nnet-precondition.h

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// nnet2/nnet-precondition.h

// Copyright 2012   Johns Hopkins University (author: Daniel Povey)

// See ../../COPYING for clarification regarding multiple authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//  http://www.apache.org/licenses/LICENSE-2.0
//
// THIS CODE IS PROVIDED *AS IS* BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED
// WARRANTIES OR CONDITIONS OF TITLE, FITNESS FOR A PARTICULAR PURPOSE,
// MERCHANTABLITY OR NON-INFRINGEMENT.
// See the Apache 2 License for the specific language governing permissions and
// limitations under the License.

#ifndef KALDI_NNET2_NNET_PRECONDITION_H_
#define KALDI_NNET2_NNET_PRECONDITION_H_

#include "base/kaldi-common.h"
#include "matrix/matrix-lib.h"
#include "cudamatrix/cu-matrix-lib.h"

#include <iostream>

namespace kaldi {
namespace nnet2 {


void PreconditionDirections(const CuMatrixBase<BaseFloat> &R,
                            double lambda,
                            CuMatrixBase<BaseFloat> *P);

void PreconditionDirectionsAlpha(
    const CuMatrixBase<BaseFloat> &R,
    double alpha,
    CuMatrixBase<BaseFloat> *P);

void PreconditionDirectionsAlphaRescaled(
    const CuMatrixBase<BaseFloat> &R,
    double alpha,
    CuMatrixBase<BaseFloat> *P);
  
                           

} // namespace nnet2
} // namespace kaldi


#endif