/usr/include/trilinos/RTOpPack_ROpWeightedNorm2.hpp is in libtrilinos-rtop-dev 12.10.1-3.
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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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// @HEADER
#ifndef RTOPPACK_ROP_WEIGHTED_NORM2_HPP
#define RTOPPACK_ROP_WEIGHTED_NORM2_HPP
#include "RTOpPack_RTOpTHelpers.hpp"
namespace RTOpPack {
/** \brief . */
template<class Scalar>
class ROpWeightedNorm2EleWiseReduction
{
public:
void operator()( const Scalar &v0, const Scalar &v1, Scalar &reduct ) const
{
reduct += v0 * ScalarTraits<Scalar>::conjugate(v1)*v1;
}
};
/** \brief Weighted Two (Euclidean) norm reduction operator: <tt>result =
* sqrt( sum( v0[i]*conj(v1[i])*v1[i], i=0...n-1 ) )</tt>.
*/
template<class Scalar>
class ROpWeightedNorm2
: public ROp_2_ScalarReduction<Scalar, Scalar,
ROpWeightedNorm2EleWiseReduction<Scalar> >
{
public:
/** \brief . */
typedef Teuchos::ScalarTraits<Scalar> ST;
/** \brief . */
ROpWeightedNorm2()
{
this->setOpNameBase("ROpWeightedNorm2");
}
/** \brief . */
typename ST::magnitudeType operator()(const ReductTarget& reduct_obj ) const
{ return ST::magnitude(ST::squareroot(this->getRawVal(reduct_obj))); }
};
} // namespace RTOpPack
#endif // RTOPPACK_ROP_WEIGHTED_NORM2_HPP
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