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_VALF (1.0f / 0.0f)
147 # define HUGE_VAL (1.0 / 0.0)
149 # define HUGE_VALL (1.0L / 0.0L)
152 /* HUGE_VALF is a 'float' Infinity. */
154 # if defined _MSC_VER
155 /* The Microsoft MSVC 9 compiler chokes on the expression 1.0f / 0.0f. */
156 # define HUGE_VALF (1e25f * 1e25f)
158 # define HUGE_VALF (1.0f / 0.0f)
162 /* HUGE_VAL is a 'double' Infinity. */
164 # if defined _MSC_VER
165 /* The Microsoft MSVC 9 compiler chokes on the expression 1.0 / 0.0. */
166 # define HUGE_VAL (1e250 * 1e250)
168 # define HUGE_VAL (1.0 / 0.0)
172 /* HUGE_VALL is a 'long double' Infinity. */
174 # if defined _MSC_VER
175 /* The Microsoft MSVC 9 compiler chokes on the expression 1.0L / 0.0L. */
176 # define HUGE_VALL (1e250L * 1e250L)
178 # define HUGE_VALL (1.0L / 0.0L)
185 _GL_FUNCDECL_SYS (acosf, float, (float x));
187 _GL_CXXALIAS_SYS (acosf, float, (float x));
188 _GL_CXXALIASWARN (acosf);
189 #elif defined GNULIB_POSIXCHECK
191 # if HAVE_RAW_DECL_ACOSF
192 _GL_WARN_ON_USE (acosf, "acosf is unportable - "
193 "use gnulib module acosf for portability");
198 # if !@HAVE_ACOSL@ || !@HAVE_DECL_ACOSL@
200 _GL_FUNCDECL_SYS (acosl, long double, (long double x));
202 _GL_CXXALIAS_SYS (acosl, long double, (long double x));
203 _GL_CXXALIASWARN (acosl);
204 #elif defined GNULIB_POSIXCHECK
206 # if HAVE_RAW_DECL_ACOSL
207 _GL_WARN_ON_USE (acosl, "acosl is unportable - "
208 "use gnulib module mathl for portability");
216 _GL_FUNCDECL_SYS (asinf, float, (float x));
218 _GL_CXXALIAS_SYS (asinf, float, (float x));
219 _GL_CXXALIASWARN (asinf);
220 #elif defined GNULIB_POSIXCHECK
222 # if HAVE_RAW_DECL_ASINF
223 _GL_WARN_ON_USE (asinf, "asinf is unportable - "
224 "use gnulib module asinf for portability");
229 # if !@HAVE_ASINL@ || !@HAVE_DECL_ASINL@
231 _GL_FUNCDECL_SYS (asinl, long double, (long double x));
233 _GL_CXXALIAS_SYS (asinl, long double, (long double x));
234 _GL_CXXALIASWARN (asinl);
235 #elif defined GNULIB_POSIXCHECK
237 # if HAVE_RAW_DECL_ASINL
238 _GL_WARN_ON_USE (asinl, "asinl is unportable - "
239 "use gnulib module mathl for portability");
247 _GL_FUNCDECL_SYS (atanf, float, (float x));
249 _GL_CXXALIAS_SYS (atanf, float, (float x));
250 _GL_CXXALIASWARN (atanf);
251 #elif defined GNULIB_POSIXCHECK
253 # if HAVE_RAW_DECL_ATANF
254 _GL_WARN_ON_USE (atanf, "atanf is unportable - "
255 "use gnulib module atanf for portability");
260 # if !@HAVE_ATANL@ || !@HAVE_DECL_ATANL@
262 _GL_FUNCDECL_SYS (atanl, long double, (long double x));
264 _GL_CXXALIAS_SYS (atanl, long double, (long double x));
265 _GL_CXXALIASWARN (atanl);
266 #elif defined GNULIB_POSIXCHECK
268 # if HAVE_RAW_DECL_ATANL
269 _GL_WARN_ON_USE (atanl, "atanl is unportable - "
270 "use gnulib module mathl for portability");
278 _GL_FUNCDECL_SYS (atan2f, float, (float y, float x));
280 _GL_CXXALIAS_SYS (atan2f, float, (float y, float x));
281 _GL_CXXALIASWARN (atan2f);
282 #elif defined GNULIB_POSIXCHECK
284 # if HAVE_RAW_DECL_ATAN2F
285 _GL_WARN_ON_USE (atan2f, "atan2f is unportable - "
286 "use gnulib module atan2f for portability");
293 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
295 # define ceilf rpl_ceilf
297 _GL_FUNCDECL_RPL (ceilf, float, (float x));
298 _GL_CXXALIAS_RPL (ceilf, float, (float x));
300 # if !@HAVE_DECL_CEILF@
302 _GL_FUNCDECL_SYS (ceilf, float, (float x));
304 _GL_CXXALIAS_SYS (ceilf, float, (float x));
306 _GL_CXXALIASWARN (ceilf);
307 #elif defined GNULIB_POSIXCHECK
309 # if HAVE_RAW_DECL_CEILF
310 _GL_WARN_ON_USE (ceilf, "ceilf is unportable - "
311 "use gnulib module ceilf for portability");
317 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
318 # define ceil rpl_ceil
320 _GL_FUNCDECL_RPL (ceil, double, (double x));
321 _GL_CXXALIAS_RPL (ceil, double, (double x));
323 _GL_CXXALIAS_SYS (ceil, double, (double x));
325 _GL_CXXALIASWARN (ceil);
330 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
332 # define ceill rpl_ceill
334 _GL_FUNCDECL_RPL (ceill, long double, (long double x));
335 _GL_CXXALIAS_RPL (ceill, long double, (long double x));
337 # if !@HAVE_DECL_CEILL@
339 _GL_FUNCDECL_SYS (ceill, long double, (long double x));
341 _GL_CXXALIAS_SYS (ceill, long double, (long double x));
343 _GL_CXXALIASWARN (ceill);
344 #elif defined GNULIB_POSIXCHECK
346 # if HAVE_RAW_DECL_CEILL
347 _GL_WARN_ON_USE (ceill, "ceill is unportable - "
348 "use gnulib module ceill for portability");
353 #if @GNULIB_COPYSIGNF@
354 # if !@HAVE_COPYSIGNF@
