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 _GL_FUNCDECL_SYS (cbrt, double, (double x));
295 _GL_CXXALIAS_SYS (cbrt, double, (double x));
296 _GL_CXXALIASWARN (cbrt);
297 #elif defined GNULIB_POSIXCHECK
299 # if HAVE_RAW_DECL_CBRT
300 _GL_WARN_ON_USE (cbrt, "cbrt is unportable - "
301 "use gnulib module cbrt for portability");
308 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
310 # define ceilf rpl_ceilf
312 _GL_FUNCDECL_RPL (ceilf, float, (float x));
313 _GL_CXXALIAS_RPL (ceilf, float, (float x));
315 # if !@HAVE_DECL_CEILF@
317 _GL_FUNCDECL_SYS (ceilf, float, (float x));
319 _GL_CXXALIAS_SYS (ceilf, float, (float x));
321 _GL_CXXALIASWARN (ceilf);
322 #elif defined GNULIB_POSIXCHECK
324 # if HAVE_RAW_DECL_CEILF
325 _GL_WARN_ON_USE (ceilf, "ceilf is unportable - "
326 "use gnulib module ceilf for portability");
332 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
333 # define ceil rpl_ceil
335 _GL_FUNCDECL_RPL (ceil, double, (double x));
336 _GL_CXXALIAS_RPL (ceil, double, (double x));
338 _GL_CXXALIAS_SYS (ceil, double, (double x));
340 _GL_CXXALIASWARN (ceil);
345 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
347 # define ceill rpl_ceill
349 _GL_FUNCDECL_RPL (ceill, long double, (long double x));
350 _GL_CXXALIAS_RPL (ceill, long double, (long double x));
352 # if !@HAVE_DECL_CEILL@
354 _GL_FUNCDECL_SYS (ceill, long double, (long double x));
356 _GL_CXXALIAS_SYS (ceill, long double, (long double x));
358 _GL_CXXALIASWARN (ceill);
359 #elif defined GNULIB_POSIXCHECK
361 # if HAVE_RAW_DECL_CEILL
362 _GL_WARN_ON_USE (ceill, "ceill is unportable - "
363 "use gnulib module ceill for portability");
368 #if @GNULIB_COPYSIGNF@
369 # if !@HAVE_COPYSIGNF@
370 _GL_FUNCDECL_SYS (copysignf, float, (float x, float y));
372 _GL_CXXALIAS_SYS (copysignf, float, (float x, float y));
373 _GL_CXXALIASWARN (copysignf);
374 #elif defined GNULIB_POSIXCHECK
376 # if HAVE_RAW_DECL_COPYSIGNF
377 _GL_WARN_ON_USE (copysignf, "copysignf is unportable - "
378 "use gnulib module copysignf for portability");
382 #if @GNULIB_COPYSIGN@
383 # if !@HAVE_COPYSIGN@
384 _GL_FUNCDECL_SYS (copysign, double, (double x, double y));
386 _GL_CXXALIAS_SYS (copysign, double, (double x, double y));
387 _GL_CXXALIASWARN (copysign);
388 #elif defined GNULIB_POSIXCHECK
390 # if HAVE_RAW_DECL_COPYSIGN
391 _GL_WARN_ON_USE (copysign, "copysign is unportable - "
392 "use gnulib module copysign for portability");
396 #if @GNULIB_COPYSIGNL@
397 # if !@HAVE_COPYSIGNL@
398 _GL_FUNCDECL_SYS (copysignl, long double, (long double x, long double y));
400 _GL_CXXALIAS_SYS (copysignl, long double, (long double x, long double y));
401 _GL_CXXALIASWARN (copysignl);
402 #elif defined GNULIB_POSIXCHECK
404 # if HAVE_RAW_DECL_COPYSIGNL
405 _GL_WARN_ON_USE (copysign, "copysignl is unportable - "
406 "use gnulib module copysignl for portability");
414 _GL_FUNCDECL_SYS (cosf, float, (float x));
416 _GL_CXXALIAS_SYS (cosf, float, (float x));
417 _GL_CXXALIASWARN (cosf);
418 #elif defined GNULIB_POSIXCHECK
420 # if HAVE_RAW_DECL_COSF
421 _GL_WARN_ON_USE (cosf, "cosf is unportable - "
422 "use gnulib module cosf for portability");
427 # if !@HAVE_COSL@ || !@HAVE_DECL_COSL@
429 _GL_FUNCDECL_SYS (cosl, long double, (long double x));
431 _GL_CXXALIAS_SYS (cosl, long double, (long double x));
432 _GL_CXXALIASWARN (cosl);
433 #elif defined GNULIB_POSIXCHECK
435 # if HAVE_RAW_DECL_COSL
436 _GL_WARN_ON_USE (cosl, "cosl is unportable - "
437 "use gnulib module mathl for portability");
445 _GL_FUNCDECL_SYS (coshf, float, (float x));
447 _GL_CXXALIAS_SYS (coshf, float, (float x));
448 _GL_CXXALIASWARN (coshf);
449 #elif defined GNULIB_POSIXCHECK
451 # if HAVE_RAW_DECL_COSHF
452 _GL_WARN_ON_USE (coshf, "coshf is unportable - "
453 "use gnulib module coshf for portability");
461 _GL_FUNCDECL_SYS (expf, float, (float x));
463 _GL_CXXALIAS_SYS (expf, float, (float x));
464 _GL_CXXALIASWARN (expf);
465 #elif defined GNULIB_POSIXCHECK
467 # if HAVE_RAW_DECL_EXPF
468 _GL_WARN_ON_USE (expf, "expf is unportable - "
469 "use gnulib module expf for portability");
474 # if !@HAVE_EXPL@ || !@HAVE_DECL_EXPL@
476 _GL_FUNCDECL_SYS (expl, long double, (long double x));
478 _GL_CXXALIAS_SYS (expl, long double, (long double x));
479 _GL_CXXALIASWARN (expl);
480 #elif defined GNULIB_POSIXCHECK
482 # if HAVE_RAW_DECL_EXPL
483 _GL_WARN_ON_USE (expl, "expl is unportable - "
484 "use gnulib module mathl for portability");
492 _GL_FUNCDECL_SYS (fabsf, float, (float x));
494 _GL_CXXALIAS_SYS (fabsf, float, (float x));
495 _GL_CXXALIASWARN (fabsf);
496 #elif defined GNULIB_POSIXCHECK
498 # if HAVE_RAW_DECL_FABSF
499 _GL_WARN_ON_USE (fabsf, "fabsf is unportable - "
500 "use gnulib module fabsf for portability");
506 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
508 # define fabsl rpl_fabsl
510 _GL_FUNCDECL_RPL (fabsl, long double, (long double x));
511 _GL_CXXALIAS_RPL (fabsl, long double, (long double x));
