（cmath）关于头文件cmath
关于头文件cmath
// -*- C++ -*- C forwarding header.
// Copyright (C) 1997-2014 Free Software Foundation, Inc.
//
// This file is part of the GNU ISO C++ Library. This library is free
// software; you can redistribute it and/or modify it under the
// terms of the GNU General Public License as published by the
// Free Software Foundation; either version 3, or (at your option)
// any later version.
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// Under Section 7 of GPL version 3, you are granted additional
// permissions described in the GCC Runtime Library Exception, version
// 3.1, as published by the Free Software Foundation.
// You should have received a copy of the GNU General Public License and
// a copy of the GCC Runtime Library Exception along with this program;
// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
// <http://www.gnu.org/licenses/>.
/** @file include/cmath
* This is a Standard C++ Library file. You should @c \#include this file
* in your programs, rather than any of the @a *.h implementation files.
*
* This is the C++ version of the Standard C Library header @c math.h,
* and its contents are (mostly) the same as that header, but are all
* contained in the namespace @c std (except for names which are defined
* as macros in C).
*/
//
// ISO C++ 14882: 26.5 C library
//
#pragma GCC system_header
#include <bits/c++config.h>
#include <bits/cpp_type_traits.h>
#include <ext/type_traits.h>
#include <math.h>
#ifndef _GLIBCXX_CMATH
#define _GLIBCXX_CMATH 1
// Get rid of those macros defined in <math.h> in lieu of real functions.
#undef abs
#undef div
#undef acos
#undef asin
#undef atan
#undef atan2
#undef ceil
#undef cos
#undef cosh
#undef exp
#undef fabs
#undef floor
#undef fmod
#undef frexp
#undef ldexp
#undef log
#undef log10
#undef modf
#undef pow
#undef sin
#undef sinh
#undef sqrt
#undef tan
#undef tanh
namespace std _GLIBCXX_VISIBILITY(default) {
_GLIBCXX_BEGIN_NAMESPACE_VERSION
#ifndef __CORRECT_ISO_CPP_MATH_H_PROTO
inline _GLIBCXX_CONSTEXPR double
abs(double __x) {
return __builtin_fabs(__x);
}
#endif
#ifndef __CORRECT_ISO_CPP_MATH_H_PROTO
inline _GLIBCXX_CONSTEXPR float
abs(float __x) {
return __builtin_fabsf(__x);
}
inline _GLIBCXX_CONSTEXPR long double
abs(long double __x) {
return __builtin_fabsl(__x);
}
#endif
template<typename _Tp>
inline _GLIBCXX_CONSTEXPR
typename __gnu_cxx::__enable_if<__is_integer<_Tp>::__value,
double>::__type
abs(_Tp __x) {
return __builtin_fabs(__x);
}
using ::acos;
#ifndef __CORRECT_ISO_CPP_MATH_H_PROTO
inline _GLIBCXX_CONSTEXPR float
acos(float __x) {
return __builtin_acosf(__x);
}
inline _GLIBCXX_CONSTEXPR long double
acos(long double __x) {
return __builtin_acosl(__x);
}
#endif
template<typename _Tp>
inline _GLIBCXX_CONSTEXPR
typename __gnu_cxx::__enable_if<__is_integer<_Tp>::__value,
double>::__type
acos(_Tp __x) {
return __builtin_acos(__x);
}
using ::asin;
#ifndef __CORRECT_ISO_CPP_MATH_H_PROTO
inline _GLIBCXX_CONSTEXPR float
asin(float __x) {
return __builtin_asinf(__x);
}
inline _GLIBCXX_CONSTEXPR long double
asin(long double __x) {
return __builtin_asinl(__x);
}
#endif
template<typename _Tp>
inline _GLIBCXX_CONSTEXPR
typename __gnu_cxx::__enable_if<__is_integer<_Tp>::__value,
double>::__type
asin(_Tp __x) {
return __builtin_asin(__x);
}
using ::atan;
#ifndef __CORRECT_ISO_CPP_MATH_H_PROTO
inline _GLIBCXX_CONSTEXPR float
atan(float __x) {
return __builtin_atanf(__x);
}
inline _GLIBCXX_CONSTEXPR long double
atan(long double __x) {
return __builtin_atanl(__x);
}
#endif
template<typename _Tp>
inline _GLIBCXX_CONSTEXPR
typename __gnu_cxx::__enable_if<__is_integer<_Tp>::__value,
double>::__type
atan(_Tp __x) {
return __builtin_atan(__x);
}
using ::atan2;
#ifndef __CORRECT_ISO_CPP_MATH_H_PROTO
inline _GLIBCXX_CONSTEXPR float
atan2(float __y, float __x) {
return __builtin_atan2f(__y, __x);
}
inline _GLIBCXX_CONSTEXPR long double
atan2(long double __y, long double __x) {
return __builtin_atan2l(__y, __x);
}
#endif
template<typename _Tp, typename _Up>
inline _GLIBCXX_CONSTEXPR
typename __gnu_cxx::__promote_2<_Tp, _Up>::__type
atan2(_Tp __y, _Up __x) {
typedef typename __gnu_cxx::__promote_2<_Tp, _Up>::__type __type;
return atan2(__type(__y), __type(__x));
}
using ::ceil;
#ifndef __CORRECT_ISO_CPP_MATH_H_PROTO
inline _GLIBCXX_CONSTEXPR float
ceil(float __x) {
return __builtin_ceilf(__x);
}
inline _GLIBCXX_CONSTEXPR long double
ceil(long double __x) {
return __builtin_ceill(__x);
}
#endif
template<typename _Tp>
inline _GLIBCXX_CONSTEXPR
typename __gnu_cxx::__enable_if<__is_integer<_Tp>::__value,
double>::__type
ceil(_Tp __x) {
return __builtin_ceil(__x);
}
using ::cos;
#ifndef __CORRECT_ISO_CPP_MATH_H_PROTO
inline _GLIBCXX_CONSTEXPR float
cos(float __x) {
return __builtin_cosf(__x);
