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gcc/libstdc++-v3/include/c_std/std_cmath.h
Roger Sayle d52e4867ca re PR c++/5998 (regression, all builtins disabled) 
* include/c_std/std_cmath.h:  To prevent problems overloading
	g++ builtins, use the double variants from the global namespace
	before defining float and long double variants in std::.

	PR c++/5998:
	* decl.c (cxx_init_decl_processing): Re-enable built-in functions
	in the g++ front-end.
	(duplicate_decl): Allow redefinition of anticipated built-ins.
	Fix inlining problem by over-writing the old DECL_RTL.
	(lookup_namespace_name): Fail to find an identifier in the
	specified namespace if its still anticipated.
	(builtin_function_1): New function split out from builtin_function
	to create a builtin in the current namespace with given context.
	(builtin_function): Call builtin_function_1 to define the
	appropriate builtins in both the std and global namespaces.
	(select_decl): Don't test for anticipated decls here.
	(unqualified_namespace_lookup): Instead ignore them whilst
	searching through scopes and namespaces.
	* decl2.c (do_nonmember_using_decl): If a using declaration
	specifies an anticipated built-in function, mark it as no longer
	anticipated in that scope.
	(ambiguous_decl):  Avoid resolving to an anticipated decl.
	* lex.c (do_scoped_id): Fail to find an identifier in the global
	namespace if its still anticipated.

	* g++.old-deja/g++.other/builtins5.C: New test.
	* g++.old-deja/g++.other/builtins6.C: New test.
	* g++.old-deja/g++.other/builtins7.C: New test.
	* g++.old-deja/g++.other/builtins8.C: New test.
	* g++.old-deja/g++.other/builtins9.C: New test.

From-SVN: r51568
2002-03-29 20:41:53 +00:00

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// -*- C++ -*- C forwarding header.
// Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002
// 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 2, 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.
// You should have received a copy of the GNU General Public License along
// with this library; see the file COPYING. If not, write to the Free
// Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
// USA.
// As a special exception, you may use this file as part of a free software
// library without restriction. Specifically, if other files instantiate
// templates or use macros or inline functions from this file, or you compile
// this file and link it with other files to produce an executable, this
// file does not by itself cause the resulting executable to be covered by
// the GNU General Public License. This exception does not however
// invalidate any other reasons why the executable file might be covered by
// the GNU General Public License.
//
// ISO C++ 14882: 26.5 C library
//
/** @file cmath
* This is a Standard C++ Library file. You should @c #include this file
* in your programs, rather than any of the "*.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.
*/
#ifndef _CPP_CMATH
#define _CPP_CMATH 1
#pragma GCC system_header
#include <bits/c++config.h>
#include <math.h>
// 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
{
// Forward declaration of a helper function. This really should be
// an `exported' forward declaration.
template<typename _Tp> _Tp __cmath_power(_Tp, unsigned int);
template<typename _Tp>
inline _Tp
__cmath_abs(_Tp __x)
{
return __x < _Tp() ? -__x : __x;
}
inline double
abs(double __x)
{ return __builtin_fabs(__x); }
inline float
abs(float __x)
{ return __builtin_fabsf(__x); }
inline long double
abs(long double __x)
{ return __builtin_fabsl(__x); }
#if _GLIBCPP_HAVE_ACOSF
inline float
acos(float __x) { return ::acosf(__x); }
#else
inline float
acos(float __x) { return ::acos(static_cast<double>(__x)); }
#endif
using ::acos;
#if _GLIBCPP_HAVE_ACOSL
inline long double
acos(long double __x) { return ::acosl(__x); }
#else
inline long double
acos(long double __x) { return ::acos(static_cast<double>(__x)); }
#endif
using ::asin;
#if _GLIBCPP_HAVE_ASINF
inline float
asin(float __x) { return ::asinf(__x); }
