1 /* A GNU-like <math.h>.
3 Copyright (C) 2002-2003, 2007-2012 Free Software Foundation, Inc.
5 This program is free software: you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation; either version 3 of the License, or
8 (at your option) any later version.
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with this program. If not, see <http://www.gnu.org/licenses/>. */
18 #ifndef _@GUARD_PREFIX@_MATH_H
21 @PRAGMA_SYSTEM_HEADER@
25 /* The include_next requires a split double-inclusion guard. */
26 #@INCLUDE_NEXT_AS_FIRST_DIRECTIVE@ @NEXT_AS_FIRST_DIRECTIVE_MATH_H@
28 #ifndef _@GUARD_PREFIX@_MATH_H
29 #define _@GUARD_PREFIX@_MATH_H
32 /* The definitions of _GL_FUNCDECL_RPL etc. are copied here. */
34 /* The definition of _GL_ARG_NONNULL is copied here. */
36 /* The definition of _GL_WARN_ON_USE is copied here. */
39 /* Helper macros to define type-generic function FUNC as overloaded functions,
40 rather than as macros like in C. POSIX declares these with an argument of
41 real-floating (that is, one of float, double, or long double). */
42 # define _GL_MATH_CXX_REAL_FLOATING_DECL_1(func) \
44 _gl_cxx_ ## func ## f (float f) \
49 _gl_cxx_ ## func ## d (double d) \
54 _gl_cxx_ ## func ## l (long double l) \
58 # define _GL_MATH_CXX_REAL_FLOATING_DECL_2(func) \
62 return _gl_cxx_ ## func ## f (f); \
67 return _gl_cxx_ ## func ## d (d); \
70 func (long double l) \
72 return _gl_cxx_ ## func ## l (l); \
76 /* Helper macros to define a portability warning for the
77 classification macro FUNC called with VALUE. POSIX declares the
78 classification macros with an argument of real-floating (that is,
79 one of float, double, or long double). */
80 #define _GL_WARN_REAL_FLOATING_DECL(func) \
82 rpl_ ## func ## f (float f) \
87 rpl_ ## func ## d (double d) \
92 rpl_ ## func ## l (long double l) \
96 _GL_WARN_ON_USE (rpl_ ## func ## f, #func " is unportable - " \
97 "use gnulib module " #func " for portability"); \
98 _GL_WARN_ON_USE (rpl_ ## func ## d, #func " is unportable - " \
99 "use gnulib module " #func " for portability"); \
100 _GL_WARN_ON_USE (rpl_ ## func ## l, #func " is unportable - " \
101 "use gnulib module " #func " for portability")
102 #define _GL_WARN_REAL_FLOATING_IMPL(func, value) \
103 (sizeof (value) == sizeof (float) ? rpl_ ## func ## f (value) \
104 : sizeof (value) == sizeof (double) ? rpl_ ## func ## d (value) \
105 : rpl_ ## func ## l (value))
109 /* Pull in a function that fixes the 'int' to 'long double' conversion
111 _GL_EXTERN_C void _Qp_itoq (long double *, int);
112 static void (*_gl_math_fix_itold) (long double *, int) = _Qp_itoq;
116 /* POSIX allows platforms that don't support NAN. But all major
117 machines in the past 15 years have supported something close to
118 IEEE NaN, so we define this unconditionally. We also must define
119 it on platforms like Solaris 10, where NAN is present but defined
120 as a function pointer rather than a floating point constant. */
121 #if !defined NAN || @REPLACE_NAN@
122 # if !GNULIB_defined_NAN
124 /* The Compaq (ex-DEC) C 6.4 compiler and the Microsoft MSVC 9 compiler
125 choke on the expression 0.0 / 0.0. */
126 # if defined __DECC || defined _MSC_VER
130 static float zero = 0.0f;
133 # define NAN (_NaN())
135 # define NAN (0.0f / 0.0f)
137 # define GNULIB_defined_NAN 1
141 /* Solaris 10 defines HUGE_VAL, but as a function pointer rather
142 than a floating point constant. */
143 #if @REPLACE_HUGE_VAL@
145 # define HUGE_VAL (1.0 / 0.0)
152 _GL_FUNCDECL_SYS (acosf, float, (float x));
154 _GL_CXXALIAS_SYS (acosf, float, (float x));
155 _GL_CXXALIASWARN (acosf);
156 #elif defined GNULIB_POSIXCHECK
158 # if HAVE_RAW_DECL_ACOSF
159 _GL_WARN_ON_USE (acosf, "acosf is unportable - "
160 "use gnulib module acosf for portability");
165 # if !@HAVE_ACOSL@ || !@HAVE_DECL_ACOSL@
167 _GL_FUNCDECL_SYS (acosl, long double, (long double x));
169 _GL_CXXALIAS_SYS (acosl, long double, (long double x));
170 _GL_CXXALIASWARN (acosl);
171 #elif defined GNULIB_POSIXCHECK
173 # if HAVE_RAW_DECL_ACOSL
174 _GL_WARN_ON_USE (acosl, "acosl is unportable - "
175 "use gnulib module mathl for portability");
183 _GL_FUNCDECL_SYS (asinf, float, (float x));
185 _GL_CXXALIAS_SYS (asinf, float, (float x));
186 _GL_CXXALIASWARN (asinf);
187 #elif defined GNULIB_POSIXCHECK
189 # if HAVE_RAW_DECL_ASINF
190 _GL_WARN_ON_USE (asinf, "asinf is unportable - "
191 "use gnulib module asinf for portability");
196 # if !@HAVE_ASINL@ || !@HAVE_DECL_ASINL@
198 _GL_FUNCDECL_SYS (asinl, long double, (long double x));
200 _GL_CXXALIAS_SYS (asinl, long double, (long double x));
201 _GL_CXXALIASWARN (asinl);
202 #elif defined GNULIB_POSIXCHECK
204 # if HAVE_RAW_DECL_ASINL
205 _GL_WARN_ON_USE (asinl, "asinl is unportable - "
206 "use gnulib module mathl for portability");
214 _GL_FUNCDECL_SYS (atanf, float, (float x));
216 _GL_CXXALIAS_SYS (atanf, float, (float x));
217 _GL_CXXALIASWARN (atanf);
218 #elif defined GNULIB_POSIXCHECK
220 # if HAVE_RAW_DECL_ATANF
221 _GL_WARN_ON_USE (atanf, "atanf is unportable - "
222 "use gnulib module atanf for portability");
227 # if !@HAVE_ATANL@ || !@HAVE_DECL_ATANL@
