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");
620 _GL_FUNCDECL_SYS (fmodf, float, (float x, float y));
622 _GL_CXXALIAS_SYS (fmodf, float, (float x, float y));
623 _GL_CXXALIASWARN (fmodf);
624 #elif defined GNULIB_POSIXCHECK
626 # if HAVE_RAW_DECL_FMODF
627 _GL_WARN_ON_USE (fmodf, "fmodf is unportable - "
628 "use gnulib module fmodf for portability");
634 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
636 # define fmod rpl_fmod
638 _GL_FUNCDECL_RPL (fmod, double, (double x, double y));
639 _GL_CXXALIAS_RPL (fmod, double, (double x, double y));
641 _GL_CXXALIAS_SYS (fmod, double, (double x, double y));
643 _GL_CXXALIASWARN (fmod);
644 #elif defined GNULIB_POSIXCHECK
646 # if HAVE_RAW_DECL_FMOD
647 _GL_WARN_ON_USE (fmod, "fmod has portability problems - "
648 "use gnulib module fmod for portability");
654 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
656 # define fmodl rpl_fmodl
658 _GL_FUNCDECL_RPL (fmodl, long double, (long double x, long double y));
659 _GL_CXXALIAS_RPL (fmodl, long double, (long double x, long double y));
663 _GL_FUNCDECL_SYS (fmodl, long double, (long double x, long double y));
665 _GL_CXXALIAS_SYS (fmodl, long double, (long double x, long double y));
667 _GL_CXXALIASWARN (fmodl);
668 #elif defined GNULIB_POSIXCHECK
670 # if HAVE_RAW_DECL_FMODL
671 _GL_WARN_ON_USE (fmodl, "fmodl is unportable - "
672 "use gnulib module fmodl for portability");
680 If x finite and nonzero: 0.5 <= |mantissa| < 1.0.
681 If x is zero: mantissa = x, exp = 0.
682 If x is infinite or NaN: mantissa = x, exp unspecified.
683 Store exp in *EXPPTR and return mantissa. */
685 # if @REPLACE_FREXPF@
686 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
688 # define frexpf rpl_frexpf
690 _GL_FUNCDECL_RPL (frexpf, float, (float x, int *expptr) _GL_ARG_NONNULL ((2)));
691 _GL_CXXALIAS_RPL (frexpf, float, (float x, int *expptr));
695 _GL_FUNCDECL_SYS (frexpf, float, (float x, int *expptr) _GL_ARG_NONNULL ((2)));
697 _GL_CXXALIAS_SYS (frexpf, float, (float x, int *expptr));
699 _GL_CXXALIASWARN (frexpf);
700 #elif defined GNULIB_POSIXCHECK
702 # if HAVE_RAW_DECL_FREXPF
703 _GL_WARN_ON_USE (frexpf, "frexpf is unportable - "
704 "use gnulib module frexpf for portability");
711 If x finite and nonzero: 0.5 <= |mantissa| < 1.0.
712 If x is zero: mantissa = x, exp = 0.
713 If x is infinite or NaN: mantissa = x, exp unspecified.
714 Store exp in *EXPPTR and return mantissa. */
717 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
718 # define frexp rpl_frexp
720 _GL_FUNCDECL_RPL (frexp, double, (double x, int *expptr) _GL_ARG_NONNULL ((2)));
721 _GL_CXXALIAS_RPL (frexp, double, (double x, int *expptr));
723 _GL_CXXALIAS_SYS (frexp, double, (double x, int *expptr));
725 _GL_CXXALIASWARN (frexp);
726 #elif defined GNULIB_POSIXCHECK
728 /* Assume frexp is always declared. */
729 _GL_WARN_ON_USE (frexp, "frexp is unportable - "
730 "use gnulib module frexp for portability");
