define_stdint_macros ();
474 /* float.h needs to know these. */
476 builtin_define_with_int_value ("__FLT_EVAL_METHOD__",
477 TARGET_FLT_EVAL_METHOD);
479 /* And decfloat.h needs this. */
480 builtin_define_with_int_value ("__DEC_EVAL_METHOD__",
481 TARGET_DEC_EVAL_METHOD);
483 builtin_define_float_constants ("FLT", "F", "%s", float_type_node);
484 /* Cast the double precision constants when single precision constants are
485 specified. The correct result is computed by the compiler when using
486 macros that include a cast. This has the side-effect of making the value
487 unusable in const expressions. */
488 if (flag_single_precision_constant)
489 builtin_define_float_constants ("DBL", "L", "((double)%s)", double_type_node);
491 builtin_define_float_constants ("DBL", "", "%s", double_type_node);
492 builtin_define_float_constants ("LDBL", "L", "%s", long_double_type_node);
494 /* For decfloat.h. */
495 builtin_define_decimal_float_constants ("DEC32", "DF", dfloat32_type_node);
496 builtin_define_decimal_float_constants ("DEC64", "DD", dfloat64_type_node);
497 builtin_define_decimal_float_constants ("DEC128", "DL", dfloat128_type_node);
499 /* For fixed-point fibt, ibit, max, min, and epsilon. */
500 if (targetm.fixed_point_supported_p ())
502 builtin_define_fixed_point_constants ("SFRACT", "HR",
503 short_fract_type_node);
504 builtin_define_fixed_point_constants ("USFRACT", "UHR",
505 unsigned_short_fract_type_node);
506 builtin_define_fixed_point_constants ("FRACT", "R",
508 builtin_define_fixed_point_constants ("UFRACT", "UR",
509 unsigned_fract_type_node);
510 builtin_define_fixed_point_constants ("LFRACT", "LR",
511 long_fract_type_node);
512 builtin_define_fixed_point_constants ("ULFRACT", "ULR",
513 unsigned_long_fract_type_node);
514 builtin_define_fixed_point_constants ("LLFRACT", "LLR",
515 long_long_fract_type_node);
516 builtin_define_fixed_point_constants ("ULLFRACT", "ULLR",
517 unsigned_long_long_fract_type_node);
518 builtin_define_fixed_point_constants ("SACCUM", "HK",
519 short_accum_type_node);
520 builtin_define_fixed_point_constants ("USACCUM", "UHK",
521 unsigned_short_accum_type_node);
522 builtin_define_fixed_point_constants ("ACCUM", "K",
524 builtin_define_fixed_point_constants ("UACCUM", "UK",
525 unsigned_accum_type_node);
526 builtin_define_fixed_point_constants ("LACCUM", "LK",
527 long_accum_type_node);
528 builtin_define_fixed_point_constants ("ULACCUM", "ULK",
529 unsigned_long_accum_type_node);
530 builtin_define_fixed_point_constants ("LLACCUM", "LLK",
531 long_long_accum_type_node);
532 builtin_define_fixed_point_constants ("ULLACCUM", "ULLK",
533 unsigned_long_long_accum_type_node);
535 builtin_define_fixed_point_constants ("QQ", "", qq_type_node);
536 builtin_define_fixed_point_constants ("HQ", "", hq_type_node);
537 builtin_define_fixed_point_constants ("SQ", "", sq_type_node);
538 builtin_define_fixed_point_constants ("DQ", "", dq_type_node);
539 builtin_define_fixed_point_constants ("TQ", "", tq_type_node);
540 builtin_define_fixed_point_constants ("UQQ", "", uqq_type_node);
541 builtin_define_fixed_point_constants ("UHQ", "", uhq_type_node);
542 builtin_define_fixed_point_constants ("USQ", "", usq_type_node);
543 builtin_define_fixed_point_constants ("UDQ", "", udq_type_node);
544 builtin_define_fixed_point_constants ("UTQ", "", utq_type_node);
545 builtin_define_fixed_point_constants ("HA", "", ha_type_node);