515 _GL_FUNCDECL_SYS (fabsl, long double, (long double x));
517 _GL_CXXALIAS_SYS (fabsl, long double, (long double x));
519 _GL_CXXALIASWARN (fabsl);
520 #elif defined GNULIB_POSIXCHECK
522 # if HAVE_RAW_DECL_FABSL
523 _GL_WARN_ON_USE (fabsl, "fabsl is unportable - "
524 "use gnulib module fabsl for portability");
530 # if @REPLACE_FLOORF@
531 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
533 # define floorf rpl_floorf
535 _GL_FUNCDECL_RPL (floorf, float, (float x));
536 _GL_CXXALIAS_RPL (floorf, float, (float x));
538 # if !@HAVE_DECL_FLOORF@
540 _GL_FUNCDECL_SYS (floorf, float, (float x));
542 _GL_CXXALIAS_SYS (floorf, float, (float x));
544 _GL_CXXALIASWARN (floorf);
545 #elif defined GNULIB_POSIXCHECK
547 # if HAVE_RAW_DECL_FLOORF
548 _GL_WARN_ON_USE (floorf, "floorf is unportable - "
549 "use gnulib module floorf for portability");
555 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
556 # define floor rpl_floor
558 _GL_FUNCDECL_RPL (floor, double, (double x));
559 _GL_CXXALIAS_RPL (floor, double, (double x));
561 _GL_CXXALIAS_SYS (floor, double, (double x));
563 _GL_CXXALIASWARN (floor);
567 # if @REPLACE_FLOORL@
568 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
570 # define floorl rpl_floorl
572 _GL_FUNCDECL_RPL (floorl, long double, (long double x));
573 _GL_CXXALIAS_RPL (floorl, long double, (long double x));
575 # if !@HAVE_DECL_FLOORL@
577 _GL_FUNCDECL_SYS (floorl, long double, (long double x));
579 _GL_CXXALIAS_SYS (floorl, long double, (long double x));
581 _GL_CXXALIASWARN (floorl);
582 #elif defined GNULIB_POSIXCHECK
584 # if HAVE_RAW_DECL_FLOORL
585 _GL_WARN_ON_USE (floorl, "floorl is unportable - "
586 "use gnulib module floorl for portability");
593 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
595 # define fmaf rpl_fmaf
597 _GL_FUNCDECL_RPL (fmaf, float, (float x, float y, float z));
598 _GL_CXXALIAS_RPL (fmaf, float, (float x, float y, float z));
601 _GL_FUNCDECL_SYS (fmaf, float, (float x, float y, float z));
603 _GL_CXXALIAS_SYS (fmaf, float, (float x, float y, float z));
605 _GL_CXXALIASWARN (fmaf);
606 #elif defined GNULIB_POSIXCHECK
608 # if HAVE_RAW_DECL_FMAF
609 _GL_WARN_ON_USE (fmaf, "fmaf is unportable - "
610 "use gnulib module fmaf for portability");
616 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
620 _GL_FUNCDECL_RPL (fma, double, (double x, double y, double z));
621 _GL_CXXALIAS_RPL (fma, double, (double x, double y, double z));
624 _GL_FUNCDECL_SYS (fma, double, (double x, double y, double z));
626 _GL_CXXALIAS_SYS (fma, double, (double x, double y, double z));
628 _GL_CXXALIASWARN (fma);
629 #elif defined GNULIB_POSIXCHECK
631 # if HAVE_RAW_DECL_FMA
632 _GL_WARN_ON_USE (fma, "fma is unportable - "
633 "use gnulib module fma for portability");
639 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
641 # define fmal rpl_fmal
643 _GL_FUNCDECL_RPL (fmal, long double,
644 (long double x, long double y, long double z));
645 _GL_CXXALIAS_RPL (fmal, long double,
646 (long double x, long double y, long double z));
649 _GL_FUNCDECL_SYS (fmal, long double,
650 (long double x, long double y, long double z));
652 _GL_CXXALIAS_SYS (fmal, long double,
653 (long double x, long double y, long double z));
655 _GL_CXXALIASWARN (fmal);
656 #elif defined GNULIB_POSIXCHECK
658 # if HAVE_RAW_DECL_FMAL
659 _GL_WARN_ON_USE (fmal, "fmal is unportable - "
660 "use gnulib module fmal for portability");
667 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
669 # define fmodf rpl_fmodf
671 _GL_FUNCDECL_RPL (fmodf, float, (float x, float y));
672 _GL_CXXALIAS_RPL (fmodf, float, (float x, float y));
676 _GL_FUNCDECL_SYS (fmodf, float, (float x, float y));
678 _GL_CXXALIAS_SYS (fmodf, float, (float x, float y));
680 _GL_CXXALIASWARN (fmodf);
681 #elif defined GNULIB_POSIXCHECK
683 # if HAVE_RAW_DECL_FMODF
684 _GL_WARN_ON_USE (fmodf, "fmodf is unportable - "
685 "use gnulib module fmodf for portability");
691 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
693 # define fmod rpl_fmod
695 _GL_FUNCDECL_RPL (fmod, double, (double x, double y));
696 _GL_CXXALIAS_RPL (fmod, double, (double x, double y));
698 _GL_CXXALIAS_SYS (fmod, double, (double x, double y));
700 _GL_CXXALIASWARN (fmod);
701 #elif defined GNULIB_POSIXCHECK
703 # if HAVE_RAW_DECL_FMOD
704 _GL_WARN_ON_USE (fmod, "fmod has portability problems - "
705 "use gnulib module fmod for portability");
711 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
713 # define fmodl rpl_fmodl
715 _GL_FUNCDECL_RPL (fmodl, long double, (long double x, long double y));
716 _GL_CXXALIAS_RPL (fmodl, long double, (long double x, long double y));
720 _GL_FUNCDECL_SYS (fmodl, long double, (long double x, long double y));
722 _GL_CXXALIAS_SYS (fmodl, long double, (long double x, long double y));
724 _GL_CXXALIASWARN (fmodl);
725 #elif defined GNULIB_POSIXCHECK
727 # if HAVE_RAW_DECL_FMODL
728 _GL_WARN_ON_USE (fmodl, "fmodl is unportable - "
729 "use gnulib module fmodl for portability");