}
inline _GLIBCXX_CONSTEXPR long double
cos(long double __x) {
return __builtin_cosl(__x);
}
#endif
template<typename _Tp>
inline _GLIBCXX_CONSTEXPR
typename __gnu_cxx::__enable_if<__is_integer<_Tp>::__value,
double>::__type
cos(_Tp __x) {
return __builtin_cos(__x);
}
using ::cosh;
#ifndef __CORRECT_ISO_CPP_MATH_H_PROTO
inline _GLIBCXX_CONSTEXPR float
cosh(float __x) {
return __builtin_coshf(__x);
}
inline _GLIBCXX_CONSTEXPR long double
cosh(long double __x) {
return __builtin_coshl(__x);
}
#endif
template<typename _Tp>
inline _GLIBCXX_CONSTEXPR
typename __gnu_cxx::__enable_if<__is_integer<_Tp>::__value,
double>::__type
cosh(_Tp __x) {
return __builtin_cosh(__x);
}
using ::exp;
#ifndef __CORRECT_ISO_CPP_MATH_H_PROTO
inline _GLIBCXX_CONSTEXPR float
exp(float __x) {
return __builtin_expf(__x);
}
inline _GLIBCXX_CONSTEXPR long double
exp(long double __x) {
return __builtin_expl(__x);
}
#endif
template<typename _Tp>
inline _GLIBCXX_CONSTEXPR
typename __gnu_cxx::__enable_if<__is_integer<_Tp>::__value,
double>::__type
exp(_Tp __x) {
return __builtin_exp(__x);
}
using ::fabs;
#ifndef __CORRECT_ISO_CPP_MATH_H_PROTO
inline _GLIBCXX_CONSTEXPR float
fabs(float __x) {
return __builtin_fabsf(__x);
}
inline _GLIBCXX_CONSTEXPR long double
fabs(long double __x) {
return __builtin_fabsl(__x);
}
#endif
template<typename _Tp>
inline _GLIBCXX_CONSTEXPR
typename __gnu_cxx::__enable_if<__is_integer<_Tp>::__value,
double>::__type
fabs(_Tp __x) {
return __builtin_fabs(__x);
}
using ::floor;
#ifndef __CORRECT_ISO_CPP_MATH_H_PROTO
inline _GLIBCXX_CONSTEXPR float
floor(float __x) {
return __builtin_floorf(__x);
}
inline _GLIBCXX_CONSTEXPR long double
floor(long double __x) {
return __builtin_floorl(__x);
}
#endif
template<typename _Tp>
inline _GLIBCXX_CONSTEXPR
typename __gnu_cxx::__enable_if<__is_integer<_Tp>::__value,
double>::__type
floor(_Tp __x) {
return __builtin_floor(__x);
}
using ::fmod;
#ifndef __CORRECT_ISO_CPP_MATH_H_PROTO
inline _GLIBCXX_CONSTEXPR float
fmod(float __x, float __y) {
return __builtin_fmodf(__x, __y);
}
inline _GLIBCXX_CONSTEXPR long double
fmod(long double __x, long double __y) {
return __builtin_fmodl(__x, __y);
}
#endif
template<typename _Tp, typename _Up>
inline _GLIBCXX_CONSTEXPR
typename __gnu_cxx::__promote_2<_Tp, _Up>::__type
fmod(_Tp __x, _Up __y) {
typedef typename __gnu_cxx::__promote_2<_Tp, _Up>::__type __type;
return fmod(__type(__x), __type(__y));
}
using ::frexp;
#ifndef __CORRECT_ISO_CPP_MATH_H_PROTO
inline float
frexp(float __x, int* __exp) {
return __builtin_frexpf(__x, __exp);
}
inline long double
frexp(long double __x, int* __exp) {
return __builtin_frexpl(__x, __exp);
}
#endif
template<typename _Tp>
inline _GLIBCXX_CONSTEXPR
typename __gnu_cxx::__enable_if<__is_integer<_Tp>::__value,
double>::__type
frexp(_Tp __x, int* __exp) {
return __builtin_frexp(__x, __exp);
}
using ::ldexp;
#ifndef __CORRECT_ISO_CPP_MATH_H_PROTO
inline _GLIBCXX_CONSTEXPR float
ldexp(float __x, int __exp) {
return __builtin_ldexpf(__x, __exp);
}
inline _GLIBCXX_CONSTEXPR long double
ldexp(long double __x, int __exp) {
return __builtin_ldexpl(__x, __exp);
}
#endif
template<typename _Tp>
inline _GLIBCXX_CONSTEXPR
typename __gnu_cxx::__enable_if<__is_integer<_Tp>::__value,
double>::__type
ldexp(_Tp __x, int __exp) {
return __builtin_ldexp(__x, __exp);
}
using ::log;
#ifndef __CORRECT_ISO_CPP_MATH_H_PROTO
inline _GLIBCXX_CONSTEXPR float
log(float __x) {
return __builtin_logf(__x);
}
inline _GLIBCXX_CONSTEXPR long double
log(long double __x) {
return __builtin_logl(__x);
}
#endif
template<typename _Tp>
inline _GLIBCXX_CONSTEXPR
typename __gnu_cxx::__enable_if<__is_integer<_Tp>::__value,
double>::__type
log(_Tp __x) {
return __builtin_log(__x);
}
using ::log10;
#ifndef __CORRECT_ISO_CPP_MATH_H_PROTO
inline _GLIBCXX_CONSTEXPR float
log10(float __x) {
return __builtin_log10f(__x);
}
inline _GLIBCXX_CONSTEXPR long double
log10(long double __x) {
return __builtin_log10l(__x);
}
#endif
template<typename _Tp>
inline _GLIBCXX_CONSTEXPR
typename __gnu_cxx::__enable_if<__is_integer<_Tp>::__value,
double>::__type
log10(_Tp __x) {
return __builtin_log10(__x);
}
using ::modf;
#ifndef __CORRECT_ISO_CPP_MATH_H_PROTO
inline float
modf(float __x, float* __iptr) {
return __builtin_modff(__x, __iptr);
}
inline long double
modf(long double __x, long double* __iptr) {
return __builtin_modfl(__x, __iptr);
}
#endif
using ::pow;
#ifndef __CORRECT_ISO_CPP_MATH_H_PROTO
inline _GLIBCXX_CONSTEXPR float
pow(float __x, float __y) {
return __builtin_powf(__x, __y);
}
inline _GLIBCXX_CONSTEXPR long double
pow(long double __x, long double __y) {
return __builtin_powl(__x, __y);
}
#if __cplusplus < 201103L
// _GLIBCXX_RESOLVE_LIB_DEFECTS
// DR 550. What should the return type of pow(float,int) be?
