1 // -*- C++ -*- C forwarding header.
3 // Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006
4 // Free Software Foundation, Inc.
6 // This file is part of the GNU ISO C++ Library. This library is free
7 // software; you can redistribute it and/or modify it under the
8 // terms of the GNU General Public License as published by the
9 // Free Software Foundation; either version 2, or (at your option)
12 // This library is distributed in the hope that it will be useful,
13 // but WITHOUT ANY WARRANTY; without even the implied warranty of
14 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 // GNU General Public License for more details.
17 // You should have received a copy of the GNU General Public License along
18 // with this library; see the file COPYING. If not, write to the Free
19 // Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
22 // As a special exception, you may use this file as part of a free software
23 // library without restriction. Specifically, if other files instantiate
24 // templates or use macros or inline functions from this file, or you compile
25 // this file and link it with other files to produce an executable, this
26 // file does not by itself cause the resulting executable to be covered by
27 // the GNU General Public License. This exception does not however
28 // invalidate any other reasons why the executable file might be covered by
29 // the GNU General Public License.
31 /** @file include/cmath
32 * This is a Standard C++ Library file. You should @c #include this file
33 * in your programs, rather than any of the "*.h" implementation files.
35 * This is the C++ version of the Standard C Library header @c math.h,
36 * and its contents are (mostly) the same as that header, but are all
37 * contained in the namespace @c std (except for names which are defined
42 // ISO C++ 14882: 26.5 C library
45 #ifndef _GLIBCXX_CMATH
46 #define _GLIBCXX_CMATH 1
48 #pragma GCC system_header
50 #include <bits/c++config.h>
51 #include <bits/cpp_type_traits.h>
52 #include <ext/type_traits.h>
56 // Get rid of those macros defined in <math.h> in lieu of real functions.
82 _GLIBCXX_BEGIN_NAMESPACE(std)
84 // Forward declaration of a helper function. This really should be
85 // an `exported' forward declaration.
86 template<typename _Tp> _Tp __cmath_power(_Tp, unsigned int);
90 { return __builtin_fabs(__x); }
94 { return __builtin_fabsf(__x); }
98 { return __builtin_fabsl(__x); }
104 { return __builtin_acosf(__x); }
107 acos(long double __x)
108 { return __builtin_acosl(__x); }
110 template<typename _Tp>
111 inline typename __gnu_cxx::__enable_if<__is_integer<_Tp>::__value,
114 { return __builtin_acos(__x); }
120 { return __builtin_asinf(__x); }
123 asin(long double __x)
124 { return __builtin_asinl(__x); }
126 template<typename _Tp>
127 inline typename __gnu_cxx::__enable_if<__is_integer<_Tp>::__value,
130 { return __builtin_asin(__x); }
136 { return __builtin_atanf(__x); }
139 atan(long double __x)
140 { return __builtin_atanl(__x); }
142 template<typename _Tp>
143 inline typename __gnu_cxx::__enable_if<__is_integer<_Tp>::__value,
146 { return __builtin_atan(__x); }
151 atan2(float __y, float __x)
152 { return __builtin_atan2f(__y, __x); }
155 atan2(long double __y, long double __x)
156 { return __builtin_atan2l(__y, __x); }
158 template<typename _Tp, typename _Up>
159 inline typename __gnu_cxx::__enable_if<__is_integer<_Tp>::__value
160 && __is_integer<_Up>::__value,
162 atan2(_Tp __y, _Up __x)
163 { return __builtin_atan2(__y, __x); }
169 { return __builtin_ceilf(__x); }
172 ceil(long double __x)
173 { return __builtin_ceill(__x); }
175 template<typename _Tp>
176 inline typename __gnu_cxx::__enable_if<__is_integer<_Tp>::__value,
179 { return __builtin_ceil(__x); }
185 { return __builtin_cosf(__x); }
189 { return __builtin_cosl(__x); }
191 template<typename _Tp>
192 inline typename __gnu_cxx::__enable_if<__is_integer<_Tp>::__value,
195 { return __builtin_cos(__x); }
201 { return __builtin_coshf(__x); }
204 cosh(long double __x)
205 { return __builtin_coshl(__x); }
207 template<typename _Tp>