355 _GL_FUNCDECL_SYS (copysignf, float, (float x, float y));
357 _GL_CXXALIAS_SYS (copysignf, float, (float x, float y));
358 _GL_CXXALIASWARN (copysignf);
359 #elif defined GNULIB_POSIXCHECK
361 # if HAVE_RAW_DECL_COPYSIGNF
362 _GL_WARN_ON_USE (copysignf, "copysignf is unportable - "
363 "use gnulib module copysignf for portability");
367 #if @GNULIB_COPYSIGN@
368 # if !@HAVE_COPYSIGN@
369 _GL_FUNCDECL_SYS (copysign, double, (double x, double y));
371 _GL_CXXALIAS_SYS (copysign, double, (double x, double y));
372 _GL_CXXALIASWARN (copysign);
373 #elif defined GNULIB_POSIXCHECK
375 # if HAVE_RAW_DECL_COPYSIGN
376 _GL_WARN_ON_USE (copysign, "copysign is unportable - "
377 "use gnulib module copysign for portability");
381 #if @GNULIB_COPYSIGNL@
382 # if !@HAVE_COPYSIGNL@
383 _GL_FUNCDECL_SYS (copysignl, long double, (long double x, long double y));
385 _GL_CXXALIAS_SYS (copysignl, long double, (long double x, long double y));
386 _GL_CXXALIASWARN (copysignl);
387 #elif defined GNULIB_POSIXCHECK
389 # if HAVE_RAW_DECL_COPYSIGNL
390 _GL_WARN_ON_USE (copysign, "copysignl is unportable - "
391 "use gnulib module copysignl for portability");
399 _GL_FUNCDECL_SYS (cosf, float, (float x));
401 _GL_CXXALIAS_SYS (cosf, float, (float x));
402 _GL_CXXALIASWARN (cosf);
403 #elif defined GNULIB_POSIXCHECK
405 # if HAVE_RAW_DECL_COSF
406 _GL_WARN_ON_USE (cosf, "cosf is unportable - "
407 "use gnulib module cosf for portability");
412 # if !@HAVE_COSL@ || !@HAVE_DECL_COSL@
414 _GL_FUNCDECL_SYS (cosl, long double, (long double x));
416 _GL_CXXALIAS_SYS (cosl, long double, (long double x));
417 _GL_CXXALIASWARN (cosl);
418 #elif defined GNULIB_POSIXCHECK
420 # if HAVE_RAW_DECL_COSL
421 _GL_WARN_ON_USE (cosl, "cosl is unportable - "
422 "use gnulib module mathl for portability");
430 _GL_FUNCDECL_SYS (coshf, float, (float x));
432 _GL_CXXALIAS_SYS (coshf, float, (float x));
433 _GL_CXXALIASWARN (coshf);
434 #elif defined GNULIB_POSIXCHECK
436 # if HAVE_RAW_DECL_COSHF
437 _GL_WARN_ON_USE (coshf, "coshf is unportable - "
438 "use gnulib module coshf for portability");
446 _GL_FUNCDECL_SYS (expf, float, (float x));
448 _GL_CXXALIAS_SYS (expf, float, (float x));
449 _GL_CXXALIASWARN (expf);
450 #elif defined GNULIB_POSIXCHECK
452 # if HAVE_RAW_DECL_EXPF
453 _GL_WARN_ON_USE (expf, "expf is unportable - "
454 "use gnulib module expf for portability");
459 # if !@HAVE_EXPL@ || !@HAVE_DECL_EXPL@
461 _GL_FUNCDECL_SYS (expl, long double, (long double x));
463 _GL_CXXALIAS_SYS (expl, long double, (long double x));
464 _GL_CXXALIASWARN (expl);
465 #elif defined GNULIB_POSIXCHECK
467 # if HAVE_RAW_DECL_EXPL
468 _GL_WARN_ON_USE (expl, "expl is unportable - "
469 "use gnulib module mathl for portability");
477 _GL_FUNCDECL_SYS (fabsf, float, (float x));
479 _GL_CXXALIAS_SYS (fabsf, float, (float x));
480 _GL_CXXALIASWARN (fabsf);
481 #elif defined GNULIB_POSIXCHECK
483 # if HAVE_RAW_DECL_FABSF
484 _GL_WARN_ON_USE (fabsf, "fabsf is unportable - "
485 "use gnulib module fabsf for portability");
491 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
493 # define fabsl rpl_fabsl
495 _GL_FUNCDECL_RPL (fabsl, long double, (long double x));
496 _GL_CXXALIAS_RPL (fabsl, long double, (long double x));
500 _GL_FUNCDECL_SYS (fabsl, long double, (long double x));
502 _GL_CXXALIAS_SYS (fabsl, long double, (long double x));
504 _GL_CXXALIASWARN (fabsl);
505 #elif defined GNULIB_POSIXCHECK
507 # if HAVE_RAW_DECL_FABSL
508 _GL_WARN_ON_USE (fabsl, "fabsl is unportable - "
509 "use gnulib module fabsl for portability");
515 # if @REPLACE_FLOORF@
516 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
518 # define floorf rpl_floorf
520 _GL_FUNCDECL_RPL (floorf, float, (float x));
521 _GL_CXXALIAS_RPL (floorf, float, (float x));
523 # if !@HAVE_DECL_FLOORF@
525 _GL_FUNCDECL_SYS (floorf, float, (float x));
527 _GL_CXXALIAS_SYS (floorf, float, (float x));
529 _GL_CXXALIASWARN (floorf);
530 #elif defined GNULIB_POSIXCHECK
532 # if HAVE_RAW_DECL_FLOORF
533 _GL_WARN_ON_USE (floorf, "floorf is unportable - "
534 "use gnulib module floorf for portability");
540 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
541 # define floor rpl_floor
543 _GL_FUNCDECL_RPL (floor, double, (double x));
544 _GL_CXXALIAS_RPL (floor, double, (double x));
546 _GL_CXXALIAS_SYS (floor, double, (double x));
548 _GL_CXXALIASWARN (floor);
552 # if @REPLACE_FLOORL@
553 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
555 # define floorl rpl_floorl
557 _GL_FUNCDECL_RPL (floorl, long double, (long double x));
