mirror of
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54fa741538
2000-06-06 Steven King <sxking@uswest.net>
* acconfig.h: Added defines for HAVE_BUILTIN math functs for float,
double and long double. Added defines for HAVE libm math functs for
float and long double.
* aclocal.m4: Added configure checks for builtin math funcs and libm
support for float and long double versions of the math functions.
* config.h.in: Added undefs for math functs.
* configure: Regenerate.
* math/mathconf: Changed the _GLIBCPP_HAS_BUILTIN_* to
_GLIBCPP_HAVE_BUILTIN_*.
* bits/std_cmath.h: Added long double support. Use builtins for
float, double and long if available, otherwise, use libm versions if
availible, otherwise, punt.
* shadow/bits/std_cmath.h: ditto
From-SVN: r34436
694 lines
18 KiB
C++
694 lines
18 KiB
C++
// -*- C++ -*- C math library.
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// Copyright (C) 1997, 1998, 1999, 2000 Free Software Foundation, Inc.
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//
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// This file is part of the GNU ISO C++ Library. This library is free
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// software; you can redistribute it and/or modify it under the
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// terms of the GNU General Public License as published by the
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// Free Software Foundation; either version 2, or (at your option)
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// any later version.
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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// You should have received a copy of the GNU General Public License along
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// with this library; see the file COPYING. If not, write to the Free
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// Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
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// USA.
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// As a special exception, you may use this file as part of a free software
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// library without restriction. Specifically, if other files instantiate
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// templates or use macros or inline functions from this file, or you compile
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// this file and link it with other files to produce an executable, this
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// file does not by itself cause the resulting executable to be covered by
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// the GNU General Public License. This exception does not however
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// invalidate any other reasons why the executable file might be covered by
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// the GNU General Public License.
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//
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// ISO C++ 14882: 26.5 C library
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//
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// Note: this is not a conforming implementation.
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#ifndef _CPP_CMATH
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#define _CPP_CMATH 1
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# pragma system_header
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# include_next <math.h>
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# include_next <stdlib.h>
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# include <bits/c++config.h>
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namespace std {
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//
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// float
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//
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#if _GLIBCPP_HAVE_BUILTIN_FABSF
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inline float abs(float __x)
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{ return __builtin_fabsf(__x); }
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#elif _GLIBCPP_HAVE_FABSF
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inline float abs(float __x)
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{ return ::fabsf(__x); }
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#else
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inline float abs(float __x)
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{ return ::fabs(static_cast<double>(__x)); }
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#endif
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#if _GLIBCPP_HAVE_BUILTIN_ACOSF
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inline float acos(float __x)
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{ return __builtin_acosf(__x); }
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#elif _GLIBCPP_HAVE_ACOSF
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inline float acos(float __x)
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{ return ::acosf(__x); }
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#else
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inline float acos(float __x)
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{ return ::acos(static_cast<double>(__x)); }
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#endif
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#if _GLIBCPP_HAVE_BUILTIN_ASINF
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inline float asin(float __x)
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{ return __builtin_asinf(__x); }
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#elif _GLIBCPP_HAVE_ASINF
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inline float asin(float __x)
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{ return ::asinf(__x); }
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#else
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inline float asin(float __x)
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{ return ::asin(static_cast<double>(__x)); }
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#endif
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#if _GLIBCPP_HAVE_BUILTIN_ATANF
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inline float atan(float __x)
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{ return __builtin_atanf(__x); }
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#elif _GLIBCPP_HAVE_ATANF
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inline float atan(float __x)
