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Diffstat (limited to 'src/backends/RefWorkloads/Merger.hpp')
-rw-r--r-- | src/backends/RefWorkloads/Merger.hpp | 82 |
1 files changed, 82 insertions, 0 deletions
diff --git a/src/backends/RefWorkloads/Merger.hpp b/src/backends/RefWorkloads/Merger.hpp new file mode 100644 index 0000000000..867925faa2 --- /dev/null +++ b/src/backends/RefWorkloads/Merger.hpp @@ -0,0 +1,82 @@ +// +// Copyright © 2017 Arm Ltd. All rights reserved. +// SPDX-License-Identifier: MIT +// + +#pragma once + +#include "RefWorkloadUtils.hpp" + +#include "backends/WorkloadData.hpp" + +#include <armnn/Tensor.hpp> + +namespace armnn +{ + +template <typename DataType> +void Merger(const MergerQueueDescriptor& data) +{ + const TensorInfo& outputInfo0 = GetTensorInfo(data.m_Outputs[0]); + + for (unsigned int index = 0 ; index < outputInfo0.GetNumElements(); ++index) + { + unsigned int indices[MaxNumOfTensorDimensions] = { 0 }; + + unsigned int indexRemainder = index; + unsigned int dimensionStride = outputInfo0.GetNumElements(); + + for (unsigned int i=0; i<outputInfo0.GetNumDimensions(); i++) + { + dimensionStride /= outputInfo0.GetShape()[i]; + indices[i] = indexRemainder / dimensionStride; // Use integer division to round down. + indexRemainder -= indices[i] * dimensionStride; + } + + for (unsigned int viewIdx = 0; viewIdx < data.m_ViewOrigins.size(); ++viewIdx) + { + MergerQueueDescriptor::ViewOrigin const& view = data.m_ViewOrigins[viewIdx]; + + //Split view extents are defined by the size of (the corresponding) input tensor. + const TensorInfo& inputInfo = GetTensorInfo(data.m_Inputs[viewIdx]); + BOOST_ASSERT(inputInfo.GetNumDimensions() == outputInfo0.GetNumDimensions()); + + // Check all dimensions to see if this element is inside the given input view. + bool insideView = true; + for (unsigned int i=0; i<inputInfo.GetNumDimensions(); i++) + { + if (indices[i] < view.m_Origin[i]) + { + insideView = false; + } + if (indices[i] >= view.m_Origin[i] + inputInfo.GetShape()[i]) + { + insideView = false; + } + } + + if (insideView) + { + unsigned int inIndex = 0; + unsigned int dimensionStride = 1; + + for (unsigned int i = inputInfo.GetNumDimensions(); i-- > 0;) + { + inIndex += dimensionStride * (indices[i] - view.m_Origin[i]); + dimensionStride *= inputInfo.GetShape()[i]; + } + + //We are within the view, copy input data to the output corresponding to this view. + (GetOutputTensorData<DataType>(0, data))[index] = + (GetInputTensorData<DataType>(viewIdx, data))[inIndex]; + + //What should we do if input views overlap on the output tensor? + //We could error, take the average, or shm else... + //For now just stop after finding first view (input) that matches. + break; + } + } + } +} + +} //namespace armnn |