558 _GL_CXXALIAS_RPL (floorl, long double, (long double x));
560 # if !@HAVE_DECL_FLOORL@
562 _GL_FUNCDECL_SYS (floorl, long double, (long double x));
564 _GL_CXXALIAS_SYS (floorl, long double, (long double x));
566 _GL_CXXALIASWARN (floorl);
567 #elif defined GNULIB_POSIXCHECK
569 # if HAVE_RAW_DECL_FLOORL
570 _GL_WARN_ON_USE (floorl, "floorl is unportable - "
571 "use gnulib module floorl for portability");
578 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
580 # define fmaf rpl_fmaf
582 _GL_FUNCDECL_RPL (fmaf, float, (float x, float y, float z));
583 _GL_CXXALIAS_RPL (fmaf, float, (float x, float y, float z));
586 _GL_FUNCDECL_SYS (fmaf, float, (float x, float y, float z));
588 _GL_CXXALIAS_SYS (fmaf, float, (float x, float y, float z));
590 _GL_CXXALIASWARN (fmaf);
591 #elif defined GNULIB_POSIXCHECK
593 # if HAVE_RAW_DECL_FMAF
594 _GL_WARN_ON_USE (fmaf, "fmaf is unportable - "
595 "use gnulib module fmaf for portability");
601 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
605 _GL_FUNCDECL_RPL (fma, double, (double x, double y, double z));
606 _GL_CXXALIAS_RPL (fma, double, (double x, double y, double z));
609 _GL_FUNCDECL_SYS (fma, double, (double x, double y, double z));
611 _GL_CXXALIAS_SYS (fma, double, (double x, double y, double z));
613 _GL_CXXALIASWARN (fma);
614 #elif defined GNULIB_POSIXCHECK
616 # if HAVE_RAW_DECL_FMA
617 _GL_WARN_ON_USE (fma, "fma is unportable - "
618 "use gnulib module fma for portability");
624 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
626 # define fmal rpl_fmal
628 _GL_FUNCDECL_RPL (fmal, long double,
629 (long double x, long double y, long double z));
630 _GL_CXXALIAS_RPL (fmal, long double,
631 (long double x, long double y, long double z));
634 _GL_FUNCDECL_SYS (fmal, long double,
635 (long double x, long double y, long double z));
637 _GL_CXXALIAS_SYS (fmal, long double,
638 (long double x, long double y, long double z));
640 _GL_CXXALIASWARN (fmal);
641 #elif defined GNULIB_POSIXCHECK
643 # if HAVE_RAW_DECL_FMAL
644 _GL_WARN_ON_USE (fmal, "fmal is unportable - "
645 "use gnulib module fmal for portability");
652 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
654 # define fmodf rpl_fmodf
656 _GL_FUNCDECL_RPL (fmodf, float, (float x, float y));
657 _GL_CXXALIAS_RPL (fmodf, float, (float x, float y));
661 _GL_FUNCDECL_SYS (fmodf, float, (float x, float y));
663 _GL_CXXALIAS_SYS (fmodf, float, (float x, float y));
665 _GL_CXXALIASWARN (fmodf);
666 #elif defined GNULIB_POSIXCHECK
668 # if HAVE_RAW_DECL_FMODF
669 _GL_WARN_ON_USE (fmodf, "fmodf is unportable - "
670 "use gnulib module fmodf for portability");
676 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
678 # define fmod rpl_fmod
680 _GL_FUNCDECL_RPL (fmod, double, (double x, double y));
681 _GL_CXXALIAS_RPL (fmod, double, (double x, double y));
683 _GL_CXXALIAS_SYS (fmod, double, (double x, double y));
685 _GL_CXXALIASWARN (fmod);
686 #elif defined GNULIB_POSIXCHECK
688 # if HAVE_RAW_DECL_FMOD
689 _GL_WARN_ON_USE (fmod, "fmod has portability problems - "
690 "use gnulib module fmod for portability");
696 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
698 # define fmodl rpl_fmodl
700 _GL_FUNCDECL_RPL (fmodl, long double, (long double x, long double y));
701 _GL_CXXALIAS_RPL (fmodl, long double, (long double x, long double y));
705 _GL_FUNCDECL_SYS (fmodl, long double, (long double x, long double y));
707 _GL_CXXALIAS_SYS (fmodl, long double, (long double x, long double y));
709 _GL_CXXALIASWARN (fmodl);
710 #elif defined GNULIB_POSIXCHECK
712 # if HAVE_RAW_DECL_FMODL
713 _GL_WARN_ON_USE (fmodl, "fmodl is unportable - "
714 "use gnulib module fmodl for portability");
722 If x finite and nonzero: 0.5 <= |mantissa| < 1.0.
723 If x is zero: mantissa = x, exp = 0.
724 If x is infinite or NaN: mantissa = x, exp unspecified.
725 Store exp in *EXPPTR and return mantissa. */
727 # if @REPLACE_FREXPF@
728 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
730 # define frexpf rpl_frexpf
732 _GL_FUNCDECL_RPL (frexpf, float, (float x, int *expptr) _GL_ARG_NONNULL ((2)));
733 _GL_CXXALIAS_RPL (frexpf, float, (float x, int *expptr));
737 _GL_FUNCDECL_SYS (frexpf, float, (float x, int *expptr) _GL_ARG_NONNULL ((2)));
739 _GL_CXXALIAS_SYS (frexpf, float, (float x, int *expptr));
741 _GL_CXXALIASWARN (frexpf);
742 #elif defined GNULIB_POSIXCHECK
744 # if HAVE_RAW_DECL_FREXPF
745 _GL_WARN_ON_USE (frexpf, "frexpf is unportable - "
746 "use gnulib module frexpf for portability");
