RTOpPack_ROpWeightedNorm2.hpp

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00003 // 
00004 // RTOp: Interfaces and Support Software for Vector Reduction Transformation
00005 //       Operations
00006 //                Copyright (2006) Sandia Corporation
00007 // 
00008 // Under terms of Contract DE-AC04-94AL85000, there is a non-exclusive
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00010 // 
00011 // This library is free software; you can redistribute it and/or modify
00012 // it under the terms of the GNU Lesser General Public License as
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00029 
00030 #ifndef RTOPPACK_ROP_WEIGHTED_NORM2_HPP
00031 #define RTOPPACK_ROP_WEIGHTED_NORM2_HPP
00032 
00033 #include "RTOpPack_RTOpTHelpers.hpp"
00034 
00035 namespace RTOpPack {
00036 
00039 template<class Scalar>
00040 class ROpWeightedNorm2 : public ROpScalarReductionBase<Scalar> {
00041   typedef Teuchos::ScalarTraits<Scalar> ST;
00042 public:
00044   ROpWeightedNorm2() : RTOpT<Scalar>("ROpWeightedNorm2") {}
00046   typename Teuchos::ScalarTraits<Scalar>::magnitudeType
00047   operator()(const ReductTarget& reduct_obj ) const
00048     { return ST::magnitude(ST::squareroot(this->getRawVal(reduct_obj))); }
00052   void apply_op(
00053     const int   num_vecs,       const ConstSubVectorView<Scalar>         sub_vecs[]
00054     ,const int  num_targ_vecs,  const SubVectorView<Scalar>  targ_sub_vecs[]
00055     ,ReductTarget *_reduct_obj
00056     ) const
00057     {
00058       using Teuchos::dyn_cast;
00059       ReductTargetScalar<Scalar> &reduct_obj = dyn_cast<ReductTargetScalar<Scalar> >(*_reduct_obj); 
00060       RTOP_APPLY_OP_2_0(num_vecs,sub_vecs,num_targ_vecs,targ_sub_vecs);
00061       Scalar sum = reduct_obj.get();
00062       for( Teuchos_Index i = 0; i < subDim; ++i, v0_val += v0_s, v1_val += v1_s ) {
00063         sum += (*v0_val) * ST::conjugate(*v1_val) * (*v1_val);
00064       }
00065       reduct_obj.set(sum);
00066     }
00068 }; // class ROpWeightedNorm2
00069 
00070 } // namespace RTOpPack
00071 
00072 #endif // RTOPPACK_ROP_WEIGHTED_NORM2_HPP

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