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/*
* Copyright (c) 2007, Michael Lehn
*
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1) Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2) Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3) Neither the name of the FLENS development group nor the names of
* its contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef FLENS_BLAS_CLOSURES_COPY_TCC
#define FLENS_BLAS_CLOSURES_COPY_TCC 1
#include <flens/auxiliary/auxiliary.h>
#include <flens/blas/closures/closures.h>
#include <flens/blas/level1/level1.h>
#include <flens/blas/level2/level2.h>
#include <flens/blas/level3/level3.h>
#include <flens/typedefs.h>
#ifdef FLENS_DEBUG_CLOSURES
# include <flens/blas/blaslogon.h>
#else
# include <flens/blas/blaslogoff.h>
#endif
namespace flens { namespace blas {
//------------------------------------------------------------------------------
//
// y = beta*z + alpha*op(A)*x
//
template <typename VZ, typename MA, typename VX, typename VY>
typename RestrictTo<DefaultEval<VectorClosureMV<VZ, MA, VX> >::value
&& IsVector<VZ>::value
&& IsMatrix<MA>::value
&& IsVector<VX>::value,
void>::Type
copy(const VectorClosureMV<VZ, MA, VX> &zpAx, Vector<VY> &y)
{
FLENS_BLASLOG_BEGIN_COPY(false, zpAx, y);
using namespace DEBUGCLOSURE;
//
// check if z form rhs and y from lhs are identical
//
typedef typename PruneScaling<VZ>::Remainder RVZ;
const RVZ &z = PruneScaling<VZ>::getRemainder(zpAx.left());
if (!identical(z, y.impl())) {
typedef typename VY::Impl::ElementType TY;
const TY One(1);
//
// z and y are not identical. Compute:
// (1) y = beta*z
// (2) y += alpha*op(A)*x
//
copySum(zpAx.left(), One, zpAx.right(), y.impl());
FLENS_BLASLOG_END;
return;
}
//
// z and y are identical. Get factor beta ...
//
typedef typename PruneScaling<VZ>::ScalingType SVZ;
const SVZ &beta = PruneScaling<VZ>::getFactor(zpAx.left());
//
// ... and let the mv switch do the rest.
//
typedef typename MA::Impl::ElementType TA;
const auto &A = zpAx.right().left();
const auto &x = zpAx.right().right();
mvSwitch(NoTrans, TA(1), A, x, beta, y.impl());
FLENS_BLASLOG_END;
}
} } // namespace blas, flens
#endif // FLENS_BLAS_CLOSURES_COPY_TCC
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