This layer represents a Gather operator. More...

#include <GatherLayer.hpp>

Inheritance diagram for GatherLayer:

Collaboration diagram for GatherLayer:

Public Member Functions
virtual std::unique_ptr< IWorkload >	CreateWorkload (const IWorkloadFactory &factory) const override
	Makes a workload for the Gather type. More...

GatherLayer *	Clone (Graph &graph) const override
	Creates a dynamically-allocated copy of this layer. More...

std::vector< TensorShape >	InferOutputShapes (const std::vector< TensorShape > &inputShapes) const override
	Infers the output shapes from given input shapes and layer properties. More...

void	ValidateTensorShapesFromInputs () override
	Check if the input tensor shape(s). More...

void	ExecuteStrategy (IStrategy &strategy) const override
	Apply a visitor to this layer. More...

Public Member Functions inherited from LayerWithParameters< GatherDescriptor >
const GatherDescriptor &	GetParameters () const override
	If the layer has a descriptor return it. More...

void	SerializeLayerParameters (ParameterStringifyFunction &fn) const override
	Helper to serialize the layer parameters to string (currently used in DotSerializer and company). More...

Public Member Functions inherited from Layer
	Layer (unsigned int numInputSlots, unsigned int numOutputSlots, LayerType type, const char *name)

	Layer (unsigned int numInputSlots, unsigned int numOutputSlots, LayerType type, DataLayout layout, const char *name)

const std::string &	GetNameStr () const

const OutputHandler &	GetOutputHandler (unsigned int i=0) const

OutputHandler &	GetOutputHandler (unsigned int i=0)

ShapeInferenceMethod	GetShapeInferenceMethod () const

bool	GetAllowExpandedDims () const

const std::vector< InputSlot > &	GetInputSlots () const

const std::vector< OutputSlot > &	GetOutputSlots () const

std::vector< InputSlot >::iterator	BeginInputSlots ()

std::vector< InputSlot >::iterator	EndInputSlots ()

std::vector< OutputSlot >::iterator	BeginOutputSlots ()

std::vector< OutputSlot >::iterator	EndOutputSlots ()

bool	IsOutputUnconnected ()

void	ResetPriority () const

LayerPriority	GetPriority () const

LayerType	GetType () const override
	Returns the armnn::LayerType of this layer. More...

DataType	GetDataType () const

const BackendId &	GetBackendId () const

void	SetBackendId (const BackendId &id) override
	Set the backend of the IConnectableLayer. More...

virtual void	CreateTensorHandles (const TensorHandleFactoryRegistry &registry, const IWorkloadFactory &factory, const bool IsMemoryManaged=true)

void	VerifyLayerConnections (unsigned int expectedConnections, const CheckLocation &location) const

virtual void	ReleaseConstantData ()

template<typename Op >
void	OperateOnConstantTensors (Op op)

const char *	GetName () const override
	Returns the name of the layer. More...

unsigned int	GetNumInputSlots () const override
	Returns the number of connectable input slots. More...

unsigned int	GetNumOutputSlots () const override
	Returns the number of connectable output slots. More...

const InputSlot &	GetInputSlot (unsigned int index) const override
	Get a const input slot handle by slot index. More...

InputSlot &	GetInputSlot (unsigned int index) override
	Get the input slot handle by slot index. More...

const OutputSlot &	GetOutputSlot (unsigned int index=0) const override
	Get the const output slot handle by slot index. More...

OutputSlot &	GetOutputSlot (unsigned int index=0) override
	Get the output slot handle by slot index. More...

void	SetGuid (LayerGuid guid)

LayerGuid	GetGuid () const final
	Returns the unique id of the layer. More...

void	AddRelatedLayerName (const std::string layerName)

const std::list< std::string > &	GetRelatedLayerNames ()

virtual void	Reparent (Graph &dest, std::list< Layer * >::const_iterator iterator)=0

void	BackendSelectionHint (Optional< BackendId > backend) final
	Provide a hint for the optimizer as to which backend to prefer for this layer. More...

Optional< BackendId >	GetBackendHint () const

void	SetShapeInferenceMethod (ShapeInferenceMethod shapeInferenceMethod)

void	SetAllowExpandedDims (bool allowExpandedDims)

template<typename T >
std::shared_ptr< T >	GetAdditionalInformation () const

void	SetAdditionalInfoForObject (const AdditionalInfoObjectPtr &additionalInfo)

virtual const BaseDescriptor &	GetParameters () const override
	If the layer has a descriptor return it. More...

Protected Member Functions
	GatherLayer (const GatherDescriptor &param, const char *name)
	Constructor to create a GatherLayer. More...

	~GatherLayer ()=default
	Default destructor. More...