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{ return ::atanf(__x); }
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#else
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inline float atan(float __x)
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{ return ::atan(static_cast<double>(__x)); }
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#endif
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#if _GLIBCPP_HAVE_BUILTIN_ATAN2F
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inline float atan2(float __y, float __x)
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{ return __builtin_atan2f(__y, __x); }
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#elif _GLIBCPP_HAVE_ATAN2F
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inline float atan2(float __y, float __x)
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{ return ::atan2f(__y, __x); }
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#else
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inline float atan2(float __y, float __x)
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{ return ::atan2(static_cast<double>(__y), static_cast<double>(__x)); }
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#endif
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#if _GLIBCPP_HAVE_BUILTIN_CEILF
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inline float ceil(float __x)
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{ return __builtin_ceilf(__x); }
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#elif _GLIBCPP_HAVE_CEILF
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inline float ceil(float __x)
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{ return ::ceilf(__x); }
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#else
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inline float ceil(float __x)
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{ return ::ceil(static_cast<double>(__x)); }
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#endif
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#if _GLIBCPP_HAVE_BUILTIN_COSF
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inline float cos(float __x)
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{ return __builtin_cosf(__x); }
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#elif _GLIBCPP_HAVE_COSF
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inline float cos(float __x)
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{ return ::cosf(__x); }
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#else
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inline float cos(float __x)
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{ return ::cos(static_cast<double>(__x)); }
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#endif
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#if _GLIBCPP_HAVE_BUILTIN_COSHF
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inline float cosh(float __x)
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{ return __builtin_coshf(__x); }
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#elif _GLIBCPP_HAVE_COSHF
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inline float cosh(float __x)
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{ return ::coshf(__x); }
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#else
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inline float cosh(float __x)
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{ return ::cosh(static_cast<double>(__x)); }
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#endif
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#if _GLIBCPP_HAVE_BUILTIN_EXPF
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inline float exp(float __x)
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{ return __builtin_expf(__x); }
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#elif _GLIBCPP_HAVE_EXPF
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inline float exp(float __x)
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{ return ::expf(__x); }
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#else
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inline float exp(float __x)
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{ return ::exp(static_cast<double>(__x)); }
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#endif
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#if _GLIBCPP_HAVE_BUILTIN_FABSF
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inline float fabs(float __x)
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{ return __builtin_fabsf(__x); }
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#elif _GLIBCPP_HAVE_FABSF
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inline float fabs(float __x)
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{ return ::fabsf(__x); }
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#else
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inline float fabs(float __x)
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{ return ::fabs(static_cast<double>(__x)); }
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#endif
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#if _GLIBCPP_HAVE_BUILTIN_FLOORF
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inline float floor(float __x)
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{ return __builtin_floorf(__x); }
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#elif _GLIBCPP_HAVE_FLOORF
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inline float floor(float __x)
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{ return ::floorf(__x); }
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#else
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inline float floor(float __x)
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{ return ::floor(static_cast<double>(__x)); }
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#endif
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#if _GLIBCPP_HAVE_BUILTIN_FMODFF
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inline float fmod(float __x, float __y)
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{ return __builtin_fmodf(__x, __y); }
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#elif _GLIBCPP_HAVE_FMODFF
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inline float fmod(float __x, float __y)
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{ return ::fmodf(__x, __y); }
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#else
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inline float fmod(float __x, float __y)
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{ return ::fmod(static_cast<double>(__x), static_cast<double>(__y)); }
