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");
292 # if !@HAVE_DECL_CBRTF@
293 _GL_FUNCDECL_SYS (cbrtf, float, (float x));
295 _GL_CXXALIAS_SYS (cbrtf, float, (float x));
296 _GL_CXXALIASWARN (cbrtf);
297 #elif defined GNULIB_POSIXCHECK
299 # if HAVE_RAW_DECL_CBRTF
300 _GL_WARN_ON_USE (cbrtf, "cbrtf is unportable - "
301 "use gnulib module cbrtf for portability");
307 _GL_FUNCDECL_SYS (cbrt, double, (double x));
309 _GL_CXXALIAS_SYS (cbrt, double, (double x));
310 _GL_CXXALIASWARN (cbrt);
311 #elif defined GNULIB_POSIXCHECK
313 # if HAVE_RAW_DECL_CBRT
314 _GL_WARN_ON_USE (cbrt, "cbrt is unportable - "
315 "use gnulib module cbrt for portability");
322 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
324 # define ceilf rpl_ceilf
326 _GL_FUNCDECL_RPL (ceilf, float, (float x));
327 _GL_CXXALIAS_RPL (ceilf, float, (float x));
329 # if !@HAVE_DECL_CEILF@
331 _GL_FUNCDECL_SYS (ceilf, float, (float x));
333 _GL_CXXALIAS_SYS (ceilf, float, (float x));
335 _GL_CXXALIASWARN (ceilf);
336 #elif defined GNULIB_POSIXCHECK
338 # if HAVE_RAW_DECL_CEILF
339 _GL_WARN_ON_USE (ceilf, "ceilf is unportable - "
340 "use gnulib module ceilf for portability");
346 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
347 # define ceil rpl_ceil
349 _GL_FUNCDECL_RPL (ceil, double, (double x));
350 _GL_CXXALIAS_RPL (ceil, double, (double x));
352 _GL_CXXALIAS_SYS (ceil, double, (double x));
354 _GL_CXXALIASWARN (ceil);
359 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
361 # define ceill rpl_ceill
363 _GL_FUNCDECL_RPL (ceill, long double, (long double x));
364 _GL_CXXALIAS_RPL (ceill, long double, (long double x));
366 # if !@HAVE_DECL_CEILL@
368 _GL_FUNCDECL_SYS (ceill, long double, (long double x));
370 _GL_CXXALIAS_SYS (ceill, long double, (long double x));
372 _GL_CXXALIASWARN (ceill);
373 #elif defined GNULIB_POSIXCHECK
375 # if HAVE_RAW_DECL_CEILL
376 _GL_WARN_ON_USE (ceill, "ceill is unportable - "
377 "use gnulib module ceill for portability");
382 #if @GNULIB_COPYSIGNF@
383 # if !@HAVE_COPYSIGNF@
384 _GL_FUNCDECL_SYS (copysignf, float, (float x, float y));
386 _GL_CXXALIAS_SYS (copysignf, float, (float x, float y));
387 _GL_CXXALIASWARN (copysignf);
388 #elif defined GNULIB_POSIXCHECK
390 # if HAVE_RAW_DECL_COPYSIGNF
391 _GL_WARN_ON_USE (copysignf, "copysignf is unportable - "
392 "use gnulib module copysignf for portability");
396 #if @GNULIB_COPYSIGN@
397 # if !@HAVE_COPYSIGN@
398 _GL_FUNCDECL_SYS (copysign, double, (double x, double y));
400 _GL_CXXALIAS_SYS (copysign, double, (double x, double y));
401 _GL_CXXALIASWARN (copysign);
402 #elif defined GNULIB_POSIXCHECK
404 # if HAVE_RAW_DECL_COPYSIGN
405 _GL_WARN_ON_USE (copysign, "copysign is unportable - "
406 "use gnulib module copysign for portability");
410 #if @GNULIB_COPYSIGNL@
411 # if !@HAVE_COPYSIGNL@
412 _GL_FUNCDECL_SYS (copysignl, long double, (long double x, long double y));
414 _GL_CXXALIAS_SYS (copysignl, long double, (long double x, long double y));
415 _GL_CXXALIASWARN (copysignl);
416 #elif defined GNULIB_POSIXCHECK
418 # if HAVE_RAW_DECL_COPYSIGNL
419 _GL_WARN_ON_USE (copysign, "copysignl is unportable - "
420 "use gnulib module copysignl for portability");
428 _GL_FUNCDECL_SYS (cosf, float, (float x));
430 _GL_CXXALIAS_SYS (cosf, float, (float x));
431 _GL_CXXALIASWARN (cosf);
432 #elif defined GNULIB_POSIXCHECK
434 # if HAVE_RAW_DECL_COSF
435 _GL_WARN_ON_USE (cosf, "cosf is unportable - "
436 "use gnulib module cosf for portability");
441 # if !@HAVE_COSL@ || !@HAVE_DECL_COSL@
443 _GL_FUNCDECL_SYS (cosl, long double, (long double x));
445 _GL_CXXALIAS_SYS (cosl, long double, (long double x));
446 _GL_CXXALIASWARN (cosl);
447 #elif defined GNULIB_POSIXCHECK
449 # if HAVE_RAW_DECL_COSL
450 _GL_WARN_ON_USE (cosl, "cosl is unportable - "
451 "use gnulib module mathl for portability");
459 _GL_FUNCDECL_SYS (coshf, float, (float x));
461 _GL_CXXALIAS_SYS (coshf, float, (float x));
462 _GL_CXXALIASWARN (coshf);
463 #elif defined GNULIB_POSIXCHECK
465 # if HAVE_RAW_DECL_COSHF
466 _GL_WARN_ON_USE (coshf, "coshf is unportable - "
467 "use gnulib module coshf for portability");
475 _GL_FUNCDECL_SYS (expf, float, (float x));
477 _GL_CXXALIAS_SYS (expf, float, (float x));
478 _GL_CXXALIASWARN (expf);
479 #elif defined GNULIB_POSIXCHECK