Protected Member Functions inherited from LayerWithParameters< GatherDescriptor >
	LayerWithParameters (unsigned int numInputSlots, unsigned int numOutputSlots, LayerType type, const GatherDescriptor &param, const char *name)

	~LayerWithParameters ()=default

WorkloadInfo	PrepInfoAndDesc (QueueDescriptor &descriptor) const
	Helper function to reduce duplication in *Layer::CreateWorkload. More...

void	ExecuteStrategy (IStrategy &strategy) const override
	Apply a visitor to this layer. More...

Layer::ImmutableConstantTensors	GetConnectedConstantAsInputTensors () const

Protected Member Functions inherited from Layer
virtual	~Layer ()=default

template<typename QueueDescriptor >
void	CollectQueueDescriptorInputs (QueueDescriptor &descriptor, WorkloadInfo &info) const

template<typename QueueDescriptor >
void	CollectQueueDescriptorOutputs (QueueDescriptor &descriptor, WorkloadInfo &info) const

void	ValidateAndCopyShape (const TensorShape &outputShape, const TensorShape &inferredShape, const ShapeInferenceMethod shapeInferenceMethod, const std::string &layerName, const unsigned int outputSlotIndex=0)

void	VerifyShapeInferenceType (const TensorShape &outputShape, ShapeInferenceMethod shapeInferenceMethod)

template<typename QueueDescriptor >
WorkloadInfo	PrepInfoAndDesc (QueueDescriptor &descriptor) const
	Helper function to reduce duplication in *Layer::CreateWorkload. More...

template<typename LayerType , typename ... Params>
LayerType *	CloneBase (Graph &graph, Params &&... params) const

virtual ConstantTensors	GetConstantTensorsByRef () override final

virtual ImmutableConstantTensors	GetConstantTensorsByRef () const override

void	SetAdditionalInfo (QueueDescriptor &descriptor) const

Protected Member Functions inherited from IConnectableLayer
	~IConnectableLayer ()
	Objects are not deletable via the handle. More...

Additional Inherited Members
Public Types inherited from LayerWithParameters< GatherDescriptor >
using	DescriptorType = GatherDescriptor

Public Types inherited from IConnectableLayer
using	ConstantTensors = std::vector< std::reference_wrapper< std::shared_ptr< ConstTensorHandle > >>

using	ImmutableConstantTensors = std::vector< std::reference_wrapper< const std::shared_ptr< ConstTensorHandle > >>

Protected Attributes inherited from LayerWithParameters< GatherDescriptor >
GatherDescriptor	m_Param
	The parameters for the layer (not including tensor-valued weights etc.). More...

Protected Attributes inherited from Layer
AdditionalInfoObjectPtr	m_AdditionalInfoObject

std::vector< OutputHandler >	m_OutputHandlers

ShapeInferenceMethod	m_ShapeInferenceMethod

Detailed Description

This layer represents a Gather operator.

Definition at line 14 of file GatherLayer.hpp.

Constructor & Destructor Documentation

◆ GatherLayer()

GatherLayer	(	const GatherDescriptor &	param,
		const char *	name
	)

protected

Constructor to create a GatherLayer.

Parameters

[in]	param	GatherDescriptor to configure the stack operation.
[in]	name	Optional name for the layer.

Definition at line 16 of file GatherLayer.cpp.

     : LayerWithParameters(2, 1, LayerType::Gather, param, name)
 {
 }

◆ ~GatherLayer()

~GatherLayer ( )

protecteddefault

Default destructor.

Member Function Documentation

◆ Clone()

GatherLayer * Clone ( Graph & graph ) const

overridevirtual

Creates a dynamically-allocated copy of this layer.

Parameters

[in] graph The graph into which this layer is being cloned.

Implements Layer.

Definition at line 29 of file GatherLayer.cpp.

 {
     return CloneBase<GatherLayer>(graph, m_Param, GetName());
 }

References Layer::GetName(), and LayerWithParameters< GatherDescriptor >::m_Param.

◆ CreateWorkload()

std::unique_ptr< IWorkload > CreateWorkload ( const IWorkloadFactory & factory ) const

overridevirtual

Makes a workload for the Gather type.

Parameters

[in]	graph	The graph where this layer can be found.
[in]	factory	The workload factory which will create the workload.

Returns: A pointer to the created workload, or nullptr if not created.

Implements Layer.

Definition at line 21 of file GatherLayer.cpp.

 {
     GatherQueueDescriptor descriptor;
     SetAdditionalInfo(descriptor);
  
     return factory.CreateWorkload(LayerType::Gather, descriptor, PrepInfoAndDesc(descriptor));
 }

References IWorkloadFactory::CreateWorkload(), armnn::Gather, LayerWithParameters< GatherDescriptor >::PrepInfoAndDesc(), and Layer::SetAdditionalInfo().

◆ ExecuteStrategy()

void ExecuteStrategy ( IStrategy & strategy ) const

overridevirtual

Apply a visitor to this layer.

Reimplemented from Layer.

Definition at line 107 of file GatherLayer.cpp.