inline double
pow(double __x, int __i) {
return __builtin_powi(__x, __i);
}
inline float
pow(float __x, int __n) {
return __builtin_powif(__x, __n);
}
inline long double
pow(long double __x, int __n) {
return __builtin_powil(__x, __n);
}
#endif
#endif
template<typename _Tp, typename _Up>
inline _GLIBCXX_CONSTEXPR
typename __gnu_cxx::__promote_2<_Tp, _Up>::__type
pow(_Tp __x, _Up __y) {
typedef typename __gnu_cxx::__promote_2<_Tp, _Up>::__type __type;
return pow(__type(__x), __type(__y));
}
using ::sin;
#ifndef __CORRECT_ISO_CPP_MATH_H_PROTO
inline _GLIBCXX_CONSTEXPR float
sin(float __x) {
return __builtin_sinf(__x);
}
inline _GLIBCXX_CONSTEXPR long double
sin(long double __x) {
return __builtin_sinl(__x);
}
#endif
template<typename _Tp>
inline _GLIBCXX_CONSTEXPR
typename __gnu_cxx::__enable_if<__is_integer<_Tp>::__value,
double>::__type
sin(_Tp __x) {
return __builtin_sin(__x);
}
using ::sinh;
#ifndef __CORRECT_ISO_CPP_MATH_H_PROTO
inline _GLIBCXX_CONSTEXPR float
sinh(float __x) {
return __builtin_sinhf(__x);
}
inline _GLIBCXX_CONSTEXPR long double
sinh(long double __x) {
return __builtin_sinhl(__x);
}
#endif
template<typename _Tp>
inline _GLIBCXX_CONSTEXPR
typename __gnu_cxx::__enable_if<__is_integer<_Tp>::__value,
double>::__type
sinh(_Tp __x) {
return __builtin_sinh(__x);
}
using ::sqrt;
#ifndef __CORRECT_ISO_CPP_MATH_H_PROTO
inline _GLIBCXX_CONSTEXPR float
sqrt(float __x) {
return __builtin_sqrtf(__x);
}
inline _GLIBCXX_CONSTEXPR long double
sqrt(long double __x) {
return __builtin_sqrtl(__x);
}
#endif
template<typename _Tp>
inline _GLIBCXX_CONSTEXPR
typename __gnu_cxx::__enable_if<__is_integer<_Tp>::__value,
double>::__type
sqrt(_Tp __x) {
return __builtin_sqrt(__x);
}
using ::tan;
#ifndef __CORRECT_ISO_CPP_MATH_H_PROTO
inline _GLIBCXX_CONSTEXPR float
tan(float __x) {
return __builtin_tanf(__x);
}
inline _GLIBCXX_CONSTEXPR long double
tan(long double __x) {
return __builtin_tanl(__x);
}
#endif
template<typename _Tp>
inline _GLIBCXX_CONSTEXPR
typename __gnu_cxx::__enable_if<__is_integer<_Tp>::__value,
double>::__type
tan(_Tp __x) {
return __builtin_tan(__x);
}
using ::tanh;
#ifndef __CORRECT_ISO_CPP_MATH_H_PROTO
inline _GLIBCXX_CONSTEXPR float
tanh(float __x) {
return __builtin_tanhf(__x);
}
inline _GLIBCXX_CONSTEXPR long double
tanh(long double __x) {
return __builtin_tanhl(__x);
}
#endif
template<typename _Tp>
inline _GLIBCXX_CONSTEXPR
typename __gnu_cxx::__enable_if<__is_integer<_Tp>::__value,
double>::__type
tanh(_Tp __x) {
return __builtin_tanh(__x);
}
_GLIBCXX_END_NAMESPACE_VERSION
} // namespace
#if _GLIBCXX_USE_C99_MATH
#if !_GLIBCXX_USE_C99_FP_MACROS_DYNAMIC
// These are possible macros imported from C99-land.