481 # if HAVE_RAW_DECL_EXPF
482 _GL_WARN_ON_USE (expf, "expf is unportable - "
483 "use gnulib module expf for portability");
488 # if !@HAVE_EXPL@ || !@HAVE_DECL_EXPL@
490 _GL_FUNCDECL_SYS (expl, long double, (long double x));
492 _GL_CXXALIAS_SYS (expl, long double, (long double x));
493 _GL_CXXALIASWARN (expl);
494 #elif defined GNULIB_POSIXCHECK
496 # if HAVE_RAW_DECL_EXPL
497 _GL_WARN_ON_USE (expl, "expl is unportable - "
498 "use gnulib module mathl for portability");
506 _GL_FUNCDECL_SYS (fabsf, float, (float x));
508 _GL_CXXALIAS_SYS (fabsf, float, (float x));
509 _GL_CXXALIASWARN (fabsf);
510 #elif defined GNULIB_POSIXCHECK
512 # if HAVE_RAW_DECL_FABSF
513 _GL_WARN_ON_USE (fabsf, "fabsf is unportable - "
514 "use gnulib module fabsf for portability");
520 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
522 # define fabsl rpl_fabsl
524 _GL_FUNCDECL_RPL (fabsl, long double, (long double x));
525 _GL_CXXALIAS_RPL (fabsl, long double, (long double x));
529 _GL_FUNCDECL_SYS (fabsl, long double, (long double x));
531 _GL_CXXALIAS_SYS (fabsl, long double, (long double x));
533 _GL_CXXALIASWARN (fabsl);
534 #elif defined GNULIB_POSIXCHECK
536 # if HAVE_RAW_DECL_FABSL
537 _GL_WARN_ON_USE (fabsl, "fabsl is unportable - "
538 "use gnulib module fabsl for portability");
544 # if @REPLACE_FLOORF@
545 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
547 # define floorf rpl_floorf
549 _GL_FUNCDECL_RPL (floorf, float, (float x));
550 _GL_CXXALIAS_RPL (floorf, float, (float x));
552 # if !@HAVE_DECL_FLOORF@
554 _GL_FUNCDECL_SYS (floorf, float, (float x));
556 _GL_CXXALIAS_SYS (floorf, float, (float x));
558 _GL_CXXALIASWARN (floorf);
559 #elif defined GNULIB_POSIXCHECK
561 # if HAVE_RAW_DECL_FLOORF
562 _GL_WARN_ON_USE (floorf, "floorf is unportable - "
563 "use gnulib module floorf for portability");
569 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
570 # define floor rpl_floor
572 _GL_FUNCDECL_RPL (floor, double, (double x));
573 _GL_CXXALIAS_RPL (floor, double, (double x));
575 _GL_CXXALIAS_SYS (floor, double, (double x));
577 _GL_CXXALIASWARN (floor);
581 # if @REPLACE_FLOORL@
582 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
584 # define floorl rpl_floorl
586 _GL_FUNCDECL_RPL (floorl, long double, (long double x));
587 _GL_CXXALIAS_RPL (floorl, long double, (long double x));
589 # if !@HAVE_DECL_FLOORL@
591 _GL_FUNCDECL_SYS (floorl, long double, (long double x));
593 _GL_CXXALIAS_SYS (floorl, long double, (long double x));
595 _GL_CXXALIASWARN (floorl);
596 #elif defined GNULIB_POSIXCHECK
598 # if HAVE_RAW_DECL_FLOORL
599 _GL_WARN_ON_USE (floorl, "floorl is unportable - "
600 "use gnulib module floorl for portability");
607 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
609 # define fmaf rpl_fmaf
611 _GL_FUNCDECL_RPL (fmaf, float, (float x, float y, float z));
612 _GL_CXXALIAS_RPL (fmaf, float, (float x, float y, float z));
615 _GL_FUNCDECL_SYS (fmaf, float, (float x, float y, float z));
617 _GL_CXXALIAS_SYS (fmaf, float, (float x, float y, float z));
619 _GL_CXXALIASWARN (fmaf);
620 #elif defined GNULIB_POSIXCHECK
622 # if HAVE_RAW_DECL_FMAF
623 _GL_WARN_ON_USE (fmaf, "fmaf is unportable - "
624 "use gnulib module fmaf for portability");
630 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
634 _GL_FUNCDECL_RPL (fma, double, (double x, double y, double z));
635 _GL_CXXALIAS_RPL (fma, double, (double x, double y, double z));
638 _GL_FUNCDECL_SYS (fma, double, (double x, double y, double z));
640 _GL_CXXALIAS_SYS (fma, double, (double x, double y, double z));
642 _GL_CXXALIASWARN (fma);
643 #elif defined GNULIB_POSIXCHECK
645 # if HAVE_RAW_DECL_FMA
646 _GL_WARN_ON_USE (fma, "fma is unportable - "
647 "use gnulib module fma for portability");
653 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
655 # define fmal rpl_fmal
657 _GL_FUNCDECL_RPL (fmal, long double,
658 (long double x, long double y, long double z));
659 _GL_CXXALIAS_RPL (fmal, long double,
660 (long double x, long double y, long double z));
663 _GL_FUNCDECL_SYS (fmal, long double,
664 (long double x, long double y, long double z));
666 _GL_CXXALIAS_SYS (fmal, long double,
667 (long double x, long double y, long double z));
669 _GL_CXXALIASWARN (fmal);
670 #elif defined GNULIB_POSIXCHECK