736 If x finite and nonzero: 0.5 <= |mantissa| < 1.0.
737 If x is zero: mantissa = x, exp = 0.
738 If x is infinite or NaN: mantissa = x, exp unspecified.
739 Store exp in *EXPPTR and return mantissa. */
740 #if @GNULIB_FREXPL@ && @REPLACE_FREXPL@
741 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
743 # define frexpl rpl_frexpl
745 _GL_FUNCDECL_RPL (frexpl, long double,
746 (long double x, int *expptr) _GL_ARG_NONNULL ((2)));
747 _GL_CXXALIAS_RPL (frexpl, long double, (long double x, int *expptr));
749 # if !@HAVE_DECL_FREXPL@
750 _GL_FUNCDECL_SYS (frexpl, long double,
751 (long double x, int *expptr) _GL_ARG_NONNULL ((2)));
754 _GL_CXXALIAS_SYS (frexpl, long double, (long double x, int *expptr));
757 #if @GNULIB_FREXPL@ && !(@REPLACE_FREXPL@ && !@HAVE_DECL_FREXPL@)
758 _GL_CXXALIASWARN (frexpl);
760 #if !@GNULIB_FREXPL@ && defined GNULIB_POSIXCHECK
762 # if HAVE_RAW_DECL_FREXPL
763 _GL_WARN_ON_USE (frexpl, "frexpl is unportable - "
764 "use gnulib module frexpl for portability");
769 /* Return x * 2^exp. */
773 _GL_FUNCDECL_SYS (ldexpf, float, (float x, int exp));
775 _GL_CXXALIAS_SYS (ldexpf, float, (float x, int exp));
776 _GL_CXXALIASWARN (ldexpf);
777 #elif defined GNULIB_POSIXCHECK
779 # if HAVE_RAW_DECL_LDEXPF
780 _GL_WARN_ON_USE (ldexpf, "ldexpf is unportable - "
781 "use gnulib module ldexpf for portability");
785 /* Return x * 2^exp. */
786 #if @GNULIB_LDEXPL@ && @REPLACE_LDEXPL@
787 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
789 # define ldexpl rpl_ldexpl
791 _GL_FUNCDECL_RPL (ldexpl, long double, (long double x, int exp));
792 _GL_CXXALIAS_RPL (ldexpl, long double, (long double x, int exp));
794 # if !@HAVE_DECL_LDEXPL@
795 _GL_FUNCDECL_SYS (ldexpl, long double, (long double x, int exp));
798 _GL_CXXALIAS_SYS (ldexpl, long double, (long double x, int exp));
802 _GL_CXXALIASWARN (ldexpl);
804 #if !@GNULIB_LDEXPL@ && defined GNULIB_POSIXCHECK
806 # if HAVE_RAW_DECL_LDEXPL
807 _GL_WARN_ON_USE (ldexpl, "ldexpl is unportable - "
808 "use gnulib module ldexpl for portability");
814 # if !@HAVE_DECL_LOGB@
815 _GL_EXTERN_C double logb (double x);
817 #elif defined GNULIB_POSIXCHECK
819 # if HAVE_RAW_DECL_LOGB
820 _GL_WARN_ON_USE (logb, "logb is unportable - "
821 "use gnulib module logb for portability");
829 _GL_FUNCDECL_SYS (logf, float, (float x));
831 _GL_CXXALIAS_SYS (logf, float, (float x));
832 _GL_CXXALIASWARN (logf);
833 #elif defined GNULIB_POSIXCHECK
835 # if HAVE_RAW_DECL_LOGF
836 _GL_WARN_ON_USE (logf, "logf is unportable - "
837 "use gnulib module logf for portability");
842 # if !@HAVE_LOGL@ || !@HAVE_DECL_LOGL@
844 _GL_FUNCDECL_SYS (logl, long double, (long double x));
846 _GL_CXXALIAS_SYS (logl, long double, (long double x));
847 _GL_CXXALIASWARN (logl);
848 #elif defined GNULIB_POSIXCHECK
850 # if HAVE_RAW_DECL_LOGL
851 _GL_WARN_ON_USE (logl, "logl is unportable - "
852 "use gnulib module mathl for portability");