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#endif
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#if _GLIBCPP_HAVE_BUILTIN_FREXPF
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inline float frexp(float __x, int* __exp)
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{ return __builtin_frexpf(__x, __exp); }
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#elif _GLIBCPP_HAVE_FREXPF
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inline float frexp(float __x, int* __exp)
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{ return ::frexpf(__x, __exp); }
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#else
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inline float frexp(float __x, int* __exp)
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{ return ::frexp(__x, __exp); }
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#endif
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#if _GLIBCPP_HAVE_BUILTIN_LDEXPF
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inline float ldexp(float __x, int __exp)
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{ return __builtin_ldexpf(__x, __exp); }
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#elif _GLIBCPP_HAVE_LDEXPF
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inline float ldexp(float __x, int __exp)
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{ return ::ldexpf(__x, __exp); }
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#else
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inline float ldexp(float __x, int __exp)
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{ return ::ldexp(static_cast<double>(__x), __exp); }
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#endif
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#if _GLIBCPP_HAVE_BUILTIN_LOGF
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inline float log(float __x)
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{ return __builtin_logf(__x); }
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#elif _GLIBCPP_HAVE_LOGF
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inline float log(float __x)
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{ return ::logf(__x); }
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#else
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inline float log(float __x)
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{ return ::log(static_cast<double>(__x)); }
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#endif
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#if _GLIBCPP_HAVE_BUILTIN_LOG10F
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inline float log10(float __x)
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{ return __builtin_log10f(__x); }
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#elif _GLIBCPP_HAVE_LOG10F
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inline float log10(float __x)
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{ return ::log10f(__x); }
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#else
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inline float log10(float __x)
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{ return ::log10(static_cast<double>(__x)); }
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#endif
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#if _GLIBCPP_HAVE_BUILTIN_MODF
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inline float modf(float __x, float* __iptr)
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{ return __builtin_modff(__x, __iptr); }
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#elif _GLIBCPP_HAVE_MODF
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inline float modf(float __x, float* __iptr)
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{ return ::modff(__x, __iptr); }
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#else
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inline float modf(float __x, float* __iptr)
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{
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double __tmp;
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double __res = _C_legacy::modf(static_cast<double>(__x), &__tmp);
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*__iptr = static_cast<float> (__tmp);
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return __res;
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}
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#endif
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#if _GLIBCPP_HAVE_BUILTIN_POWF
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inline float pow(float __x, float __y)
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{ return __builtin_powf(__x, __y); }
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#elif _GLIBCPP_HAVE_POWF
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inline float pow(float __x, float __y)
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{ return ::powf(__x, __y); }
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#else
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inline float pow(float __x, float __y)
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{ return ::pow(static_cast<double>(__x), static_cast<double>(__y)); }
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#endif
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float pow (float, int);
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#if _GLIBCPP_HAVE_BUILTIN_SINF
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inline float sin(float __x)
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{ return __builtin_sinf(__x); }
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#elif _GLIBCPP_HAVE_SINF
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inline float sin(float __x)
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{ return ::sinf(__x); }
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#else
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inline float sin(float __x)
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{ return ::sin(static_cast<double>(__x)); }
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#endif
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#if _GLIBCPP_HAVE_BUILTIN_SINHF
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inline float sinh(float __x)
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{ return __builtin_sinhf(__x); }
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#elif _GLIBCPP_HAVE_SINHF
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inline float sinh(float __x)
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{ return ::sinhf(__x); }
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#else