737 If x finite and nonzero: 0.5 <= |mantissa| < 1.0.
738 If x is zero: mantissa = x, exp = 0.
739 If x is infinite or NaN: mantissa = x, exp unspecified.
740 Store exp in *EXPPTR and return mantissa. */
742 # if @REPLACE_FREXPF@
743 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
745 # define frexpf rpl_frexpf
747 _GL_FUNCDECL_RPL (frexpf, float, (float x, int *expptr) _GL_ARG_NONNULL ((2)));
748 _GL_CXXALIAS_RPL (frexpf, float, (float x, int *expptr));
752 _GL_FUNCDECL_SYS (frexpf, float, (float x, int *expptr) _GL_ARG_NONNULL ((2)));
754 _GL_CXXALIAS_SYS (frexpf, float, (float x, int *expptr));
756 _GL_CXXALIASWARN (frexpf);
757 #elif defined GNULIB_POSIXCHECK
759 # if HAVE_RAW_DECL_FREXPF
760 _GL_WARN_ON_USE (frexpf, "frexpf is unportable - "
761 "use gnulib module frexpf for portability");
768 If x finite and nonzero: 0.5 <= |mantissa| < 1.0.
769 If x is zero: mantissa = x, exp = 0.
770 If x is infinite or NaN: mantissa = x, exp unspecified.
771 Store exp in *EXPPTR and return mantissa. */
774 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
775 # define frexp rpl_frexp
777 _GL_FUNCDECL_RPL (frexp, double, (double x, int *expptr) _GL_ARG_NONNULL ((2)));
778 _GL_CXXALIAS_RPL (frexp, double, (double x, int *expptr));
780 _GL_CXXALIAS_SYS (frexp, double, (double x, int *expptr));
782 _GL_CXXALIASWARN (frexp);
783 #elif defined GNULIB_POSIXCHECK
785 /* Assume frexp is always declared. */
786 _GL_WARN_ON_USE (frexp, "frexp is unportable - "
787 "use gnulib module frexp for portability");
793 If x finite and nonzero: 0.5 <= |mantissa| < 1.0.
794 If x is zero: mantissa = x, exp = 0.
795 If x is infinite or NaN: mantissa = x, exp unspecified.
796 Store exp in *EXPPTR and return mantissa. */
797 #if @GNULIB_FREXPL@ && @REPLACE_FREXPL@
798 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
800 # define frexpl rpl_frexpl
802 _GL_FUNCDECL_RPL (frexpl, long double,
803 (long double x, int *expptr) _GL_ARG_NONNULL ((2)));
804 _GL_CXXALIAS_RPL (frexpl, long double, (long double x, int *expptr));
806 # if !@HAVE_DECL_FREXPL@
807 _GL_FUNCDECL_SYS (frexpl, long double,
808 (long double x, int *expptr) _GL_ARG_NONNULL ((2)));
811 _GL_CXXALIAS_SYS (frexpl, long double, (long double x, int *expptr));
814 #if @GNULIB_FREXPL@ && !(@REPLACE_FREXPL@ && !@HAVE_DECL_FREXPL@)
815 _GL_CXXALIASWARN (frexpl);
817 #if !@GNULIB_FREXPL@ && defined GNULIB_POSIXCHECK
819 # if HAVE_RAW_DECL_FREXPL
820 _GL_WARN_ON_USE (frexpl, "frexpl is unportable - "
821 "use gnulib module frexpl for portability");
826 /* Return sqrt(x^2+y^2). */
828 # if @REPLACE_HYPOTF@
829 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
831 # define hypotf rpl_hypotf
833 _GL_FUNCDECL_RPL (hypotf, float, (float x, float y));
834 _GL_CXXALIAS_RPL (hypotf, float, (float x, float y));
837 _GL_FUNCDECL_SYS (hypotf, float, (float x, float y));
839 _GL_CXXALIAS_SYS (hypotf, float, (float x, float y));
841 _GL_CXXALIASWARN (hypotf);
842 #elif defined GNULIB_POSIXCHECK
844 # if HAVE_RAW_DECL_HYPOTF
845 _GL_WARN_ON_USE (hypotf, "hypotf is unportable - "
846 "use gnulib module hypotf for portability");
850 /* Return sqrt(x^2+y^2). */
853 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
855 # define hypot rpl_hypot
857 _GL_FUNCDECL_RPL (hypot, double, (double x, double y));
858 _GL_CXXALIAS_RPL (hypot, double, (double x, double y));
860 _GL_CXXALIAS_SYS (hypot, double, (double x, double y));
862 _GL_CXXALIASWARN (hypot);
863 #elif defined GNULIB_POSIXCHECK
865 # if HAVE_RAW_DECL_HYPOT
866 _GL_WARN_ON_USE (hypotf, "hypot has portability problems - "
867 "use gnulib module hypot for portability");
871 /* Return sqrt(x^2+y^2). */
873 # if @REPLACE_HYPOTL@
874 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
876 # define hypotl rpl_hypotl
878 _GL_FUNCDECL_RPL (hypotl, long double, (long double x, long double y));
879 _GL_CXXALIAS_RPL (hypotl, long double, (long double x, long double y));