 {
     strategy.ExecuteStrategy(this, GetParameters(), {}, GetName());
 }

References IStrategy::ExecuteStrategy(), Layer::GetName(), and LayerWithParameters< GatherDescriptor >::GetParameters().

◆ InferOutputShapes()

std::vector< TensorShape > InferOutputShapes ( const std::vector< TensorShape > & inputShapes ) const

overridevirtual

Infers the output shapes from given input shapes and layer properties.

Parameters

[in] inputShapes The input shapes layer has.

Returns: A vector to the inferred output shape.

Reimplemented from Layer.

Definition at line 34 of file GatherLayer.cpp.

 {
     if (inputShapes.size() != 2)
     {
         throw armnn::Exception("inputShapes' size is \"" + std::to_string(inputShapes.size()) +
                                "\" - should be \"2\".");
     }
  
     const TensorShape& params = inputShapes[0];
     const TensorShape& indices = inputShapes[1];
  
     if (indices.GetDimensionality() == Dimensionality::Scalar && indices.GetNumDimensions() == 1)
     {
          return std::vector<TensorShape>({ TensorShape(Dimensionality::Scalar)});
     }
  
     const unsigned int paramsDim = params.GetNumDimensions();
     const unsigned int indicesDim = indices.GetNumDimensions();
     const unsigned int outputDim = paramsDim - 1 + indicesDim;
  
     std::vector<unsigned int> dimSizes;
  
     unsigned int axis = static_cast<unsigned int>(m_Param.m_Axis);
     if (m_Param.m_Axis < 0)
     {
         int32_t  axis_aux = static_cast<int32_t>(paramsDim) + m_Param.m_Axis;
         axis = static_cast<unsigned int> (axis_aux);
     }
  
     for (unsigned int i = 0; i < axis; ++i)
     {
         dimSizes.push_back(params[i]);
     }
     for (unsigned int i = axis; i < indicesDim + axis; ++i)
     {
         dimSizes.push_back(indices[i - axis]);
     }
     for (unsigned int i = 1 + axis; i < paramsDim; ++i)
     {
         dimSizes.push_back(params[i]);
     }
  
     return std::vector<TensorShape>({ TensorShape({outputDim, dimSizes.data()})});
 }

References TensorShape::GetDimensionality(), TensorShape::GetNumDimensions(), GatherDescriptor::m_Axis, LayerWithParameters< GatherDescriptor >::m_Param, and armnn::Scalar.

Referenced by GatherLayer::ValidateTensorShapesFromInputs().

◆ ValidateTensorShapesFromInputs()

void ValidateTensorShapesFromInputs ( )

overridevirtual

Check if the input tensor shape(s).

will lead to a valid configuration of GatherLayer.

Parameters

[in] shapeInferenceMethod Indicates if output shape shall be overwritten or just validate.

Implements Layer.

Definition at line 79 of file GatherLayer.cpp.

 {
     VerifyLayerConnections(2, CHECK_LOCATION());
  
     const TensorShape& outputShape = GetOutputSlot(0).GetTensorInfo().GetShape();
  
     VerifyShapeInferenceType(outputShape, m_ShapeInferenceMethod);
  
     std::vector<TensorShape> inferredShapes = InferOutputShapes(
             {GetInputSlot(0).GetTensorInfo().GetShape(),
              GetInputSlot(1).GetTensorInfo().GetShape()});
  
     if (inferredShapes.size() != 1)
     {
         throw armnn::LayerValidationException("inferredShapes has "
                                               + std::to_string(inferredShapes.size()) +
                                               " elements - should only have 1.");
     }
  
     if (inferredShapes[0].GetDimensionality() != Dimensionality::Specified &&
         inferredShapes[0].GetDimensionality() != Dimensionality::Scalar)
     {
         throw armnn::LayerValidationException("inferredShapes' dimensionality is neither specified nor scalar.");
     }
  
     ValidateAndCopyShape(outputShape, inferredShapes[0], m_ShapeInferenceMethod, "GatherLayer");
 }

References CHECK_LOCATION, Layer::GetInputSlot(), Layer::GetOutputSlot(), TensorInfo::GetShape(), InputSlot::GetTensorInfo(), OutputSlot::GetTensorInfo(), GatherLayer::InferOutputShapes(), Layer::m_ShapeInferenceMethod, armnn::Scalar, armnn::Specified, Layer::ValidateAndCopyShape(), Layer::VerifyLayerConnections(), and Layer::VerifyShapeInferenceType().

The documentation for this class was generated from the following files:

src/armnn/layers/GatherLayer.hpp
src/armnn/layers/GatherLayer.cpp

Public Member Functions

Protected Member Functions

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ GatherLayer()

◆ ~GatherLayer()

Member Function Documentation

◆ Clone()

◆ CreateWorkload()

◆ ExecuteStrategy()

◆ InferOutputShapes()

◆ ValidateTensorShapesFromInputs()