/usr/include/trilinos/NOX_TOpEleWiseMinSwap.hpp is in libtrilinos-nox-dev 12.4.2-2.
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// ***********************************************************************
//
// RTOp: Interfaces and Support Software for Vector Reduction Transformation
// Operations
// Copyright (2006) Sandia Corporation
//
// Under terms of Contract DE-AC04-94AL85000, there is a non-exclusive
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// modification, are permitted provided that the following conditions are
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// 1. Redistributions of source code must retain the above copyright
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// 2. Redistributions in binary form must reproduce the above copyright
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// documentation and/or other materials provided with the distribution.
//
// 3. Neither the name of the Corporation nor the names of the
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
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// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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// @HEADER
#ifndef RTOPPACK_TOP_ELE_WISE_MIN_SWAP_HPP
#define RTOPPACK_TOP_ELE_WISE_MIN_SWAP_HPP
#include "RTOpPack_RTOpTHelpers.hpp"
#include "Thyra_VectorBase.hpp"
#include <cmath>
namespace RTOpPack {
/** \brief Element-wise transformation operator for TOpEleWiseMinSwap. */
template<class Scalar>
class TOpEleWiseMinSwapEleWiseTransformation
{
public:
void operator()( const Scalar &v0, Scalar &z0 ) const
{
if (std::abs(z0) > v0)
z0 = v0 * (z0/std::abs(z0));
}
};
/** \brief Element-wise product update transformation operator:
* <tt>z0[i] *= min(v0[i],abs(z0[i]) * z0[i]/abs(z0[i]), i=0...n-1</tt>.
*/
template<class Scalar>
class TOpEleWiseMinSwap
: public TOp_1_1_Base<Scalar, TOpEleWiseMinSwapEleWiseTransformation<Scalar> >
{
public:
typedef TOp_1_1_Base<Scalar, TOpEleWiseMinSwapEleWiseTransformation<Scalar> > base_t;
/** \brief . */
TOpEleWiseMinSwap()
: base_t(TOpEleWiseMinSwapEleWiseTransformation<Scalar>())
{
this->setOpNameBase("TOpEleWiseMinSwap");
}
};
} // namespace RTOpPack
namespace Thyra {
/** \brief Element-wise min swap:
* <tt>y(i) *= min(x(i),abs(y(i)) * y(i)/abs(y(i), i = 0...y->space()->dim()-1</tt>.
*
* \relates VectorBase
*/
template<class Scalar>
void ele_wise_min_swap( const ::Thyra::VectorBase<Scalar>& x,
const Teuchos::Ptr< ::Thyra::VectorBase<Scalar> > &y )
{
using Teuchos::tuple; using Teuchos::ptrInArg; using Teuchos::null;
RTOpPack::TOpEleWiseMinSwap<Scalar> ele_wise_min_swap_op;
::Thyra::applyOp<Scalar>( ele_wise_min_swap_op, tuple(ptrInArg(x)),
tuple(y), null );
}
}
#endif // RTOPPACK_TOP_ELE_WISE_MIN_SWAP_HPP
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