882 _GL_FUNCDECL_SYS (hypotl, long double, (long double x, long double y));
884 _GL_CXXALIAS_SYS (hypotl, long double, (long double x, long double y));
886 _GL_CXXALIASWARN (hypotl);
887 #elif defined GNULIB_POSIXCHECK
889 # if HAVE_RAW_DECL_HYPOTL
890 _GL_WARN_ON_USE (hypotl, "hypotl is unportable - "
891 "use gnulib module hypotl for portability");
896 /* Return x * 2^exp. */
900 _GL_FUNCDECL_SYS (ldexpf, float, (float x, int exp));
902 _GL_CXXALIAS_SYS (ldexpf, float, (float x, int exp));
903 _GL_CXXALIASWARN (ldexpf);
904 #elif defined GNULIB_POSIXCHECK
906 # if HAVE_RAW_DECL_LDEXPF
907 _GL_WARN_ON_USE (ldexpf, "ldexpf is unportable - "
908 "use gnulib module ldexpf for portability");
912 /* Return x * 2^exp. */
913 #if @GNULIB_LDEXPL@ && @REPLACE_LDEXPL@
914 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
916 # define ldexpl rpl_ldexpl
918 _GL_FUNCDECL_RPL (ldexpl, long double, (long double x, int exp));
919 _GL_CXXALIAS_RPL (ldexpl, long double, (long double x, int exp));
921 # if !@HAVE_DECL_LDEXPL@
922 _GL_FUNCDECL_SYS (ldexpl, long double, (long double x, int exp));
925 _GL_CXXALIAS_SYS (ldexpl, long double, (long double x, int exp));
929 _GL_CXXALIASWARN (ldexpl);
931 #if !@GNULIB_LDEXPL@ && defined GNULIB_POSIXCHECK
933 # if HAVE_RAW_DECL_LDEXPL
934 _GL_WARN_ON_USE (ldexpl, "ldexpl is unportable - "
935 "use gnulib module ldexpl for portability");
941 # if !@HAVE_DECL_LOGB@
942 _GL_EXTERN_C double logb (double x);
944 #elif defined GNULIB_POSIXCHECK
946 # if HAVE_RAW_DECL_LOGB
947 _GL_WARN_ON_USE (logb, "logb is unportable - "
948 "use gnulib module logb for portability");
956 _GL_FUNCDECL_SYS (logf, float, (float x));
958 _GL_CXXALIAS_SYS (logf, float, (float x));
959 _GL_CXXALIASWARN (logf);
960 #elif defined GNULIB_POSIXCHECK
962 # if HAVE_RAW_DECL_LOGF
963 _GL_WARN_ON_USE (logf, "logf is unportable - "
964 "use gnulib module logf for portability");
969 # if !@HAVE_LOGL@ || !@HAVE_DECL_LOGL@
971 _GL_FUNCDECL_SYS (logl, long double, (long double x));
973 _GL_CXXALIAS_SYS (logl, long double, (long double x));
974 _GL_CXXALIASWARN (logl);
975 #elif defined GNULIB_POSIXCHECK
977 # if HAVE_RAW_DECL_LOGL
978 _GL_WARN_ON_USE (logl, "logl is unportable - "
979 "use gnulib module mathl for portability");
987 _GL_FUNCDECL_SYS (log10f, float, (float x));
989 _GL_CXXALIAS_SYS (log10f, float, (float x));
990 _GL_CXXALIASWARN (log10f);
991 #elif defined GNULIB_POSIXCHECK
993 # if HAVE_RAW_DECL_LOG10F
994 _GL_WARN_ON_USE (log10f, "log10f is unportable - "
995 "use gnulib module log10f for portability");
1000 # if !@HAVE_LOG10L@ || !@HAVE_DECL_LOG10L@
1002 _GL_FUNCDECL_SYS (log10l, long double, (long double x));
1004 _GL_CXXALIAS_SYS (log10l, long double, (long double x));
1005 _GL_CXXALIASWARN (log10l);
1006 #elif defined GNULIB_POSIXCHECK
1008 # if HAVE_RAW_DECL_LOG10L
1009 _GL_WARN_ON_USE (log10l, "log10l is unportable - "
1010 "use gnulib module log10l for portability");
1016 # if @REPLACE_MODFF@
1017 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
1019 # define modff rpl_modff
1021 _GL_FUNCDECL_RPL (modff, float, (float x, float *iptr) _GL_ARG_NONNULL ((2)));
1022 _GL_CXXALIAS_RPL (modff, float, (float x, float *iptr));
1026 _GL_FUNCDECL_SYS (modff, float, (float x, float *iptr) _GL_ARG_NONNULL ((2)));
1028 _GL_CXXALIAS_SYS (modff, float, (float x, float *iptr));
1030 _GL_CXXALIASWARN (modff);
1031 #elif defined GNULIB_POSIXCHECK
1033 # if HAVE_RAW_DECL_MODFF
1034 _GL_WARN_ON_USE (modff, "modff is unportable - "
1035 "use gnulib module modff for portability");
1041 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
1043 # define modf rpl_modf
1045 _GL_FUNCDECL_RPL (modf, double, (double x, double *iptr) _GL_ARG_NONNULL ((2)));
1046 _GL_CXXALIAS_RPL (modf, double, (double x, double *iptr));
1048 _GL_CXXALIAS_SYS (modf, double, (double x, double *iptr));
1050 _GL_CXXALIASWARN (modf);
1051 #elif defined GNULIB_POSIXCHECK
1053 # if HAVE_RAW_DECL_MODF