546 builtin_define_fixed_point_constants ("SA", "", sa_type_node);
547 builtin_define_fixed_point_constants ("DA", "", da_type_node);
548 builtin_define_fixed_point_constants ("TA", "", ta_type_node);
549 builtin_define_fixed_point_constants ("UHA", "", uha_type_node);
550 builtin_define_fixed_point_constants ("USA", "", usa_type_node);
551 builtin_define_fixed_point_constants ("UDA", "", uda_type_node);
552 builtin_define_fixed_point_constants ("UTA", "", uta_type_node);
555 /* For use in assembly language. */
556 builtin_define_with_value ("__REGISTER_PREFIX__", REGISTER_PREFIX, 0);
557 builtin_define_with_value ("__USER_LABEL_PREFIX__", user_label_prefix, 0);
560 builtin_define_with_value ("__VERSION__", version_string, 1);
562 if (flag_gnu89_inline)
563 cpp_define (pfile, "__GNUC_GNU_INLINE__");
565 cpp_define (pfile, "__GNUC_STDC_INLINE__");
567 /* Definitions for LP64 model. */
568 if (TYPE_PRECISION (long_integer_type_node) == 64
569 && POINTER_SIZE == 64
570 && TYPE_PRECISION (integer_type_node) == 32)
572 cpp_define (pfile, "_LP64");
573 cpp_define (pfile, "__LP64__");
576 /* Other target-independent built-ins determined by command-line
579 cpp_define (pfile, "__OPTIMIZE_SIZE__");
581 cpp_define (pfile, "__OPTIMIZE__");
583 if (fast_math_flags_set_p ())
584 cpp_define (pfile, "__FAST_MATH__");
585 if (flag_really_no_inline)
586 cpp_define (pfile, "__NO_INLINE__");
587 if (flag_signaling_nans)
588 cpp_define (pfile, "__SUPPORT_SNAN__");
589 if (flag_finite_math_only)
590 cpp_define (pfile, "__FINITE_MATH_ONLY__=1");
592 cpp_define (pfile, "__FINITE_MATH_ONLY__=0");
595 builtin_define_with_int_value ("__pic__", flag_pic);
596 builtin_define_with_int_value ("__PIC__", flag_pic);
600 builtin_define_with_int_value ("__pie__", flag_pie);
601 builtin_define_with_int_value ("__PIE__", flag_pie);
605 cpp_define (pfile, "__STRICT_ANSI__");
607 if (!flag_signed_char)
608 cpp_define (pfile, "__CHAR_UNSIGNED__");
610 if (c_dialect_cxx () && TYPE_UNSIGNED (wchar_type_node))
611 cpp_define (pfile, "__WCHAR_UNSIGNED__");
613 /* Tell source code if the compiler makes sync_compare_and_swap
614 builtins available. */
615 #ifdef HAVE_sync_compare_and_swapqi
616 if (HAVE_sync_compare_and_swapqi)
617 cpp_define (pfile, "__GCC_HAVE_SYNC_COMPARE_AND_SWAP_1");
620 #ifdef HAVE_sync_compare_and_swaphi
621 if (HAVE_sync_compare_and_swaphi)
622 cpp_define (pfile, "__GCC_HAVE_SYNC_COMPARE_AND_SWAP_2");
625 #ifdef HAVE_sync_compare_and_swapsi
626 if (HAVE_sync_compare_and_swapsi)
627 cpp_define (pfile, "__GCC_HAVE_SYNC_COMPARE_AND_SWAP_4");
630 #ifdef HAVE_sync_compare_and_swapdi
631 if (HAVE_sync_compare_and_swapdi)
632 cpp_define (pfile, "__GCC_HAVE_SYNC_COMPARE_AND_SWAP_8");
635 #ifdef HAVE_sync_compare_and_swapti
636 if (HAVE_sync_compare_and_swapti)
637 cpp_define (pfile, "__GCC_HAVE_SYNC_COMPARE_AND_SWAP_16");
640 /* Make the choice of ObjC runtime visible to source code. */
641 if (c_dialect_objc () && flag_next_runtime)
642 cpp_define (pfile, "__NEXT_RUNTIME__");
644 /* Show the availability of some target pragmas. */
645 if (flag_mudflap || targetm.handle_pragma_redefine_extname)
646 cpp_define (pfile, "__PRAGMA_REDEFINE_EXTNAME");
648 if (targetm.handle_pragma_extern_prefix)
649 cpp_define (pfile, "__PRAGMA_EXTERN_PREFIX");
651 /* Make the choice of the stack protector runtime visible to source code.