860 _GL_FUNCDECL_SYS (log10f, float, (float x));
862 _GL_CXXALIAS_SYS (log10f, float, (float x));
863 _GL_CXXALIASWARN (log10f);
864 #elif defined GNULIB_POSIXCHECK
866 # if HAVE_RAW_DECL_LOG10F
867 _GL_WARN_ON_USE (log10f, "log10f is unportable - "
868 "use gnulib module log10f for portability");
873 # if !@HAVE_LOG10L@ || !@HAVE_DECL_LOG10L@
875 _GL_FUNCDECL_SYS (log10l, long double, (long double x));
877 _GL_CXXALIAS_SYS (log10l, long double, (long double x));
878 _GL_CXXALIASWARN (log10l);
879 #elif defined GNULIB_POSIXCHECK
881 # if HAVE_RAW_DECL_LOG10L
882 _GL_WARN_ON_USE (log10l, "log10l is unportable - "
883 "use gnulib module log10l for portability");
890 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
892 # define modff rpl_modff
894 _GL_FUNCDECL_RPL (modff, float, (float x, float *iptr) _GL_ARG_NONNULL ((2)));
895 _GL_CXXALIAS_RPL (modff, float, (float x, float *iptr));
899 _GL_FUNCDECL_SYS (modff, float, (float x, float *iptr) _GL_ARG_NONNULL ((2)));
901 _GL_CXXALIAS_SYS (modff, float, (float x, float *iptr));
903 _GL_CXXALIASWARN (modff);
904 #elif defined GNULIB_POSIXCHECK
906 # if HAVE_RAW_DECL_MODFF
907 _GL_WARN_ON_USE (modff, "modff is unportable - "
908 "use gnulib module modff for portability");
914 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
916 # define modf rpl_modf
918 _GL_FUNCDECL_RPL (modf, double, (double x, double *iptr) _GL_ARG_NONNULL ((2)));
919 _GL_CXXALIAS_RPL (modf, double, (double x, double *iptr));
921 _GL_CXXALIAS_SYS (modf, double, (double x, double *iptr));
923 _GL_CXXALIASWARN (modf);
924 #elif defined GNULIB_POSIXCHECK
926 # if HAVE_RAW_DECL_MODF
927 _GL_WARN_ON_USE (modf, "modf has portability problems - "
928 "use gnulib module modf for portability");
934 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
936 # define modfl rpl_modfl
938 _GL_FUNCDECL_RPL (modfl, long double, (long double x, long double *iptr)
939 _GL_ARG_NONNULL ((2)));
940 _GL_CXXALIAS_RPL (modfl, long double, (long double x, long double *iptr));
944 _GL_FUNCDECL_SYS (modfl, long double, (long double x, long double *iptr)
945 _GL_ARG_NONNULL ((2)));
947 _GL_CXXALIAS_SYS (modfl, long double, (long double x, long double *iptr));
949 _GL_CXXALIASWARN (modfl);
950 #elif defined GNULIB_POSIXCHECK
952 # if HAVE_RAW_DECL_MODFL
953 _GL_WARN_ON_USE (modfl, "modfl is unportable - "
954 "use gnulib module modfl for portability");
962 _GL_FUNCDECL_SYS (powf, float, (float x, float y));
964 _GL_CXXALIAS_SYS (powf, float, (float x, float y));
965 _GL_CXXALIASWARN (powf);
966 #elif defined GNULIB_POSIXCHECK
968 # if HAVE_RAW_DECL_POWF
969 _GL_WARN_ON_USE (powf, "powf is unportable - "
970 "use gnulib module powf for portability");
975 #if @GNULIB_REMAINDERF@
976 # if !@HAVE_REMAINDERF@
977 _GL_FUNCDECL_SYS (remainderf, float, (float x, float y));
979 _GL_CXXALIAS_SYS (remainderf, float, (float x, float y));