#else
inline float
asin(float __x) { return ::asin(static_cast<double>(__x)); }
#endif
#if _GLIBCPP_HAVE_ASINL
inline long double
asin(long double __x) { return ::asinl(__x); }
#else
inline long double
asin(long double __x) { return ::asin(static_cast<double>(__x)); }
#endif
using ::atan;
#if _GLIBCPP_HAVE_ATANF
inline float
atan(float __x) { return ::atanf(__x); }
#else
inline float
atan(float __x) { return ::atan(static_cast<double>(__x)); }
#endif
#if _GLIBCPP_HAVE_ATANL
inline long double
atan(long double __x) { return ::atanl(__x); }
#else
inline long double
atan(long double __x) { return ::atan(static_cast<double>(__x)); }
#endif
using ::atan2;
#if _GLIBCPP_HAVE_ATAN2F
inline float
atan2(float __y, float __x) { return ::atan2f(__y, __x); }
#else
inline float
atan2(float __y, float __x)
{ return ::atan2(static_cast<double>(__y), static_cast<double>(__x)); }
#endif
#if _GLIBCPP_HAVE_ATAN2L
inline long double
atan2(long double __y, long double __x) { return ::atan2l(__y, __x); }
#else
inline long double
atan2(long double __y, long double __x)
{ return ::atan2(static_cast<double>(__y), static_cast<double>(__x)); }
#endif
using ::ceil;
#if _GLIBCPP_HAVE_CEILF
inline float
ceil(float __x) { return ::ceilf(__x); }
#else
inline float
ceil(float __x) { return ::ceil(static_cast<double>(__x)); }
#endif
#if _GLIBCPP_HAVE_CEILL
inline long double
ceil(long double __x) { return ::ceill(__x); }
#else
inline long double
ceil(long double __x) { return ::ceil(static_cast<double>(__x)); }
#endif
using ::cos;
inline float
cos(float __x)
{ return __builtin_cosf(__x); }
inline long double
cos(long double __x)
{ return __builtin_cosl(__x); }
using ::cosh;
#if _GLIBCPP_HAVE_COSHF
inline float
cosh(float __x) { return ::coshf(__x); }
#else
inline float
cosh(float __x) { return ::cosh(static_cast<double>(__x)); }
#endif
#if _GLIBCPP_HAVE_COSHL
inline long double
cosh(long double __x) { return ::coshl(__x); }
#else
inline long double
cosh(long double __x) { return ::cosh(static_cast<double>(__x)); }
#endif
using ::exp;
#if _GLIBCPP_HAVE_EXPF
inline float
exp(float __x) { return ::expf(__x); }
#else
inline float
exp(float __x) { return ::exp(static_cast<double>(__x)); }
#endif
#if _GLIBCPP_HAVE_EXPL
inline long double
exp(long double __x) { return ::expl(__x); }
#else
inline long double
exp(long double __x) { return ::exp(static_cast<double>(__x)); }
#endif
using ::fabs;
inline float
fabs(float __x)
{ return __builtin_fabsf(__x); }
inline long double
fabs(long double __x)
{ return __builtin_fabsl(__x); }
using ::floor;
#if _GLIBCPP_HAVE_FLOORF
inline float
floor(float __x) { return ::floorf(__x); }
#else
inline float
floor(float __x) { return ::floor(static_cast<double>(__x)); }
#endif
#if _GLIBCPP_HAVE_FLOORL
inline long double
floor(long double __x) { return ::floorl(__x); }
#else
inline long double
floor(long double __x) { return ::floor(static_cast<double>(__x)); }
#endif
using ::fmod;
#if _GLIBCPP_HAVE_FMODF
inline float
fmod(float __x, float __y) { return ::fmodf(__x, __y); }
#else
inline float
fmod(float __x, float __y)
{ return ::fmod(static_cast<double>(__x), static_cast<double>(__y)); }
#endif
#if _GLIBCPP_HAVE_FMODL
inline long double
fmod(long double __x, long double __y) { return ::fmodl(__x, __y); }
#else
inline long double
fmod(long double __x, long double __y)
{ return ::fmod(static_cast<double>(__x), static_cast<double>(__y)); }
#endif
using ::frexp;
#if _GLIBCPP_HAVE_FREXPF
inline float
frexp(float __x, int* __exp) { return ::frexpf(__x, __exp); }
#else
inline float
frexp(float __x, int* __exp) { return ::frexp(__x, __exp); }
#endif
#if _GLIBCPP_HAVE_FREXPL
inline long double
frexp(long double __x, int* __exp) { return ::frexpl(__x, __exp); }
#else
inline long double
frexp(long double __x, int* __exp)
{ return ::frexp(static_cast<double>(__x), __exp); }
#endif
using ::ldexp;
#if _GLIBCPP_HAVE_LDEXPF
inline float
ldexp(float __x, int __exp) { return ::ldexpf(__x, __exp); }
#else
inline float
ldexp(float __x, int __exp)
{ return ::ldexp(static_cast<double>(__x), __exp); }
#endif