753 If x finite and nonzero: 0.5 <= |mantissa| < 1.0.
754 If x is zero: mantissa = x, exp = 0.
755 If x is infinite or NaN: mantissa = x, exp unspecified.
756 Store exp in *EXPPTR and return mantissa. */
759 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
760 # define frexp rpl_frexp
762 _GL_FUNCDECL_RPL (frexp, double, (double x, int *expptr) _GL_ARG_NONNULL ((2)));
763 _GL_CXXALIAS_RPL (frexp, double, (double x, int *expptr));
765 _GL_CXXALIAS_SYS (frexp, double, (double x, int *expptr));
767 _GL_CXXALIASWARN (frexp);
768 #elif defined GNULIB_POSIXCHECK
770 /* Assume frexp is always declared. */
771 _GL_WARN_ON_USE (frexp, "frexp is unportable - "
772 "use gnulib module frexp for portability");
778 If x finite and nonzero: 0.5 <= |mantissa| < 1.0.
779 If x is zero: mantissa = x, exp = 0.
780 If x is infinite or NaN: mantissa = x, exp unspecified.
781 Store exp in *EXPPTR and return mantissa. */
782 #if @GNULIB_FREXPL@ && @REPLACE_FREXPL@
783 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
785 # define frexpl rpl_frexpl
787 _GL_FUNCDECL_RPL (frexpl, long double,
788 (long double x, int *expptr) _GL_ARG_NONNULL ((2)));
789 _GL_CXXALIAS_RPL (frexpl, long double, (long double x, int *expptr));
791 # if !@HAVE_DECL_FREXPL@
792 _GL_FUNCDECL_SYS (frexpl, long double,
793 (long double x, int *expptr) _GL_ARG_NONNULL ((2)));
796 _GL_CXXALIAS_SYS (frexpl, long double, (long double x, int *expptr));
799 #if @GNULIB_FREXPL@ && !(@REPLACE_FREXPL@ && !@HAVE_DECL_FREXPL@)
800 _GL_CXXALIASWARN (frexpl);
802 #if !@GNULIB_FREXPL@ && defined GNULIB_POSIXCHECK
804 # if HAVE_RAW_DECL_FREXPL
805 _GL_WARN_ON_USE (frexpl, "frexpl is unportable - "
806 "use gnulib module frexpl for portability");
811 /* Return x * 2^exp. */
815 _GL_FUNCDECL_SYS (ldexpf, float, (float x, int exp));
817 _GL_CXXALIAS_SYS (ldexpf, float, (float x, int exp));
818 _GL_CXXALIASWARN (ldexpf);
819 #elif defined GNULIB_POSIXCHECK
821 # if HAVE_RAW_DECL_LDEXPF
822 _GL_WARN_ON_USE (ldexpf, "ldexpf is unportable - "
823 "use gnulib module ldexpf for portability");
827 /* Return x * 2^exp. */
828 #if @GNULIB_LDEXPL@ && @REPLACE_LDEXPL@
829 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
831 # define ldexpl rpl_ldexpl
833 _GL_FUNCDECL_RPL (ldexpl, long double, (long double x, int exp));
834 _GL_CXXALIAS_RPL (ldexpl, long double, (long double x, int exp));
836 # if !@HAVE_DECL_LDEXPL@
837 _GL_FUNCDECL_SYS (ldexpl, long double, (long double x, int exp));
840 _GL_CXXALIAS_SYS (ldexpl, long double, (long double x, int exp));
844 _GL_CXXALIASWARN (ldexpl);
846 #if !@GNULIB_LDEXPL@ && defined GNULIB_POSIXCHECK
848 # if HAVE_RAW_DECL_LDEXPL
849 _GL_WARN_ON_USE (ldexpl, "ldexpl is unportable - "
850 "use gnulib module ldexpl for portability");
856 # if !@HAVE_DECL_LOGB@
857 _GL_EXTERN_C double logb (double x);
859 #elif defined GNULIB_POSIXCHECK
861 # if HAVE_RAW_DECL_LOGB
862 _GL_WARN_ON_USE (logb, "logb is unportable - "
863 "use gnulib module logb for portability");
871 _GL_FUNCDECL_SYS (logf, float, (float x));
873 _GL_CXXALIAS_SYS (logf, float, (float x));
874 _GL_CXXALIASWARN (logf);
875 #elif defined GNULIB_POSIXCHECK
877 # if HAVE_RAW_DECL_LOGF
878 _GL_WARN_ON_USE (logf, "logf is unportable - "
879 "use gnulib module logf for portability");
884 # if !@HAVE_LOGL@ || !@HAVE_DECL_LOGL@
886 _GL_FUNCDECL_SYS (logl, long double, (long double x));
888 _GL_CXXALIAS_SYS (logl, long double, (long double x));
889 _GL_CXXALIASWARN (logl);
890 #elif defined GNULIB_POSIXCHECK
892 # if HAVE_RAW_DECL_LOGL
893 _GL_WARN_ON_USE (logl, "logl is unportable - "
894 "use gnulib module mathl for portability");
902 _GL_FUNCDECL_SYS (log10f, float, (float x));
904 _GL_CXXALIAS_SYS (log10f, float, (float x));
905 _GL_CXXALIASWARN (log10f);
906 #elif defined GNULIB_POSIXCHECK
908 # if HAVE_RAW_DECL_LOG10F
909 _GL_WARN_ON_USE (log10f, "log10f is unportable - "
910 "use gnulib module log10f for portability");
915 # if !@HAVE_LOG10L@ || !@HAVE_DECL_LOG10L@
917 _GL_FUNCDECL_SYS (log10l, long double, (long double x));
919 _GL_CXXALIAS_SYS (log10l, long double, (long double x));
920 _GL_CXXALIASWARN (log10l);
921 #elif defined GNULIB_POSIXCHECK
923 # if HAVE_RAW_DECL_LOG10L
924 _GL_WARN_ON_USE (log10l, "log10l is unportable - "