#undef fpclassify
#undef isfinite
#undef isinf
#undef isnan
#undef isnormal
#undef signbit
#undef isgreater
#undef isgreaterequal
#undef isless
#undef islessequal
#undef islessgreater
#undef isunordered
namespace std _GLIBCXX_VISIBILITY(default) {
_GLIBCXX_BEGIN_NAMESPACE_VERSION
#if __cplusplus >= 201103L
constexpr int
fpclassify(float __x) {
return __builtin_fpclassify(FP_NAN, FP_INFINITE, FP_NORMAL,
FP_SUBNORMAL, FP_ZERO, __x);
}
constexpr int
fpclassify(double __x) {
return __builtin_fpclassify(FP_NAN, FP_INFINITE, FP_NORMAL,
FP_SUBNORMAL, FP_ZERO, __x);
}
constexpr int
fpclassify(long double __x) {
return __builtin_fpclassify(FP_NAN, FP_INFINITE, FP_NORMAL,
FP_SUBNORMAL, FP_ZERO, __x);
}
template<typename _Tp>
constexpr typename __gnu_cxx::__enable_if<__is_integer<_Tp>::__value,
int>::__type
fpclassify(_Tp __x) {
return __x != 0 ? FP_NORMAL : FP_ZERO;
}
constexpr bool
isfinite(float __x) {
return __builtin_isfinite(__x);
}
constexpr bool
isfinite(double __x) {
return __builtin_isfinite(__x);
}
constexpr bool
isfinite(long double __x) {
return __builtin_isfinite(__x);
}
template<typename _Tp>
constexpr typename __gnu_cxx::__enable_if<__is_integer<_Tp>::__value,
bool>::__type
isfinite(_Tp __x) {
return true;
}
constexpr bool
isinf(float __x) {
return __builtin_isinf(__x);
}
constexpr bool
isinf(double __x) {
return __builtin_isinf(__x);
}
constexpr bool
isinf(long double __x) {
return __builtin_isinf(__x);
}
template<typename _Tp>
constexpr typename __gnu_cxx::__enable_if<__is_integer<_Tp>::__value,
bool>::__type
isinf(_Tp __x) {
return false;
}
constexpr bool
isnan(float __x) {
return __builtin_isnan(__x);
}
constexpr bool
isnan(double __x) {
return __builtin_isnan(__x);
}
constexpr bool
isnan(long double __x) {
return __builtin_isnan(__x);
}
template<typename _Tp>
constexpr typename __gnu_cxx::__enable_if<__is_integer<_Tp>::__value,
bool>::__type
isnan(_Tp __x) {
return false;
}
constexpr bool
isnormal(float __x) {
return __builtin_isnormal(__x);
}
constexpr bool
isnormal(double __x) {
return __builtin_isnormal(__x);
}
constexpr bool
isnormal(long double __x) {
return __builtin_isnormal(__x);
}
template<typename _Tp>
constexpr typename __gnu_cxx::__enable_if<__is_integer<_Tp>::__value,
bool>::__type
isnormal(_Tp __x) {
return __x != 0 ? true : false;
}
// The front-end doesn't provide a type generic builtin (libstdc++/58625).
constexpr bool
signbit(float __x) {
return __builtin_signbitf(__x);
}
constexpr bool
signbit(double __x) {
return __builtin_signbit(__x);
}
constexpr bool
signbit(long double __x) {
return __builtin_signbitl(__x);
}
template<typename _Tp>
constexpr typename __gnu_cxx::__enable_if<__is_integer<_Tp>::__value,
bool>::__type
signbit(_Tp __x) {
return __x < 0 ? true : false;
}
constexpr bool
isgreater(float __x, float __y) {
return __builtin_isgreater(__x, __y);
}
constexpr bool
isgreater(double __x, double __y) {
return __builtin_isgreater(__x, __y);
}
constexpr bool
isgreater(long double __x, long double __y) {
return __builtin_isgreater(__x, __y);
}
template<typename _Tp, typename _Up>
constexpr typename
__gnu_cxx::__enable_if<(__is_arithmetic<_Tp>::__value
&& __is_arithmetic<_Up>::__value), bool>::__type
isgreater(_Tp __x, _Up __y) {
typedef typename __gnu_cxx::__promote_2<_Tp, _Up>::__type __type;
return __builtin_isgreater(__type(__x), __type(__y));
}
constexpr bool
isgreaterequal(float __x, float __y) {
return __builtin_isgreaterequal(__x, __y);
}
constexpr bool
isgreaterequal(double __x, double __y) {
return __builtin_isgreaterequal(__x, __y);
}
constexpr bool
isgreaterequal(long double __x, long double __y) {
return __builtin_isgreaterequal(__x, __y);
}
template<typename _Tp, typename _Up>
constexpr typename
__gnu_cxx::__enable_if<(__is_arithmetic<_Tp>::__value
&& __is_arithmetic<_Up>::__value), bool>::__type
isgreaterequal(_Tp __x, _Up __y) {
typedef typename __gnu_cxx::__promote_2<_Tp, _Up>::__type __type;
return __builtin_isgreaterequal(__type(__x), __type(__y));
}
constexpr bool
isless(float __x, float __y) {
return __builtin_isless(__x, __y);
}
constexpr bool
isless(double __x, double __y) {
return __builtin_isless(__x, __y);
}
constexpr bool
isless(long double __x, long double __y) {
return __builtin_isless(__x, __y);
}
template<typename _Tp, typename _Up>
constexpr typename
__gnu_cxx::__enable_if<(__is_arithmetic<_Tp>::__value
&& __is_arithmetic<_Up>::__value), bool>::__type
isless(_Tp __x, _Up __y) {
typedef typename __gnu_cxx::__promote_2<_Tp, _Up>::__type __type;
return __builtin_isless(__type(__x), __type(__y));
}
constexpr bool
islessequal(float __x, float __y) {
return __builtin_islessequal(__x, __y);
}
constexpr bool
islessequal(double __x, double __y) {
return __builtin_islessequal(__x, __y);
}
constexpr bool
islessequal(long double __x, long double __y) {
return __builtin_islessequal(__x, __y);
}