229 _GL_FUNCDECL_SYS (atanl, long double, (long double x));
231 _GL_CXXALIAS_SYS (atanl, long double, (long double x));
232 _GL_CXXALIASWARN (atanl);
233 #elif defined GNULIB_POSIXCHECK
235 # if HAVE_RAW_DECL_ATANL
236 _GL_WARN_ON_USE (atanl, "atanl is unportable - "
237 "use gnulib module mathl for portability");
245 _GL_FUNCDECL_SYS (atan2f, float, (float y, float x));
247 _GL_CXXALIAS_SYS (atan2f, float, (float y, float x));
248 _GL_CXXALIASWARN (atan2f);
249 #elif defined GNULIB_POSIXCHECK
251 # if HAVE_RAW_DECL_ATAN2F
252 _GL_WARN_ON_USE (atan2f, "atan2f is unportable - "
253 "use gnulib module atan2f for portability");
260 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
262 # define ceilf rpl_ceilf
264 _GL_FUNCDECL_RPL (ceilf, float, (float x));
265 _GL_CXXALIAS_RPL (ceilf, float, (float x));
267 # if !@HAVE_DECL_CEILF@
269 _GL_FUNCDECL_SYS (ceilf, float, (float x));
271 _GL_CXXALIAS_SYS (ceilf, float, (float x));
273 _GL_CXXALIASWARN (ceilf);
274 #elif defined GNULIB_POSIXCHECK
276 # if HAVE_RAW_DECL_CEILF
277 _GL_WARN_ON_USE (ceilf, "ceilf is unportable - "
278 "use gnulib module ceilf for portability");
284 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
285 # define ceil rpl_ceil
287 _GL_FUNCDECL_RPL (ceil, double, (double x));
288 _GL_CXXALIAS_RPL (ceil, double, (double x));
290 _GL_CXXALIAS_SYS (ceil, double, (double x));
292 _GL_CXXALIASWARN (ceil);
297 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
299 # define ceill rpl_ceill
301 _GL_FUNCDECL_RPL (ceill, long double, (long double x));
302 _GL_CXXALIAS_RPL (ceill, long double, (long double x));
304 # if !@HAVE_DECL_CEILL@
306 _GL_FUNCDECL_SYS (ceill, long double, (long double x));
308 _GL_CXXALIAS_SYS (ceill, long double, (long double x));
310 _GL_CXXALIASWARN (ceill);
311 #elif defined GNULIB_POSIXCHECK
313 # if HAVE_RAW_DECL_CEILL
314 _GL_WARN_ON_USE (ceill, "ceill is unportable - "
315 "use gnulib module ceill for portability");
320 #if @GNULIB_COPYSIGNF@
321 # if !@HAVE_COPYSIGNF@
322 _GL_FUNCDECL_SYS (copysignf, float, (float x, float y));
324 _GL_CXXALIAS_SYS (copysignf, float, (float x, float y));
325 _GL_CXXALIASWARN (copysignf);
326 #elif defined GNULIB_POSIXCHECK
328 # if HAVE_RAW_DECL_COPYSIGNF
329 _GL_WARN_ON_USE (copysignf, "copysignf is unportable - "
330 "use gnulib module copysignf for portability");
334 #if @GNULIB_COPYSIGN@
335 # if !@HAVE_COPYSIGN@
336 _GL_FUNCDECL_SYS (copysign, double, (double x, double y));
338 _GL_CXXALIAS_SYS (copysign, double, (double x, double y));
339 _GL_CXXALIASWARN (copysign);
340 #elif defined GNULIB_POSIXCHECK
342 # if HAVE_RAW_DECL_COPYSIGN
343 _GL_WARN_ON_USE (copysign, "copysign is unportable - "
344 "use gnulib module copysign for portability");
348 #if @GNULIB_COPYSIGNL@
349 # if !@HAVE_COPYSIGNL@
350 _GL_FUNCDECL_SYS (copysignl, long double, (long double x, long double y));
352 _GL_CXXALIAS_SYS (copysignl, long double, (long double x, long double y));
353 _GL_CXXALIASWARN (copysignl);
354 #elif defined GNULIB_POSIXCHECK
356 # if HAVE_RAW_DECL_COPYSIGNL
357 _GL_WARN_ON_USE (copysign, "copysignl is unportable - "
358 "use gnulib module copysignl for portability");
366 _GL_FUNCDECL_SYS (cosf, float, (float x));
368 _GL_CXXALIAS_SYS (cosf, float, (float x));
369 _GL_CXXALIASWARN (cosf);
370 #elif defined GNULIB_POSIXCHECK
372 # if HAVE_RAW_DECL_COSF
373 _GL_WARN_ON_USE (cosf, "cosf is unportable - "
374 "use gnulib module cosf for portability");
379 # if !@HAVE_COSL@ || !@HAVE_DECL_COSL@
381 _GL_FUNCDECL_SYS (cosl, long double, (long double x));
383 _GL_CXXALIAS_SYS (cosl, long double, (long double x));
384 _GL_CXXALIASWARN (cosl);
385 #elif defined GNULIB_POSIXCHECK
387 # if HAVE_RAW_DECL_COSL
388 _GL_WARN_ON_USE (cosl, "cosl is unportable - "
389 "use gnulib module mathl for portability");
397 _GL_FUNCDECL_SYS (coshf, float, (float x));
399 _GL_CXXALIAS_SYS (coshf, float, (float x));
400 _GL_CXXALIASWARN (coshf);
401 #elif defined GNULIB_POSIXCHECK
403 # if HAVE_RAW_DECL_COSHF
404 _GL_WARN_ON_USE (coshf, "coshf is unportable - "
405 "use gnulib module coshf for portability");
413 _GL_FUNCDECL_SYS (expf, float, (float x));
415 _GL_CXXALIAS_SYS (expf, float, (float x));
416 _GL_CXXALIASWARN (expf);
417 #elif defined GNULIB_POSIXCHECK
419 # if HAVE_RAW_DECL_EXPF
420 _GL_WARN_ON_USE (expf, "expf is unportable - "
421 "use gnulib module expf for portability");
426 # if !@HAVE_EXPL@ || !@HAVE_DECL_EXPL@
428 _GL_FUNCDECL_SYS (expl, long double, (long double x));
430 _GL_CXXALIAS_SYS (expl, long double, (long double x));
431 _GL_CXXALIASWARN (expl);
432 #elif defined GNULIB_POSIXCHECK
434 # if HAVE_RAW_DECL_EXPL
435 _GL_WARN_ON_USE (expl, "expl is unportable - "
436 "use gnulib module mathl for portability");
444 _GL_FUNCDECL_SYS (fabsf, float, (float x));
446 _GL_CXXALIAS_SYS (fabsf, float, (float x));
447 _GL_CXXALIASWARN (fabsf);
448 #elif defined GNULIB_POSIXCHECK
450 # if HAVE_RAW_DECL_FABSF
451 _GL_WARN_ON_USE (fabsf, "fabsf is unportable - "
452 "use gnulib module fabsf for portability");
458 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
460 # define fabsl rpl_fabsl