925 "use gnulib module log10l for portability");
932 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
934 # define modff rpl_modff
936 _GL_FUNCDECL_RPL (modff, float, (float x, float *iptr) _GL_ARG_NONNULL ((2)));
937 _GL_CXXALIAS_RPL (modff, float, (float x, float *iptr));
941 _GL_FUNCDECL_SYS (modff, float, (float x, float *iptr) _GL_ARG_NONNULL ((2)));
943 _GL_CXXALIAS_SYS (modff, float, (float x, float *iptr));
945 _GL_CXXALIASWARN (modff);
946 #elif defined GNULIB_POSIXCHECK
948 # if HAVE_RAW_DECL_MODFF
949 _GL_WARN_ON_USE (modff, "modff is unportable - "
950 "use gnulib module modff for portability");
956 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
958 # define modf rpl_modf
960 _GL_FUNCDECL_RPL (modf, double, (double x, double *iptr) _GL_ARG_NONNULL ((2)));
961 _GL_CXXALIAS_RPL (modf, double, (double x, double *iptr));
963 _GL_CXXALIAS_SYS (modf, double, (double x, double *iptr));
965 _GL_CXXALIASWARN (modf);
966 #elif defined GNULIB_POSIXCHECK
968 # if HAVE_RAW_DECL_MODF
969 _GL_WARN_ON_USE (modf, "modf has portability problems - "
970 "use gnulib module modf for portability");
976 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
978 # define modfl rpl_modfl
980 _GL_FUNCDECL_RPL (modfl, long double, (long double x, long double *iptr)
981 _GL_ARG_NONNULL ((2)));
982 _GL_CXXALIAS_RPL (modfl, long double, (long double x, long double *iptr));
986 _GL_FUNCDECL_SYS (modfl, long double, (long double x, long double *iptr)
987 _GL_ARG_NONNULL ((2)));
989 _GL_CXXALIAS_SYS (modfl, long double, (long double x, long double *iptr));
991 _GL_CXXALIASWARN (modfl);
992 #elif defined GNULIB_POSIXCHECK
994 # if HAVE_RAW_DECL_MODFL
995 _GL_WARN_ON_USE (modfl, "modfl is unportable - "
996 "use gnulib module modfl for portability");
1004 _GL_FUNCDECL_SYS (powf, float, (float x, float y));
1006 _GL_CXXALIAS_SYS (powf, float, (float x, float y));
1007 _GL_CXXALIASWARN (powf);
1008 #elif defined GNULIB_POSIXCHECK
1010 # if HAVE_RAW_DECL_POWF
1011 _GL_WARN_ON_USE (powf, "powf is unportable - "
1012 "use gnulib module powf for portability");
1017 #if @GNULIB_REMAINDERF@
1018 # if @REPLACE_REMAINDERF@
1019 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
1021 # define remainderf rpl_remainderf
1023 _GL_FUNCDECL_RPL (remainderf, float, (float x, float y));
1024 _GL_CXXALIAS_RPL (remainderf, float, (float x, float y));
1026 # if !@HAVE_REMAINDERF@
1027 _GL_FUNCDECL_SYS (remainderf, float, (float x, float y));
1029 _GL_CXXALIAS_SYS (remainderf, float, (float x, float y));
1031 _GL_CXXALIASWARN (remainderf);
1032 #elif defined GNULIB_POSIXCHECK
1034 # if HAVE_RAW_DECL_REMAINDERF
1035 _GL_WARN_ON_USE (remainderf, "remainderf is unportable - "
1036 "use gnulib module remainderf for portability");
1040 #if @GNULIB_REMAINDER@
1041 # if @REPLACE_REMAINDER@
1042 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
1044 # define remainder rpl_remainder
1046 _GL_FUNCDECL_RPL (remainder, double, (double x, double y));
1047 _GL_CXXALIAS_RPL (remainder, double, (double x, double y));
1049 # if !@HAVE_REMAINDER@ || !@HAVE_DECL_REMAINDER@
1050 _GL_FUNCDECL_SYS (remainder, double, (double x, double y));
1052 _GL_CXXALIAS_SYS (remainder, double, (double x, double y));
1054 _GL_CXXALIASWARN (remainder);
1055 #elif defined GNULIB_POSIXCHECK
1057 # if HAVE_RAW_DECL_REMAINDER
1058 _GL_WARN_ON_USE (remainder, "remainder is unportable - "
1059 "use gnulib module remainder for portability");
1063 #if @GNULIB_REMAINDERL@
1064 # if @REPLACE_REMAINDERL@
1065 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
1067 # define remainderl rpl_remainderl
1069 _GL_FUNCDECL_RPL (remainderl, long double, (long double x, long double y));
1070 _GL_CXXALIAS_RPL (remainderl, long double, (long double x, long double y));
1072 # if !@HAVE_REMAINDERL@
1073 _GL_FUNCDECL_SYS (remainderl, long double, (long double x, long double y));
1075 _GL_CXXALIAS_SYS (remainderl, long double, (long double x, long double y));
1077 _GL_CXXALIASWARN (remainderl);
1078 #elif defined GNULIB_POSIXCHECK
1080 # if HAVE_RAW_DECL_REMAINDERL
1081 _GL_WARN_ON_USE (remainderl, "remainderl is unportable - "
1082 "use gnulib module remainderl for portability");
1089 _GL_FUNCDECL_SYS (rintf, float, (float x));
1091 _GL_CXXALIAS_SYS (rintf, float, (float x));