template<typename _Tp, typename _Up>
constexpr typename
__gnu_cxx::__enable_if<(__is_arithmetic<_Tp>::__value
&& __is_arithmetic<_Up>::__value), bool>::__type
islessequal(_Tp __x, _Up __y) {
typedef typename __gnu_cxx::__promote_2<_Tp, _Up>::__type __type;
return __builtin_islessequal(__type(__x), __type(__y));
}
constexpr bool
islessgreater(float __x, float __y) {
return __builtin_islessgreater(__x, __y);
}
constexpr bool
islessgreater(double __x, double __y) {
return __builtin_islessgreater(__x, __y);
}
constexpr bool
islessgreater(long double __x, long double __y) {
return __builtin_islessgreater(__x, __y);
}
template<typename _Tp, typename _Up>
constexpr typename
__gnu_cxx::__enable_if<(__is_arithmetic<_Tp>::__value
&& __is_arithmetic<_Up>::__value), bool>::__type
islessgreater(_Tp __x, _Up __y) {
typedef typename __gnu_cxx::__promote_2<_Tp, _Up>::__type __type;
return __builtin_islessgreater(__type(__x), __type(__y));
}
constexpr bool
isunordered(float __x, float __y) {
return __builtin_isunordered(__x, __y);
}
constexpr bool
isunordered(double __x, double __y) {
return __builtin_isunordered(__x, __y);
}
constexpr bool
isunordered(long double __x, long double __y) {
return __builtin_isunordered(__x, __y);
}
template<typename _Tp, typename _Up>
constexpr typename
__gnu_cxx::__enable_if<(__is_arithmetic<_Tp>::__value
&& __is_arithmetic<_Up>::__value), bool>::__type
isunordered(_Tp __x, _Up __y) {
typedef typename __gnu_cxx::__promote_2<_Tp, _Up>::__type __type;
return __builtin_isunordered(__type(__x), __type(__y));
}
#else
template<typename _Tp>
inline typename __gnu_cxx::__enable_if<__is_arithmetic<_Tp>::__value,
int>::__type
fpclassify(_Tp __f) {
typedef typename __gnu_cxx::__promote<_Tp>::__type __type;
return __builtin_fpclassify(FP_NAN, FP_INFINITE, FP_NORMAL,
FP_SUBNORMAL, FP_ZERO, __type(__f));
}
template<typename _Tp>
inline typename __gnu_cxx::__enable_if<__is_arithmetic<_Tp>::__value,
int>::__type
isfinite(_Tp __f) {
typedef typename __gnu_cxx::__promote<_Tp>::__type __type;
return __builtin_isfinite(__type(__f));
}
template<typename _Tp>
inline typename __gnu_cxx::__enable_if<__is_arithmetic<_Tp>::__value,
int>::__type
isinf(_Tp __f) {
typedef typename __gnu_cxx::__promote<_Tp>::__type __type;
return __builtin_isinf(__type(__f));
}
template<typename _Tp>
inline typename __gnu_cxx::__enable_if<__is_arithmetic<_Tp>::__value,
int>::__type
isnan(_Tp __f) {
typedef typename __gnu_cxx::__promote<_Tp>::__type __type;
return __builtin_isnan(__type(__f));
}
template<typename _Tp>
inline typename __gnu_cxx::__enable_if<__is_arithmetic<_Tp>::__value,
int>::__type
isnormal(_Tp __f) {
typedef typename __gnu_cxx::__promote<_Tp>::__type __type;
return __builtin_isnormal(__type(__f));
}
template<typename _Tp>
inline typename __gnu_cxx::__enable_if<__is_arithmetic<_Tp>::__value,
int>::__type
signbit(_Tp __f) {
typedef typename __gnu_cxx::__promote<_Tp>::__type __type;
return __builtin_signbit(__type(__f));
}
template<typename _Tp>
inline typename __gnu_cxx::__enable_if<__is_arithmetic<_Tp>::__value,
int>::__type
isgreater(_Tp __f1, _Tp __f2) {
typedef typename __gnu_cxx::__promote<_Tp>::__type __type;
return __builtin_isgreater(__type(__f1), __type(__f2));
}
template<typename _Tp>
inline typename __gnu_cxx::__enable_if<__is_arithmetic<_Tp>::__value,
int>::__type
isgreaterequal(_Tp __f1, _Tp __f2) {
typedef typename __gnu_cxx::__promote<_Tp>::__type __type;
return __builtin_isgreaterequal(__type(__f1), __type(__f2));
}
template<typename _Tp>
inline typename __gnu_cxx::__enable_if<__is_arithmetic<_Tp>::__value,
int>::__type
isless(_Tp __f1, _Tp __f2) {
typedef typename __gnu_cxx::__promote<_Tp>::__type __type;
return __builtin_isless(__type(__f1), __type(__f2));
}
template<typename _Tp>
inline typename __gnu_cxx::__enable_if<__is_arithmetic<_Tp>::__value,
int>::__type
islessequal(_Tp __f1, _Tp __f2) {
typedef typename __gnu_cxx::__promote<_Tp>::__type __type;
return __builtin_islessequal(__type(__f1), __type(__f2));
}
template<typename _Tp>
inline typename __gnu_cxx::__enable_if<__is_arithmetic<_Tp>::__value,
int>::__type
islessgreater(_Tp __f1, _Tp __f2) {
typedef typename __gnu_cxx::__promote<_Tp>::__type __type;
return __builtin_islessgreater(__type(__f1), __type(__f2));
}
template<typename _Tp>
inline typename __gnu_cxx::__enable_if<__is_arithmetic<_Tp>::__value,
int>::__type
isunordered(_Tp __f1, _Tp __f2) {
typedef typename __gnu_cxx::__promote<_Tp>::__type __type;
return __builtin_isunordered(__type(__f1), __type(__f2));
}
#endif
_GLIBCXX_END_NAMESPACE_VERSION
} // namespace
#endif /* _GLIBCXX_USE_C99_FP_MACROS_DYNAMIC */
#endif
#if __cplusplus >= 201103L
#ifdef _GLIBCXX_USE_C99_MATH_TR1
#undef acosh
#undef acoshf
#undef acoshl
#undef asinh
#undef asinhf
#undef asinhl
#undef atanh
#undef atanhf
#undef atanhl
#undef cbrt
#undef cbrtf
#undef cbrtl