672 # if HAVE_RAW_DECL_FMAL
673 _GL_WARN_ON_USE (fmal, "fmal is unportable - "
674 "use gnulib module fmal for portability");
681 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
683 # define fmodf rpl_fmodf
685 _GL_FUNCDECL_RPL (fmodf, float, (float x, float y));
686 _GL_CXXALIAS_RPL (fmodf, float, (float x, float y));
690 _GL_FUNCDECL_SYS (fmodf, float, (float x, float y));
692 _GL_CXXALIAS_SYS (fmodf, float, (float x, float y));
694 _GL_CXXALIASWARN (fmodf);
695 #elif defined GNULIB_POSIXCHECK
697 # if HAVE_RAW_DECL_FMODF
698 _GL_WARN_ON_USE (fmodf, "fmodf is unportable - "
699 "use gnulib module fmodf for portability");
705 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
707 # define fmod rpl_fmod
709 _GL_FUNCDECL_RPL (fmod, double, (double x, double y));
710 _GL_CXXALIAS_RPL (fmod, double, (double x, double y));
712 _GL_CXXALIAS_SYS (fmod, double, (double x, double y));
714 _GL_CXXALIASWARN (fmod);
715 #elif defined GNULIB_POSIXCHECK
717 # if HAVE_RAW_DECL_FMOD
718 _GL_WARN_ON_USE (fmod, "fmod has portability problems - "
719 "use gnulib module fmod for portability");
725 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
727 # define fmodl rpl_fmodl
729 _GL_FUNCDECL_RPL (fmodl, long double, (long double x, long double y));
730 _GL_CXXALIAS_RPL (fmodl, long double, (long double x, long double y));
734 _GL_FUNCDECL_SYS (fmodl, long double, (long double x, long double y));
736 _GL_CXXALIAS_SYS (fmodl, long double, (long double x, long double y));
738 _GL_CXXALIASWARN (fmodl);
739 #elif defined GNULIB_POSIXCHECK
741 # if HAVE_RAW_DECL_FMODL
742 _GL_WARN_ON_USE (fmodl, "fmodl is unportable - "
743 "use gnulib module fmodl for portability");
751 If x finite and nonzero: 0.5 <= |mantissa| < 1.0.
752 If x is zero: mantissa = x, exp = 0.
753 If x is infinite or NaN: mantissa = x, exp unspecified.
754 Store exp in *EXPPTR and return mantissa. */
756 # if @REPLACE_FREXPF@
757 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
759 # define frexpf rpl_frexpf
761 _GL_FUNCDECL_RPL (frexpf, float, (float x, int *expptr) _GL_ARG_NONNULL ((2)));
762 _GL_CXXALIAS_RPL (frexpf, float, (float x, int *expptr));
766 _GL_FUNCDECL_SYS (frexpf, float, (float x, int *expptr) _GL_ARG_NONNULL ((2)));
768 _GL_CXXALIAS_SYS (frexpf, float, (float x, int *expptr));
770 _GL_CXXALIASWARN (frexpf);
771 #elif defined GNULIB_POSIXCHECK
773 # if HAVE_RAW_DECL_FREXPF
774 _GL_WARN_ON_USE (frexpf, "frexpf is unportable - "
775 "use gnulib module frexpf for portability");
782 If x finite and nonzero: 0.5 <= |mantissa| < 1.0.
783 If x is zero: mantissa = x, exp = 0.
784 If x is infinite or NaN: mantissa = x, exp unspecified.
785 Store exp in *EXPPTR and return mantissa. */
788 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
789 # define frexp rpl_frexp
791 _GL_FUNCDECL_RPL (frexp, double, (double x, int *expptr) _GL_ARG_NONNULL ((2)));
792 _GL_CXXALIAS_RPL (frexp, double, (double x, int *expptr));
794 _GL_CXXALIAS_SYS (frexp, double, (double x, int *expptr));
796 _GL_CXXALIASWARN (frexp);
797 #elif defined GNULIB_POSIXCHECK
799 /* Assume frexp is always declared. */
800 _GL_WARN_ON_USE (frexp, "frexp is unportable - "
801 "use gnulib module frexp for portability");
807 If x finite and nonzero: 0.5 <= |mantissa| < 1.0.
808 If x is zero: mantissa = x, exp = 0.
809 If x is infinite or NaN: mantissa = x, exp unspecified.
810 Store exp in *EXPPTR and return mantissa. */
811 #if @GNULIB_FREXPL@ && @REPLACE_FREXPL@
812 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
814 # define frexpl rpl_frexpl
816 _GL_FUNCDECL_RPL (frexpl, long double,
817 (long double x, int *expptr) _GL_ARG_NONNULL ((2)));
818 _GL_CXXALIAS_RPL (frexpl, long double, (long double x, int *expptr));
820 # if !@HAVE_DECL_FREXPL@
821 _GL_FUNCDECL_SYS (frexpl, long double,
822 (long double x, int *expptr) _GL_ARG_NONNULL ((2)));
825 _GL_CXXALIAS_SYS (frexpl, long double, (long double x, int *expptr));
828 #if @GNULIB_FREXPL@ && !(@REPLACE_FREXPL@ && !@HAVE_DECL_FREXPL@)
829 _GL_CXXALIASWARN (frexpl);
831 #if !@GNULIB_FREXPL@ && defined GNULIB_POSIXCHECK
833 # if HAVE_RAW_DECL_FREXPL
834 _GL_WARN_ON_USE (frexpl, "frexpl is unportable - "
835 "use gnulib module frexpl for portability");
840 /* Return sqrt(x^2+y^2). */
842 # if @REPLACE_HYPOTF@