462 _GL_FUNCDECL_RPL (fabsl, long double, (long double x));
463 _GL_CXXALIAS_RPL (fabsl, long double, (long double x));
467 _GL_FUNCDECL_SYS (fabsl, long double, (long double x));
469 _GL_CXXALIAS_SYS (fabsl, long double, (long double x));
471 _GL_CXXALIASWARN (fabsl);
472 #elif defined GNULIB_POSIXCHECK
474 # if HAVE_RAW_DECL_FABSL
475 _GL_WARN_ON_USE (fabsl, "fabsl is unportable - "
476 "use gnulib module fabsl for portability");
482 # if @REPLACE_FLOORF@
483 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
485 # define floorf rpl_floorf
487 _GL_FUNCDECL_RPL (floorf, float, (float x));
488 _GL_CXXALIAS_RPL (floorf, float, (float x));
490 # if !@HAVE_DECL_FLOORF@
492 _GL_FUNCDECL_SYS (floorf, float, (float x));
494 _GL_CXXALIAS_SYS (floorf, float, (float x));
496 _GL_CXXALIASWARN (floorf);
497 #elif defined GNULIB_POSIXCHECK
499 # if HAVE_RAW_DECL_FLOORF
500 _GL_WARN_ON_USE (floorf, "floorf is unportable - "
501 "use gnulib module floorf for portability");
507 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
508 # define floor rpl_floor
510 _GL_FUNCDECL_RPL (floor, double, (double x));
511 _GL_CXXALIAS_RPL (floor, double, (double x));
513 _GL_CXXALIAS_SYS (floor, double, (double x));
515 _GL_CXXALIASWARN (floor);
519 # if @REPLACE_FLOORL@
520 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
522 # define floorl rpl_floorl
524 _GL_FUNCDECL_RPL (floorl, long double, (long double x));
525 _GL_CXXALIAS_RPL (floorl, long double, (long double x));
527 # if !@HAVE_DECL_FLOORL@
529 _GL_FUNCDECL_SYS (floorl, long double, (long double x));
531 _GL_CXXALIAS_SYS (floorl, long double, (long double x));
533 _GL_CXXALIASWARN (floorl);
534 #elif defined GNULIB_POSIXCHECK
536 # if HAVE_RAW_DECL_FLOORL
537 _GL_WARN_ON_USE (floorl, "floorl is unportable - "
538 "use gnulib module floorl for portability");
545 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
547 # define fmaf rpl_fmaf
549 _GL_FUNCDECL_RPL (fmaf, float, (float x, float y, float z));
550 _GL_CXXALIAS_RPL (fmaf, float, (float x, float y, float z));
553 _GL_FUNCDECL_SYS (fmaf, float, (float x, float y, float z));
555 _GL_CXXALIAS_SYS (fmaf, float, (float x, float y, float z));
557 _GL_CXXALIASWARN (fmaf);
558 #elif defined GNULIB_POSIXCHECK
560 # if HAVE_RAW_DECL_FMAF
561 _GL_WARN_ON_USE (fmaf, "fmaf is unportable - "
562 "use gnulib module fmaf for portability");
568 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
572 _GL_FUNCDECL_RPL (fma, double, (double x, double y, double z));
573 _GL_CXXALIAS_RPL (fma, double, (double x, double y, double z));
576 _GL_FUNCDECL_SYS (fma, double, (double x, double y, double z));
578 _GL_CXXALIAS_SYS (fma, double, (double x, double y, double z));
580 _GL_CXXALIASWARN (fma);
581 #elif defined GNULIB_POSIXCHECK
583 # if HAVE_RAW_DECL_FMA
584 _GL_WARN_ON_USE (fma, "fma is unportable - "
585 "use gnulib module fma for portability");
591 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
593 # define fmal rpl_fmal
595 _GL_FUNCDECL_RPL (fmal, long double,
596 (long double x, long double y, long double z));
597 _GL_CXXALIAS_RPL (fmal, long double,
598 (long double x, long double y, long double z));
601 _GL_FUNCDECL_SYS (fmal, long double,
602 (long double x, long double y, long double z));
604 _GL_CXXALIAS_SYS (fmal, long double,
605 (long double x, long double y, long double z));
607 _GL_CXXALIASWARN (fmal);
608 #elif defined GNULIB_POSIXCHECK
610 # if HAVE_RAW_DECL_FMAL
611 _GL_WARN_ON_USE (fmal, "fmal is unportable - "
612 "use gnulib module fmal for portability");
619 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
621 # define fmodf rpl_fmodf
623 _GL_FUNCDECL_RPL (fmodf, float, (float x, float y));
624 _GL_CXXALIAS_RPL (fmodf, float, (float x, float y));
628 _GL_FUNCDECL_SYS (fmodf, float, (float x, float y));
630 _GL_CXXALIAS_SYS (fmodf, float, (float x, float y));
632 _GL_CXXALIASWARN (fmodf);
633 #elif defined GNULIB_POSIXCHECK
635 # if HAVE_RAW_DECL_FMODF
636 _GL_WARN_ON_USE (fmodf, "fmodf is unportable - "
637 "use gnulib module fmodf for portability");
643 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
645 # define fmod rpl_fmod
647 _GL_FUNCDECL_RPL (fmod, double, (double x, double y));
648 _GL_CXXALIAS_RPL (fmod, double, (double x, double y));
650 _GL_CXXALIAS_SYS (fmod, double, (double x, double y));
652 _GL_CXXALIASWARN (fmod);
653 #elif defined GNULIB_POSIXCHECK
655 # if HAVE_RAW_DECL_FMOD
656 _GL_WARN_ON_USE (fmod, "fmod has portability problems - "
657 "use gnulib module fmod for portability");
663 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
665 # define fmodl rpl_fmodl
667 _GL_FUNCDECL_RPL (fmodl, long double, (long double x, long double y));
668 _GL_CXXALIAS_RPL (fmodl, long double, (long double x, long double y));
672 _GL_FUNCDECL_SYS (fmodl, long double, (long double x, long double y));
674 _GL_CXXALIAS_SYS (fmodl, long double, (long double x, long double y));
676 _GL_CXXALIASWARN (fmodl);
677 #elif defined GNULIB_POSIXCHECK
679 # if HAVE_RAW_DECL_FMODL
680 _GL_WARN_ON_USE (fmodl, "fmodl is unportable - "
681 "use gnulib module fmodl for portability");