#undef copysign
#undef copysignf
#undef copysignl
#undef erf
#undef erff
#undef erfl
#undef erfc
#undef erfcf
#undef erfcl
#undef exp2
#undef exp2f
#undef exp2l
#undef expm1
#undef expm1f
#undef expm1l
#undef fdim
#undef fdimf
#undef fdiml
#undef fma
#undef fmaf
#undef fmal
#undef fmax
#undef fmaxf
#undef fmaxl
#undef fmin
#undef fminf
#undef fminl
#undef hypot
#undef hypotf
#undef hypotl
#undef ilogb
#undef ilogbf
#undef ilogbl
#undef lgamma
#undef lgammaf
#undef lgammal
#undef llrint
#undef llrintf
#undef llrintl
#undef llround
#undef llroundf
#undef llroundl
#undef log1p
#undef log1pf
#undef log1pl
#undef log2
#undef log2f
#undef log2l
#undef logb
#undef logbf
#undef logbl
#undef lrint
#undef lrintf
#undef lrintl
#undef lround
#undef lroundf
#undef lroundl
#undef nan
#undef nanf
#undef nanl
#undef nearbyint
#undef nearbyintf
#undef nearbyintl
#undef nextafter
#undef nextafterf
#undef nextafterl
#undef nexttoward
#undef nexttowardf
#undef nexttowardl
#undef remainder
#undef remainderf
#undef remainderl
#undef remquo
#undef remquof
#undef remquol
#undef rint
#undef rintf
#undef rintl
#undef round
#undef roundf
#undef roundl
#undef scalbln
#undef scalblnf
#undef scalblnl
#undef scalbn
#undef scalbnf
#undef scalbnl
#undef tgamma
#undef tgammaf
#undef tgammal
#undef trunc
#undef truncf
#undef truncl
namespace std _GLIBCXX_VISIBILITY(default) {
_GLIBCXX_BEGIN_NAMESPACE_VERSION
// types
using ::double_t;
using ::float_t;
// functions
using ::acosh;
using ::acoshf;
using ::acoshl;
using ::asinh;
using ::asinhf;
using ::asinhl;
using ::atanh;
using ::atanhf;
using ::atanhl;
using ::cbrt;
using ::cbrtf;
using ::cbrtl;
using ::copysign;
using ::copysignf;
using ::copysignl;
using ::erf;
using ::erff;
using ::erfl;
using ::erfc;
using ::erfcf;
using ::erfcl;
using ::exp2;
using ::exp2f;
using ::exp2l;
using ::expm1;
using ::expm1f;
using ::expm1l;
using ::fdim;
using ::fdimf;
using ::fdiml;
using ::fma;
using ::fmaf;
using ::fmal;
using ::fmax;
using ::fmaxf;
using ::fmaxl;
using ::fmin;
using ::fminf;
using ::fminl;
using ::hypot;
using ::hypotf;
using ::hypotl;
using ::ilogb;
using ::ilogbf;
using ::ilogbl;
using ::lgamma;
using ::lgammaf;
using ::lgammal;
using ::llrint;
using ::llrintf;
using ::llrintl;
using ::llround;
using ::llroundf;
using ::llroundl;
using ::log1p;
using ::log1pf;
using ::log1pl;
using ::log2;
using ::log2f;
using ::log2l;
using ::logb;
using ::logbf;
using ::logbl;
using ::lrint;
using ::lrintf;
using ::lrintl;
using ::lround;
using ::lroundf;
using ::lroundl;
using ::nan;
using ::nanf;
using ::nanl;
using ::nearbyint;
using ::nearbyintf;
using ::nearbyintl;
using ::nextafter;
using ::nextafterf;
using ::nextafterl;
using ::nexttoward;
using ::nexttowardf;
using ::nexttowardl;
using ::remainder;
using ::remainderf;
using ::remainderl;
using ::remquo;
using ::remquof;
using ::remquol;
using ::rint;
using ::rintf;
using ::rintl;
using ::round;
using ::roundf;
using ::roundl;
using ::scalbln;
using ::scalblnf;
using ::scalblnl;
using ::scalbn;
using ::scalbnf;
using ::scalbnl;
using ::tgamma;
using ::tgammaf;
using ::tgammal;
using ::trunc;
using ::truncf;
using ::truncl;
/// Additional overloads.
constexpr float
acosh(float __x) {
return __builtin_acoshf(__x);
}
constexpr long double
acosh(long double __x) {
return __builtin_acoshl(__x);
}
template<typename _Tp>
constexpr typename __gnu_cxx::__enable_if<__is_integer<_Tp>::__value,
double>::__type
acosh(_Tp __x) {
return __builtin_acosh(__x);
}
constexpr float
asinh(float __x) {
return __builtin_asinhf(__x);
}
constexpr long double
asinh(long double __x) {
return __builtin_asinhl(__x);
}
template<typename _Tp>
constexpr typename __gnu_cxx::__enable_if<__is_integer<_Tp>::__value,
double>::__type
asinh(_Tp __x) {
return __builtin_asinh(__x);
}
constexpr float
atanh(float __x) {
return __builtin_atanhf(__x);
}
constexpr long double
atanh(long double __x) {
return __builtin_atanhl(__x);
}
template<typename _Tp>
constexpr typename __gnu_cxx::__enable_if<__is_integer<_Tp>::__value,
double>::__type
atanh(_Tp __x) {
return __builtin_atanh(__x);
}
constexpr float
cbrt(float __x) {
return __builtin_cbrtf(__x);
}
constexpr long double
cbrt(long double __x) {
return __builtin_cbrtl(__x);
}
template<typename _Tp>
constexpr typename __gnu_cxx::__enable_if<__is_integer<_Tp>::__value,
double>::__type
cbrt(_Tp __x) {
return __builtin_cbrt(__x);
}
constexpr float
copysign(float __x, float __y) {
return __builtin_copysignf(__x, __y);
}
constexpr long double
copysign(long double __x, long double __y) {
return __builtin_copysignl(__x, __y);
}
template<typename _Tp, typename _Up>
constexpr typename __gnu_cxx::__promote_2<_Tp, _Up>::__type
copysign(_Tp __x, _Up __y) {
typedef typename __gnu_cxx::__promote_2<_Tp, _Up>::__type __type;
return copysign(__type(__x), __type(__y));
}
constexpr float
erf(float __x) {