208 inline typename __gnu_cxx::__enable_if<__is_integer<_Tp>::__value,
211 { return __builtin_cosh(__x); }
217 { return __builtin_expf(__x); }
221 { return __builtin_expl(__x); }
223 template<typename _Tp>
224 inline typename __gnu_cxx::__enable_if<__is_integer<_Tp>::__value,
227 { return __builtin_exp(__x); }
233 { return __builtin_fabsf(__x); }
236 fabs(long double __x)
237 { return __builtin_fabsl(__x); }
239 template<typename _Tp>
240 inline typename __gnu_cxx::__enable_if<__is_integer<_Tp>::__value,
243 { return __builtin_fabs(__x); }
249 { return __builtin_floorf(__x); }
252 floor(long double __x)
253 { return __builtin_floorl(__x); }
255 template<typename _Tp>
256 inline typename __gnu_cxx::__enable_if<__is_integer<_Tp>::__value,
259 { return __builtin_floor(__x); }
264 fmod(float __x, float __y)
265 { return __builtin_fmodf(__x, __y); }
268 fmod(long double __x, long double __y)
269 { return __builtin_fmodl(__x, __y); }
274 frexp(float __x, int* __exp)
275 { return __builtin_frexpf(__x, __exp); }
278 frexp(long double __x, int* __exp)
279 { return __builtin_frexpl(__x, __exp); }
281 template<typename _Tp>
282 inline typename __gnu_cxx::__enable_if<__is_integer<_Tp>::__value,
284 frexp(_Tp __x, int* __exp)
285 { return __builtin_frexp(__x, __exp); }
290 ldexp(float __x, int __exp)
291 { return __builtin_ldexpf(__x, __exp); }
294 ldexp(long double __x, int __exp)
295 { return __builtin_ldexpl(__x, __exp); }
297 template<typename _Tp>
298 inline typename __gnu_cxx::__enable_if<__is_integer<_Tp>::__value,
300 ldexp(_Tp __x, int __exp)
301 { return __builtin_ldexp(__x, __exp); }
307 { return __builtin_logf(__x); }
311 { return __builtin_logl(__x); }
313 template<typename _Tp>
314 inline typename __gnu_cxx::__enable_if<__is_integer<_Tp>::__value,
317 { return __builtin_log(__x); }
323 { return __builtin_log10f(__x); }
326 log10(long double __x)
327 { return __builtin_log10l(__x); }
329 template<typename _Tp>
330 inline typename __gnu_cxx::__enable_if<__is_integer<_Tp>::__value,
333 { return __builtin_log10(__x); }
338 modf(float __x, float* __iptr)
339 { return __builtin_modff(__x, __iptr); }
342 modf(long double __x, long double* __iptr)
343 { return __builtin_modfl(__x, __iptr); }
345 template<typename _Tp>
347 __pow_helper(_Tp __x, int __n)
350 ? _Tp(1)/__cmath_power(__x, -__n)
351 : __cmath_power(__x, __n);
357 pow(float __x, float __y)
358 { return __builtin_powf(__x, __y); }
361 pow(long double __x, long double __y)
362 { return __builtin_powl(__x, __y); }
365 pow(double __x, int __i)
366 { return __builtin_powi(__x, __i); }
369 pow(float __x, int __n)
370 { return __builtin_powif(__x, __n); }
373 pow(long double __x, int __n)
374 { return __builtin_powil(__x, __n); }
380 { return __builtin_sinf(__x); }
384 { return __builtin_sinl(__x); }
386 template<typename _Tp>
387 inline typename __gnu_cxx::__enable_if<__is_integer<_Tp>::__value,
390 { return __builtin_sin(__x); }
396 { return __builtin_sinhf(__x); }
399 sinh(long double __x)
400 { return __builtin_sinhl(__x); }
402 template<typename _Tp>
403 inline typename __gnu_cxx::__enable_if<__is_integer<_Tp>::__value,
406 { return __builtin_sinh(__x); }
412 { return __builtin_sqrtf(__x); }
415 sqrt(long double __x)
416 { return __builtin_sqrtl(__x); }
418 template<typename _Tp>
419 inline typename __gnu_cxx::__enable_if<__is_integer<_Tp>::__value,
422 { return __builtin_sqrt(__x); }
428 { return __builtin_tanf(__x); }
432 { return __builtin_tanl(__x); }
434 template<typename _Tp>
435 inline typename __gnu_cxx::__enable_if<__is_integer<_Tp>::__value,
438 { return __builtin_tan(__x); }
444 { return __builtin_tanhf(__x); }
447 tanh(long double __x)
448 { return __builtin_tanhl(__x); }
450 template<typename _Tp>
451 inline typename __gnu_cxx::__enable_if<__is_integer<_Tp>::__value,
454 { return __builtin_tanh(__x); }
456 _GLIBCXX_END_NAMESPACE
458 #if _GLIBCXX_USE_C99_MATH
459 #if !_GLIBCXX_USE_C99_FP_MACROS_DYNAMIC
460 // These are possible macros imported from C99-land. For strict
461 // conformance, remove possible C99-injected names from the global
462 // namespace, and sequester them in the __gnu_cxx extension namespace.