1054 _GL_WARN_ON_USE (modf, "modf has portability problems - "
1055 "use gnulib module modf for portability");
1060 # if @REPLACE_MODFL@
1061 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
1063 # define modfl rpl_modfl
1065 _GL_FUNCDECL_RPL (modfl, long double, (long double x, long double *iptr)
1066 _GL_ARG_NONNULL ((2)));
1067 _GL_CXXALIAS_RPL (modfl, long double, (long double x, long double *iptr));
1071 _GL_FUNCDECL_SYS (modfl, long double, (long double x, long double *iptr)
1072 _GL_ARG_NONNULL ((2)));
1074 _GL_CXXALIAS_SYS (modfl, long double, (long double x, long double *iptr));
1076 _GL_CXXALIASWARN (modfl);
1077 #elif defined GNULIB_POSIXCHECK
1079 # if HAVE_RAW_DECL_MODFL
1080 _GL_WARN_ON_USE (modfl, "modfl is unportable - "
1081 "use gnulib module modfl for portability");
1089 _GL_FUNCDECL_SYS (powf, float, (float x, float y));
1091 _GL_CXXALIAS_SYS (powf, float, (float x, float y));
1092 _GL_CXXALIASWARN (powf);
1093 #elif defined GNULIB_POSIXCHECK
1095 # if HAVE_RAW_DECL_POWF
1096 _GL_WARN_ON_USE (powf, "powf is unportable - "
1097 "use gnulib module powf for portability");
1102 #if @GNULIB_REMAINDERF@
1103 # if @REPLACE_REMAINDERF@
1104 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
1106 # define remainderf rpl_remainderf
1108 _GL_FUNCDECL_RPL (remainderf, float, (float x, float y));
1109 _GL_CXXALIAS_RPL (remainderf, float, (float x, float y));
1111 # if !@HAVE_REMAINDERF@
1112 _GL_FUNCDECL_SYS (remainderf, float, (float x, float y));
1114 _GL_CXXALIAS_SYS (remainderf, float, (float x, float y));
1116 _GL_CXXALIASWARN (remainderf);
1117 #elif defined GNULIB_POSIXCHECK
1119 # if HAVE_RAW_DECL_REMAINDERF
1120 _GL_WARN_ON_USE (remainderf, "remainderf is unportable - "
1121 "use gnulib module remainderf for portability");
1125 #if @GNULIB_REMAINDER@
1126 # if @REPLACE_REMAINDER@
1127 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
1129 # define remainder rpl_remainder
1131 _GL_FUNCDECL_RPL (remainder, double, (double x, double y));
1132 _GL_CXXALIAS_RPL (remainder, double, (double x, double y));
1134 # if !@HAVE_REMAINDER@ || !@HAVE_DECL_REMAINDER@
1135 _GL_FUNCDECL_SYS (remainder, double, (double x, double y));
1137 _GL_CXXALIAS_SYS (remainder, double, (double x, double y));
1139 _GL_CXXALIASWARN (remainder);
1140 #elif defined GNULIB_POSIXCHECK
1142 # if HAVE_RAW_DECL_REMAINDER
1143 _GL_WARN_ON_USE (remainder, "remainder is unportable - "
1144 "use gnulib module remainder for portability");
1148 #if @GNULIB_REMAINDERL@
1149 # if @REPLACE_REMAINDERL@
1150 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
1152 # define remainderl rpl_remainderl
1154 _GL_FUNCDECL_RPL (remainderl, long double, (long double x, long double y));
1155 _GL_CXXALIAS_RPL (remainderl, long double, (long double x, long double y));
1157 # if !@HAVE_REMAINDERL@
1158 _GL_FUNCDECL_SYS (remainderl, long double, (long double x, long double y));
1160 _GL_CXXALIAS_SYS (remainderl, long double, (long double x, long double y));
1162 _GL_CXXALIASWARN (remainderl);
1163 #elif defined GNULIB_POSIXCHECK
1165 # if HAVE_RAW_DECL_REMAINDERL
1166 _GL_WARN_ON_USE (remainderl, "remainderl is unportable - "
1167 "use gnulib module remainderl for portability");
1174 _GL_FUNCDECL_SYS (rintf, float, (float x));
1176 _GL_CXXALIAS_SYS (rintf, float, (float x));
1177 _GL_CXXALIASWARN (rintf);
1178 #elif defined GNULIB_POSIXCHECK
1180 # if HAVE_RAW_DECL_RINTF
1181 _GL_WARN_ON_USE (rintf, "rintf is unportable - "
1182 "use gnulib module rintf for portability");
1188 _GL_FUNCDECL_SYS (rint, double, (double x));
1190 _GL_CXXALIAS_SYS (rint, double, (double x));
1191 _GL_CXXALIASWARN (rint);
1192 #elif defined GNULIB_POSIXCHECK
1194 # if HAVE_RAW_DECL_RINT
1195 _GL_WARN_ON_USE (rint, "rint is unportable - "
1196 "use gnulib module rint for portability");
1202 _GL_FUNCDECL_SYS (rintl, long double, (long double x));
1204 _GL_CXXALIAS_SYS (rintl, long double, (long double x));
1205 _GL_CXXALIASWARN (rintl);