843 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
845 # define hypotf rpl_hypotf
847 _GL_FUNCDECL_RPL (hypotf, float, (float x, float y));
848 _GL_CXXALIAS_RPL (hypotf, float, (float x, float y));
851 _GL_FUNCDECL_SYS (hypotf, float, (float x, float y));
853 _GL_CXXALIAS_SYS (hypotf, float, (float x, float y));
855 _GL_CXXALIASWARN (hypotf);
856 #elif defined GNULIB_POSIXCHECK
858 # if HAVE_RAW_DECL_HYPOTF
859 _GL_WARN_ON_USE (hypotf, "hypotf is unportable - "
860 "use gnulib module hypotf for portability");
864 /* Return sqrt(x^2+y^2). */
867 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
869 # define hypot rpl_hypot
871 _GL_FUNCDECL_RPL (hypot, double, (double x, double y));
872 _GL_CXXALIAS_RPL (hypot, double, (double x, double y));
874 _GL_CXXALIAS_SYS (hypot, double, (double x, double y));
876 _GL_CXXALIASWARN (hypot);
877 #elif defined GNULIB_POSIXCHECK
879 # if HAVE_RAW_DECL_HYPOT
880 _GL_WARN_ON_USE (hypotf, "hypot has portability problems - "
881 "use gnulib module hypot for portability");
885 /* Return sqrt(x^2+y^2). */
887 # if @REPLACE_HYPOTL@
888 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
890 # define hypotl rpl_hypotl
892 _GL_FUNCDECL_RPL (hypotl, long double, (long double x, long double y));
893 _GL_CXXALIAS_RPL (hypotl, long double, (long double x, long double y));
896 _GL_FUNCDECL_SYS (hypotl, long double, (long double x, long double y));
898 _GL_CXXALIAS_SYS (hypotl, long double, (long double x, long double y));
900 _GL_CXXALIASWARN (hypotl);
901 #elif defined GNULIB_POSIXCHECK
903 # if HAVE_RAW_DECL_HYPOTL
904 _GL_WARN_ON_USE (hypotl, "hypotl is unportable - "
905 "use gnulib module hypotl for portability");
910 /* Return x * 2^exp. */
914 _GL_FUNCDECL_SYS (ldexpf, float, (float x, int exp));
916 _GL_CXXALIAS_SYS (ldexpf, float, (float x, int exp));
917 _GL_CXXALIASWARN (ldexpf);
918 #elif defined GNULIB_POSIXCHECK
920 # if HAVE_RAW_DECL_LDEXPF
921 _GL_WARN_ON_USE (ldexpf, "ldexpf is unportable - "
922 "use gnulib module ldexpf for portability");
926 /* Return x * 2^exp. */
927 #if @GNULIB_LDEXPL@ && @REPLACE_LDEXPL@
928 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
930 # define ldexpl rpl_ldexpl
932 _GL_FUNCDECL_RPL (ldexpl, long double, (long double x, int exp));
933 _GL_CXXALIAS_RPL (ldexpl, long double, (long double x, int exp));
935 # if !@HAVE_DECL_LDEXPL@
936 _GL_FUNCDECL_SYS (ldexpl, long double, (long double x, int exp));
939 _GL_CXXALIAS_SYS (ldexpl, long double, (long double x, int exp));
943 _GL_CXXALIASWARN (ldexpl);
945 #if !@GNULIB_LDEXPL@ && defined GNULIB_POSIXCHECK
947 # if HAVE_RAW_DECL_LDEXPL
948 _GL_WARN_ON_USE (ldexpl, "ldexpl is unportable - "
949 "use gnulib module ldexpl for portability");
955 # if !@HAVE_DECL_LOGB@
956 _GL_EXTERN_C double logb (double x);
958 #elif defined GNULIB_POSIXCHECK
960 # if HAVE_RAW_DECL_LOGB
961 _GL_WARN_ON_USE (logb, "logb is unportable - "
962 "use gnulib module logb for portability");
970 _GL_FUNCDECL_SYS (logf, float, (float x));
972 _GL_CXXALIAS_SYS (logf, float, (float x));
973 _GL_CXXALIASWARN (logf);
974 #elif defined GNULIB_POSIXCHECK
976 # if HAVE_RAW_DECL_LOGF
977 _GL_WARN_ON_USE (logf, "logf is unportable - "
978 "use gnulib module logf for portability");
983 # if !@HAVE_LOGL@ || !@HAVE_DECL_LOGL@
985 _GL_FUNCDECL_SYS (logl, long double, (long double x));
987 _GL_CXXALIAS_SYS (logl, long double, (long double x));
988 _GL_CXXALIASWARN (logl);
989 #elif defined GNULIB_POSIXCHECK
991 # if HAVE_RAW_DECL_LOGL
992 _GL_WARN_ON_USE (logl, "logl is unportable - "
993 "use gnulib module mathl for portability");
1001 _GL_FUNCDECL_SYS (log10f, float, (float x));
1003 _GL_CXXALIAS_SYS (log10f, float, (float x));
1004 _GL_CXXALIASWARN (log10f);
1005 #elif defined GNULIB_POSIXCHECK
1007 # if HAVE_RAW_DECL_LOG10F
1008 _GL_WARN_ON_USE (log10f, "log10f is unportable - "
1009 "use gnulib module log10f for portability");
1014 # if !@HAVE_LOG10L@ || !@HAVE_DECL_LOG10L@
1016 _GL_FUNCDECL_SYS (log10l, long double, (long double x));
1018 _GL_CXXALIAS_SYS (log10l, long double, (long double x));
1019 _GL_CXXALIASWARN (log10l);
1020 #elif defined GNULIB_POSIXCHECK
1022 # if HAVE_RAW_DECL_LOG10L
1023 _GL_WARN_ON_USE (log10l, "log10l is unportable - "
1024 "use gnulib module log10l for portability");