980 _GL_CXXALIASWARN (remainderf);
981 #elif defined GNULIB_POSIXCHECK
983 # if HAVE_RAW_DECL_REMAINDERF
984 _GL_WARN_ON_USE (remainderf, "remainderf is unportable - "
985 "use gnulib module remainderf for portability");
989 #if @GNULIB_REMAINDER@
990 # if !@HAVE_REMAINDER@ || !@HAVE_DECL_REMAINDER@
991 _GL_FUNCDECL_SYS (remainder, double, (double x, double y));
993 _GL_CXXALIAS_SYS (remainder, double, (double x, double y));
994 _GL_CXXALIASWARN (remainder);
995 #elif defined GNULIB_POSIXCHECK
997 # if HAVE_RAW_DECL_REMAINDER
998 _GL_WARN_ON_USE (remainder, "remainder is unportable - "
999 "use gnulib module remainder for portability");
1003 #if @GNULIB_REMAINDERL@
1004 # if !@HAVE_REMAINDERL@
1005 _GL_FUNCDECL_SYS (remainderl, long double, (long double x, long double y));
1007 _GL_CXXALIAS_SYS (remainderl, long double, (long double x, long double y));
1008 _GL_CXXALIASWARN (remainderl);
1009 #elif defined GNULIB_POSIXCHECK
1011 # if HAVE_RAW_DECL_REMAINDERL
1012 _GL_WARN_ON_USE (remainderl, "remainderl is unportable - "
1013 "use gnulib module remainderl for portability");
1020 _GL_FUNCDECL_SYS (rintf, float, (float x));
1022 _GL_CXXALIAS_SYS (rintf, float, (float x));
1023 _GL_CXXALIASWARN (rintf);
1024 #elif defined GNULIB_POSIXCHECK
1026 # if HAVE_RAW_DECL_RINTF
1027 _GL_WARN_ON_USE (rintf, "rintf is unportable - "
1028 "use gnulib module rintf for portability");
1034 _GL_FUNCDECL_SYS (rint, double, (double x));
1036 _GL_CXXALIAS_SYS (rint, double, (double x));
1037 _GL_CXXALIASWARN (rint);
1038 #elif defined GNULIB_POSIXCHECK
1040 # if HAVE_RAW_DECL_RINT
1041 _GL_WARN_ON_USE (rint, "rint is unportable - "
1042 "use gnulib module rint for portability");
1048 _GL_FUNCDECL_SYS (rintl, long double, (long double x));
1050 _GL_CXXALIAS_SYS (rintl, long double, (long double x));
1051 _GL_CXXALIASWARN (rintl);
1052 #elif defined GNULIB_POSIXCHECK
1054 # if HAVE_RAW_DECL_RINTL
1055 _GL_WARN_ON_USE (rintl, "rintl is unportable - "
1056 "use gnulib module rintl for portability");
1062 # if @REPLACE_ROUNDF@
1063 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
1065 # define roundf rpl_roundf
1067 _GL_FUNCDECL_RPL (roundf, float, (float x));
1068 _GL_CXXALIAS_RPL (roundf, float, (float x));
1070 # if !@HAVE_DECL_ROUNDF@
1071 _GL_FUNCDECL_SYS (roundf, float, (float x));
1073 _GL_CXXALIAS_SYS (roundf, float, (float x));
1075 _GL_CXXALIASWARN (roundf);
1076 #elif defined GNULIB_POSIXCHECK
1078 # if HAVE_RAW_DECL_ROUNDF
1079 _GL_WARN_ON_USE (roundf, "roundf is unportable - "
1080 "use gnulib module roundf for portability");
1085 # if @REPLACE_ROUND@
1086 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
1088 # define round rpl_round
1090 _GL_FUNCDECL_RPL (round, double, (double x));
1091 _GL_CXXALIAS_RPL (round, double, (double x));
1093 # if !@HAVE_DECL_ROUND@
1094 _GL_FUNCDECL_SYS (round, double, (double x));
1096 _GL_CXXALIAS_SYS (round, double, (double x));