689 If x finite and nonzero: 0.5 <= |mantissa| < 1.0.
690 If x is zero: mantissa = x, exp = 0.
691 If x is infinite or NaN: mantissa = x, exp unspecified.
692 Store exp in *EXPPTR and return mantissa. */
694 # if @REPLACE_FREXPF@
695 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
697 # define frexpf rpl_frexpf
699 _GL_FUNCDECL_RPL (frexpf, float, (float x, int *expptr) _GL_ARG_NONNULL ((2)));
700 _GL_CXXALIAS_RPL (frexpf, float, (float x, int *expptr));
704 _GL_FUNCDECL_SYS (frexpf, float, (float x, int *expptr) _GL_ARG_NONNULL ((2)));
706 _GL_CXXALIAS_SYS (frexpf, float, (float x, int *expptr));
708 _GL_CXXALIASWARN (frexpf);
709 #elif defined GNULIB_POSIXCHECK
711 # if HAVE_RAW_DECL_FREXPF
712 _GL_WARN_ON_USE (frexpf, "frexpf is unportable - "
713 "use gnulib module frexpf for portability");
720 If x finite and nonzero: 0.5 <= |mantissa| < 1.0.
721 If x is zero: mantissa = x, exp = 0.
722 If x is infinite or NaN: mantissa = x, exp unspecified.
723 Store exp in *EXPPTR and return mantissa. */
726 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
727 # define frexp rpl_frexp
729 _GL_FUNCDECL_RPL (frexp, double, (double x, int *expptr) _GL_ARG_NONNULL ((2)));
730 _GL_CXXALIAS_RPL (frexp, double, (double x, int *expptr));
732 _GL_CXXALIAS_SYS (frexp, double, (double x, int *expptr));
734 _GL_CXXALIASWARN (frexp);
735 #elif defined GNULIB_POSIXCHECK
737 /* Assume frexp is always declared. */
738 _GL_WARN_ON_USE (frexp, "frexp is unportable - "
739 "use gnulib module frexp for portability");
745 If x finite and nonzero: 0.5 <= |mantissa| < 1.0.
746 If x is zero: mantissa = x, exp = 0.
747 If x is infinite or NaN: mantissa = x, exp unspecified.
748 Store exp in *EXPPTR and return mantissa. */
749 #if @GNULIB_FREXPL@ && @REPLACE_FREXPL@
750 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
752 # define frexpl rpl_frexpl
754 _GL_FUNCDECL_RPL (frexpl, long double,
755 (long double x, int *expptr) _GL_ARG_NONNULL ((2)));
756 _GL_CXXALIAS_RPL (frexpl, long double, (long double x, int *expptr));
758 # if !@HAVE_DECL_FREXPL@
759 _GL_FUNCDECL_SYS (frexpl, long double,
760 (long double x, int *expptr) _GL_ARG_NONNULL ((2)));
763 _GL_CXXALIAS_SYS (frexpl, long double, (long double x, int *expptr));
766 #if @GNULIB_FREXPL@ && !(@REPLACE_FREXPL@ && !@HAVE_DECL_FREXPL@)
767 _GL_CXXALIASWARN (frexpl);
769 #if !@GNULIB_FREXPL@ && defined GNULIB_POSIXCHECK
771 # if HAVE_RAW_DECL_FREXPL
772 _GL_WARN_ON_USE (frexpl, "frexpl is unportable - "
773 "use gnulib module frexpl for portability");
778 /* Return x * 2^exp. */
782 _GL_FUNCDECL_SYS (ldexpf, float, (float x, int exp));
784 _GL_CXXALIAS_SYS (ldexpf, float, (float x, int exp));
785 _GL_CXXALIASWARN (ldexpf);
786 #elif defined GNULIB_POSIXCHECK
788 # if HAVE_RAW_DECL_LDEXPF
789 _GL_WARN_ON_USE (ldexpf, "ldexpf is unportable - "
790 "use gnulib module ldexpf for portability");
794 /* Return x * 2^exp. */
795 #if @GNULIB_LDEXPL@ && @REPLACE_LDEXPL@
796 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
798 # define ldexpl rpl_ldexpl
800 _GL_FUNCDECL_RPL (ldexpl, long double, (long double x, int exp));
801 _GL_CXXALIAS_RPL (ldexpl, long double, (long double x, int exp));
803 # if !@HAVE_DECL_LDEXPL@
804 _GL_FUNCDECL_SYS (ldexpl, long double, (long double x, int exp));
807 _GL_CXXALIAS_SYS (ldexpl, long double, (long double x, int exp));
811 _GL_CXXALIASWARN (ldexpl);
813 #if !@GNULIB_LDEXPL@ && defined GNULIB_POSIXCHECK
815 # if HAVE_RAW_DECL_LDEXPL
816 _GL_WARN_ON_USE (ldexpl, "ldexpl is unportable - "
817 "use gnulib module ldexpl for portability");
823 # if !@HAVE_DECL_LOGB@
824 _GL_EXTERN_C double logb (double x);
826 #elif defined GNULIB_POSIXCHECK
828 # if HAVE_RAW_DECL_LOGB
829 _GL_WARN_ON_USE (logb, "logb is unportable - "
830 "use gnulib module logb for portability");
838 _GL_FUNCDECL_SYS (logf, float, (float x));
840 _GL_CXXALIAS_SYS (logf, float, (float x));
841 _GL_CXXALIASWARN (logf);
842 #elif defined GNULIB_POSIXCHECK
844 # if HAVE_RAW_DECL_LOGF
845 _GL_WARN_ON_USE (logf, "logf is unportable - "
846 "use gnulib module logf for portability");
851 # if !@HAVE_LOGL@ || !@HAVE_DECL_LOGL@
853 _GL_FUNCDECL_SYS (logl, long double, (long double x));
855 _GL_CXXALIAS_SYS (logl, long double, (long double x));
856 _GL_CXXALIASWARN (logl);
857 #elif defined GNULIB_POSIXCHECK
859 # if HAVE_RAW_DECL_LOGL