1092 _GL_CXXALIASWARN (rintf);
1093 #elif defined GNULIB_POSIXCHECK
1095 # if HAVE_RAW_DECL_RINTF
1096 _GL_WARN_ON_USE (rintf, "rintf is unportable - "
1097 "use gnulib module rintf for portability");
1103 _GL_FUNCDECL_SYS (rint, double, (double x));
1105 _GL_CXXALIAS_SYS (rint, double, (double x));
1106 _GL_CXXALIASWARN (rint);
1107 #elif defined GNULIB_POSIXCHECK
1109 # if HAVE_RAW_DECL_RINT
1110 _GL_WARN_ON_USE (rint, "rint is unportable - "
1111 "use gnulib module rint for portability");
1117 _GL_FUNCDECL_SYS (rintl, long double, (long double x));
1119 _GL_CXXALIAS_SYS (rintl, long double, (long double x));
1120 _GL_CXXALIASWARN (rintl);
1121 #elif defined GNULIB_POSIXCHECK
1123 # if HAVE_RAW_DECL_RINTL
1124 _GL_WARN_ON_USE (rintl, "rintl is unportable - "
1125 "use gnulib module rintl for portability");
1131 # if @REPLACE_ROUNDF@
1132 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
1134 # define roundf rpl_roundf
1136 _GL_FUNCDECL_RPL (roundf, float, (float x));
1137 _GL_CXXALIAS_RPL (roundf, float, (float x));
1139 # if !@HAVE_DECL_ROUNDF@
1140 _GL_FUNCDECL_SYS (roundf, float, (float x));
1142 _GL_CXXALIAS_SYS (roundf, float, (float x));
1144 _GL_CXXALIASWARN (roundf);
1145 #elif defined GNULIB_POSIXCHECK
1147 # if HAVE_RAW_DECL_ROUNDF
1148 _GL_WARN_ON_USE (roundf, "roundf is unportable - "
1149 "use gnulib module roundf for portability");
1154 # if @REPLACE_ROUND@
1155 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
1157 # define round rpl_round
1159 _GL_FUNCDECL_RPL (round, double, (double x));
1160 _GL_CXXALIAS_RPL (round, double, (double x));
1162 # if !@HAVE_DECL_ROUND@
1163 _GL_FUNCDECL_SYS (round, double, (double x));
1165 _GL_CXXALIAS_SYS (round, double, (double x));
1167 _GL_CXXALIASWARN (round);
1168 #elif defined GNULIB_POSIXCHECK
1170 # if HAVE_RAW_DECL_ROUND
1171 _GL_WARN_ON_USE (round, "round is unportable - "
1172 "use gnulib module round for portability");
1177 # if @REPLACE_ROUNDL@
1178 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
1180 # define roundl rpl_roundl
1182 _GL_FUNCDECL_RPL (roundl, long double, (long double x));
1183 _GL_CXXALIAS_RPL (roundl, long double, (long double x));
1185 # if !@HAVE_DECL_ROUNDL@
1186 _GL_FUNCDECL_SYS (roundl, long double, (long double x));
1188 _GL_CXXALIAS_SYS (roundl, long double, (long double x));
1190 _GL_CXXALIASWARN (roundl);
1191 #elif defined GNULIB_POSIXCHECK
1193 # if HAVE_RAW_DECL_ROUNDL
1194 _GL_WARN_ON_USE (roundl, "roundl is unportable - "
1195 "use gnulib module roundl for portability");
1203 _GL_FUNCDECL_SYS (sinf, float, (float x));
1205 _GL_CXXALIAS_SYS (sinf, float, (float x));
1206 _GL_CXXALIASWARN (sinf);
1207 #elif defined GNULIB_POSIXCHECK
1209 # if HAVE_RAW_DECL_SINF
1210 _GL_WARN_ON_USE (sinf, "sinf is unportable - "
1211 "use gnulib module sinf for portability");
1216 # if !@HAVE_SINL@ || !@HAVE_DECL_SINL@
1218 _GL_FUNCDECL_SYS (sinl, long double, (long double x));
1220 _GL_CXXALIAS_SYS (sinl, long double, (long double x));
1221 _GL_CXXALIASWARN (sinl);
1222 #elif defined GNULIB_POSIXCHECK
1224 # if HAVE_RAW_DECL_SINL
1225 _GL_WARN_ON_USE (sinl, "sinl is unportable - "
1226 "use gnulib module mathl for portability");
1234 _GL_FUNCDECL_SYS (sinhf, float, (float x));
1236 _GL_CXXALIAS_SYS (sinhf, float, (float x));
1237 _GL_CXXALIASWARN (sinhf);
1238 #elif defined GNULIB_POSIXCHECK
1240 # if HAVE_RAW_DECL_SINHF
1241 _GL_WARN_ON_USE (sinhf, "sinhf is unportable - "
1242 "use gnulib module sinhf for portability");
1250 _GL_FUNCDECL_SYS (sqrtf, float, (float x));
1252 _GL_CXXALIAS_SYS (sqrtf, float, (float x));
1253 _GL_CXXALIASWARN (sqrtf);
1254 #elif defined GNULIB_POSIXCHECK
1256 # if HAVE_RAW_DECL_SQRTF
1257 _GL_WARN_ON_USE (sqrtf, "sqrtf is unportable - "
1258 "use gnulib module sqrtf for portability");
1263 # if !@HAVE_SQRTL@ || !@HAVE_DECL_SQRTL@
1265 _GL_FUNCDECL_SYS (sqrtl, long double, (long double x));
1267 _GL_CXXALIAS_SYS (sqrtl, long double, (long double x));
1268 _GL_CXXALIASWARN (sqrtl);
1269 #elif defined GNULIB_POSIXCHECK
1271 # if HAVE_RAW_DECL_SQRTL
1272 _GL_WARN_ON_USE (sqrtl, "sqrtl is unportable - "
1273 "use gnulib module mathl for portability");
1281 _GL_FUNCDECL_SYS (tanf, float, (float x));
1283 _GL_CXXALIAS_SYS (tanf, float, (float x));
1284 _GL_CXXALIASWARN (tanf);