1206 #elif defined GNULIB_POSIXCHECK
1208 # if HAVE_RAW_DECL_RINTL
1209 _GL_WARN_ON_USE (rintl, "rintl is unportable - "
1210 "use gnulib module rintl for portability");
1216 # if @REPLACE_ROUNDF@
1217 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
1219 # define roundf rpl_roundf
1221 _GL_FUNCDECL_RPL (roundf, float, (float x));
1222 _GL_CXXALIAS_RPL (roundf, float, (float x));
1224 # if !@HAVE_DECL_ROUNDF@
1225 _GL_FUNCDECL_SYS (roundf, float, (float x));
1227 _GL_CXXALIAS_SYS (roundf, float, (float x));
1229 _GL_CXXALIASWARN (roundf);
1230 #elif defined GNULIB_POSIXCHECK
1232 # if HAVE_RAW_DECL_ROUNDF
1233 _GL_WARN_ON_USE (roundf, "roundf is unportable - "
1234 "use gnulib module roundf for portability");
1239 # if @REPLACE_ROUND@
1240 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
1242 # define round rpl_round
1244 _GL_FUNCDECL_RPL (round, double, (double x));
1245 _GL_CXXALIAS_RPL (round, double, (double x));
1247 # if !@HAVE_DECL_ROUND@
1248 _GL_FUNCDECL_SYS (round, double, (double x));
1250 _GL_CXXALIAS_SYS (round, double, (double x));
1252 _GL_CXXALIASWARN (round);
1253 #elif defined GNULIB_POSIXCHECK
1255 # if HAVE_RAW_DECL_ROUND
1256 _GL_WARN_ON_USE (round, "round is unportable - "
1257 "use gnulib module round for portability");
1262 # if @REPLACE_ROUNDL@
1263 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
1265 # define roundl rpl_roundl
1267 _GL_FUNCDECL_RPL (roundl, long double, (long double x));
1268 _GL_CXXALIAS_RPL (roundl, long double, (long double x));
1270 # if !@HAVE_DECL_ROUNDL@
1271 _GL_FUNCDECL_SYS (roundl, long double, (long double x));
1273 _GL_CXXALIAS_SYS (roundl, long double, (long double x));
1275 _GL_CXXALIASWARN (roundl);
1276 #elif defined GNULIB_POSIXCHECK
1278 # if HAVE_RAW_DECL_ROUNDL
1279 _GL_WARN_ON_USE (roundl, "roundl is unportable - "
1280 "use gnulib module roundl for portability");
1288 _GL_FUNCDECL_SYS (sinf, float, (float x));
1290 _GL_CXXALIAS_SYS (sinf, float, (float x));
1291 _GL_CXXALIASWARN (sinf);
1292 #elif defined GNULIB_POSIXCHECK
1294 # if HAVE_RAW_DECL_SINF
1295 _GL_WARN_ON_USE (sinf, "sinf is unportable - "
1296 "use gnulib module sinf for portability");
1301 # if !@HAVE_SINL@ || !@HAVE_DECL_SINL@
1303 _GL_FUNCDECL_SYS (sinl, long double, (long double x));
1305 _GL_CXXALIAS_SYS (sinl, long double, (long double x));
1306 _GL_CXXALIASWARN (sinl);
1307 #elif defined GNULIB_POSIXCHECK
1309 # if HAVE_RAW_DECL_SINL
1310 _GL_WARN_ON_USE (sinl, "sinl is unportable - "
1311 "use gnulib module mathl for portability");
1319 _GL_FUNCDECL_SYS (sinhf, float, (float x));
1321 _GL_CXXALIAS_SYS (sinhf, float, (float x));
1322 _GL_CXXALIASWARN (sinhf);
1323 #elif defined GNULIB_POSIXCHECK
1325 # if HAVE_RAW_DECL_SINHF
1326 _GL_WARN_ON_USE (sinhf, "sinhf is unportable - "
1327 "use gnulib module sinhf for portability");
1335 _GL_FUNCDECL_SYS (sqrtf, float, (float x));
1337 _GL_CXXALIAS_SYS (sqrtf, float, (float x));
1338 _GL_CXXALIASWARN (sqrtf);
1339 #elif defined GNULIB_POSIXCHECK
1341 # if HAVE_RAW_DECL_SQRTF
1342 _GL_WARN_ON_USE (sqrtf, "sqrtf is unportable - "
1343 "use gnulib module sqrtf for portability");
1348 # if !@HAVE_SQRTL@ || !@HAVE_DECL_SQRTL@
1350 _GL_FUNCDECL_SYS (sqrtl, long double, (long double x));
1352 _GL_CXXALIAS_SYS (sqrtl, long double, (long double x));
1353 _GL_CXXALIASWARN (sqrtl);
1354 #elif defined GNULIB_POSIXCHECK
1356 # if HAVE_RAW_DECL_SQRTL
1357 _GL_WARN_ON_USE (sqrtl, "sqrtl is unportable - "
1358 "use gnulib module mathl for portability");
1366 _GL_FUNCDECL_SYS (tanf, float, (float x));
1368 _GL_CXXALIAS_SYS (tanf, float, (float x));
1369 _GL_CXXALIASWARN (tanf);
1370 #elif defined GNULIB_POSIXCHECK
1372 # if HAVE_RAW_DECL_TANF
1373 _GL_WARN_ON_USE (tanf, "tanf is unportable - "
1374 "use gnulib module tanf for portability");
1379 # if !@HAVE_TANL@ || !@HAVE_DECL_TANL@
1381 _GL_FUNCDECL_SYS (tanl, long double, (long double x));
1383 _GL_CXXALIAS_SYS (tanl, long double, (long double x));