1030 # if @REPLACE_MODFF@
1031 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
1033 # define modff rpl_modff
1035 _GL_FUNCDECL_RPL (modff, float, (float x, float *iptr) _GL_ARG_NONNULL ((2)));
1036 _GL_CXXALIAS_RPL (modff, float, (float x, float *iptr));
1040 _GL_FUNCDECL_SYS (modff, float, (float x, float *iptr) _GL_ARG_NONNULL ((2)));
1042 _GL_CXXALIAS_SYS (modff, float, (float x, float *iptr));
1044 _GL_CXXALIASWARN (modff);
1045 #elif defined GNULIB_POSIXCHECK
1047 # if HAVE_RAW_DECL_MODFF
1048 _GL_WARN_ON_USE (modff, "modff is unportable - "
1049 "use gnulib module modff for portability");
1055 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
1057 # define modf rpl_modf
1059 _GL_FUNCDECL_RPL (modf, double, (double x, double *iptr) _GL_ARG_NONNULL ((2)));
1060 _GL_CXXALIAS_RPL (modf, double, (double x, double *iptr));
1062 _GL_CXXALIAS_SYS (modf, double, (double x, double *iptr));
1064 _GL_CXXALIASWARN (modf);
1065 #elif defined GNULIB_POSIXCHECK
1067 # if HAVE_RAW_DECL_MODF
1068 _GL_WARN_ON_USE (modf, "modf has portability problems - "
1069 "use gnulib module modf for portability");
1074 # if @REPLACE_MODFL@
1075 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
1077 # define modfl rpl_modfl
1079 _GL_FUNCDECL_RPL (modfl, long double, (long double x, long double *iptr)
1080 _GL_ARG_NONNULL ((2)));
1081 _GL_CXXALIAS_RPL (modfl, long double, (long double x, long double *iptr));
1085 _GL_FUNCDECL_SYS (modfl, long double, (long double x, long double *iptr)
1086 _GL_ARG_NONNULL ((2)));
1088 _GL_CXXALIAS_SYS (modfl, long double, (long double x, long double *iptr));
1090 _GL_CXXALIASWARN (modfl);
1091 #elif defined GNULIB_POSIXCHECK
1093 # if HAVE_RAW_DECL_MODFL
1094 _GL_WARN_ON_USE (modfl, "modfl is unportable - "
1095 "use gnulib module modfl for portability");
1103 _GL_FUNCDECL_SYS (powf, float, (float x, float y));
1105 _GL_CXXALIAS_SYS (powf, float, (float x, float y));
1106 _GL_CXXALIASWARN (powf);
1107 #elif defined GNULIB_POSIXCHECK
1109 # if HAVE_RAW_DECL_POWF
1110 _GL_WARN_ON_USE (powf, "powf is unportable - "
1111 "use gnulib module powf for portability");
1116 #if @GNULIB_REMAINDERF@
1117 # if @REPLACE_REMAINDERF@
1118 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
1120 # define remainderf rpl_remainderf
1122 _GL_FUNCDECL_RPL (remainderf, float, (float x, float y));
1123 _GL_CXXALIAS_RPL (remainderf, float, (float x, float y));
1125 # if !@HAVE_REMAINDERF@
1126 _GL_FUNCDECL_SYS (remainderf, float, (float x, float y));
1128 _GL_CXXALIAS_SYS (remainderf, float, (float x, float y));
1130 _GL_CXXALIASWARN (remainderf);
1131 #elif defined GNULIB_POSIXCHECK
1133 # if HAVE_RAW_DECL_REMAINDERF
1134 _GL_WARN_ON_USE (remainderf, "remainderf is unportable - "
1135 "use gnulib module remainderf for portability");
1139 #if @GNULIB_REMAINDER@
1140 # if @REPLACE_REMAINDER@
1141 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
1143 # define remainder rpl_remainder
1145 _GL_FUNCDECL_RPL (remainder, double, (double x, double y));
1146 _GL_CXXALIAS_RPL (remainder, double, (double x, double y));
1148 # if !@HAVE_REMAINDER@ || !@HAVE_DECL_REMAINDER@
1149 _GL_FUNCDECL_SYS (remainder, double, (double x, double y));
1151 _GL_CXXALIAS_SYS (remainder, double, (double x, double y));
1153 _GL_CXXALIASWARN (remainder);
1154 #elif defined GNULIB_POSIXCHECK
1156 # if HAVE_RAW_DECL_REMAINDER
1157 _GL_WARN_ON_USE (remainder, "remainder is unportable - "
1158 "use gnulib module remainder for portability");
1162 #if @GNULIB_REMAINDERL@
1163 # if @REPLACE_REMAINDERL@
1164 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
1166 # define remainderl rpl_remainderl
1168 _GL_FUNCDECL_RPL (remainderl, long double, (long double x, long double y));
1169 _GL_CXXALIAS_RPL (remainderl, long double, (long double x, long double y));
1171 # if !@HAVE_REMAINDERL@
1172 _GL_FUNCDECL_SYS (remainderl, long double, (long double x, long double y));
1174 _GL_CXXALIAS_SYS (remainderl, long double, (long double x, long double y));
1176 _GL_CXXALIASWARN (remainderl);
1177 #elif defined GNULIB_POSIXCHECK
1179 # if HAVE_RAW_DECL_REMAINDERL
1180 _GL_WARN_ON_USE (remainderl, "remainderl is unportable - "
1181 "use gnulib module remainderl for portability");
1188 _GL_FUNCDECL_SYS (rintf, float, (float x));
1190 _GL_CXXALIAS_SYS (rintf, float, (float x));