1285 #elif defined GNULIB_POSIXCHECK
1287 # if HAVE_RAW_DECL_TANF
1288 _GL_WARN_ON_USE (tanf, "tanf is unportable - "
1289 "use gnulib module tanf for portability");
1294 # if !@HAVE_TANL@ || !@HAVE_DECL_TANL@
1296 _GL_FUNCDECL_SYS (tanl, long double, (long double x));
1298 _GL_CXXALIAS_SYS (tanl, long double, (long double x));
1299 _GL_CXXALIASWARN (tanl);
1300 #elif defined GNULIB_POSIXCHECK
1302 # if HAVE_RAW_DECL_TANL
1303 _GL_WARN_ON_USE (tanl, "tanl is unportable - "
1304 "use gnulib module mathl for portability");
1312 _GL_FUNCDECL_SYS (tanhf, float, (float x));
1314 _GL_CXXALIAS_SYS (tanhf, float, (float x));
1315 _GL_CXXALIASWARN (tanhf);
1316 #elif defined GNULIB_POSIXCHECK
1318 # if HAVE_RAW_DECL_TANHF
1319 _GL_WARN_ON_USE (tanhf, "tanhf is unportable - "
1320 "use gnulib module tanhf for portability");
1326 # if @REPLACE_TRUNCF@
1327 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
1328 # define truncf rpl_truncf
1330 _GL_FUNCDECL_RPL (truncf, float, (float x));
1331 _GL_CXXALIAS_RPL (truncf, float, (float x));
1333 # if !@HAVE_DECL_TRUNCF@
1334 _GL_FUNCDECL_SYS (truncf, float, (float x));
1336 _GL_CXXALIAS_SYS (truncf, float, (float x));
1338 _GL_CXXALIASWARN (truncf);
1339 #elif defined GNULIB_POSIXCHECK
1341 # if HAVE_RAW_DECL_TRUNCF
1342 _GL_WARN_ON_USE (truncf, "truncf is unportable - "
1343 "use gnulib module truncf for portability");
1348 # if @REPLACE_TRUNC@
1349 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
1350 # define trunc rpl_trunc
1352 _GL_FUNCDECL_RPL (trunc, double, (double x));
1353 _GL_CXXALIAS_RPL (trunc, double, (double x));
1355 # if !@HAVE_DECL_TRUNC@
1356 _GL_FUNCDECL_SYS (trunc, double, (double x));
1358 _GL_CXXALIAS_SYS (trunc, double, (double x));
1360 _GL_CXXALIASWARN (trunc);
1361 #elif defined GNULIB_POSIXCHECK
1363 # if HAVE_RAW_DECL_TRUNC
1364 _GL_WARN_ON_USE (trunc, "trunc is unportable - "
1365 "use gnulib module trunc for portability");
1370 # if @REPLACE_TRUNCL@
1371 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
1373 # define truncl rpl_truncl
1375 _GL_FUNCDECL_RPL (truncl, long double, (long double x));
1376 _GL_CXXALIAS_RPL (truncl, long double, (long double x));
1378 # if !@HAVE_DECL_TRUNCL@
1379 _GL_FUNCDECL_SYS (truncl, long double, (long double x));
1381 _GL_CXXALIAS_SYS (truncl, long double, (long double x));
1383 _GL_CXXALIASWARN (truncl);
1384 #elif defined GNULIB_POSIXCHECK
1386 # if HAVE_RAW_DECL_TRUNCL
1387 _GL_WARN_ON_USE (truncl, "truncl is unportable - "
1388 "use gnulib module truncl for portability");
1393 /* Definitions of function-like macros come here, after the function
1397 #if @GNULIB_ISFINITE@
1398 # if @REPLACE_ISFINITE@
1399 _GL_EXTERN_C int gl_isfinitef (float x);
1400 _GL_EXTERN_C int gl_isfinited (double x);
1401 _GL_EXTERN_C int gl_isfinitel (long double x);
1403 # define isfinite(x) \
1404 (sizeof (x) == sizeof (long double) ? gl_isfinitel (x) : \
1405 sizeof (x) == sizeof (double) ? gl_isfinited (x) : \
1410 _GL_MATH_CXX_REAL_FLOATING_DECL_1 (isfinite)
1412 _GL_MATH_CXX_REAL_FLOATING_DECL_2 (isfinite)
1415 #elif defined GNULIB_POSIXCHECK
1416 # if defined isfinite
1417 _GL_WARN_REAL_FLOATING_DECL (isfinite);
1419 # define isfinite(x) _GL_WARN_REAL_FLOATING_IMPL (isfinite, x)
1425 # if @REPLACE_ISINF@
1426 _GL_EXTERN_C int gl_isinff (float x);
1427 _GL_EXTERN_C int gl_isinfd (double x);
1428 _GL_EXTERN_C int gl_isinfl (long double x);
1431 (sizeof (x) == sizeof (long double) ? gl_isinfl (x) : \
1432 sizeof (x) == sizeof (double) ? gl_isinfd (x) : \
1437 _GL_MATH_CXX_REAL_FLOATING_DECL_1 (isinf)
1439 _GL_MATH_CXX_REAL_FLOATING_DECL_2 (isinf)
1442 #elif defined GNULIB_POSIXCHECK
1444 _GL_WARN_REAL_FLOATING_DECL (isinf);
1446 # define isinf(x) _GL_WARN_REAL_FLOATING_IMPL (isinf, x)
1452 /* Test for NaN for 'float' numbers. */
1454 /* The original <math.h> included above provides a declaration of isnan macro
1455 or (older) isnanf function. */
1457 /* GCC 4.0 and newer provides three built-ins for isnan. */
1459 # define isnanf(x) __builtin_isnanf ((float)(x))
1460 # elif defined isnan
1462 # define isnanf(x) isnan ((float)(x))
1465 /* Test whether X is a NaN. */
1467 # define isnanf rpl_isnanf
1468 _GL_EXTERN_C int isnanf (float x);
1473 /* Test for NaN for 'double' numbers.
