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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_LEVEL1_COPYRSCAL_TCC
#define FLENS_BLAS_CLOSURES_LEVEL1_COPYRSCAL_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 = x/alpha
//
// We evalute this with a rscalSwitch
// case 1: x is no closure
// case 2: x is a closure
//
// case 1: x is no closure
//
template <typename ALPHA, typename VX, typename VY>
typename RestrictTo<IsVector<VX>::value
&& !IsVectorClosure<VX>::value,
void>::Type
copyRScal(const ALPHA &alpha, const VX &x, Vector<VY> &y)
{
using namespace DEBUGCLOSURE;
if (identical(x.impl(), y.impl())) {
rscal(alpha, y.impl());
} else {
//
// Zero should have the same type as elements of y so that CBLAS
// gets called if possible.
//
const typename VX::Impl::ElementType Zero(0);
scal(Zero, y.impl());
raxpy(alpha, x.impl(), y.impl());
}
}
//
// case 2: x is a closure
//
template <typename ALPHA, typename VX, typename VY>
typename RestrictTo<IsVectorClosure<VX>::value,
void>::Type
copyRScal(const ALPHA &alpha, const VX &x, Vector<VY> &y)
{
copy(x, y.impl());
rscal(alpha, y.impl());
}
//------------------------------------------------------------------------------
//
// B = op(A)/alpha
//
// We evalute this with a scalSwitch
// case 1: A is no closure
// case 2: A is a closure
//
// case 1: A is no closure
//
template <typename ALPHA, typename MA, typename MB>
typename RestrictTo<IsMatrix<MA>::value
&& !IsMatrixClosure<MA>::value,
void>::Type
copyRScal(Transpose trans, const ALPHA &alpha, const MA &A, Matrix<MB> &B)
{
using namespace DEBUGCLOSURE;
if (identical(A.impl(), B.impl())) {
rscal(alpha, B.impl());
if (trans!=NoTrans) {
cotr(trans, B.impl());
}
} else {
//
// Zero should have the same type as elements of y so that CBLAS
// gets called if possible.
//
const typename MA::Impl::ElementType Zero(0);
scal(Zero, B.impl());
raxpy(trans, alpha, A.impl(), B.impl());
}
}
//
// case 2: A is a closure
//
template <typename ALPHA, typename MA, typename MB>
typename RestrictTo<IsMatrixClosure<MA>::value,
void>::Type
copyRScal(Transpose trans, const ALPHA &alpha, const MA &A, Matrix<MB> &B)
{
copy(trans, A, B.impl());
rscal(alpha, B.impl());
}
} } // namespace blas, flens
#endif // FLENS_BLAS_CLOSURES_LEVEL1_COPYRSCAL_TCC
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