860 _GL_WARN_ON_USE (logl, "logl is unportable - "
861 "use gnulib module mathl for portability");
869 _GL_FUNCDECL_SYS (log10f, float, (float x));
871 _GL_CXXALIAS_SYS (log10f, float, (float x));
872 _GL_CXXALIASWARN (log10f);
873 #elif defined GNULIB_POSIXCHECK
875 # if HAVE_RAW_DECL_LOG10F
876 _GL_WARN_ON_USE (log10f, "log10f is unportable - "
877 "use gnulib module log10f for portability");
882 # if !@HAVE_LOG10L@ || !@HAVE_DECL_LOG10L@
884 _GL_FUNCDECL_SYS (log10l, long double, (long double x));
886 _GL_CXXALIAS_SYS (log10l, long double, (long double x));
887 _GL_CXXALIASWARN (log10l);
888 #elif defined GNULIB_POSIXCHECK
890 # if HAVE_RAW_DECL_LOG10L
891 _GL_WARN_ON_USE (log10l, "log10l is unportable - "
892 "use gnulib module log10l for portability");
899 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
901 # define modff rpl_modff
903 _GL_FUNCDECL_RPL (modff, float, (float x, float *iptr) _GL_ARG_NONNULL ((2)));
904 _GL_CXXALIAS_RPL (modff, float, (float x, float *iptr));
908 _GL_FUNCDECL_SYS (modff, float, (float x, float *iptr) _GL_ARG_NONNULL ((2)));
910 _GL_CXXALIAS_SYS (modff, float, (float x, float *iptr));
912 _GL_CXXALIASWARN (modff);
913 #elif defined GNULIB_POSIXCHECK
915 # if HAVE_RAW_DECL_MODFF
916 _GL_WARN_ON_USE (modff, "modff is unportable - "
917 "use gnulib module modff for portability");
923 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
925 # define modf rpl_modf
927 _GL_FUNCDECL_RPL (modf, double, (double x, double *iptr) _GL_ARG_NONNULL ((2)));
928 _GL_CXXALIAS_RPL (modf, double, (double x, double *iptr));
930 _GL_CXXALIAS_SYS (modf, double, (double x, double *iptr));
932 _GL_CXXALIASWARN (modf);
933 #elif defined GNULIB_POSIXCHECK
935 # if HAVE_RAW_DECL_MODF
936 _GL_WARN_ON_USE (modf, "modf has portability problems - "
937 "use gnulib module modf for portability");
943 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
945 # define modfl rpl_modfl
947 _GL_FUNCDECL_RPL (modfl, long double, (long double x, long double *iptr)
948 _GL_ARG_NONNULL ((2)));
949 _GL_CXXALIAS_RPL (modfl, long double, (long double x, long double *iptr));
953 _GL_FUNCDECL_SYS (modfl, long double, (long double x, long double *iptr)
954 _GL_ARG_NONNULL ((2)));
956 _GL_CXXALIAS_SYS (modfl, long double, (long double x, long double *iptr));
958 _GL_CXXALIASWARN (modfl);
959 #elif defined GNULIB_POSIXCHECK
961 # if HAVE_RAW_DECL_MODFL
962 _GL_WARN_ON_USE (modfl, "modfl is unportable - "
963 "use gnulib module modfl for portability");
971 _GL_FUNCDECL_SYS (powf, float, (float x, float y));
973 _GL_CXXALIAS_SYS (powf, float, (float x, float y));
974 _GL_CXXALIASWARN (powf);
975 #elif defined GNULIB_POSIXCHECK
977 # if HAVE_RAW_DECL_POWF
978 _GL_WARN_ON_USE (powf, "powf is unportable - "
979 "use gnulib module powf for portability");
984 #if @GNULIB_REMAINDERF@
985 # if !@HAVE_REMAINDERF@
986 _GL_FUNCDECL_SYS (remainderf, float, (float x, float y));
988 _GL_CXXALIAS_SYS (remainderf, float, (float x, float y));
989 _GL_CXXALIASWARN (remainderf);
990 #elif defined GNULIB_POSIXCHECK
992 # if HAVE_RAW_DECL_REMAINDERF
993 _GL_WARN_ON_USE (remainderf, "remainderf is unportable - "
994 "use gnulib module remainderf for portability");
998 #if @GNULIB_REMAINDER@
999 # if @REPLACE_REMAINDER@
1000 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
1002 # define remainder rpl_remainder
1004 _GL_FUNCDECL_RPL (remainder, double, (double x, double y));
1005 _GL_CXXALIAS_RPL (remainder, double, (double x, double y));
1007 # if !@HAVE_REMAINDER@ || !@HAVE_DECL_REMAINDER@
1008 _GL_FUNCDECL_SYS (remainder, double, (double x, double y));
1010 _GL_CXXALIAS_SYS (remainder, double, (double x, double y));
1012 _GL_CXXALIASWARN (remainder);
1013 #elif defined GNULIB_POSIXCHECK
1015 # if HAVE_RAW_DECL_REMAINDER
1016 _GL_WARN_ON_USE (remainder, "remainder is unportable - "
1017 "use gnulib module remainder for portability");
1021 #if @GNULIB_REMAINDERL@
1022 # if !@HAVE_REMAINDERL@
1023 _GL_FUNCDECL_SYS (remainderl, long double, (long double x, long double y));
1025 _GL_CXXALIAS_SYS (remainderl, long double, (long double x, long double y));
1026 _GL_CXXALIASWARN (remainderl);
1027 #elif defined GNULIB_POSIXCHECK
1029 # if HAVE_RAW_DECL_REMAINDERL
1030 _GL_WARN_ON_USE (remainderl, "remainderl is unportable - "
1031 "use gnulib module remainderl for portability");