1384 _GL_CXXALIASWARN (tanl);
1385 #elif defined GNULIB_POSIXCHECK
1387 # if HAVE_RAW_DECL_TANL
1388 _GL_WARN_ON_USE (tanl, "tanl is unportable - "
1389 "use gnulib module mathl for portability");
1397 _GL_FUNCDECL_SYS (tanhf, float, (float x));
1399 _GL_CXXALIAS_SYS (tanhf, float, (float x));
1400 _GL_CXXALIASWARN (tanhf);
1401 #elif defined GNULIB_POSIXCHECK
1403 # if HAVE_RAW_DECL_TANHF
1404 _GL_WARN_ON_USE (tanhf, "tanhf is unportable - "
1405 "use gnulib module tanhf for portability");
1411 # if @REPLACE_TRUNCF@
1412 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
1413 # define truncf rpl_truncf
1415 _GL_FUNCDECL_RPL (truncf, float, (float x));
1416 _GL_CXXALIAS_RPL (truncf, float, (float x));
1418 # if !@HAVE_DECL_TRUNCF@
1419 _GL_FUNCDECL_SYS (truncf, float, (float x));
1421 _GL_CXXALIAS_SYS (truncf, float, (float x));
1423 _GL_CXXALIASWARN (truncf);
1424 #elif defined GNULIB_POSIXCHECK
1426 # if HAVE_RAW_DECL_TRUNCF
1427 _GL_WARN_ON_USE (truncf, "truncf is unportable - "
1428 "use gnulib module truncf for portability");
1433 # if @REPLACE_TRUNC@
1434 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
1435 # define trunc rpl_trunc
1437 _GL_FUNCDECL_RPL (trunc, double, (double x));
1438 _GL_CXXALIAS_RPL (trunc, double, (double x));
1440 # if !@HAVE_DECL_TRUNC@
1441 _GL_FUNCDECL_SYS (trunc, double, (double x));
1443 _GL_CXXALIAS_SYS (trunc, double, (double x));
1445 _GL_CXXALIASWARN (trunc);
1446 #elif defined GNULIB_POSIXCHECK
1448 # if HAVE_RAW_DECL_TRUNC
1449 _GL_WARN_ON_USE (trunc, "trunc is unportable - "
1450 "use gnulib module trunc for portability");
1455 # if @REPLACE_TRUNCL@
1456 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
1458 # define truncl rpl_truncl
1460 _GL_FUNCDECL_RPL (truncl, long double, (long double x));
1461 _GL_CXXALIAS_RPL (truncl, long double, (long double x));
1463 # if !@HAVE_DECL_TRUNCL@
1464 _GL_FUNCDECL_SYS (truncl, long double, (long double x));
1466 _GL_CXXALIAS_SYS (truncl, long double, (long double x));
1468 _GL_CXXALIASWARN (truncl);
1469 #elif defined GNULIB_POSIXCHECK
1471 # if HAVE_RAW_DECL_TRUNCL
1472 _GL_WARN_ON_USE (truncl, "truncl is unportable - "
1473 "use gnulib module truncl for portability");
1478 /* Definitions of function-like macros come here, after the function
1482 #if @GNULIB_ISFINITE@
1483 # if @REPLACE_ISFINITE@
1484 _GL_EXTERN_C int gl_isfinitef (float x);
1485 _GL_EXTERN_C int gl_isfinited (double x);
1486 _GL_EXTERN_C int gl_isfinitel (long double x);
1488 # define isfinite(x) \
1489 (sizeof (x) == sizeof (long double) ? gl_isfinitel (x) : \
1490 sizeof (x) == sizeof (double) ? gl_isfinited (x) : \
1495 _GL_MATH_CXX_REAL_FLOATING_DECL_1 (isfinite)
1497 _GL_MATH_CXX_REAL_FLOATING_DECL_2 (isfinite)
1500 #elif defined GNULIB_POSIXCHECK
1501 # if defined isfinite
1502 _GL_WARN_REAL_FLOATING_DECL (isfinite);
1504 # define isfinite(x) _GL_WARN_REAL_FLOATING_IMPL (isfinite, x)
1510 # if @REPLACE_ISINF@
1511 _GL_EXTERN_C int gl_isinff (float x);
1512 _GL_EXTERN_C int gl_isinfd (double x);
1513 _GL_EXTERN_C int gl_isinfl (long double x);
1516 (sizeof (x) == sizeof (long double) ? gl_isinfl (x) : \
1517 sizeof (x) == sizeof (double) ? gl_isinfd (x) : \
1522 _GL_MATH_CXX_REAL_FLOATING_DECL_1 (isinf)
1524 _GL_MATH_CXX_REAL_FLOATING_DECL_2 (isinf)
1527 #elif defined GNULIB_POSIXCHECK
1529 _GL_WARN_REAL_FLOATING_DECL (isinf);
1531 # define isinf(x) _GL_WARN_REAL_FLOATING_IMPL (isinf, x)
1537 /* Test for NaN for 'float' numbers. */
1539 /* The original <math.h> included above provides a declaration of isnan macro
1540 or (older) isnanf function. */
1542 /* GCC 4.0 and newer provides three built-ins for isnan. */
1544 # define isnanf(x) __builtin_isnanf ((float)(x))
1545 # elif defined isnan
1547 # define isnanf(x) isnan ((float)(x))
1550 /* Test whether X is a NaN. */
1552 # define isnanf rpl_isnanf
1553 _GL_EXTERN_C int isnanf (float x);
1558 /* Test for NaN for 'double' numbers.