652 The macro names and values here were chosen for compatibility with an
653 earlier implementation, i.e. ProPolice. */
654 if (flag_stack_protect == 2)
655 cpp_define (pfile, "__SSP_ALL__=2");
656 else if (flag_stack_protect == 1)
657 cpp_define (pfile, "__SSP__=1");
660 cpp_define (pfile, "_OPENMP=200505");
662 builtin_define_type_sizeof ("__SIZEOF_INT__", integer_type_node);
663 builtin_define_type_sizeof ("__SIZEOF_LONG__", long_integer_type_node);
664 builtin_define_type_sizeof ("__SIZEOF_LONG_LONG__",
665 long_long_integer_type_node);
666 builtin_define_type_sizeof ("__SIZEOF_SHORT__", short_integer_type_node);
667 builtin_define_type_sizeof ("__SIZEOF_FLOAT__", float_type_node);
668 builtin_define_type_sizeof ("__SIZEOF_DOUBLE__", double_type_node);
669 builtin_define_type_sizeof ("__SIZEOF_LONG_DOUBLE__", long_double_type_node);
670 builtin_define_type_sizeof ("__SIZEOF_SIZE_T__", size_type_node);
671 builtin_define_type_sizeof ("__SIZEOF_WCHAR_T__", wchar_type_node);
672 builtin_define_type_sizeof ("__SIZEOF_WINT_T__", wint_type_node);
673 builtin_define_type_sizeof ("__SIZEOF_PTRDIFF_T__",
674 unsigned_ptrdiff_type_node);
675 /* ptr_type_node can't be used here since ptr_mode is only set when
676 toplev calls backend_init which is not done with -E switch. */
677 builtin_define_with_int_value ("__SIZEOF_POINTER__",
678 POINTER_SIZE / BITS_PER_UNIT);
680 /* A straightforward target hook doesn't work, because of problems
681 linking that hook's body when part of non-C front ends. */
682 # define preprocessing_asm_p() (cpp_get_options (pfile)->lang == CLK_ASM)
683 # define preprocessing_trad_p() (cpp_get_options (pfile)->traditional)
684 # define builtin_define(TXT) cpp_define (pfile, TXT)
685 # define builtin_assert(TXT) cpp_assert (pfile, TXT)
686 TARGET_CPU_CPP_BUILTINS ();
687 TARGET_OS_CPP_BUILTINS ();
688 TARGET_OBJFMT_CPP_BUILTINS ();
690 /* Support the __declspec keyword by turning them into attributes.
691 Note that the current way we do this may result in a collision
692 with predefined attributes later on. This can be solved by using
693 one attribute, say __declspec__, and passing args to it. The
694 problem with that approach is that args are not accumulated: each
695 new appearance would clobber any existing args. */
697 builtin_define ("__declspec(x)=__attribute__((x))");
699 /* If decimal floating point is supported, tell the user if the
700 alternate format (BID) is used instead of the standard (DPD)
702 if (ENABLE_DECIMAL_FLOAT && ENABLE_DECIMAL_BID_FORMAT)
703 cpp_define (pfile, "__DECIMAL_BID_FORMAT__");
706 /* Pass an object-like macro. If it doesn't lie in the user's
707 namespace, defines it unconditionally. Otherwise define a version
708 with two leading underscores, and another version with two leading
709 and trailing underscores, and define the original only if an ISO
710 standard was not nominated.