1038 _GL_FUNCDECL_SYS (rintf, float, (float x));
1040 _GL_CXXALIAS_SYS (rintf, float, (float x));
1041 _GL_CXXALIASWARN (rintf);
1042 #elif defined GNULIB_POSIXCHECK
1044 # if HAVE_RAW_DECL_RINTF
1045 _GL_WARN_ON_USE (rintf, "rintf is unportable - "
1046 "use gnulib module rintf for portability");
1052 _GL_FUNCDECL_SYS (rint, double, (double x));
1054 _GL_CXXALIAS_SYS (rint, double, (double x));
1055 _GL_CXXALIASWARN (rint);
1056 #elif defined GNULIB_POSIXCHECK
1058 # if HAVE_RAW_DECL_RINT
1059 _GL_WARN_ON_USE (rint, "rint is unportable - "
1060 "use gnulib module rint for portability");
1066 _GL_FUNCDECL_SYS (rintl, long double, (long double x));
1068 _GL_CXXALIAS_SYS (rintl, long double, (long double x));
1069 _GL_CXXALIASWARN (rintl);
1070 #elif defined GNULIB_POSIXCHECK
1072 # if HAVE_RAW_DECL_RINTL
1073 _GL_WARN_ON_USE (rintl, "rintl is unportable - "
1074 "use gnulib module rintl for portability");
1080 # if @REPLACE_ROUNDF@
1081 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
1083 # define roundf rpl_roundf
1085 _GL_FUNCDECL_RPL (roundf, float, (float x));
1086 _GL_CXXALIAS_RPL (roundf, float, (float x));
1088 # if !@HAVE_DECL_ROUNDF@
1089 _GL_FUNCDECL_SYS (roundf, float, (float x));
1091 _GL_CXXALIAS_SYS (roundf, float, (float x));
1093 _GL_CXXALIASWARN (roundf);
1094 #elif defined GNULIB_POSIXCHECK
1096 # if HAVE_RAW_DECL_ROUNDF
1097 _GL_WARN_ON_USE (roundf, "roundf is unportable - "
1098 "use gnulib module roundf for portability");
1103 # if @REPLACE_ROUND@
1104 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
1106 # define round rpl_round
1108 _GL_FUNCDECL_RPL (round, double, (double x));
1109 _GL_CXXALIAS_RPL (round, double, (double x));
1111 # if !@HAVE_DECL_ROUND@
1112 _GL_FUNCDECL_SYS (round, double, (double x));
1114 _GL_CXXALIAS_SYS (round, double, (double x));
1116 _GL_CXXALIASWARN (round);
1117 #elif defined GNULIB_POSIXCHECK
1119 # if HAVE_RAW_DECL_ROUND
1120 _GL_WARN_ON_USE (round, "round is unportable - "
1121 "use gnulib module round for portability");
1126 # if @REPLACE_ROUNDL@
1127 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
1129 # define roundl rpl_roundl
1131 _GL_FUNCDECL_RPL (roundl, long double, (long double x));
1132 _GL_CXXALIAS_RPL (roundl, long double, (long double x));
1134 # if !@HAVE_DECL_ROUNDL@
1135 _GL_FUNCDECL_SYS (roundl, long double, (long double x));
1137 _GL_CXXALIAS_SYS (roundl, long double, (long double x));
1139 _GL_CXXALIASWARN (roundl);
1140 #elif defined GNULIB_POSIXCHECK
1142 # if HAVE_RAW_DECL_ROUNDL
1143 _GL_WARN_ON_USE (roundl, "roundl is unportable - "
1144 "use gnulib module roundl for portability");
1152 _GL_FUNCDECL_SYS (sinf, float, (float x));
1154 _GL_CXXALIAS_SYS (sinf, float, (float x));
1155 _GL_CXXALIASWARN (sinf);
1156 #elif defined GNULIB_POSIXCHECK
1158 # if HAVE_RAW_DECL_SINF
1159 _GL_WARN_ON_USE (sinf, "sinf is unportable - "
1160 "use gnulib module sinf for portability");
1165 # if !@HAVE_SINL@ || !@HAVE_DECL_SINL@
1167 _GL_FUNCDECL_SYS (sinl, long double, (long double x));
1169 _GL_CXXALIAS_SYS (sinl, long double, (long double x));
1170 _GL_CXXALIASWARN (sinl);
1171 #elif defined GNULIB_POSIXCHECK
1173 # if HAVE_RAW_DECL_SINL
1174 _GL_WARN_ON_USE (sinl, "sinl is unportable - "
1175 "use gnulib module mathl for portability");
1183 _GL_FUNCDECL_SYS (sinhf, float, (float x));
1185 _GL_CXXALIAS_SYS (sinhf, float, (float x));
1186 _GL_CXXALIASWARN (sinhf);
1187 #elif defined GNULIB_POSIXCHECK
1189 # if HAVE_RAW_DECL_SINHF
1190 _GL_WARN_ON_USE (sinhf, "sinhf is unportable - "
1191 "use gnulib module sinhf for portability");
1199 _GL_FUNCDECL_SYS (sqrtf, float, (float x));
1201 _GL_CXXALIAS_SYS (sqrtf, float, (float x));
1202 _GL_CXXALIASWARN (sqrtf);
1203 #elif defined GNULIB_POSIXCHECK
1205 # if HAVE_RAW_DECL_SQRTF
1206 _GL_WARN_ON_USE (sqrtf, "sqrtf is unportable - "
1207 "use gnulib module sqrtf for portability");
1212 # if !@HAVE_SQRTL@ || !@HAVE_DECL_SQRTL@
1214 _GL_FUNCDECL_SYS (sqrtl, long double, (long double x));
1216 _GL_CXXALIAS_SYS (sqrtl, long double, (long double x));
1217 _GL_CXXALIASWARN (sqrtl);
1218 #elif defined GNULIB_POSIXCHECK
1220 # if HAVE_RAW_DECL_SQRTL
1221 _GL_WARN_ON_USE (sqrtl, "sqrtl is unportable - "
1222 "use gnulib module mathl for portability");
1230 _GL_FUNCDECL_SYS (tanf, float, (float x));
