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PR libstdc++/28277 (partial: valarray bits)

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2006-07-16  Paolo Carlini  <pcarlini@suse.de>

	PR libstdc++/28277 (partial: valarray bits)
	* include/std/std_valarray.h (valarray<>::shift(int),
	valarray<>::cshift(int)): Avoid __builtin_alloca with no limit,
	do the work in place.
	* testsuite/26_numerics/valarray/28277.cc: New.

From-SVN: r115501
This commit is contained in:
Paolo Carlini 2006-07-16 15:38:59 +00:00 committed by Paolo Carlini
parent d9f392cf04
commit 22d67c60fa
3 changed files with 91 additions and 24 deletions
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8
libstdc++-v3/ChangeLog
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@ -1,3 +1,11 @@
2006-07-16 Paolo Carlini <pcarlini@suse.de>
PR libstdc++/28277 (partial: valarray bits)
* include/std/std_valarray.h (valarray<>::shift(int),
valarray<>::cshift(int)): Avoid __builtin_alloca with no limit,
do the work in place.
* testsuite/26_numerics/valarray/28277.cc: New.
2006-07-15 Paolo Carlini <pcarlini@suse.de>
PR libstdc++/28277 (partial: ostream bits 1)

63
libstdc++-v3/include/std/std_valarray.h
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@ -778,63 +778,78 @@ _GLIBCXX_BEGIN_NAMESPACE(std)
return std::__valarray_sum(_M_data, _M_data + _M_size);
}
template <class _Tp>
template<class _Tp>
inline valarray<_Tp>
valarray<_Tp>::shift(int __n) const
{
_Tp* const __a = static_cast<_Tp*>
(__builtin_alloca(sizeof(_Tp) * _M_size));
valarray<_Tp> __ret;
_Tp* __restrict__ __tmp_M_data =
std::__valarray_get_storage<_Tp>(_M_size);
if (__n == 0) // no shift
std::__valarray_copy_construct(_M_data, _M_data + _M_size, __a);
std::__valarray_copy_construct(_M_data, _M_data + _M_size,
__tmp_M_data);
else if (__n > 0) // __n > 0: shift left
{
if (size_t(__n) > _M_size)
std::__valarray_default_construct(__a, __a + __n);
std::__valarray_default_construct(__tmp_M_data,
__tmp_M_data + __n);
else
{
std::__valarray_copy_construct(_M_data + __n,
_M_data + _M_size, __a);
std::__valarray_default_construct(__a + _M_size -__n,
__a + _M_size);
_M_data + _M_size,
__tmp_M_data);
std::__valarray_default_construct(__tmp_M_data + _M_size - __n,
__tmp_M_data + _M_size);
}
}
else // __n < 0: shift right
{
std::__valarray_copy_construct (_M_data, _M_data + _M_size + __n,
__a - __n);
std::__valarray_default_construct(__a, __a - __n);
std::__valarray_copy_construct(_M_data, _M_data + _M_size + __n,
__tmp_M_data - __n);
std::__valarray_default_construct(__tmp_M_data,
__tmp_M_data - __n);
}
return valarray<_Tp>(__a, _M_size);
__ret._M_size = _M_size;
__ret._M_data = __tmp_M_data;
return __ret;
}
template <class _Tp>
template<class _Tp>
inline valarray<_Tp>
valarray<_Tp>::cshift (int __n) const
valarray<_Tp>::cshift(int __n) const
{
_Tp* const __a = static_cast<_Tp*>
(__builtin_alloca (sizeof(_Tp) * _M_size));
valarray<_Tp> __ret;
_Tp* __restrict__ __tmp_M_data =
std::__valarray_get_storage<_Tp>(_M_size);
if (__n == 0) // no cshift
std::__valarray_copy_construct(_M_data, _M_data + _M_size, __a);
std::__valarray_copy_construct(_M_data, _M_data + _M_size,
__tmp_M_data);
else if (__n > 0) // cshift left
{
std::__valarray_copy_construct(_M_data, _M_data + __n,
__a + _M_size - __n);
__tmp_M_data + _M_size - __n);
std::__valarray_copy_construct(_M_data + __n, _M_data + _M_size,
__a);
__tmp_M_data);
}
else // cshift right
{
std::__valarray_copy_construct
(_M_data + _M_size + __n, _M_data + _M_size, __a);
(_M_data + _M_size + __n, _M_data + _M_size, __tmp_M_data);
std::__valarray_copy_construct
(_M_data, _M_data + _M_size+__n, __a - __n);
(_M_data, _M_data + _M_size + __n, __tmp_M_data - __n);
}
return valarray<_Tp>(__a, _M_size);
__ret._M_size = _M_size;
__ret._M_data = __tmp_M_data;
return __ret;
}
template <class _Tp>
template<class _Tp>
inline void
valarray<_Tp>::resize (size_t __n, _Tp __c)
valarray<_Tp>::resize(size_t __n, _Tp __c)
{
// This complication is so to make valarray<valarray<T> > work
// even though it is not required by the standard. Nobody should

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libstdc++-v3/testsuite/26_numerics/valarray/28277.cc Normal file
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@ -0,0 +1,44 @@
// 2006-07-15 Paolo Carlini <pcarlini@suse.de>
// Copyright (C) 2006 Free Software Foundation
//
// 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, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
// USA.
#include <valarray>
#include <testsuite_hooks.h>
// libstdc++/28277
void test01()
{
bool test __attribute__((unused)) = true;
const std::valarray<int> v1(1, 5000000);
const std::valarray<int> v2 = v1.shift(1);
VERIFY( v2.size() == v1.size() );
VERIFY( v2[v1.size() - 1] == 0 );
const std::valarray<int> v3 = v2.cshift(-1);
VERIFY( v3.size() == v2.size() );
VERIFY( v3[0] == 0 );
}
int main()
{
test01();
return 0;
}