1191 _GL_CXXALIASWARN (rintf);
1192 #elif defined GNULIB_POSIXCHECK
1194 # if HAVE_RAW_DECL_RINTF
1195 _GL_WARN_ON_USE (rintf, "rintf is unportable - "
1196 "use gnulib module rintf for portability");
1202 _GL_FUNCDECL_SYS (rint, double, (double x));
1204 _GL_CXXALIAS_SYS (rint, double, (double x));
1205 _GL_CXXALIASWARN (rint);
1206 #elif defined GNULIB_POSIXCHECK
1208 # if HAVE_RAW_DECL_RINT
1209 _GL_WARN_ON_USE (rint, "rint is unportable - "
1210 "use gnulib module rint for portability");
1216 _GL_FUNCDECL_SYS (rintl, long double, (long double x));
1218 _GL_CXXALIAS_SYS (rintl, long double, (long double x));
1219 _GL_CXXALIASWARN (rintl);
1220 #elif defined GNULIB_POSIXCHECK
1222 # if HAVE_RAW_DECL_RINTL
1223 _GL_WARN_ON_USE (rintl, "rintl is unportable - "
1224 "use gnulib module rintl for portability");
1230 # if @REPLACE_ROUNDF@
1231 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
1233 # define roundf rpl_roundf
1235 _GL_FUNCDECL_RPL (roundf, float, (float x));
1236 _GL_CXXALIAS_RPL (roundf, float, (float x));
1238 # if !@HAVE_DECL_ROUNDF@
1239 _GL_FUNCDECL_SYS (roundf, float, (float x));
1241 _GL_CXXALIAS_SYS (roundf, float, (float x));
1243 _GL_CXXALIASWARN (roundf);
1244 #elif defined GNULIB_POSIXCHECK
1246 # if HAVE_RAW_DECL_ROUNDF
1247 _GL_WARN_ON_USE (roundf, "roundf is unportable - "
1248 "use gnulib module roundf for portability");
1253 # if @REPLACE_ROUND@
1254 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
1256 # define round rpl_round
1258 _GL_FUNCDECL_RPL (round, double, (double x));
1259 _GL_CXXALIAS_RPL (round, double, (double x));
1261 # if !@HAVE_DECL_ROUND@
1262 _GL_FUNCDECL_SYS (round, double, (double x));
1264 _GL_CXXALIAS_SYS (round, double, (double x));
1266 _GL_CXXALIASWARN (round);
1267 #elif defined GNULIB_POSIXCHECK
1269 # if HAVE_RAW_DECL_ROUND
1270 _GL_WARN_ON_USE (round, "round is unportable - "
1271 "use gnulib module round for portability");
1276 # if @REPLACE_ROUNDL@
1277 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
1279 # define roundl rpl_roundl
1281 _GL_FUNCDECL_RPL (roundl, long double, (long double x));
1282 _GL_CXXALIAS_RPL (roundl, long double, (long double x));
1284 # if !@HAVE_DECL_ROUNDL@
1285 _GL_FUNCDECL_SYS (roundl, long double, (long double x));
1287 _GL_CXXALIAS_SYS (roundl, long double, (long double x));
1289 _GL_CXXALIASWARN (roundl);
1290 #elif defined GNULIB_POSIXCHECK
1292 # if HAVE_RAW_DECL_ROUNDL
1293 _GL_WARN_ON_USE (roundl, "roundl is unportable - "
1294 "use gnulib module roundl for portability");
1302 _GL_FUNCDECL_SYS (sinf, float, (float x));
1304 _GL_CXXALIAS_SYS (sinf, float, (float x));
1305 _GL_CXXALIASWARN (sinf);
1306 #elif defined GNULIB_POSIXCHECK
1308 # if HAVE_RAW_DECL_SINF
1309 _GL_WARN_ON_USE (sinf, "sinf is unportable - "
1310 "use gnulib module sinf for portability");
1315 # if !@HAVE_SINL@ || !@HAVE_DECL_SINL@
1317 _GL_FUNCDECL_SYS (sinl, long double, (long double x));
1319 _GL_CXXALIAS_SYS (sinl, long double, (long double x));
1320 _GL_CXXALIASWARN (sinl);
1321 #elif defined GNULIB_POSIXCHECK
1323 # if HAVE_RAW_DECL_SINL
1324 _GL_WARN_ON_USE (sinl, "sinl is unportable - "
1325 "use gnulib module mathl for portability");
1333 _GL_FUNCDECL_SYS (sinhf, float, (float x));
1335 _GL_CXXALIAS_SYS (sinhf, float, (float x));
1336 _GL_CXXALIASWARN (sinhf);
1337 #elif defined GNULIB_POSIXCHECK
1339 # if HAVE_RAW_DECL_SINHF
1340 _GL_WARN_ON_USE (sinhf, "sinhf is unportable - "
1341 "use gnulib module sinhf for portability");
1349 _GL_FUNCDECL_SYS (sqrtf, float, (float x));
1351 _GL_CXXALIAS_SYS (sqrtf, float, (float x));
1352 _GL_CXXALIASWARN (sqrtf);
1353 #elif defined GNULIB_POSIXCHECK
1355 # if HAVE_RAW_DECL_SQRTF
1356 _GL_WARN_ON_USE (sqrtf, "sqrtf is unportable - "
1357 "use gnulib module sqrtf for portability");
1362 # if !@HAVE_SQRTL@ || !@HAVE_DECL_SQRTL@
1364 _GL_FUNCDECL_SYS (sqrtl, long double, (long double x));
1366 _GL_CXXALIAS_SYS (sqrtl, long double, (long double x));
1367 _GL_CXXALIASWARN (sqrtl);
1368 #elif defined GNULIB_POSIXCHECK
1370 # if HAVE_RAW_DECL_SQRTL
1371 _GL_WARN_ON_USE (sqrtl, "sqrtl is unportable - "
1372 "use gnulib module mathl for portability");
1380 _GL_FUNCDECL_SYS (tanf, float, (float x));
1382 _GL_CXXALIAS_SYS (tanf, float, (float x));