1232 _GL_CXXALIAS_SYS (tanf, float, (float x));
1233 _GL_CXXALIASWARN (tanf);
1234 #elif defined GNULIB_POSIXCHECK
1236 # if HAVE_RAW_DECL_TANF
1237 _GL_WARN_ON_USE (tanf, "tanf is unportable - "
1238 "use gnulib module tanf for portability");
1243 # if !@HAVE_TANL@ || !@HAVE_DECL_TANL@
1245 _GL_FUNCDECL_SYS (tanl, long double, (long double x));
1247 _GL_CXXALIAS_SYS (tanl, long double, (long double x));
1248 _GL_CXXALIASWARN (tanl);
1249 #elif defined GNULIB_POSIXCHECK
1251 # if HAVE_RAW_DECL_TANL
1252 _GL_WARN_ON_USE (tanl, "tanl is unportable - "
1253 "use gnulib module mathl for portability");
1261 _GL_FUNCDECL_SYS (tanhf, float, (float x));
1263 _GL_CXXALIAS_SYS (tanhf, float, (float x));
1264 _GL_CXXALIASWARN (tanhf);
1265 #elif defined GNULIB_POSIXCHECK
1267 # if HAVE_RAW_DECL_TANHF
1268 _GL_WARN_ON_USE (tanhf, "tanhf is unportable - "
1269 "use gnulib module tanhf for portability");
1275 # if @REPLACE_TRUNCF@
1276 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
1277 # define truncf rpl_truncf
1279 _GL_FUNCDECL_RPL (truncf, float, (float x));
1280 _GL_CXXALIAS_RPL (truncf, float, (float x));
1282 # if !@HAVE_DECL_TRUNCF@
1283 _GL_FUNCDECL_SYS (truncf, float, (float x));
1285 _GL_CXXALIAS_SYS (truncf, float, (float x));
1287 _GL_CXXALIASWARN (truncf);
1288 #elif defined GNULIB_POSIXCHECK
1290 # if HAVE_RAW_DECL_TRUNCF
1291 _GL_WARN_ON_USE (truncf, "truncf is unportable - "
1292 "use gnulib module truncf for portability");
1297 # if @REPLACE_TRUNC@
1298 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
1299 # define trunc rpl_trunc
1301 _GL_FUNCDECL_RPL (trunc, double, (double x));
1302 _GL_CXXALIAS_RPL (trunc, double, (double x));
1304 # if !@HAVE_DECL_TRUNC@
1305 _GL_FUNCDECL_SYS (trunc, double, (double x));
1307 _GL_CXXALIAS_SYS (trunc, double, (double x));
1309 _GL_CXXALIASWARN (trunc);
1310 #elif defined GNULIB_POSIXCHECK
1312 # if HAVE_RAW_DECL_TRUNC
1313 _GL_WARN_ON_USE (trunc, "trunc is unportable - "
1314 "use gnulib module trunc for portability");
1319 # if @REPLACE_TRUNCL@
1320 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
1322 # define truncl rpl_truncl
1324 _GL_FUNCDECL_RPL (truncl, long double, (long double x));
1325 _GL_CXXALIAS_RPL (truncl, long double, (long double x));
1327 # if !@HAVE_DECL_TRUNCL@
1328 _GL_FUNCDECL_SYS (truncl, long double, (long double x));
1330 _GL_CXXALIAS_SYS (truncl, long double, (long double x));
1332 _GL_CXXALIASWARN (truncl);
1333 #elif defined GNULIB_POSIXCHECK
1335 # if HAVE_RAW_DECL_TRUNCL
1336 _GL_WARN_ON_USE (truncl, "truncl is unportable - "
1337 "use gnulib module truncl for portability");
1342 /* Definitions of function-like macros come here, after the function
1346 #if @GNULIB_ISFINITE@
1347 # if @REPLACE_ISFINITE@
1348 _GL_EXTERN_C int gl_isfinitef (float x);
1349 _GL_EXTERN_C int gl_isfinited (double x);
1350 _GL_EXTERN_C int gl_isfinitel (long double x);
1352 # define isfinite(x) \
1353 (sizeof (x) == sizeof (long double) ? gl_isfinitel (x) : \
1354 sizeof (x) == sizeof (double) ? gl_isfinited (x) : \
1359 _GL_MATH_CXX_REAL_FLOATING_DECL_1 (isfinite)
1361 _GL_MATH_CXX_REAL_FLOATING_DECL_2 (isfinite)
1364 #elif defined GNULIB_POSIXCHECK
1365 # if defined isfinite
1366 _GL_WARN_REAL_FLOATING_DECL (isfinite);
1368 # define isfinite(x) _GL_WARN_REAL_FLOATING_IMPL (isfinite, x)
1374 # if @REPLACE_ISINF@
1375 _GL_EXTERN_C int gl_isinff (float x);
1376 _GL_EXTERN_C int gl_isinfd (double x);
1377 _GL_EXTERN_C int gl_isinfl (long double x);
1380 (sizeof (x) == sizeof (long double) ? gl_isinfl (x) : \
1381 sizeof (x) == sizeof (double) ? gl_isinfd (x) : \
1386 _GL_MATH_CXX_REAL_FLOATING_DECL_1 (isinf)
1388 _GL_MATH_CXX_REAL_FLOATING_DECL_2 (isinf)
1391 #elif defined GNULIB_POSIXCHECK
1393 _GL_WARN_REAL_FLOATING_DECL (isinf);
1395 # define isinf(x) _GL_WARN_REAL_FLOATING_IMPL (isinf, x)
1401 /* Test for NaN for 'float' numbers. */
1403 /* The original <math.h> included above provides a declaration of isnan macro
1404 or (older) isnanf function. */
1406 /* GCC 4.0 and newer provides three built-ins for isnan. */
1408 # define isnanf(x) __builtin_isnanf ((float)(x))
1409 # elif defined isnan
1411 # define isnanf(x) isnan ((float)(x))
1414 /* Test whether X is a NaN. */
1416 # define isnanf rpl_isnanf
1417 _GL_EXTERN_C int isnanf (float x);
1422 /* Test for NaN for 'double' numbers.