1474 This function is a gnulib extension, unlike isnan() which applied only
1475 to 'double' numbers earlier but now is a type-generic macro. */
1477 /* The original <math.h> included above provides a declaration of isnan
1480 /* GCC 4.0 and newer provides three built-ins for isnan. */
1482 # define isnand(x) __builtin_isnan ((double)(x))
1485 # define isnand(x) isnan ((double)(x))
1488 /* Test whether X is a NaN. */
1490 # define isnand rpl_isnand
1491 _GL_EXTERN_C int isnand (double x);
1496 /* Test for NaN for 'long double' numbers. */
1498 /* The original <math.h> included above provides a declaration of isnan
1499 macro or (older) isnanl function. */
1501 /* GCC 4.0 and newer provides three built-ins for isnan. */
1503 # define isnanl(x) __builtin_isnanl ((long double)(x))
1504 # elif defined isnan
1506 # define isnanl(x) isnan ((long double)(x))
1509 /* Test whether X is a NaN. */
1511 # define isnanl rpl_isnanl
1512 _GL_EXTERN_C int isnanl (long double x) _GL_ATTRIBUTE_CONST;
1516 /* This must come *after* the snippets for GNULIB_ISNANF and GNULIB_ISNANL! */
1518 # if @REPLACE_ISNAN@
1519 /* We can't just use the isnanf macro (e.g.) as exposed by
1520 isnanf.h (e.g.) here, because those may end up being macros
1521 that recursively expand back to isnan. So use the gnulib
1522 replacements for them directly. */
1523 # if @HAVE_ISNANF@ && __GNUC__ >= 4
1524 # define gl_isnan_f(x) __builtin_isnanf ((float)(x))
1526 _GL_EXTERN_C int rpl_isnanf (float x);
1527 # define gl_isnan_f(x) rpl_isnanf (x)
1529 # if @HAVE_ISNAND@ && __GNUC__ >= 4
1530 # define gl_isnan_d(x) __builtin_isnan ((double)(x))
1532 _GL_EXTERN_C int rpl_isnand (double x);
1533 # define gl_isnan_d(x) rpl_isnand (x)
1535 # if @HAVE_ISNANL@ && __GNUC__ >= 4
1536 # define gl_isnan_l(x) __builtin_isnanl ((long double)(x))
1538 _GL_EXTERN_C int rpl_isnanl (long double x) _GL_ATTRIBUTE_CONST;
1539 # define gl_isnan_l(x) rpl_isnanl (x)
1543 (sizeof (x) == sizeof (long double) ? gl_isnan_l (x) : \
1544 sizeof (x) == sizeof (double) ? gl_isnan_d (x) : \
1546 # elif __GNUC__ >= 4
1549 (sizeof (x) == sizeof (long double) ? __builtin_isnanl ((long double)(x)) : \
1550 sizeof (x) == sizeof (double) ? __builtin_isnan ((double)(x)) : \
1551 __builtin_isnanf ((float)(x)))
1555 _GL_MATH_CXX_REAL_FLOATING_DECL_1 (isnan)
1557 _GL_MATH_CXX_REAL_FLOATING_DECL_2 (isnan)
1560 /* Ensure isnan is a macro. */
1562 # define isnan isnan
1565 #elif defined GNULIB_POSIXCHECK
1567 _GL_WARN_REAL_FLOATING_DECL (isnan);
1569 # define isnan(x) _GL_WARN_REAL_FLOATING_IMPL (isnan, x)
1574 #if @GNULIB_SIGNBIT@
1575 # if @REPLACE_SIGNBIT_USING_GCC@
1577 /* GCC 4.0 and newer provides three built-ins for signbit. */
1578 # define signbit(x) \
1579 (sizeof (x) == sizeof (long double) ? __builtin_signbitl (x) : \
1580 sizeof (x) == sizeof (double) ? __builtin_signbit (x) : \
1581 __builtin_signbitf (x))
1583 # if @REPLACE_SIGNBIT@
1585 _GL_EXTERN_C int gl_signbitf (float arg);
1586 _GL_EXTERN_C int gl_signbitd (double arg);
1587 _GL_EXTERN_C int gl_signbitl (long double arg);
1588 # if __GNUC__ >= 2 && !defined __STRICT_ANSI__
1589 # define _GL_NUM_UINT_WORDS(type) \
1590 ((sizeof (type) + sizeof (unsigned int) - 1) / sizeof (unsigned int))
1591 # if defined FLT_SIGNBIT_WORD && defined FLT_SIGNBIT_BIT && !defined gl_signbitf
1592 # define gl_signbitf_OPTIMIZED_MACRO
1593 # define gl_signbitf(arg) \
1594 ({ union { float _value; \
1595 unsigned int _word[_GL_NUM_UINT_WORDS (float)]; \
1597 _m._value = (arg); \
1598 (_m._word[FLT_SIGNBIT_WORD] >> FLT_SIGNBIT_BIT) & 1; \
1601 # if defined DBL_SIGNBIT_WORD && defined DBL_SIGNBIT_BIT && !defined gl_signbitd
1602 # define gl_signbitd_OPTIMIZED_MACRO
1603 # define gl_signbitd(arg) \
1604 ({ union { double _value; \
1605 unsigned int _word[_GL_NUM_UINT_WORDS (double)]; \
1607 _m._value = (arg); \
1608 (_m._word[DBL_SIGNBIT_WORD] >> DBL_SIGNBIT_BIT) & 1; \
1611 # if defined LDBL_SIGNBIT_WORD && defined LDBL_SIGNBIT_BIT && !defined gl_signbitl
1612 # define gl_signbitl_OPTIMIZED_MACRO
1613 # define gl_signbitl(arg) \
1614 ({ union { long double _value; \
1615 unsigned int _word[_GL_NUM_UINT_WORDS (long double)]; \
1617 _m._value = (arg); \
1618 (_m._word[LDBL_SIGNBIT_WORD] >> LDBL_SIGNBIT_BIT) & 1; \
1622 # define signbit(x) \
1623 (sizeof (x) == sizeof (long double) ? gl_signbitl (x) : \
1624 sizeof (x) == sizeof (double) ? gl_signbitd (x) : \
1629 _GL_MATH_CXX_REAL_FLOATING_DECL_1 (signbit)
1631 _GL_MATH_CXX_REAL_FLOATING_DECL_2 (signbit)
1634 #elif defined GNULIB_POSIXCHECK
1635 # if defined signbit
1636 _GL_WARN_REAL_FLOATING_DECL (signbit);
1638 # define signbit(x) _GL_WARN_REAL_FLOATING_IMPL (signbit, x)
1643 #endif /* _@GUARD_PREFIX@_MATH_H */
1644 #endif /* _@GUARD_PREFIX@_MATH_H */