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inline float sinh(float __x)
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{ return ::sinh(static_cast<double>(__x)); }
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#endif
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#if _GLIBCPP_HAVE_BUILTIN_SQRTF
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inline float sqrt(float __x)
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{ return __builtin_sqrtf(__x); }
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#elif _GLIBCPP_HAVE_SQRTF
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inline float sqrt(float __x)
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{ return ::sqrtf(__x); }
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#else
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inline float sqrt(float __x)
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{ return ::sqrt(static_cast<double>(__x)); }
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#endif
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#if _GLIBCPP_HAVE_BUILTIN_TANF
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inline float tan(float __x)
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{ return __builtin_tanf(__x); }
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#elif _GLIBCPP_HAVE_TANF
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inline float tan(float __x)
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{ return ::tanf(__x); }
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#else
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inline float tan(float __x)
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{ return ::tan(static_cast<double>(__x)); }
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#endif
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#if _GLIBCPP_HAVE_BUILTIN_TANHF
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inline float tanh(float __x)
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{ return __builtin_tanhf(__x); }
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#elif _GLIBCPP_HAVE_TANHF
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inline float tanh(float __x)
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{ return ::tanhf(__x); }
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#else
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inline float tanh(float __x)
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{ return ::tanh(static_cast<double>(__x)); }
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#endif
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//
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// double
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//
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#if _GLIBCPP_HAVE_BUILTIN_FABS
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inline double abs(double __x)
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{ return __builtin_fabs(__x); }
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#else
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inline double abs(double __x)
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{ return ::fabs(__x); }
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#endif
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#if _GLIBCPP_HAVE_BUILTIN_ACOS
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inline double acos(double __x)
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{ return __builtin_acos(__x); }
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#else
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inline double acos(double __x)
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{ return ::acos(__x); }
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#endif
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#if _GLIBCPP_HAVE_BUILTIN_ASIN
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inline double asin(double __x)
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{ return __builtin_asin(__x); }
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#else
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inline double asin(double __x)
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{ return ::asin(__x); }
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#endif
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#if _GLIBCPP_HAVE_BUILTIN_ATAN
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inline double atan(double __x)
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{ return __builtin_atan(__x); }
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#else
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inline double atan(double __x)
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{ return ::atan(__x); }
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#endif
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#if _GLIBCPP_HAVE_BUILTIN_ATAN2
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inline double atan2(double __y, double __x)
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{ return __builtin_atan2(__y, __x); }
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#else
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inline double atan2(double __y, double __x)
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{ return ::atan2(__y, __x); }
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#endif
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#if _GLIBCPP_HAVE_BUILTIN_CEIL
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inline double ceil(double __x)
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{ return __builtin_fceil(__x); }
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#else
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inline double ceil(double __x)
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{ return ::ceil(__x); }
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#endif
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#if _GLIBCPP_HAVE_BUILTIN_COS
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inline double cos(double __x)
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{ return __builtin_cos(__x); }
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#else
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inline double cos(double __x)
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{ return ::cos(__x); }
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#endif
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#if _GLIBCPP_HAVE_BUILTIN_COSH
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inline double cosh(double __x)
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{ return __builtin_cosh(__x); }
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#else