return __builtin_erff(__x);
}
constexpr long double
erf(long double __x) {
return __builtin_erfl(__x);
}
template<typename _Tp>
constexpr typename __gnu_cxx::__enable_if<__is_integer<_Tp>::__value,
double>::__type
erf(_Tp __x) {
return __builtin_erf(__x);
}
constexpr float
erfc(float __x) {
return __builtin_erfcf(__x);
}
constexpr long double
erfc(long double __x) {
return __builtin_erfcl(__x);
}
template<typename _Tp>
constexpr typename __gnu_cxx::__enable_if<__is_integer<_Tp>::__value,
double>::__type
erfc(_Tp __x) {
return __builtin_erfc(__x);
}
constexpr float
exp2(float __x) {
return __builtin_exp2f(__x);
}
constexpr long double
exp2(long double __x) {
return __builtin_exp2l(__x);
}
template<typename _Tp>
constexpr typename __gnu_cxx::__enable_if<__is_integer<_Tp>::__value,
double>::__type
exp2(_Tp __x) {
return __builtin_exp2(__x);
}
constexpr float
expm1(float __x) {
return __builtin_expm1f(__x);
}
constexpr long double
expm1(long double __x) {
return __builtin_expm1l(__x);
}
template<typename _Tp>
constexpr typename __gnu_cxx::__enable_if<__is_integer<_Tp>::__value,
double>::__type
expm1(_Tp __x) {
return __builtin_expm1(__x);
}
constexpr float
fdim(float __x, float __y) {
return __builtin_fdimf(__x, __y);
}
constexpr long double
fdim(long double __x, long double __y) {
return __builtin_fdiml(__x, __y);
}
template<typename _Tp, typename _Up>
constexpr typename __gnu_cxx::__promote_2<_Tp, _Up>::__type
fdim(_Tp __x, _Up __y) {
typedef typename __gnu_cxx::__promote_2<_Tp, _Up>::__type __type;
return fdim(__type(__x), __type(__y));
}
constexpr float
fma(float __x, float __y, float __z) {
return __builtin_fmaf(__x, __y, __z);
}
constexpr long double
fma(long double __x, long double __y, long double __z) {
return __builtin_fmal(__x, __y, __z);
}
template<typename _Tp, typename _Up, typename _Vp>
constexpr typename __gnu_cxx::__promote_3<_Tp, _Up, _Vp>::__type
fma(_Tp __x, _Up __y, _Vp __z) {
typedef typename __gnu_cxx::__promote_3<_Tp, _Up, _Vp>::__type __type;
return fma(__type(__x), __type(__y), __type(__z));
}
constexpr float
fmax(float __x, float __y) {
return __builtin_fmaxf(__x, __y);
}
constexpr long double
fmax(long double __x, long double __y) {
return __builtin_fmaxl(__x, __y);
}
template<typename _Tp, typename _Up>
constexpr typename __gnu_cxx::__promote_2<_Tp, _Up>::__type
fmax(_Tp __x, _Up __y) {
typedef typename __gnu_cxx::__promote_2<_Tp, _Up>::__type __type;
return fmax(__type(__x), __type(__y));
}
constexpr float
fmin(float __x, float __y) {
return __builtin_fminf(__x, __y);
}
constexpr long double
fmin(long double __x, long double __y) {
return __builtin_fminl(__x, __y);
}
template<typename _Tp, typename _Up>
constexpr typename __gnu_cxx::__promote_2<_Tp, _Up>::__type
fmin(_Tp __x, _Up __y) {
typedef typename __gnu_cxx::__promote_2<_Tp, _Up>::__type __type;
return fmin(__type(__x), __type(__y));
}
constexpr float
hypot(float __x, float __y) {
return __builtin_hypotf(__x, __y);
}
constexpr long double
hypot(long double __x, long double __y) {
return __builtin_hypotl(__x, __y);
}
template<typename _Tp, typename _Up>
constexpr typename __gnu_cxx::__promote_2<_Tp, _Up>::__type
hypot(_Tp __x, _Up __y) {
typedef typename __gnu_cxx::__promote_2<_Tp, _Up>::__type __type;
return hypot(__type(__x), __type(__y));
}
constexpr int
ilogb(float __x) {
return __builtin_ilogbf(__x);
}
constexpr int
ilogb(long double __x) {
return __builtin_ilogbl(__x);
}
template<typename _Tp>
constexpr
typename __gnu_cxx::__enable_if<__is_integer<_Tp>::__value,
int>::__type
ilogb(_Tp __x) {
return __builtin_ilogb(__x);
}
constexpr float
lgamma(float __x) {
return __builtin_lgammaf(__x);
}
constexpr long double
lgamma(long double __x) {
return __builtin_lgammal(__x);
}
template<typename _Tp>
constexpr typename __gnu_cxx::__enable_if<__is_integer<_Tp>::__value,
double>::__type
lgamma(_Tp __x) {
return __builtin_lgamma(__x);
}
constexpr long long
llrint(float __x) {
return __builtin_llrintf(__x);
}
constexpr long long
llrint(long double __x) {
return __builtin_llrintl(__x);
}
template<typename _Tp>
constexpr typename __gnu_cxx::__enable_if<__is_integer<_Tp>::__value,
long long>::__type
llrint(_Tp __x) {
return __builtin_llrint(__x);
}
constexpr long long
llround(float __x) {
return __builtin_llroundf(__x);
}
constexpr long long
llround(long double __x) {
return __builtin_llroundl(__x);
}
template<typename _Tp>
constexpr typename __gnu_cxx::__enable_if<__is_integer<_Tp>::__value,
long long>::__type
llround(_Tp __x) {
return __builtin_llround(__x);
}
constexpr float
log1p(float __x) {
return __builtin_log1pf(__x);
}
constexpr long double
log1p(long double __x) {
return __builtin_log1pl(__x);
}
template<typename _Tp>
constexpr typename __gnu_cxx::__enable_if<__is_integer<_Tp>::__value,
double>::__type
log1p(_Tp __x) {
return __builtin_log1p(__x);
}
// DR 568.
