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//
// Copyright © 2017 Arm Ltd and Contributors. All rights reserved.
// SPDX-License-Identifier: MIT
//
#include "GatherLayer.hpp"
#include "LayerCloneBase.hpp"
#include <armnn/TypesUtils.hpp>
#include <backendsCommon/WorkloadData.hpp>
#include <backendsCommon/WorkloadFactory.hpp>
namespace armnn
{
GatherLayer::GatherLayer(const GatherDescriptor& param, const char* name)
: LayerWithParameters(2, 1, LayerType::Gather, param, name)
{
}
std::unique_ptr<IWorkload> GatherLayer::CreateWorkload(const armnn::IWorkloadFactory& factory) const
{
GatherQueueDescriptor descriptor;
return factory.CreateGather(descriptor, PrepInfoAndDesc(descriptor));
}
GatherLayer* GatherLayer::Clone(Graph& graph) const
{
return CloneBase<GatherLayer>(graph, m_Param, GetName());
}
void GatherLayer::ValidateTensorShapesFromInputs(ShapeInferenceMethod shapeInferenceMethod)
{
VerifyLayerConnections(2, CHECK_LOCATION());
const TensorShape& outputShape = GetOutputSlot(0).GetTensorInfo().GetShape();
VerifyShapeInferenceType(outputShape, shapeInferenceMethod);
const TensorInfo& params = GetInputSlot(0).GetConnection()->GetTensorInfo();
const TensorInfo& indices = GetInputSlot(1).GetConnection()->GetTensorInfo();
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.GetShape()[i]);
}
for (unsigned int i = axis; i < indicesDim + axis; ++i)
{
dimSizes.push_back(indices.GetShape()[i - axis]);
}
for (unsigned int i = 1 + axis; i < paramsDim; ++i)
{
dimSizes.push_back(params.GetShape()[i]);
}
const TensorShape& inferredShape = TensorShape(outputDim, dimSizes.data());
ValidateAndCopyShape(outputShape, inferredShape, shapeInferenceMethod, "GatherLayer");
}
void GatherLayer::Accept(ILayerVisitor& visitor) const
{
visitor.VisitGatherLayer(this, GetParameters(), GetName());
}
} // namespace armnn
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