1559 This function is a gnulib extension, unlike isnan() which applied only
1560 to 'double' numbers earlier but now is a type-generic macro. */
1562 /* The original <math.h> included above provides a declaration of isnan
1565 /* GCC 4.0 and newer provides three built-ins for isnan. */
1567 # define isnand(x) __builtin_isnan ((double)(x))
1570 # define isnand(x) isnan ((double)(x))
1573 /* Test whether X is a NaN. */
1575 # define isnand rpl_isnand
1576 _GL_EXTERN_C int isnand (double x);
1581 /* Test for NaN for 'long double' numbers. */
1583 /* The original <math.h> included above provides a declaration of isnan
1584 macro or (older) isnanl function. */
1586 /* GCC 4.0 and newer provides three built-ins for isnan. */
1588 # define isnanl(x) __builtin_isnanl ((long double)(x))
1589 # elif defined isnan
1591 # define isnanl(x) isnan ((long double)(x))
1594 /* Test whether X is a NaN. */
1596 # define isnanl rpl_isnanl
1597 _GL_EXTERN_C int isnanl (long double x) _GL_ATTRIBUTE_CONST;
1601 /* This must come *after* the snippets for GNULIB_ISNANF and GNULIB_ISNANL! */
1603 # if @REPLACE_ISNAN@
1604 /* We can't just use the isnanf macro (e.g.) as exposed by
1605 isnanf.h (e.g.) here, because those may end up being macros
1606 that recursively expand back to isnan. So use the gnulib
1607 replacements for them directly. */
1608 # if @HAVE_ISNANF@ && __GNUC__ >= 4
1609 # define gl_isnan_f(x) __builtin_isnanf ((float)(x))
1611 _GL_EXTERN_C int rpl_isnanf (float x);
1612 # define gl_isnan_f(x) rpl_isnanf (x)
1614 # if @HAVE_ISNAND@ && __GNUC__ >= 4
1615 # define gl_isnan_d(x) __builtin_isnan ((double)(x))
1617 _GL_EXTERN_C int rpl_isnand (double x);
1618 # define gl_isnan_d(x) rpl_isnand (x)
1620 # if @HAVE_ISNANL@ && __GNUC__ >= 4
1621 # define gl_isnan_l(x) __builtin_isnanl ((long double)(x))
1623 _GL_EXTERN_C int rpl_isnanl (long double x) _GL_ATTRIBUTE_CONST;
1624 # define gl_isnan_l(x) rpl_isnanl (x)
1628 (sizeof (x) == sizeof (long double) ? gl_isnan_l (x) : \
1629 sizeof (x) == sizeof (double) ? gl_isnan_d (x) : \
1631 # elif __GNUC__ >= 4
1634 (sizeof (x) == sizeof (long double) ? __builtin_isnanl ((long double)(x)) : \
1635 sizeof (x) == sizeof (double) ? __builtin_isnan ((double)(x)) : \
1636 __builtin_isnanf ((float)(x)))
1640 _GL_MATH_CXX_REAL_FLOATING_DECL_1 (isnan)
1642 _GL_MATH_CXX_REAL_FLOATING_DECL_2 (isnan)
1645 /* Ensure isnan is a macro. */
1647 # define isnan isnan
1650 #elif defined GNULIB_POSIXCHECK
1652 _GL_WARN_REAL_FLOATING_DECL (isnan);
1654 # define isnan(x) _GL_WARN_REAL_FLOATING_IMPL (isnan, x)
1659 #if @GNULIB_SIGNBIT@
1660 # if @REPLACE_SIGNBIT_USING_GCC@
1662 /* GCC 4.0 and newer provides three built-ins for signbit. */
1663 # define signbit(x) \
1664 (sizeof (x) == sizeof (long double) ? __builtin_signbitl (x) : \
1665 sizeof (x) == sizeof (double) ? __builtin_signbit (x) : \
1666 __builtin_signbitf (x))
1668 # if @REPLACE_SIGNBIT@
1670 _GL_EXTERN_C int gl_signbitf (float arg);
1671 _GL_EXTERN_C int gl_signbitd (double arg);
1672 _GL_EXTERN_C int gl_signbitl (long double arg);
1673 # if __GNUC__ >= 2 && !defined __STRICT_ANSI__
1674 # define _GL_NUM_UINT_WORDS(type) \
1675 ((sizeof (type) + sizeof (unsigned int) - 1) / sizeof (unsigned int))
1676 # if defined FLT_SIGNBIT_WORD && defined FLT_SIGNBIT_BIT && !defined gl_signbitf
1677 # define gl_signbitf_OPTIMIZED_MACRO
1678 # define gl_signbitf(arg) \
1679 ({ union { float _value; \
1680 unsigned int _word[_GL_NUM_UINT_WORDS (float)]; \
1682 _m._value = (arg); \
1683 (_m._word[FLT_SIGNBIT_WORD] >> FLT_SIGNBIT_BIT) & 1; \
1686 # if defined DBL_SIGNBIT_WORD && defined DBL_SIGNBIT_BIT && !defined gl_signbitd
1687 # define gl_signbitd_OPTIMIZED_MACRO
1688 # define gl_signbitd(arg) \
1689 ({ union { double _value; \
1690 unsigned int _word[_GL_NUM_UINT_WORDS (double)]; \
1692 _m._value = (arg); \
1693 (_m._word[DBL_SIGNBIT_WORD] >> DBL_SIGNBIT_BIT) & 1; \
1696 # if defined LDBL_SIGNBIT_WORD && defined LDBL_SIGNBIT_BIT && !defined gl_signbitl
1697 # define gl_signbitl_OPTIMIZED_MACRO
1698 # define gl_signbitl(arg) \
1699 ({ union { long double _value; \
1700 unsigned int _word[_GL_NUM_UINT_WORDS (long double)]; \
1702 _m._value = (arg); \
1703 (_m._word[LDBL_SIGNBIT_WORD] >> LDBL_SIGNBIT_BIT) & 1; \
1707 # define signbit(x) \
1708 (sizeof (x) == sizeof (long double) ? gl_signbitl (x) : \
1709 sizeof (x) == sizeof (double) ? gl_signbitd (x) : \
1714 _GL_MATH_CXX_REAL_FLOATING_DECL_1 (signbit)
1716 _GL_MATH_CXX_REAL_FLOATING_DECL_2 (signbit)
1719 #elif defined GNULIB_POSIXCHECK
1720 # if defined signbit
1721 _GL_WARN_REAL_FLOATING_DECL (signbit);
1723 # define signbit(x) _GL_WARN_REAL_FLOATING_IMPL (signbit, x)
1728 #endif /* _@GUARD_PREFIX@_MATH_H */
1729 #endif /* _@GUARD_PREFIX@_MATH_H */