constexpr float
log2(float __x) {
return __builtin_log2f(__x);
}
constexpr long double
log2(long double __x) {
return __builtin_log2l(__x);
}
template<typename _Tp>
constexpr typename __gnu_cxx::__enable_if<__is_integer<_Tp>::__value,
double>::__type
log2(_Tp __x) {
return __builtin_log2(__x);
}
constexpr float
logb(float __x) {
return __builtin_logbf(__x);
}
constexpr long double
logb(long double __x) {
return __builtin_logbl(__x);
}
template<typename _Tp>
constexpr typename __gnu_cxx::__enable_if<__is_integer<_Tp>::__value,
double>::__type
logb(_Tp __x) {
return __builtin_logb(__x);
}
constexpr long
lrint(float __x) {
return __builtin_lrintf(__x);
}
constexpr long
lrint(long double __x) {
return __builtin_lrintl(__x);
}
template<typename _Tp>
constexpr typename __gnu_cxx::__enable_if<__is_integer<_Tp>::__value,
long>::__type
lrint(_Tp __x) {
return __builtin_lrint(__x);
}
constexpr long
lround(float __x) {
return __builtin_lroundf(__x);
}
constexpr long
lround(long double __x) {
return __builtin_lroundl(__x);
}
template<typename _Tp>
constexpr typename __gnu_cxx::__enable_if<__is_integer<_Tp>::__value,
long>::__type
lround(_Tp __x) {
return __builtin_lround(__x);
}
constexpr float
nearbyint(float __x) {
return __builtin_nearbyintf(__x);
}
constexpr long double
nearbyint(long double __x) {
return __builtin_nearbyintl(__x);
}
template<typename _Tp>
constexpr typename __gnu_cxx::__enable_if<__is_integer<_Tp>::__value,
double>::__type
nearbyint(_Tp __x) {
return __builtin_nearbyint(__x);
}
constexpr float
nextafter(float __x, float __y) {
return __builtin_nextafterf(__x, __y);
}
constexpr long double
nextafter(long double __x, long double __y) {
return __builtin_nextafterl(__x, __y);
}
template<typename _Tp, typename _Up>
constexpr typename __gnu_cxx::__promote_2<_Tp, _Up>::__type
nextafter(_Tp __x, _Up __y) {
typedef typename __gnu_cxx::__promote_2<_Tp, _Up>::__type __type;
return nextafter(__type(__x), __type(__y));
}
constexpr float
nexttoward(float __x, long double __y) {
return __builtin_nexttowardf(__x, __y);
}
constexpr long double
nexttoward(long double __x, long double __y) {
return __builtin_nexttowardl(__x, __y);
}
template<typename _Tp>
constexpr typename __gnu_cxx::__enable_if<__is_integer<_Tp>::__value,
double>::__type
nexttoward(_Tp __x, long double __y) {
return __builtin_nexttoward(__x, __y);
}
constexpr float
remainder(float __x, float __y) {
return __builtin_remainderf(__x, __y);
}
constexpr long double
remainder(long double __x, long double __y) {
return __builtin_remainderl(__x, __y);
}
template<typename _Tp, typename _Up>
constexpr typename __gnu_cxx::__promote_2<_Tp, _Up>::__type
remainder(_Tp __x, _Up __y) {
typedef typename __gnu_cxx::__promote_2<_Tp, _Up>::__type __type;
return remainder(__type(__x), __type(__y));
}
inline float
remquo(float __x, float __y, int* __pquo) {
return __builtin_remquof(__x, __y, __pquo);
}
inline long double
remquo(long double __x, long double __y, int* __pquo) {
return __builtin_remquol(__x, __y, __pquo);
}
template<typename _Tp, typename _Up>
inline typename __gnu_cxx::__promote_2<_Tp, _Up>::__type
remquo(_Tp __x, _Up __y, int* __pquo) {
typedef typename __gnu_cxx::__promote_2<_Tp, _Up>::__type __type;
return remquo(__type(__x), __type(__y), __pquo);
}
constexpr float
rint(float __x) {
return __builtin_rintf(__x);
}
constexpr long double
rint(long double __x) {
return __builtin_rintl(__x);
}
template<typename _Tp>
constexpr typename __gnu_cxx::__enable_if<__is_integer<_Tp>::__value,
double>::__type
rint(_Tp __x) {
return __builtin_rint(__x);
}
constexpr float
round(float __x) {
return __builtin_roundf(__x);
}
constexpr long double
round(long double __x) {
return __builtin_roundl(__x);
}
template<typename _Tp>
constexpr typename __gnu_cxx::__enable_if<__is_integer<_Tp>::__value,
double>::__type
round(_Tp __x) {
return __builtin_round(__x);
}
constexpr float
scalbln(float __x, long __ex) {
return __builtin_scalblnf(__x, __ex);
}
constexpr long double
scalbln(long double __x, long __ex) {
return __builtin_scalblnl(__x, __ex);
}
template<typename _Tp>
constexpr typename __gnu_cxx::__enable_if<__is_integer<_Tp>::__value,
double>::__type
scalbln(_Tp __x, long __ex) {
return __builtin_scalbln(__x, __ex);
}
constexpr float
scalbn(float __x, int __ex) {
return __builtin_scalbnf(__x, __ex);
}
constexpr long double
scalbn(long double __x, int __ex) {
return __builtin_scalbnl(__x, __ex);
}
template<typename _Tp>
constexpr typename __gnu_cxx::__enable_if<__is_integer<_Tp>::__value,
double>::__type
scalbn(_Tp __x, int __ex) {
return __builtin_scalbn(__x, __ex);
}
constexpr float
tgamma(float __x) {
return __builtin_tgammaf(__x);
}
constexpr long double
tgamma(long double __x) {
return __builtin_tgammal(__x);
}
template<typename _Tp>
constexpr typename __gnu_cxx::__enable_if<__is_integer<_Tp>::__value,
double>::__type
tgamma(_Tp __x) {
return __builtin_tgamma(__x);
}
constexpr float
trunc(float __x) {
return __builtin_truncf(__x);
}
constexpr long double
trunc(long double __x) {
return __builtin_truncl(__x);
}
template<typename _Tp>
constexpr typename __gnu_cxx::__enable_if<__is_integer<_Tp>::__value,
double>::__type
trunc(_Tp __x) {
return __builtin_trunc(__x);
}
_GLIBCXX_END_NAMESPACE_VERSION
} // namespace
#endif // _GLIBCXX_USE_C99_MATH_TR1
#endif // C++11
#endif