//*****************************************************************************
// Copyright 2017-2019 Intel Corporation
//
// 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
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//*****************************************************************************

#pragma once

#include "ngraph/pass/graph_rewrite.hpp"
#include "ngraph/runtime/cpu/cpu_backend_visibility.h"
#include "ngraph/runtime/cpu/pass/cpu_fusion.hpp"

namespace ngraph
{
    namespace runtime
    {
        namespace cpu
        {
            namespace pass
            {
                class LSTMFusion;
                class RNNFusion;
                class BiDirectionalRnn;
                class MultiLayerRNNFusion;
            }
        }
    }
}

class CPU_BACKEND_API ngraph::runtime::cpu::pass::LSTMFusion : public ngraph::pass::GraphRewrite
{
public:
    LSTMFusion()
        : GraphRewrite()
    {
        construct_sigmoid();
        construct_lstm_fprop();
    }

private:
    void construct_sigmoid();
    void construct_lstm_fprop();
};

class CPU_BACKEND_API ngraph::runtime::cpu::pass::RNNFusion
    : public ngraph::pass::RecurrentGraphRewrite
{
public:
    RNNFusion()
        : RecurrentGraphRewrite()
    {
        construct_rnn_lstm_fprop();
    }

private:
    void construct_rnn_lstm_fprop();
};

class CPU_BACKEND_API ngraph::runtime::cpu::pass::MultiLayerRNNFusion
    : public ngraph::pass::RecurrentGraphRewrite
{
public:
    MultiLayerRNNFusion()
        : RecurrentGraphRewrite()
    {
        construct_multi_layer_rnn_fusion_fprop();
    }

private:
    void construct_multi_layer_rnn_fusion_fprop();
};

class CPU_BACKEND_API ngraph::runtime::cpu::pass::BiDirectionalRnn
    : public ngraph::pass::GraphRewrite
{
public:
    BiDirectionalRnn()
        : GraphRewrite()
    {
        construct_bidirectional_rnn();
    }

private:
    void construct_bidirectional_rnn();
};