712 e.g. passing "unix" defines "__unix", "__unix__" and possibly
713 "unix". Passing "_mips" defines "__mips", "__mips__" and possibly
716 builtin_define_std (const char *macro)
718 size_t len = strlen (macro);
719 char *buff = (char *) alloca (len + 5);
723 /* prepend __ (or maybe just _) if in user's namespace. */
724 memcpy (p, macro, len + 1);
725 if (!( *p == '_' && (p[1] == '_' || ISUPPER (p[1]))))
732 cpp_define (parse_in, p);
734 /* If it was in user's namespace... */
737 /* Define the macro with leading and following __. */
743 cpp_define (parse_in, p);
745 /* Finally, define the original macro if permitted. */
747 cpp_define (parse_in, macro);
751 /* Pass an object-like macro and a value to define it to. The third
752 parameter says whether or not to turn the value into a string
755 builtin_define_with_value (const char *macro, const char *expansion, int is_str)
758 size_t mlen = strlen (macro);
759 size_t elen = strlen (expansion);
760 size_t extra = 2; /* space for an = and a NUL */
763 extra += 2; /* space for two quote marks */
765 buf = (char *) alloca (mlen + elen + extra);
767 sprintf (buf, "%s=\"%s\"", macro, expansion);
769 sprintf (buf, "%s=%s", macro, expansion);
771 cpp_define (parse_in, buf);
775 /* Pass an object-like macro and an integer value to define it to. */
777 builtin_define_with_int_value (const char *macro, HOST_WIDE_INT value)
780 size_t mlen = strlen (macro);
782 size_t extra = 2; /* space for = and NUL. */
784 buf = (char *) alloca (mlen + vlen + extra);
785 memcpy (buf, macro, mlen);
787 sprintf (buf + mlen + 1, HOST_WIDE_INT_PRINT_DEC, value);
789 cpp_define (parse_in, buf);
792 /* Pass an object-like macro a hexadecimal floating-point value. */
794 builtin_define_with_hex_fp_value (const char *macro,
795 tree type ATTRIBUTE_UNUSED, int digits,
797 const char *fp_suffix,
800 REAL_VALUE_TYPE real;
801 char dec_str[64], buf1[256], buf2[256];
803 /* Hex values are really cool and convenient, except that they're
804 not supported in strict ISO C90 mode. First, the "p-" sequence
805 is not valid as part of a preprocessor number. Second, we get a
806 pedwarn from the preprocessor, which has no context, so we can't
807 suppress the warning with __extension__.
809 So instead what we do is construct the number in hex (because
810 it's easy to get the exact correct value), parse it as a real,
811 then print it back out as decimal. */
813 real_from_string (&real, hex_str);
814 real_to_decimal (dec_str, &real, sizeof (dec_str), digits, 0);
816 /* Assemble the macro in the following fashion
817 macro = fp_cast [dec_str fp_suffix] */
818 sprintf (buf1, "%s%s", dec_str, fp_suffix);
819 sprintf (buf2, fp_cast, buf1);
820 sprintf (buf1, "%s=%s", macro, buf2);
822 cpp_define (parse_in, buf1);
825 /* Define MAX for TYPE based on the precision of the type. IS_LONG is
826 1 for type "long" and 2 for "long long". We have to handle
827 unsigned types, since wchar_t might be unsigned. */
830 builtin_define_type_max (const char *macro, tree type, int is_long)
832 static const char *const values[]
835 "2147483647", "4294967295",
836 "9223372036854775807", "18446744073709551615",
837 "170141183460469231731687303715884105727",
838 "340282366920938463463374607431768211455" };
839 static const char *const suffixes[] = { "", "U", "L", "UL", "LL", "ULL" };
841 const char *value, *suffix;
845 /* Pre-rendering the values mean we don't have to futz with printing a
846 multi-word decimal value. There are also a very limited number of
847 precisions that we support, so it's really a waste of time. */
848 switch (TYPE_PRECISION (type))
850 case 8: idx = 0; break;
851 case 16: idx = 2; break;
852 case 32: idx = 4; break;
853 case 64: idx = 6; break;
854 case 128: idx = 8; break;
855 default: gcc_unreachable ();
858 value = values[idx + TYPE_UNSIGNED (type)];
859 suffix = suffixes[is_long * 2 + TYPE_UNSIGNED (type)];
861 buf = (char *) alloca (strlen (macro) + 1 + strlen (value)
862 + strlen (suffix) + 1);
863 sprintf (buf, "%s=%s%s", macro, value, suffix);
865 cpp_define (parse_in, buf);