1098 _GL_CXXALIASWARN (round);
1099 #elif defined GNULIB_POSIXCHECK
1101 # if HAVE_RAW_DECL_ROUND
1102 _GL_WARN_ON_USE (round, "round is unportable - "
1103 "use gnulib module round for portability");
1108 # if @REPLACE_ROUNDL@
1109 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
1111 # define roundl rpl_roundl
1113 _GL_FUNCDECL_RPL (roundl, long double, (long double x));
1114 _GL_CXXALIAS_RPL (roundl, long double, (long double x));
1116 # if !@HAVE_DECL_ROUNDL@
1117 _GL_FUNCDECL_SYS (roundl, long double, (long double x));
1119 _GL_CXXALIAS_SYS (roundl, long double, (long double x));
1121 _GL_CXXALIASWARN (roundl);
1122 #elif defined GNULIB_POSIXCHECK
1124 # if HAVE_RAW_DECL_ROUNDL
1125 _GL_WARN_ON_USE (roundl, "roundl is unportable - "
1126 "use gnulib module roundl for portability");
1134 _GL_FUNCDECL_SYS (sinf, float, (float x));
1136 _GL_CXXALIAS_SYS (sinf, float, (float x));
1137 _GL_CXXALIASWARN (sinf);
1138 #elif defined GNULIB_POSIXCHECK
1140 # if HAVE_RAW_DECL_SINF
1141 _GL_WARN_ON_USE (sinf, "sinf is unportable - "
1142 "use gnulib module sinf for portability");
1147 # if !@HAVE_SINL@ || !@HAVE_DECL_SINL@
1149 _GL_FUNCDECL_SYS (sinl, long double, (long double x));
1151 _GL_CXXALIAS_SYS (sinl, long double, (long double x));
1152 _GL_CXXALIASWARN (sinl);
1153 #elif defined GNULIB_POSIXCHECK
1155 # if HAVE_RAW_DECL_SINL
1156 _GL_WARN_ON_USE (sinl, "sinl is unportable - "
1157 "use gnulib module mathl for portability");
1165 _GL_FUNCDECL_SYS (sinhf, float, (float x));
1167 _GL_CXXALIAS_SYS (sinhf, float, (float x));
1168 _GL_CXXALIASWARN (sinhf);
1169 #elif defined GNULIB_POSIXCHECK
1171 # if HAVE_RAW_DECL_SINHF
1172 _GL_WARN_ON_USE (sinhf, "sinhf is unportable - "
1173 "use gnulib module sinhf for portability");
1181 _GL_FUNCDECL_SYS (sqrtf, float, (float x));
1183 _GL_CXXALIAS_SYS (sqrtf, float, (float x));
1184 _GL_CXXALIASWARN (sqrtf);
1185 #elif defined GNULIB_POSIXCHECK
1187 # if HAVE_RAW_DECL_SQRTF
1188 _GL_WARN_ON_USE (sqrtf, "sqrtf is unportable - "
1189 "use gnulib module sqrtf for portability");
1194 # if !@HAVE_SQRTL@ || !@HAVE_DECL_SQRTL@
1196 _GL_FUNCDECL_SYS (sqrtl, long double, (long double x));
1198 _GL_CXXALIAS_SYS (sqrtl, long double, (long double x));
1199 _GL_CXXALIASWARN (sqrtl);
1200 #elif defined GNULIB_POSIXCHECK
1202 # if HAVE_RAW_DECL_SQRTL
1203 _GL_WARN_ON_USE (sqrtl, "sqrtl is unportable - "
1204 "use gnulib module mathl for portability");
1212 _GL_FUNCDECL_SYS (tanf, float, (float x));
1214 _GL_CXXALIAS_SYS (tanf, float, (float x));
1215 _GL_CXXALIASWARN (tanf);
1216 #elif defined GNULIB_POSIXCHECK
1218 # if HAVE_RAW_DECL_TANF
1219 _GL_WARN_ON_USE (tanf, "tanf is unportable - "
1220 "use gnulib module tanf for portability");
1225 # if !@HAVE_TANL@ || !@HAVE_DECL_TANL@
1227 _GL_FUNCDECL_SYS (tanl, long double, (long double x));
1229 _GL_CXXALIAS_SYS (tanl, long double, (long double x));