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inline double cosh(double __x)
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{ return ::cosh(__x); }
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#endif
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#if _GLIBCPP_HAVE_BUILTIN_EXP
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inline double exp(double __x)
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{ return __builtin_exp(__x); }
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#else
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inline double exp(double __x)
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{ return ::exp(__x); }
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#endif
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#if _GLIBCPP_HAVE_BUILTIN_FABS
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inline double fabs(double __x)
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{ return __builtin_fabs(__x); }
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#else
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inline double fabs(double __x)
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{ return ::fabs(__x); }
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#endif
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#if _GLIBCPP_HAVE_BUILTIN_FLOOR
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inline double floor(double __x)
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{ return __builtin_ffloor(__x); }
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#else
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inline double floor(double __x)
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{ return ::floor(__x); }
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#endif
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#if _GLIBCPP_HAVE_BUILTIN_FMOD
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inline double fmod(double __x, double __y)
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{ return __builtin_fmod(__x, __y); }
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#else
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inline double fmod(double __x, double __y)
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{ return ::fmod(__x, __y); }
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#endif
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#if _GLIBCPP_HAVE_BUILTIN_FREXP
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inline double frexp(double __x, int* __exp)
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{ return __builtin_frexp(__x, __exp); }
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#else
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inline double frexp(double __x, int* __exp)
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{ return ::frexp(__x, __exp); }
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#endif
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#if _GLIBCPP_HAVE_BUILTIN_LDEXP
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inline double ldexp(double __x, int __exp)
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{ return __builtin_ldexp(__x, __exp); }
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#else
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inline double ldexp(double __x, int __exp)
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{ return ::ldexp(__x, __exp); }
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#endif
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#if _GLIBCPP_HAVE_BUILTIN_LOG
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inline double log(double __x)
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{ return __builtin_log(__x); }
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#else
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inline double log(double __x)
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{ return ::log(__x); }
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#endif
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#if _GLIBCPP_HAVE_BUILTIN_LOG10
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inline double log10(double __x)
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{ return __builtin_log10(__x); }
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#else
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inline double log10(double __x)
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{ return ::log10(__x); }
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#endif
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#if _GLIBCPP_HAVE_BUILTIN_MODF
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inline double modf(double __x, double* __iptr)
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{ return __builtin_modf(__x, __iptr); }
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#else
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inline double modf(double __x, double* __iptr)
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{ return ::modf(__x, __iptr); }
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#endif
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#if _GLIBCPP_HAVE_BUILTIN_POW
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inline double pow(double __x, double __y)
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{ return __builtin_pow(__x, static_cast<double>(__y)); }
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#else
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inline double pow(double __x, double __y)
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{ return ::pow(__x, __y); }
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#endif
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double pow (double, int);
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#if _GLIBCPP_HAVE_BUILTIN_SIN
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inline double sin(double __x)
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{ return __builtin_sin(__x); }
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#else
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inline double sin(double __x)
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{ return ::sin(__x); }
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#endif
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#if _GLIBCPP_HAVE_BUILTIN_SINH
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inline double sinh(double __x)
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{ return __builtin_sinh(__x); }
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#else
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inline double sinh(double __x)
