src/backends/neon/workloads/NeonLstmFloatWorkload.hpp

//
// Copyright © 2017 Arm Ltd. All rights reserved.
// SPDX-License-Identifier: MIT
//

#pragma once

#include <backends/Workload.hpp>
#include <backends/WorkloadData.hpp>

#include "arm_compute/graph/Tensor.h"
#include "arm_compute/runtime/NEON/functions/NELSTMLayer.h"

namespace armnn
{

class NeonLstmFloatWorkload : public FloatWorkload<LstmQueueDescriptor>
{
public:
    NeonLstmFloatWorkload(const LstmQueueDescriptor& descriptor, const WorkloadInfo& info);
    virtual void Execute() const override;

private:
    mutable arm_compute::NELSTMLayer m_LstmLayer;

    std::unique_ptr<arm_compute::Tensor> m_InputToInputWeightsTensor;
    std::unique_ptr<arm_compute::Tensor> m_InputToForgetWeightsTensor;
    std::unique_ptr<arm_compute::Tensor> m_InputToCellWeightsTensor;
    std::unique_ptr<arm_compute::Tensor> m_InputToOutputWeightsTensor;
    std::unique_ptr<arm_compute::Tensor> m_RecurrentToInputWeightsTensor;
    std::unique_ptr<arm_compute::Tensor> m_RecurrentToForgetWeightsTensor;
    std::unique_ptr<arm_compute::Tensor> m_RecurrentToCellWeightsTensor;
    std::unique_ptr<arm_compute::Tensor> m_RecurrentToOutputWeightsTensor;
    std::unique_ptr<arm_compute::Tensor> m_CellToInputWeightsTensor;
    std::unique_ptr<arm_compute::Tensor> m_CellToForgetWeightsTensor;
    std::unique_ptr<arm_compute::Tensor> m_CellToOutputWeightsTensor;
    std::unique_ptr<arm_compute::Tensor> m_InputGateBiasTensor;
    std::unique_ptr<arm_compute::Tensor> m_ForgetGateBiasTensor;
    std::unique_ptr<arm_compute::Tensor> m_CellBiasTensor;
    std::unique_ptr<arm_compute::Tensor> m_OutputGateBiasTensor;
    std::unique_ptr<arm_compute::Tensor> m_ProjectionWeightsTensor;
    std::unique_ptr<arm_compute::Tensor> m_ProjectionBiasTensor;

    std::unique_ptr<arm_compute::Tensor> m_ScratchBuffer;

    void FreeUnusedTensors();
};

arm_compute::Status NeonLstmFloatWorkloadValidate(const TensorInfo& input, const TensorInfo& outputStateIn,
                                                  const TensorInfo& cellStateIn, const TensorInfo& scratchBuffer,
                                                  const TensorInfo& outputStateOut, const TensorInfo& cellStateOut,
                                                  const TensorInfo& output, const LstmDescriptor &descriptor,
                                                  const TensorInfo& inputToForgetWeights,
                                                  const TensorInfo& inputToCellWeights,
                                                  const TensorInfo& inputToOutputWeights,
                                                  const TensorInfo& recurrentToForgetWeights,
                                                  const TensorInfo& recurrentToCellWeights,
                                                  const TensorInfo& recurrentToOutputWeights,
                                                  const TensorInfo& forgetGateBias, const TensorInfo& cellBias,
                                                  const TensorInfo& outputGateBias,
                                                  const TensorInfo* inputToInputWeights,
                                                  const TensorInfo* recurrentToInputWeights,
                                                  const TensorInfo* cellToInputWeights,
                                                  const TensorInfo* inputGateBias,
                                                  const TensorInfo* projectionWeights,
                                                  const TensorInfo* projectionBias,
                                                  const TensorInfo* cellToForgetWeights,
                                                  const TensorInfo* cellToOutputWeights);

} //namespace armnn