1423 This function is a gnulib extension, unlike isnan() which applied only
1424 to 'double' numbers earlier but now is a type-generic macro. */
1426 /* The original <math.h> included above provides a declaration of isnan
1429 /* GCC 4.0 and newer provides three built-ins for isnan. */
1431 # define isnand(x) __builtin_isnan ((double)(x))
1434 # define isnand(x) isnan ((double)(x))
1437 /* Test whether X is a NaN. */
1439 # define isnand rpl_isnand
1440 _GL_EXTERN_C int isnand (double x);
1445 /* Test for NaN for 'long double' numbers. */
1447 /* The original <math.h> included above provides a declaration of isnan
1448 macro or (older) isnanl function. */
1450 /* GCC 4.0 and newer provides three built-ins for isnan. */
1452 # define isnanl(x) __builtin_isnanl ((long double)(x))
1453 # elif defined isnan
1455 # define isnanl(x) isnan ((long double)(x))
1458 /* Test whether X is a NaN. */
1460 # define isnanl rpl_isnanl
1461 _GL_EXTERN_C int isnanl (long double x) _GL_ATTRIBUTE_CONST;
1465 /* This must come *after* the snippets for GNULIB_ISNANF and GNULIB_ISNANL! */
1467 # if @REPLACE_ISNAN@
1468 /* We can't just use the isnanf macro (e.g.) as exposed by
1469 isnanf.h (e.g.) here, because those may end up being macros
1470 that recursively expand back to isnan. So use the gnulib
1471 replacements for them directly. */
1472 # if @HAVE_ISNANF@ && __GNUC__ >= 4
1473 # define gl_isnan_f(x) __builtin_isnanf ((float)(x))
1475 _GL_EXTERN_C int rpl_isnanf (float x);
1476 # define gl_isnan_f(x) rpl_isnanf (x)
1478 # if @HAVE_ISNAND@ && __GNUC__ >= 4
1479 # define gl_isnan_d(x) __builtin_isnan ((double)(x))
1481 _GL_EXTERN_C int rpl_isnand (double x);
1482 # define gl_isnan_d(x) rpl_isnand (x)
1484 # if @HAVE_ISNANL@ && __GNUC__ >= 4
1485 # define gl_isnan_l(x) __builtin_isnanl ((long double)(x))
1487 _GL_EXTERN_C int rpl_isnanl (long double x) _GL_ATTRIBUTE_CONST;
1488 # define gl_isnan_l(x) rpl_isnanl (x)
1492 (sizeof (x) == sizeof (long double) ? gl_isnan_l (x) : \
1493 sizeof (x) == sizeof (double) ? gl_isnan_d (x) : \
1495 # elif __GNUC__ >= 4
1498 (sizeof (x) == sizeof (long double) ? __builtin_isnanl ((long double)(x)) : \
1499 sizeof (x) == sizeof (double) ? __builtin_isnan ((double)(x)) : \
1500 __builtin_isnanf ((float)(x)))
1504 _GL_MATH_CXX_REAL_FLOATING_DECL_1 (isnan)
1506 _GL_MATH_CXX_REAL_FLOATING_DECL_2 (isnan)
1509 /* Ensure isnan is a macro. */
1511 # define isnan isnan
1514 #elif defined GNULIB_POSIXCHECK
1516 _GL_WARN_REAL_FLOATING_DECL (isnan);
1518 # define isnan(x) _GL_WARN_REAL_FLOATING_IMPL (isnan, x)
1523 #if @GNULIB_SIGNBIT@
1524 # if @REPLACE_SIGNBIT_USING_GCC@
1526 /* GCC 4.0 and newer provides three built-ins for signbit. */
1527 # define signbit(x) \
1528 (sizeof (x) == sizeof (long double) ? __builtin_signbitl (x) : \
1529 sizeof (x) == sizeof (double) ? __builtin_signbit (x) : \
1530 __builtin_signbitf (x))
1532 # if @REPLACE_SIGNBIT@
1534 _GL_EXTERN_C int gl_signbitf (float arg);
1535 _GL_EXTERN_C int gl_signbitd (double arg);
1536 _GL_EXTERN_C int gl_signbitl (long double arg);
1537 # if __GNUC__ >= 2 && !defined __STRICT_ANSI__
1538 # define _GL_NUM_UINT_WORDS(type) \
1539 ((sizeof (type) + sizeof (unsigned int) - 1) / sizeof (unsigned int))
1540 # if defined FLT_SIGNBIT_WORD && defined FLT_SIGNBIT_BIT && !defined gl_signbitf
1541 # define gl_signbitf_OPTIMIZED_MACRO
1542 # define gl_signbitf(arg) \
1543 ({ union { float _value; \
1544 unsigned int _word[_GL_NUM_UINT_WORDS (float)]; \
1546 _m._value = (arg); \
1547 (_m._word[FLT_SIGNBIT_WORD] >> FLT_SIGNBIT_BIT) & 1; \
1550 # if defined DBL_SIGNBIT_WORD && defined DBL_SIGNBIT_BIT && !defined gl_signbitd
1551 # define gl_signbitd_OPTIMIZED_MACRO
1552 # define gl_signbitd(arg) \
1553 ({ union { double _value; \
1554 unsigned int _word[_GL_NUM_UINT_WORDS (double)]; \
1556 _m._value = (arg); \
1557 (_m._word[DBL_SIGNBIT_WORD] >> DBL_SIGNBIT_BIT) & 1; \
1560 # if defined LDBL_SIGNBIT_WORD && defined LDBL_SIGNBIT_BIT && !defined gl_signbitl
1561 # define gl_signbitl_OPTIMIZED_MACRO
1562 # define gl_signbitl(arg) \
1563 ({ union { long double _value; \
1564 unsigned int _word[_GL_NUM_UINT_WORDS (long double)]; \
1566 _m._value = (arg); \
1567 (_m._word[LDBL_SIGNBIT_WORD] >> LDBL_SIGNBIT_BIT) & 1; \
1571 # define signbit(x) \
1572 (sizeof (x) == sizeof (long double) ? gl_signbitl (x) : \
1573 sizeof (x) == sizeof (double) ? gl_signbitd (x) : \
1578 _GL_MATH_CXX_REAL_FLOATING_DECL_1 (signbit)
1580 _GL_MATH_CXX_REAL_FLOATING_DECL_2 (signbit)
1583 #elif defined GNULIB_POSIXCHECK
1584 # if defined signbit
1585 _GL_WARN_REAL_FLOATING_DECL (signbit);
1587 # define signbit(x) _GL_WARN_REAL_FLOATING_IMPL (signbit, x)
1592 #endif /* _@GUARD_PREFIX@_MATH_H */
1593 #endif /* _@GUARD_PREFIX@_MATH_H */