1230 _GL_CXXALIASWARN (tanl);
1231 #elif defined GNULIB_POSIXCHECK
1233 # if HAVE_RAW_DECL_TANL
1234 _GL_WARN_ON_USE (tanl, "tanl is unportable - "
1235 "use gnulib module mathl for portability");
1243 _GL_FUNCDECL_SYS (tanhf, float, (float x));
1245 _GL_CXXALIAS_SYS (tanhf, float, (float x));
1246 _GL_CXXALIASWARN (tanhf);
1247 #elif defined GNULIB_POSIXCHECK
1249 # if HAVE_RAW_DECL_TANHF
1250 _GL_WARN_ON_USE (tanhf, "tanhf is unportable - "
1251 "use gnulib module tanhf for portability");
1257 # if @REPLACE_TRUNCF@
1258 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
1259 # define truncf rpl_truncf
1261 _GL_FUNCDECL_RPL (truncf, float, (float x));
1262 _GL_CXXALIAS_RPL (truncf, float, (float x));
1264 # if !@HAVE_DECL_TRUNCF@
1265 _GL_FUNCDECL_SYS (truncf, float, (float x));
1267 _GL_CXXALIAS_SYS (truncf, float, (float x));
1269 _GL_CXXALIASWARN (truncf);
1270 #elif defined GNULIB_POSIXCHECK
1272 # if HAVE_RAW_DECL_TRUNCF
1273 _GL_WARN_ON_USE (truncf, "truncf is unportable - "
1274 "use gnulib module truncf for portability");
1279 # if @REPLACE_TRUNC@
1280 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
1281 # define trunc rpl_trunc
1283 _GL_FUNCDECL_RPL (trunc, double, (double x));
1284 _GL_CXXALIAS_RPL (trunc, double, (double x));
1286 # if !@HAVE_DECL_TRUNC@
1287 _GL_FUNCDECL_SYS (trunc, double, (double x));
1289 _GL_CXXALIAS_SYS (trunc, double, (double x));
1291 _GL_CXXALIASWARN (trunc);
1292 #elif defined GNULIB_POSIXCHECK
1294 # if HAVE_RAW_DECL_TRUNC
1295 _GL_WARN_ON_USE (trunc, "trunc is unportable - "
1296 "use gnulib module trunc for portability");
1301 # if @REPLACE_TRUNCL@
1302 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
1304 # define truncl rpl_truncl
1306 _GL_FUNCDECL_RPL (truncl, long double, (long double x));
1307 _GL_CXXALIAS_RPL (truncl, long double, (long double x));
1309 # if !@HAVE_DECL_TRUNCL@
1310 _GL_FUNCDECL_SYS (truncl, long double, (long double x));
1312 _GL_CXXALIAS_SYS (truncl, long double, (long double x));
1314 _GL_CXXALIASWARN (truncl);
1315 #elif defined GNULIB_POSIXCHECK
1317 # if HAVE_RAW_DECL_TRUNCL
1318 _GL_WARN_ON_USE (truncl, "truncl is unportable - "
1319 "use gnulib module truncl for portability");
1324 /* Definitions of function-like macros come here, after the function
1328 #if @GNULIB_ISFINITE@
1329 # if @REPLACE_ISFINITE@
1330 _GL_EXTERN_C int gl_isfinitef (float x);
1331 _GL_EXTERN_C int gl_isfinited (double x);
1332 _GL_EXTERN_C int gl_isfinitel (long double x);
1334 # define isfinite(x) \
1335 (sizeof (x) == sizeof (long double) ? gl_isfinitel (x) : \
1336 sizeof (x) == sizeof (double) ? gl_isfinited (x) : \
1341 _GL_MATH_CXX_REAL_FLOATING_DECL_1 (isfinite)
1343 _GL_MATH_CXX_REAL_FLOATING_DECL_2 (isfinite)
1346 #elif defined GNULIB_POSIXCHECK
1347 # if defined isfinite
1348 _GL_WARN_REAL_FLOATING_DECL (isfinite);
1350 # define isfinite(x) _GL_WARN_REAL_FLOATING_IMPL (isfinite, x)
