PR libstdc++/68397 std::tr1::expint fails ... long double arguments.
2017-04-20 Edward Smith-Rowland <3dw4rd@verizon.net> PR libstdc++/68397 std::tr1::expint fails ... long double arguments. * include/tr1/exp_integral.tcc: Increase iteration limits. * testsuite/tr1/5_numerical_facilities/special_functions/15_expint/ pr68397.cc: New test. * testsuite/special_functions/14_expint/pr68397.cc: New test. From-SVN: r247027
This commit is contained in:
parent
067bc855b2
commit
4ba07ed462
|
@ -1,3 +1,11 @@
|
|||
2017-04-20 Edward Smith-Rowland <3dw4rd@verizon.net>
|
||||
|
||||
PR libstdc++/68397 std::tr1::expint fails ... long double arguments.
|
||||
* include/tr1/exp_integral.tcc: Increase iteration limits.
|
||||
* testsuite/tr1/5_numerical_facilities/special_functions/15_expint/
|
||||
pr68397.cc: New test.
|
||||
* testsuite/special_functions/14_expint/pr68397.cc: New test.
|
||||
|
||||
2017-04-20 Jonathan Wakely <jwakely@redhat.com>
|
||||
|
||||
PR libstdc++/79862
|
||||
|
|
|
@ -86,7 +86,7 @@ namespace tr1
|
|||
_Tp __term = _Tp(1);
|
||||
_Tp __esum = _Tp(0);
|
||||
_Tp __osum = _Tp(0);
|
||||
const unsigned int __max_iter = 100;
|
||||
const unsigned int __max_iter = 1000;
|
||||
for (unsigned int __i = 1; __i < __max_iter; ++__i)
|
||||
{
|
||||
__term *= - __x / __i;
|
||||
|
@ -156,7 +156,7 @@ namespace tr1
|
|||
_Tp
|
||||
__expint_En_series(unsigned int __n, _Tp __x)
|
||||
{
|
||||
const unsigned int __max_iter = 100;
|
||||
const unsigned int __max_iter = 1000;
|
||||
const _Tp __eps = std::numeric_limits<_Tp>::epsilon();
|
||||
const int __nm1 = __n - 1;
|
||||
_Tp __ans = (__nm1 != 0
|
||||
|
@ -202,7 +202,7 @@ namespace tr1
|
|||
_Tp
|
||||
__expint_En_cont_frac(unsigned int __n, _Tp __x)
|
||||
{
|
||||
const unsigned int __max_iter = 100;
|
||||
const unsigned int __max_iter = 1000;
|
||||
const _Tp __eps = std::numeric_limits<_Tp>::epsilon();
|
||||
const _Tp __fp_min = std::numeric_limits<_Tp>::min();
|
||||
const int __nm1 = __n - 1;
|
||||
|
|
|
@ -0,0 +1,47 @@
|
|||
// { dg-do run { target c++11 } }
|
||||
// { dg-options "-D__STDCPP_WANT_MATH_SPEC_FUNCS__" }
|
||||
// Copyright (C) 2017 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/>.
|
||||
|
||||
// PR libstdc++/68397 - std::tr1::expint fails in __expint_En_cont_frac
|
||||
// for some long double arguments due to low __max_iter value
|
||||
|
||||
#include <cmath>
|
||||
#include <testsuite_hooks.h>
|
||||
|
||||
int
|
||||
test01()
|
||||
{
|
||||
// Answers from Wolfram Alpha.
|
||||
long double ans_ok = -0.10001943365331651406888645149537315243646135979573L;
|
||||
long double ans_bomb = -0.10777727809650077516264612749163100483995270163783L;
|
||||
|
||||
auto Ei_ok = std::expint(-1.500001L);
|
||||
auto diff_ok = Ei_ok - ans_ok;
|
||||
VERIFY(std::abs(diff_ok) < 1.0e-15);
|
||||
|
||||
auto Ei_bomb = std::expint(-1.450001L);
|
||||
auto diff_bomb = Ei_bomb - ans_bomb;
|
||||
VERIFY(std::abs(diff_bomb) < 1.0e-15);
|
||||
}
|
||||
|
||||
int
|
||||
main()
|
||||
{
|
||||
test01();
|
||||
return 0;
|
||||
}
|
|
@ -0,0 +1,46 @@
|
|||
// Copyright (C) 2017 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/>.
|
||||
|
||||
// PR libstdc++/68397 - std::tr1::expint fails in __expint_En_cont_frac
|
||||
// for some long double arguments due to low __max_iter value
|
||||
|
||||
#include <tr1/cmath>
|
||||
#include <testsuite_hooks.h>
|
||||
|
||||
void
|
||||
test01()
|
||||
{
|
||||
// Answers from Wolfram Alpha.
|
||||
long double ans_ok = -0.10001943365331651406888645149537315243646135979573L;
|
||||
long double ans_bomb = -0.10777727809650077516264612749163100483995270163783L;
|
||||
|
||||
long double Ei_ok = std::tr1::expint(-1.500001L);
|
||||
long double diff_ok = std::abs(Ei_ok - ans_ok);
|
||||
VERIFY(diff_ok < 1.0e-15L);
|
||||
|
||||
long double Ei_bomb = std::tr1::expint(-1.450001L);
|
||||
long double diff_bomb = std::abs(Ei_bomb - ans_bomb);
|
||||
VERIFY(diff_bomb < 1.0e-15L);
|
||||
}
|
||||
|
||||
int
|
||||
main()
|
||||
{
|
||||
test01();
|
||||
return 0;
|
||||
}
|
||||
|
Loading…
Reference in New Issue