1383 _GL_CXXALIASWARN (tanf);
1384 #elif defined GNULIB_POSIXCHECK
1386 # if HAVE_RAW_DECL_TANF
1387 _GL_WARN_ON_USE (tanf, "tanf is unportable - "
1388 "use gnulib module tanf for portability");
1393 # if !@HAVE_TANL@ || !@HAVE_DECL_TANL@
1395 _GL_FUNCDECL_SYS (tanl, long double, (long double x));
1397 _GL_CXXALIAS_SYS (tanl, long double, (long double x));
1398 _GL_CXXALIASWARN (tanl);
1399 #elif defined GNULIB_POSIXCHECK
1401 # if HAVE_RAW_DECL_TANL
1402 _GL_WARN_ON_USE (tanl, "tanl is unportable - "
1403 "use gnulib module mathl for portability");
1411 _GL_FUNCDECL_SYS (tanhf, float, (float x));
1413 _GL_CXXALIAS_SYS (tanhf, float, (float x));
1414 _GL_CXXALIASWARN (tanhf);
1415 #elif defined GNULIB_POSIXCHECK
1417 # if HAVE_RAW_DECL_TANHF
1418 _GL_WARN_ON_USE (tanhf, "tanhf is unportable - "
1419 "use gnulib module tanhf for portability");
1425 # if @REPLACE_TRUNCF@
1426 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
1427 # define truncf rpl_truncf
1429 _GL_FUNCDECL_RPL (truncf, float, (float x));
1430 _GL_CXXALIAS_RPL (truncf, float, (float x));
1432 # if !@HAVE_DECL_TRUNCF@
1433 _GL_FUNCDECL_SYS (truncf, float, (float x));
1435 _GL_CXXALIAS_SYS (truncf, float, (float x));
1437 _GL_CXXALIASWARN (truncf);
1438 #elif defined GNULIB_POSIXCHECK
1440 # if HAVE_RAW_DECL_TRUNCF
1441 _GL_WARN_ON_USE (truncf, "truncf is unportable - "
1442 "use gnulib module truncf for portability");
1447 # if @REPLACE_TRUNC@
1448 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
1449 # define trunc rpl_trunc
1451 _GL_FUNCDECL_RPL (trunc, double, (double x));
1452 _GL_CXXALIAS_RPL (trunc, double, (double x));
1454 # if !@HAVE_DECL_TRUNC@
1455 _GL_FUNCDECL_SYS (trunc, double, (double x));
1457 _GL_CXXALIAS_SYS (trunc, double, (double x));
1459 _GL_CXXALIASWARN (trunc);
1460 #elif defined GNULIB_POSIXCHECK
1462 # if HAVE_RAW_DECL_TRUNC
1463 _GL_WARN_ON_USE (trunc, "trunc is unportable - "
1464 "use gnulib module trunc for portability");
1469 # if @REPLACE_TRUNCL@
1470 # if !(defined __cplusplus && defined GNULIB_NAMESPACE)
1472 # define truncl rpl_truncl
1474 _GL_FUNCDECL_RPL (truncl, long double, (long double x));
1475 _GL_CXXALIAS_RPL (truncl, long double, (long double x));
1477 # if !@HAVE_DECL_TRUNCL@
1478 _GL_FUNCDECL_SYS (truncl, long double, (long double x));
1480 _GL_CXXALIAS_SYS (truncl, long double, (long double x));
1482 _GL_CXXALIASWARN (truncl);
1483 #elif defined GNULIB_POSIXCHECK
1485 # if HAVE_RAW_DECL_TRUNCL
1486 _GL_WARN_ON_USE (truncl, "truncl is unportable - "
1487 "use gnulib module truncl for portability");
1492 /* Definitions of function-like macros come here, after the function
1496 #if @GNULIB_ISFINITE@
1497 # if @REPLACE_ISFINITE@
1498 _GL_EXTERN_C int gl_isfinitef (float x);
1499 _GL_EXTERN_C int gl_isfinited (double x);
1500 _GL_EXTERN_C int gl_isfinitel (long double x);
1502 # define isfinite(x) \
1503 (sizeof (x) == sizeof (long double) ? gl_isfinitel (x) : \
1504 sizeof (x) == sizeof (double) ? gl_isfinited (x) : \
1509 _GL_MATH_CXX_REAL_FLOATING_DECL_1 (isfinite)
1511 _GL_MATH_CXX_REAL_FLOATING_DECL_2 (isfinite)
1514 #elif defined GNULIB_POSIXCHECK
1515 # if defined isfinite
1516 _GL_WARN_REAL_FLOATING_DECL (isfinite);
1518 # define isfinite(x) _GL_WARN_REAL_FLOATING_IMPL (isfinite, x)
1524 # if @REPLACE_ISINF@
1525 _GL_EXTERN_C int gl_isinff (float x);
1526 _GL_EXTERN_C int gl_isinfd (double x);
1527 _GL_EXTERN_C int gl_isinfl (long double x);
1530 (sizeof (x) == sizeof (long double) ? gl_isinfl (x) : \
1531 sizeof (x) == sizeof (double) ? gl_isinfd (x) : \
1536 _GL_MATH_CXX_REAL_FLOATING_DECL_1 (isinf)
1538 _GL_MATH_CXX_REAL_FLOATING_DECL_2 (isinf)
1541 #elif defined GNULIB_POSIXCHECK
1543 _GL_WARN_REAL_FLOATING_DECL (isinf);
1545 # define isinf(x) _GL_WARN_REAL_FLOATING_IMPL (isinf, x)
1551 /* Test for NaN for 'float' numbers. */
1553 /* The original <math.h> included above provides a declaration of isnan macro
1554 or (older) isnanf function. */
1556 /* GCC 4.0 and newer provides three built-ins for isnan. */
1558 # define isnanf(x) __builtin_isnanf ((float)(x))
1559 # elif defined isnan
1561 # define isnanf(x) isnan ((float)(x))
1564 /* Test whether X is a NaN. */
1566 # define isnanf rpl_isnanf
1567 _GL_EXTERN_C int isnanf (float x);
1572 /* Test for NaN for 'double' numbers.
