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re PR libstdc++/50880 (__complex_acosh() picks wrong complex branch) 

2011-10-27  Richard B. Kreckel  <kreckel@ginac.de>
	    Paolo Carlini  <paolo.carlini@oracle.com>

	PR libstdc++/50880
	* include/std/complex (__complex_acosh): Fix for __z.real() < 0.
	* include/tr1/complex (__complex_acosh): Likewise.
	* testsuite/26_numerics/complex/50880.cc: New.
	* testsuite/tr1/8_c_compatibility/complex/50880.cc: Likewise.

Co-Authored-By: Paolo Carlini <paolo.carlini@oracle.com>

From-SVN: r180563
This commit is contained in:
Richard B. Kreckel 2011-10-27 11:00:25 +00:00 committed by Paolo Carlini
parent e7a7929d91
commit 259f206328
5 changed files with 117 additions and 0 deletions
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9
libstdc++-v3/ChangeLog
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@ -1,3 +1,12 @@
2011-10-27 Richard B. Kreckel <kreckel@ginac.de>
Paolo Carlini <paolo.carlini@oracle.com>
PR libstdc++/50880
* include/std/complex (__complex_acosh): Fix for __z.real() < 0.
* include/tr1/complex (__complex_acosh): Likewise.
* testsuite/26_numerics/complex/50880.cc: New.
* testsuite/tr1/8_c_compatibility/complex/50880.cc: Likewise.
2011-10-27 Jonathan Wakely <jwakely.gcc@gmail.com>
PR libstdc++/50862

2
libstdc++-v3/include/std/complex
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@ -1690,6 +1690,8 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
* (__z.real() + __z.imag()) - _Tp(1.0),
_Tp(2.0) * __z.real() * __z.imag());
__t = std::sqrt(__t);
if (__z.real() < _Tp(-0.0))
__t = -__t;
return std::log(__t + __z);
}

2
libstdc++-v3/include/tr1/complex
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@ -189,6 +189,8 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
* (__z.real() + __z.imag()) - _Tp(1.0),
_Tp(2.0) * __z.real() * __z.imag());
__t = std::sqrt(__t);
if (__z.real() < _Tp(-0.0))
__t = -__t;
return std::log(__t + __z);
}

53
libstdc++-v3/testsuite/26_numerics/complex/50880.cc Normal file
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@ -0,0 +1,53 @@
// { dg-options "-std=gnu++0x" }
//
// Copyright (C) 2011 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.
//
// You should have received a copy of the GNU General Public License along
// with this library; see the file COPYING3. If not see
// <http://www.gnu.org/licenses/>.
#include <complex>
#include <testsuite_hooks.h>
template<typename T>
void test01_do()
{
bool test __attribute__((unused)) = true;
const std::complex<T> ca(T(-2), T(2));
const std::complex<T> cb(T(-2), T(0));
const std::complex<T> cc(T(-2), T(-2));
std::complex<T> cra = std::acosh(ca);
std::complex<T> crb = std::acosh(cb);
std::complex<T> crc = std::acosh(cc);
VERIFY( cra.real() > T(0) );
VERIFY( crb.real() > T(0) );
VERIFY( crc.real() > T(0) );
}
// libstdc++/50880
void test01()
{
test01_do<float>();
test01_do<double>();
test01_do<long double>();
}
int main()
{
test01();
return 0;
}

51
libstdc++-v3/testsuite/tr1/8_c_compatibility/complex/50880.cc Normal file
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@ -0,0 +1,51 @@
// Copyright (C) 2011 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.
//
// You should have received a copy of the GNU General Public License along
// with this library; see the file COPYING3. If not see
// <http://www.gnu.org/licenses/>.
#include <tr1/complex>
#include <testsuite_hooks.h>
template<typename T>
void test01_do()
{
bool test __attribute__((unused)) = true;
const std::complex<T> ca(T(-2), T(2));
const std::complex<T> cb(T(-2), T(0));
const std::complex<T> cc(T(-2), T(-2));
std::complex<T> cra = std::tr1::acosh(ca);
std::complex<T> crb = std::tr1::acosh(cb);
std::complex<T> crc = std::tr1::acosh(cc);
VERIFY( cra.real() > T(0) );
VERIFY( crb.real() > T(0) );
VERIFY( crc.real() > T(0) );
}
// libstdc++/50880
void test01()
{
test01_do<float>();
test01_do<double>();
test01_do<long double>();
}
int main()
{
test01();
return 0;
}