#if _GLIBCPP_HAVE_LDEXPL
inline long double
ldexp(long double __x, int __exp) { return ::ldexpl(__x, __exp); }
#else
inline long double
ldexp(long double __x, int __exp)
{ return ::ldexp(static_cast<double>(__x), __exp); }
#endif
using ::log;
#if _GLIBCPP_HAVE_LOGF
inline float
log(float __x) { return ::logf(__x); }
#else
inline float log(float __x)
{ return ::log(static_cast<double>(__x)); }
#endif
#if _GLIBCPP_HAVE_LOGL
inline long double
log(long double __x) { return ::logl(__x); }
#else
inline long double
log(long double __x) { return ::log(static_cast<double>(__x)); }
#endif
using ::log10;
#if _GLIBCPP_HAVE_LOG10F
inline float
log10(float __x) { return ::log10f(__x); }
#else
inline float
log10(float __x) { return ::log10(static_cast<double>(__x)); }
#endif
#if _GLIBCPP_HAVE_LOG10L
inline long double
log10(long double __x) { return ::log10l(__x); }
#else
inline long double
log10(long double __x) { return ::log10(static_cast<double>(__x)); }
#endif
using ::modf;
#if _GLIBCPP_HAVE_MODFF
inline float
modf(float __x, float* __iptr) { return ::modff(__x, __iptr); }
#else
inline float
modf(float __x, float* __iptr)
{
double __tmp;
double __res = ::modf(static_cast<double>(__x), &__tmp);
*__iptr = static_cast<float>(__tmp);
return __res;
}
#endif
#if _GLIBCPP_HAVE_MODFL
inline long double
modf(long double __x, long double* __iptr) { return ::modfl(__x, __iptr); }
#else
inline long double
modf(long double __x, long double* __iptr)
{
double __tmp;
double __res = ::modf(static_cast<double>(__x), &__tmp);
* __iptr = static_cast<long double>(__tmp);
return __res;
}
#endif
template<typename _Tp>
inline _Tp
__pow_helper(_Tp __x, int __n)
{
return __n < 0
? _Tp(1)/__cmath_power(__x, -__n)
: __cmath_power(__x, __n);
}
using ::pow;
#if _GLIBCPP_HAVE_POWF
inline float
pow(float __x, float __y) { return ::powf(__x, __y); }
#else
inline float
pow(float __x, float __y)
{ return ::pow(static_cast<double>(__x), static_cast<double>(__y)); }
#endif
#if _GLIBCPP_HAVE_POWL
inline long double
pow(long double __x, long double __y) { return ::powl(__x, __y); }
#else
inline long double
pow(long double __x, long double __y)
{ return ::pow(static_cast<double>(__x), static_cast<double>(__y)); }
#endif
inline double
pow(double __x, int __i)
{ return __pow_helper(__x, __i); }
inline float
pow(float __x, int __n)
{ return __pow_helper(__x, __n); }
inline long double
pow(long double __x, int __n)
{ return __pow_helper(__x, __n); }
using ::sin;
inline float
sin(float __x)
{ return __builtin_sinf(__x); }
inline long double
sin(long double __x)
{ return __builtin_sinl(__x); }
using ::sinh;
#if _GLIBCPP_HAVE_SINHF
inline float
sinh(float __x) { return ::sinhf(__x); }
#else
inline float
sinh(float __x) { return ::sinh(static_cast<double>(__x)); }
#endif
#if _GLIBCPP_HAVE_SINHL
inline long double
sinh(long double __x) { return ::sinhl(__x); }
#else
inline long double
sinh(long double __x) { return ::sinh(static_cast<double>(__x)); }
#endif
using ::sqrt;
inline float
sqrt(float __x)
{ return __builtin_sqrtf(__x); }
inline long double
sqrt(long double __x)
{ return __builtin_sqrtl(__x); }
using ::tan;
#if _GLIBCPP_HAVE_TANF
inline float
tan(float __x) { return ::tanf(__x); }
#else
inline float
tan(float __x) { return ::tan(static_cast<double>(__x)); }
#endif
#if _GLIBCPP_HAVE_TANL
inline long double
tan(long double __x) { return ::tanl(__x); }
#else
inline long double
tan(long double __x) { return ::tan(static_cast<double>(__x)); }
#endif
using ::tanh;
#if _GLIBCPP_HAVE_TANHF
inline float
tanh(float __x) { return ::tanhf(__x); }
#else
inline float
tanh(float __x) { return ::tanh(static_cast<double>(__x)); }
#endif
#if _GLIBCPP_HAVE_TANHL
inline long double
tanh(long double __x) { return ::tanhl(__x); }
#else
inline long double
tanh(long double __x) { return ::tanh(static_cast<double>(__x)); }
#endif
}
#if _GLIBCPP_USE_C99
// These are possible macros imported from C99-land. For strict
// conformance, remove possible C99-injected names from the global
// namespace, and sequester them in the __gnu_cxx extension namespace.