1573 This function is a gnulib extension, unlike isnan() which applied only
1574 to 'double' numbers earlier but now is a type-generic macro. */
1576 /* The original <math.h> included above provides a declaration of isnan
1579 /* GCC 4.0 and newer provides three built-ins for isnan. */
1581 # define isnand(x) __builtin_isnan ((double)(x))
1584 # define isnand(x) isnan ((double)(x))
1587 /* Test whether X is a NaN. */
1589 # define isnand rpl_isnand
1590 _GL_EXTERN_C int isnand (double x);
1595 /* Test for NaN for 'long double' numbers. */
1597 /* The original <math.h> included above provides a declaration of isnan
1598 macro or (older) isnanl function. */
1600 /* GCC 4.0 and newer provides three built-ins for isnan. */
1602 # define isnanl(x) __builtin_isnanl ((long double)(x))
1603 # elif defined isnan
1605 # define isnanl(x) isnan ((long double)(x))
1608 /* Test whether X is a NaN. */
1610 # define isnanl rpl_isnanl
1611 _GL_EXTERN_C int isnanl (long double x) _GL_ATTRIBUTE_CONST;
1615 /* This must come *after* the snippets for GNULIB_ISNANF and GNULIB_ISNANL! */
1617 # if @REPLACE_ISNAN@
1618 /* We can't just use the isnanf macro (e.g.) as exposed by
1619 isnanf.h (e.g.) here, because those may end up being macros
1620 that recursively expand back to isnan. So use the gnulib
1621 replacements for them directly. */
1622 # if @HAVE_ISNANF@ && __GNUC__ >= 4
1623 # define gl_isnan_f(x) __builtin_isnanf ((float)(x))
1625 _GL_EXTERN_C int rpl_isnanf (float x);
1626 # define gl_isnan_f(x) rpl_isnanf (x)
1628 # if @HAVE_ISNAND@ && __GNUC__ >= 4
1629 # define gl_isnan_d(x) __builtin_isnan ((double)(x))
1631 _GL_EXTERN_C int rpl_isnand (double x);
1632 # define gl_isnan_d(x) rpl_isnand (x)
1634 # if @HAVE_ISNANL@ && __GNUC__ >= 4
1635 # define gl_isnan_l(x) __builtin_isnanl ((long double)(x))
1637 _GL_EXTERN_C int rpl_isnanl (long double x) _GL_ATTRIBUTE_CONST;
1638 # define gl_isnan_l(x) rpl_isnanl (x)
1642 (sizeof (x) == sizeof (long double) ? gl_isnan_l (x) : \
1643 sizeof (x) == sizeof (double) ? gl_isnan_d (x) : \
1645 # elif __GNUC__ >= 4
1648 (sizeof (x) == sizeof (long double) ? __builtin_isnanl ((long double)(x)) : \
1649 sizeof (x) == sizeof (double) ? __builtin_isnan ((double)(x)) : \
1650 __builtin_isnanf ((float)(x)))
1654 _GL_MATH_CXX_REAL_FLOATING_DECL_1 (isnan)
1656 _GL_MATH_CXX_REAL_FLOATING_DECL_2 (isnan)
1659 /* Ensure isnan is a macro. */
1661 # define isnan isnan
1664 #elif defined GNULIB_POSIXCHECK
1666 _GL_WARN_REAL_FLOATING_DECL (isnan);
1668 # define isnan(x) _GL_WARN_REAL_FLOATING_IMPL (isnan, x)
1673 #if @GNULIB_SIGNBIT@
1674 # if @REPLACE_SIGNBIT_USING_GCC@
1676 /* GCC 4.0 and newer provides three built-ins for signbit. */
1677 # define signbit(x) \
1678 (sizeof (x) == sizeof (long double) ? __builtin_signbitl (x) : \
1679 sizeof (x) == sizeof (double) ? __builtin_signbit (x) : \
1680 __builtin_signbitf (x))
1682 # if @REPLACE_SIGNBIT@
1684 _GL_EXTERN_C int gl_signbitf (float arg);
1685 _GL_EXTERN_C int gl_signbitd (double arg);
1686 _GL_EXTERN_C int gl_signbitl (long double arg);
1687 # if __GNUC__ >= 2 && !defined __STRICT_ANSI__
1688 # define _GL_NUM_UINT_WORDS(type) \
1689 ((sizeof (type) + sizeof (unsigned int) - 1) / sizeof (unsigned int))
1690 # if defined FLT_SIGNBIT_WORD && defined FLT_SIGNBIT_BIT && !defined gl_signbitf
1691 # define gl_signbitf_OPTIMIZED_MACRO
1692 # define gl_signbitf(arg) \
1693 ({ union { float _value; \
1694 unsigned int _word[_GL_NUM_UINT_WORDS (float)]; \
1696 _m._value = (arg); \
1697 (_m._word[FLT_SIGNBIT_WORD] >> FLT_SIGNBIT_BIT) & 1; \
1700 # if defined DBL_SIGNBIT_WORD && defined DBL_SIGNBIT_BIT && !defined gl_signbitd
1701 # define gl_signbitd_OPTIMIZED_MACRO
1702 # define gl_signbitd(arg) \
1703 ({ union { double _value; \
1704 unsigned int _word[_GL_NUM_UINT_WORDS (double)]; \
1706 _m._value = (arg); \
1707 (_m._word[DBL_SIGNBIT_WORD] >> DBL_SIGNBIT_BIT) & 1; \
1710 # if defined LDBL_SIGNBIT_WORD && defined LDBL_SIGNBIT_BIT && !defined gl_signbitl
1711 # define gl_signbitl_OPTIMIZED_MACRO
1712 # define gl_signbitl(arg) \
1713 ({ union { long double _value; \
1714 unsigned int _word[_GL_NUM_UINT_WORDS (long double)]; \
1716 _m._value = (arg); \
1717 (_m._word[LDBL_SIGNBIT_WORD] >> LDBL_SIGNBIT_BIT) & 1; \
1721 # define signbit(x) \
1722 (sizeof (x) == sizeof (long double) ? gl_signbitl (x) : \
1723 sizeof (x) == sizeof (double) ? gl_signbitd (x) : \
1728 _GL_MATH_CXX_REAL_FLOATING_DECL_1 (signbit)
1730 _GL_MATH_CXX_REAL_FLOATING_DECL_2 (signbit)
1733 #elif defined GNULIB_POSIXCHECK
1734 # if defined signbit
1735 _GL_WARN_REAL_FLOATING_DECL (signbit);
1737 # define signbit(x) _GL_WARN_REAL_FLOATING_IMPL (signbit, x)
1742 #endif /* _@GUARD_PREFIX@_MATH_H */
1743 #endif /* _@GUARD_PREFIX@_MATH_H */