464 _GLIBCXX_BEGIN_NAMESPACE(__gnu_cxx)
466 template<typename _Tp>
468 __capture_fpclassify(_Tp __f) { return fpclassify(__f); }
470 template<typename _Tp>
472 __capture_isfinite(_Tp __f) { return isfinite(__f); }
474 template<typename _Tp>
476 __capture_isinf(_Tp __f) { return isinf(__f); }
478 template<typename _Tp>
480 __capture_isnan(_Tp __f) { return isnan(__f); }
482 template<typename _Tp>
484 __capture_isnormal(_Tp __f) { return isnormal(__f); }
486 template<typename _Tp>
488 __capture_signbit(_Tp __f) { return signbit(__f); }
490 template<typename _Tp>
492 __capture_isgreater(_Tp __f1, _Tp __f2)
493 { return isgreater(__f1, __f2); }
495 template<typename _Tp>
497 __capture_isgreaterequal(_Tp __f1, _Tp __f2)
498 { return isgreaterequal(__f1, __f2); }
500 template<typename _Tp>
502 __capture_isless(_Tp __f1, _Tp __f2) { return isless(__f1, __f2); }
504 template<typename _Tp>
506 __capture_islessequal(_Tp __f1, _Tp __f2)
507 { return islessequal(__f1, __f2); }
509 template<typename _Tp>
511 __capture_islessgreater(_Tp __f1, _Tp __f2)
512 { return islessgreater(__f1, __f2); }
514 template<typename _Tp>
516 __capture_isunordered(_Tp __f1, _Tp __f2)
517 { return isunordered(__f1, __f2); }
519 _GLIBCXX_END_NAMESPACE
521 // Only undefine the C99 FP macros, if actually captured for namespace movement
529 #undef isgreaterequal
535 _GLIBCXX_BEGIN_NAMESPACE(std)
537 template<typename _Tp>
539 fpclassify(_Tp __f) { return ::__gnu_cxx::__capture_fpclassify(__f); }
541 template<typename _Tp>
543 isfinite(_Tp __f) { return ::__gnu_cxx::__capture_isfinite(__f); }
545 template<typename _Tp>
547 isinf(_Tp __f) { return ::__gnu_cxx::__capture_isinf(__f); }
549 template<typename _Tp>
551 isnan(_Tp __f) { return ::__gnu_cxx::__capture_isnan(__f); }
553 template<typename _Tp>
555 isnormal(_Tp __f) { return ::__gnu_cxx::__capture_isnormal(__f); }
557 template<typename _Tp>
559 signbit(_Tp __f) { return ::__gnu_cxx::__capture_signbit(__f); }
561 template<typename _Tp>
563 isgreater(_Tp __f1, _Tp __f2)
564 { return ::__gnu_cxx::__capture_isgreater(__f1, __f2); }
566 template<typename _Tp>
568 isgreaterequal(_Tp __f1, _Tp __f2)
569 { return ::__gnu_cxx::__capture_isgreaterequal(__f1, __f2); }
571 template<typename _Tp>
573 isless(_Tp __f1, _Tp __f2)
574 { return ::__gnu_cxx::__capture_isless(__f1, __f2); }
576 template<typename _Tp>
578 islessequal(_Tp __f1, _Tp __f2)
579 { return ::__gnu_cxx::__capture_islessequal(__f1, __f2); }
581 template<typename _Tp>
583 islessgreater(_Tp __f1, _Tp __f2)
584 { return ::__gnu_cxx::__capture_islessgreater(__f1, __f2); }
586 template<typename _Tp>
588 isunordered(_Tp __f1, _Tp __f2)
589 { return ::__gnu_cxx::__capture_isunordered(__f1, __f2); }
591 _GLIBCXX_END_NAMESPACE
593 #endif /* _GLIBCXX_USE_C99_FP_MACROS_DYNAMIC */
596 #ifndef _GLIBCXX_EXPORT_TEMPLATE
597 # include <bits/cmath.tcc>