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{ return ::sinh(__x); }
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#endif
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#if _GLIBCPP_HAVE_BUILTIN_SQRT
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inline double sqrt(double __x)
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{ return __builtin_fsqrt(__x); }
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#else
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inline double sqrt(double __x)
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|
{ return ::sqrt(__x); }
|
|
#endif
|
|
|
|
#if _GLIBCPP_HAVE_BUILTIN_TAN
|
|
inline double tan(double __x)
|
|
{ return __builtin_tan(__x); }
|
|
#else
|
|
inline double tan(double __x)
|
|
{ return ::tan(__x); }
|
|
#endif
|
|
|
|
#if _GLIBCPP_HAVE_BUILTIN_TANH
|
|
inline double tanh(double __x)
|
|
{ return __builtin_tanh(__x); }
|
|
#else
|
|
inline double tanh(double __x)
|
|
{ return ::tanh(__x); }
|
|
#endif
|
|
|
|
//
|
|
// long double
|
|
//
|
|
#if _GLIBCPP_HAVE_BUILTIN_FABSL
|
|
inline long double abs(long double __x)
|
|
{ return __builtin_fabsl(__x); }
|
|
#elif _GLIBCPP_HAVE_FABSL
|
|
inline long double abs(long double __x)
|
|
{ return ::fabsl(__x); }
|
|
#endif
|
|
|
|
#if _GLIBCPP_HAVE_BUILTIN_ACOSL
|
|
inline long double acos(long double __x)
|
|
{ return __builtin_acosl(__x); }
|
|
#elif _GLIBCPP_HAVE_ACOSL
|
|
inline long double acos(long double __x)
|
|
{ return ::acosl(__x); }
|
|
#endif
|
|
|
|
#if _GLIBCPP_HAVE_BUILTIN_ASINL
|
|
inline long double asin(long double __x)
|
|
{ return __builtin_asinl(__x); }
|
|
#elif _GLIBCPP_HAVE_ASINL
|
|
inline long double asin(long double __x)
|
|
{ return ::asinl(__x); }
|
|
#endif
|
|
|
|
#if _GLIBCPP_HAVE_BUILTIN_ATANL
|
|
inline long double atan(long double __x)
|
|
{ return __builtin_atanl(__x); }
|
|
#elif _GLIBCPP_HAVE_ATANL
|
|
inline long double atan(long double __x)
|
|
{ return ::atanl(__x); }
|
|
#endif
|
|
|
|
#if _GLIBCPP_HAVE_BUILTIN_ATAN2L
|
|
inline long double atan2(long double __y, long double __x)
|
|
{ return __builtin_atan2l(__y, __x); }
|
|
#elif _GLIBCPP_HAVE_ATAN2L
|
|
inline long double atan2(long double __y, long double __x)
|
|
{ return ::atan2l(__y, __x); }
|
|
#endif
|
|
|
|
#if _GLIBCPP_HAVE_BUILTIN_CEILL
|
|
inline long double ceil(long double __x)
|
|
{ return __builtin_ceill(__x); }
|
|
#elif _GLIBCPP_HAVE_CEILL
|
|
inline long double ceil(long double __x)
|
|
{ return ::ceill(__x); }
|
|
#endif
|
|
|
|
#if _GLIBCPP_HAVE_BUILTIN_COSL
|
|
inline long double cos(long double __x)
|
|
{ return __builtin_cosl(__x); }
|
|
#elif _GLIBCPP_HAVE_COSL
|
|
inline long double cos(long double __x)
|
|
{ return ::cosl(__x); }
|
|
#endif
|
|
|
|
#if _GLIBCPP_HAVE_BUILTIN_COSHL
|
|
inline long double cosh(long double __x)
|
|
{ return __builtin_coshl(__x); }
|
|
#elif _GLIBCPP_HAVE_COSHL
|
|
inline long double cosh(long double __x)
|
|
{ return ::coshl(__x); }
|
|
#endif
|
|
|
|
#if _GLIBCPP_HAVE_BUILTIN_EXPL
|
|
inline long double exp(long double __x)
|
|
{ return __builtin_expl(__x); }
|
|
#elif _GLIBCPP_HAVE_EXPL
|
|
inline long double exp(long double __x)
|
|
{ return ::expl(__x); }
|
|
#endif
|
|
|
|
#if _GLIBCPP_HAVE_BUILTIN_FABSL
|
|
inline long double fabs(long double __x)
|
|
{ return __builtin_fabsl(__x); }
|
|
#elif _GLIBCPP_HAVE_FABSL
|
|
inline long double fabs(long double __x)
|
|
{ return ::fabsl(__x); }
|
|
#endif
|
|
|
|
#if _GLIBCPP_HAVE_BUILTIN_FLOORL
|
|
inline long double floor(long double __x)
|
|
{ return __builtin_floorl(__x); }
|
|
#elif _GLIBCPP_HAVE_FLOORL
|
|
inline long double floor(long double __x)
|
|
{ return ::floorl(__x); }
|
|
#endif
|
|
|
|
#if _GLIBCPP_HAVE_BUILTIN_FMODL
|
|
inline long double fmod(long double __x, long double __y)
|
|
{ return __builtin_fmodl(__x, __y); }
|
|
#elif _GLIBCPP_HAVE_FMODL
|
|
inline long double fmod(long double __x, long double __y)
|
|
{ return ::fmodl(__x, __y); }
|
|
#endif
|
|
|
|
#if _GLIBCPP_HAVE_BUILTIN_FREXPL
|
|
inline long double frexp(long double __x, int* __exp)
|
|
{ return __builtin_frexpl(__x, __exp); }
|
|
#elif _GLIBCPP_HAVE_FREXPL
|
|
inline long double frexp(long double __x, int* __exp)
|
|
{ return ::frexpl(__x, __exp); }
|
|
#endif
|
|
|
|
#if _GLIBCPP_HAVE_BUILTIN_LDEXPL
|
|
inline long double ldexp(long double __x, int __exp)
|
|
{ return __builtin_ldexpl(__x, __exp); }
|
|
#elif _GLIBCPP_HAVE_LDEXPL
|
|
inline long double ldexp(long double __x, int __exp)
|
|
{ return ::ldexpl(__x, __exp); }
|
|
#endif
|
|
|
|
#if _GLIBCPP_HAVE_BUILTIN_LOGL
|
|
inline long double log(long double __x)
|
|
{ return __builtin_logl(__x); }
|
|
#elif _GLIBCPP_HAVE_LOGL
|
|
inline long double log(long double __x)
|
|
{ return ::logl(__x); }
|
|
#endif
|
|
|
|
#if _GLIBCPP_HAVE_BUILTIN_LOG10L
|
|
inline long double log10(long double __x)
|
|
{ return __builtin_log10l(__x); }
|
|
#elif _GLIBCPP_HAVE_LOG10L
|
|
inline long double log10(long double __x)
|
|
{ return ::log10l(__x); }
|
|
#endif
|
|
|
|
#if _GLIBCPP_HAVE_BUILTIN_MODFL
|
|
inline long double mod(long double __x, long double* __iptr)
|
|
{ return __builtin_modfl(__x, __iptr); }
|
|
#elif _GLIBCPP_HAVE_MODFL
|
|
inline long double modf(long double __x, long double* __iptr)
|
|
{ return ::modfl(__x, __iptr); }
|
|
#endif
|
|
|
|
#if _GLIBCPP_HAVE_BUILTIN_POWL
|
|
inline long double pow(long double __x, long double __y)
|
|
{ return __builtin_powl(__x, __y); }
|
|
#elif _GLIBCPP_HAVE_POWL
|
|
inline long double pow(long double __x, long double __y)
|
|
{ return ::powl(__x, __y); }
|
|
#endif
|
|
|
|
long double pow(long double, int);
|
|
|
|
#if _GLIBCPP_HAVE_BUILTIN_SINL
|
|
inline long double sin(long double __x)
|
|
{ return __builtin_sinl(__x); }
|
|
#elif _GLIBCPP_HAVE_SINL
|
|
inline long double sin(long double __x)
|
|
{ return ::sinl(__x); }
|
|
#endif
|
|
|
|
#if _GLIBCPP_HAVE_BUILTIN_SINHL
|
|
inline long double sinh(long double __x)
|
|
{ return __builtin_sinhl(__x); }
|
|
#elif _GLIBCPP_HAVE_SINHL
|
|
inline long double sinh(long double __x)
|
|
{ return ::sinhl(__x); }
|
|
#endif
|
|
|
|
#if _GLIBCPP_HAVE_BUILTIN_SQRTL
|
|
inline long double sqrt(long double __x)
|
|
{ return __builtin_sqrtl(__x); }
|
|
#elif _GLIBCPP_HAVE_SQRTL
|
|
inline long double sqrt(long double __x)
|
|
{ return ::sqrtl(__x); }
|
|
#endif
|
|
|
|
#if _GLIBCPP_HAVE_BUILTIN_TANL
|
|
inline long double tan(long double __x)
|
|
{ return __builtin_tanl(__x); }
|
|
#elif _GLIBCPP_HAVE_TANL
|
|
inline long double tan(long double __x)
|
|
{ return ::tanl(__x); }
|
|
#endif
|
|
|
|
#if _GLIBCPP_HAVE_BUILTIN_TANHL
|
|
inline long double tanh(long double __x)
|
|
{ return __builtin_tanhl(__x); }
|
|
#elif _GLIBCPP_HAVE_TANHL
|
|
inline long double tanh(long double __x)
|
|
{ return ::tanhl(__x); }
|
|
#endif
|
|
|
|
} // std
|
|
|
|
#endif // _CPP_CMATH
|
|
|
|
|