namespace __gnu_cxx
{
template<typename _Tp>
int
__capture_fpclassify(_Tp __f) { return fpclassify(__f); }
template<typename _Tp>
int
__capture_isfinite(_Tp __f) { return isfinite(__f); }
template<typename _Tp>
int
__capture_isinf(_Tp __f) { return isinf(__f); }
template<typename _Tp>
int
__capture_isnan(_Tp __f) { return isnan(__f); }
template<typename _Tp>
int
__capture_isnormal(_Tp __f) { return isnormal(__f); }
template<typename _Tp>
int
__capture_signbit(_Tp __f) { return signbit(__f); }
template<typename _Tp>
int
__capture_isgreater(_Tp __f1, _Tp __f2)
{ return isgreater(__f1, __f2); }
template<typename _Tp>
int
__capture_isgreaterequal(_Tp __f1, _Tp __f2)
{ return isgreaterequal(__f1, __f2); }
template<typename _Tp>
int
__capture_isless(_Tp __f1, _Tp __f2) { return isless(__f1, __f2); }
template<typename _Tp>
int
__capture_islessequal(_Tp __f1, _Tp __f2)
{ return islessequal(__f1, __f2); }
template<typename _Tp>
int
__capture_islessgreater(_Tp __f1, _Tp __f2)
{ return islessgreater(__f1, __f2); }
template<typename _Tp>
int
__capture_isunordered(_Tp __f1, _Tp __f2)
{ return isunordered(__f1, __f2); }
}
#endif
#undef fpclassify
#undef isfinite
#undef isinf
#undef isnan
#undef isnormal
#undef signbit
#undef isgreater
#undef isgreaterequal
#undef isless
#undef islessequal
#undef islessgreater
#undef isunordered
#if _GLIBCPP_USE_C99
namespace __gnu_cxx
{
template<typename _Tp>
int
fpclassify(_Tp __f) { return __capture_fpclassify(__f); }
template<typename _Tp>
int
isfinite(_Tp __f) { return __capture_isfinite(__f); }
template<typename _Tp>
int
isinf(_Tp __f) { return __capture_isinf(__f); }
template<typename _Tp>
int
isnan(_Tp __f) { return __capture_isnan(__f); }
template<typename _Tp>
int
isnormal(_Tp __f) { return __capture_isnormal(__f); }
template<typename _Tp>
int
signbit(_Tp __f) { return __capture_signbit(__f); }
template<typename _Tp>
int
isgreater(_Tp __f1, _Tp __f2) { return __capture_isgreater(__f1, __f2); }
template<typename _Tp>
int
isgreaterequal(_Tp __f1, _Tp __f2)
{ return __capture_isgreaterequal(__f1, __f2); }
template<typename _Tp>
int
isless(_Tp __f1, _Tp __f2) { return __capture_isless(__f1, __f2); }
template<typename _Tp>
int
islessequal(_Tp __f1, _Tp __f2)
{ return __capture_islessequal(__f1, __f2); }
template<typename _Tp>
int
islessgreater(_Tp __f1, _Tp __f2)
{ return __capture_islessgreater(__f1, __f2); }
template<typename _Tp>
int
isunordered(_Tp __f1, _Tp __f2)
{ return __capture_isunordered(__f1, __f2); }
}
namespace std
{
using __gnu_cxx::fpclassify;
using __gnu_cxx::isfinite;
using __gnu_cxx::isinf;
using __gnu_cxx::isnan;
using __gnu_cxx::isnormal;
using __gnu_cxx::signbit;
using __gnu_cxx::isgreater;
using __gnu_cxx::isgreaterequal;
using __gnu_cxx::isless;
using __gnu_cxx::islessequal;
using __gnu_cxx::islessgreater;
using __gnu_cxx::isunordered;
}
#endif
#ifdef _GLIBCPP_NO_TEMPLATE_EXPORT
# define export
# include <bits/cmath.tcc>
#endif
#endif
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