Zoltan2_MultiJagged_ReductionOps.hpp

Go to the documentation of this file.

// @HEADER
//
// ***********************************************************************
//
//   Zoltan2: A package of combinatorial algorithms for scientific computing
//                  Copyright 2012 Sandia Corporation
//
// Under the terms of Contract DE-AC04-94AL85000 with Sandia Corporation,
// the U.S. Government retains certain rights in this software.
//
// 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 Corporation nor the names of the
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY SANDIA CORPORATION "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 SANDIA CORPORATION OR THE
// 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.
//
// Questions? Contact Karen Devine      (kddevin@sandia.gov)
//                    Erik Boman        (egboman@sandia.gov)
//                    Siva Rajamanickam (srajama@sandia.gov)
//
// ***********************************************************************
//
// @HEADER

#ifndef _ZOLTAN2_MultiJagged_ReductionOps_HPP_
#define _ZOLTAN2_MultiJagged_ReductionOps_HPP_

#include <Teuchos_ReductionOp.hpp>

namespace Teuchos{
template <typename Ordinal, typename T>
class MultiJaggedCombinedReductionOp  : public ValueTypeReductionOp<Ordinal,T>
{
private:
    Ordinal numSum_0, numMin_1, numMin_2;
    std::vector <Ordinal> *partVector;
    Ordinal vectorBegin;
    Ordinal k;
    int reductionType;

public:
    MultiJaggedCombinedReductionOp ():numSum_0(0), numMin_1(0),
        numMin_2(0), k(0), partVector(NULL), vectorBegin(0), reductionType(0){}

    MultiJaggedCombinedReductionOp (Ordinal nsum, Ordinal nmin1, Ordinal nmin2,
     Ordinal k_):
        numSum_0(nsum), numMin_1(nmin1), numMin_2(nmin2), partVector(NULL),
        vectorBegin(0), k(k_), reductionType(0){}


    MultiJaggedCombinedReductionOp (std::vector <Ordinal> *pVector, Ordinal vBegin,
     Ordinal k_):
        numSum_0(0), numMin_1(0), numMin_2(0), partVector(pVector),
        vectorBegin(vBegin), k(k_), reductionType(1){}


    void reduce( const Ordinal count, const T inBuffer[], T inoutBuffer[]) const
    {
        if (reductionType == 0){
            Ordinal next=0;
            for(Ordinal ii = 0; ii < k ; ++ii){
                for (Ordinal i=0; i < numSum_0; i++, next++)
                    inoutBuffer[next] += inBuffer[next];

                for (Ordinal i=0; i < numMin_1; i++, next++)
                    if (inoutBuffer[next] < inBuffer[next])
                        inoutBuffer[next] = inBuffer[next];

                for (Ordinal i=0; i < numMin_2; i++, next++)
                    if (inoutBuffer[next] > inBuffer[next])
                        inoutBuffer[next] = inBuffer[next];
            }
        }
        else {
            Ordinal next=0;
            for(Ordinal ii = 0; ii < k ; ++ii){
                Ordinal partPartition = (*partVector)[ii + vectorBegin];
                Ordinal tnumSum_ = 2 * partPartition - 1;
                Ordinal tnumMin_1 = partPartition - 1;
                Ordinal tnumMin_2 = tnumMin_1 ;
                for (Ordinal i=0; i < tnumSum_; i++, next++)
                    inoutBuffer[next] += inBuffer[next];

                for (Ordinal i=0; i < tnumMin_1; i++, next++)
                    if (inoutBuffer[next] < inBuffer[next])
                        inoutBuffer[next] = inBuffer[next];

                for (Ordinal i=0; i < tnumMin_2; i++, next++)
                    if (inoutBuffer[next] > inBuffer[next])
                        inoutBuffer[next] = inBuffer[next];
            }
        }
    }
};


template <typename Ordinal, typename T>
class MultiJaggedCombinedMinMaxTotalReductionOp :
     public ValueTypeReductionOp<Ordinal,T>
{
private:
    Ordinal numMin, numMax, numTotal;

public:
    MultiJaggedCombinedMinMaxTotalReductionOp ():numMin(0), numMax(0), numTotal(0)
    {}

    MultiJaggedCombinedMinMaxTotalReductionOp (Ordinal nmin, Ordinal nmax, Ordinal
     nTotal): numMin(nmin), numMax(nmax), numTotal(nTotal){}

    void reduce( const Ordinal count, const T inBuffer[], T inoutBuffer[]) const
    {
        Ordinal next=0;

        for (Ordinal i=0; i < numMin; i++, next++)
            if (inoutBuffer[next] > inBuffer[next])
                inoutBuffer[next] = inBuffer[next];

        for (Ordinal i=0; i < numMax; i++, next++)
            if (inoutBuffer[next] < inBuffer[next])
                inoutBuffer[next] = inBuffer[next];


        for (Ordinal i=0; i < numTotal; i++, next++)
            inoutBuffer[next] += inBuffer[next];
    }
};
} // namespace Teuchos

#endif //_ZOLTAN2_MultiJagged_ReductionOps_HPP_