1356 # if @REPLACE_ISINF@
1357 _GL_EXTERN_C int gl_isinff (float x);
1358 _GL_EXTERN_C int gl_isinfd (double x);
1359 _GL_EXTERN_C int gl_isinfl (long double x);
1362 (sizeof (x) == sizeof (long double) ? gl_isinfl (x) : \
1363 sizeof (x) == sizeof (double) ? gl_isinfd (x) : \
1368 _GL_MATH_CXX_REAL_FLOATING_DECL_1 (isinf)
1370 _GL_MATH_CXX_REAL_FLOATING_DECL_2 (isinf)
1373 #elif defined GNULIB_POSIXCHECK
1375 _GL_WARN_REAL_FLOATING_DECL (isinf);
1377 # define isinf(x) _GL_WARN_REAL_FLOATING_IMPL (isinf, x)
1383 /* Test for NaN for 'float' numbers. */
1385 /* The original <math.h> included above provides a declaration of isnan macro
1386 or (older) isnanf function. */
1388 /* GCC 4.0 and newer provides three built-ins for isnan. */
1390 # define isnanf(x) __builtin_isnanf ((float)(x))
1391 # elif defined isnan
1393 # define isnanf(x) isnan ((float)(x))
1396 /* Test whether X is a NaN. */
1398 # define isnanf rpl_isnanf
1399 _GL_EXTERN_C int isnanf (float x);
1404 /* Test for NaN for 'double' numbers.
1405 This function is a gnulib extension, unlike isnan() which applied only
1406 to 'double' numbers earlier but now is a type-generic macro. */
1408 /* The original <math.h> included above provides a declaration of isnan
1411 /* GCC 4.0 and newer provides three built-ins for isnan. */
1413 # define isnand(x) __builtin_isnan ((double)(x))
1416 # define isnand(x) isnan ((double)(x))
1419 /* Test whether X is a NaN. */
1421 # define isnand rpl_isnand
1422 _GL_EXTERN_C int isnand (double x);
1427 /* Test for NaN for 'long double' numbers. */
1429 /* The original <math.h> included above provides a declaration of isnan
1430 macro or (older) isnanl function. */
1432 /* GCC 4.0 and newer provides three built-ins for isnan. */
1434 # define isnanl(x) __builtin_isnanl ((long double)(x))
1435 # elif defined isnan
1437 # define isnanl(x) isnan ((long double)(x))
1440 /* Test whether X is a NaN. */
1442 # define isnanl rpl_isnanl
1443 _GL_EXTERN_C int isnanl (long double x) _GL_ATTRIBUTE_CONST;
1447 /* This must come *after* the snippets for GNULIB_ISNANF and GNULIB_ISNANL! */
1449 # if @REPLACE_ISNAN@
1450 /* We can't just use the isnanf macro (e.g.) as exposed by
1451 isnanf.h (e.g.) here, because those may end up being macros
1452 that recursively expand back to isnan. So use the gnulib
1453 replacements for them directly. */
1454 # if @HAVE_ISNANF@ && __GNUC__ >= 4
1455 # define gl_isnan_f(x) __builtin_isnanf ((float)(x))
1457 _GL_EXTERN_C int rpl_isnanf (float x);
1458 # define gl_isnan_f(x) rpl_isnanf (x)
1460 # if @HAVE_ISNAND@ && __GNUC__ >= 4
1461 # define gl_isnan_d(x) __builtin_isnan ((double)(x))
1463 _GL_EXTERN_C int rpl_isnand (double x);
1464 # define gl_isnan_d(x) rpl_isnand (x)
1466 # if @HAVE_ISNANL@ && __GNUC__ >= 4
1467 # define gl_isnan_l(x) __builtin_isnanl ((long double)(x))
1469 _GL_EXTERN_C int rpl_isnanl (long double x) _GL_ATTRIBUTE_CONST;
