1 // 2 // Copyright © 2017 Arm Ltd and Contributors. All rights reserved. 3 // SPDX-License-Identifier: MIT 4 // 5 #pragma once 6 7 #include "LayerWithParameters.hpp" 8 #include "LstmParameters.hpp" 9 10 namespace armnn 11 { 12 13 class ScopedTensorHandle; 14 15 /// This layer represents a LSTM operation. 16 class LstmLayer : public LayerWithParameters<LstmDescriptor> 17 { 18 public: 19 20 LstmBasicParameters m_BasicParameters; 21 LstmOptCifgParameters m_CifgParameters; 22 LstmOptProjectionParameters m_ProjectionParameters; 23 LstmOptPeepholeParameters m_PeepholeParameters; 24 LstmOptLayerNormParameters m_LayerNormParameters; 25 26 /// Makes a workload for the LSTM type. 27 /// @param [in] graph The graph where this layer can be found. 28 /// @param [in] factory The workload factory which will create the workload. 29 /// @return A pointer to the created workload, or nullptr if not created. 30 virtual std::unique_ptr<IWorkload> CreateWorkload(const IWorkloadFactory& factory) const override; 31 32 /// Creates a dynamically-allocated copy of this layer. 33 /// @param [in] graph The graph into which this layer is being cloned. 34 LstmLayer* Clone(Graph& graph) const override; 35 36 /// Check if the input tensor shape(s) 37 /// will lead to a valid configuration of @ref LstmLayer. 38 /// @param [in] shapeInferenceMethod Indicates if output shape shall be overwritten or just validated. 39 void ValidateTensorShapesFromInputs() override; 40 41 /// By default returns inputShapes if the number of inputs are equal to number of outputs, 42 /// otherwise infers the output shapes from given input shapes and layer properties. 43 /// @param [in] inputShapes The input shapes layer has. 44 /// @return A vector to the inferred output shape. 45 std::vector<TensorShape> InferOutputShapes(const std::vector<TensorShape>& inputShapes) const override; 46 47 void ExecuteStrategy(IStrategy& strategy) const override; 48 49 protected: 50 /// Constructor to create a LstmLayer. 51 /// @param [in] param LstmDescriptor to configure the lstm operation. 52 /// @param [in] name Optional name for the layer. 53 LstmLayer(const LstmDescriptor& param, const char* name); 54 55 /// Default destructor 56 ~LstmLayer() = default; 57 58 /// Retrieve the handles to the constant values stored by the layer. 59 /// @return A vector of the constant tensors stored by this layer. 60 Layer::ImmutableConstantTensors GetConstantTensorsByRef() const override; 61 }; 62 63 } // namespace 64