1470 # define gl_isnan_l(x) rpl_isnanl (x)
1474 (sizeof (x) == sizeof (long double) ? gl_isnan_l (x) : \
1475 sizeof (x) == sizeof (double) ? gl_isnan_d (x) : \
1477 # elif __GNUC__ >= 4
1480 (sizeof (x) == sizeof (long double) ? __builtin_isnanl ((long double)(x)) : \
1481 sizeof (x) == sizeof (double) ? __builtin_isnan ((double)(x)) : \
1482 __builtin_isnanf ((float)(x)))
1486 _GL_MATH_CXX_REAL_FLOATING_DECL_1 (isnan)
1488 _GL_MATH_CXX_REAL_FLOATING_DECL_2 (isnan)
1491 /* Ensure isnan is a macro. */
1493 # define isnan isnan
1496 #elif defined GNULIB_POSIXCHECK
1498 _GL_WARN_REAL_FLOATING_DECL (isnan);
1500 # define isnan(x) _GL_WARN_REAL_FLOATING_IMPL (isnan, x)
1505 #if @GNULIB_SIGNBIT@
1506 # if @REPLACE_SIGNBIT_USING_GCC@
1508 /* GCC 4.0 and newer provides three built-ins for signbit. */
1509 # define signbit(x) \
1510 (sizeof (x) == sizeof (long double) ? __builtin_signbitl (x) : \
1511 sizeof (x) == sizeof (double) ? __builtin_signbit (x) : \
1512 __builtin_signbitf (x))
1514 # if @REPLACE_SIGNBIT@
1516 _GL_EXTERN_C int gl_signbitf (float arg);
1517 _GL_EXTERN_C int gl_signbitd (double arg);
1518 _GL_EXTERN_C int gl_signbitl (long double arg);
1519 # if __GNUC__ >= 2 && !defined __STRICT_ANSI__
1520 # define _GL_NUM_UINT_WORDS(type) \
1521 ((sizeof (type) + sizeof (unsigned int) - 1) / sizeof (unsigned int))
1522 # if defined FLT_SIGNBIT_WORD && defined FLT_SIGNBIT_BIT && !defined gl_signbitf
1523 # define gl_signbitf_OPTIMIZED_MACRO
1524 # define gl_signbitf(arg) \
1525 ({ union { float _value; \
1526 unsigned int _word[_GL_NUM_UINT_WORDS (float)]; \
1528 _m._value = (arg); \
1529 (_m._word[FLT_SIGNBIT_WORD] >> FLT_SIGNBIT_BIT) & 1; \
1532 # if defined DBL_SIGNBIT_WORD && defined DBL_SIGNBIT_BIT && !defined gl_signbitd
1533 # define gl_signbitd_OPTIMIZED_MACRO
1534 # define gl_signbitd(arg) \
1535 ({ union { double _value; \
1536 unsigned int _word[_GL_NUM_UINT_WORDS (double)]; \
1538 _m._value = (arg); \
1539 (_m._word[DBL_SIGNBIT_WORD] >> DBL_SIGNBIT_BIT) & 1; \
1542 # if defined LDBL_SIGNBIT_WORD && defined LDBL_SIGNBIT_BIT && !defined gl_signbitl
1543 # define gl_signbitl_OPTIMIZED_MACRO
1544 # define gl_signbitl(arg) \
1545 ({ union { long double _value; \
1546 unsigned int _word[_GL_NUM_UINT_WORDS (long double)]; \
1548 _m._value = (arg); \
1549 (_m._word[LDBL_SIGNBIT_WORD] >> LDBL_SIGNBIT_BIT) & 1; \
1553 # define signbit(x) \
1554 (sizeof (x) == sizeof (long double) ? gl_signbitl (x) : \
1555 sizeof (x) == sizeof (double) ? gl_signbitd (x) : \
1560 _GL_MATH_CXX_REAL_FLOATING_DECL_1 (signbit)
1562 _GL_MATH_CXX_REAL_FLOATING_DECL_2 (signbit)
1565 #elif defined GNULIB_POSIXCHECK
1566 # if defined signbit
1567 _GL_WARN_REAL_FLOATING_DECL (signbit);
1569 # define signbit(x) _GL_WARN_REAL_FLOATING_IMPL (signbit, x)
1574 #endif /* _@GUARD_PREFIX@_MATH_H */
1575 #endif /* _@GUARD_PREFIX@_MATH_H */