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Diffstat (limited to 'src/backends/reference/workloads/Slice.cpp')
-rw-r--r-- | src/backends/reference/workloads/Slice.cpp | 95 |
1 files changed, 95 insertions, 0 deletions
diff --git a/src/backends/reference/workloads/Slice.cpp b/src/backends/reference/workloads/Slice.cpp new file mode 100644 index 0000000000..c7ca3b156e --- /dev/null +++ b/src/backends/reference/workloads/Slice.cpp @@ -0,0 +1,95 @@ +// +// Copyright © 2019 Arm Ltd. All rights reserved. +// SPDX-License-Identifier: MIT +// + +#include "Slice.hpp" + +#include <boost/assert.hpp> +#include <boost/core/ignore_unused.hpp> +#include <boost/numeric/conversion/cast.hpp> + +namespace armnn +{ + +void Slice(const TensorInfo& inputInfo, + const SliceDescriptor& descriptor, + const void* inputData, + void* outputData, + unsigned int dataTypeSize) +{ + const TensorShape& inputShape = inputInfo.GetShape(); + const unsigned int numDims = inputShape.GetNumDimensions(); + + BOOST_ASSERT(descriptor.m_Begin.size() == numDims); + BOOST_ASSERT(descriptor.m_Size.size() == numDims); + + constexpr unsigned int maxNumDims = 4; + BOOST_ASSERT(numDims <= maxNumDims); + + std::vector<unsigned int> paddedInput(4); + std::vector<unsigned int> paddedBegin(4); + std::vector<unsigned int> paddedSize (4); + + const unsigned int numPaddingDims = maxNumDims - numDims; + for (unsigned int i = 0u; i < maxNumDims; ++i) + { + if (i < numPaddingDims) + { + paddedInput[i] = 1u; + paddedBegin[i] = 0u; + paddedSize[i] = 1u; + } + else + { + const unsigned int j = i - numPaddingDims; + paddedInput[i] = inputShape[j]; + paddedBegin[i] = descriptor.m_Begin[j]; + paddedSize[i] = descriptor.m_Size[j]; + } + } + + unsigned int dim0 = paddedInput[0]; + unsigned int dim1 = paddedInput[1]; + unsigned int dim2 = paddedInput[2]; + unsigned int dim3 = paddedInput[3]; + + unsigned int begin0 = paddedBegin[0]; + unsigned int begin1 = paddedBegin[1]; + unsigned int begin2 = paddedBegin[2]; + unsigned int begin3 = paddedBegin[3]; + + unsigned int size0 = paddedSize[0]; + unsigned int size1 = paddedSize[1]; + unsigned int size2 = paddedSize[2]; + unsigned int size3 = paddedSize[3]; + + BOOST_ASSERT(begin0 + size0 <= dim0); + BOOST_ASSERT(begin1 + size1 <= dim1); + BOOST_ASSERT(begin2 + size2 <= dim2); + BOOST_ASSERT(begin3 + size3 <= dim3); + + const unsigned char* input = reinterpret_cast<const unsigned char*>(inputData); + unsigned char* output = reinterpret_cast<unsigned char*>(outputData); + + boost::ignore_unused(dim0); + for (unsigned int idx0 = begin0; idx0 < begin0 + size0; ++idx0) + { + for (unsigned int idx1 = begin1; idx1 < begin1 + size1; ++idx1) + { + for (unsigned int idx2 = begin2; idx2 < begin2 + size2; ++idx2) + { + for (unsigned int idx3 = begin3; idx3 < begin3 + size3; ++idx3) + { + const unsigned int inputOffset = + (((idx0 * dim1 + idx1) * dim2 + idx2) * dim3 + idx3) * dataTypeSize; + + ::memcpy(output, input + inputOffset, dataTypeSize); + output += dataTypeSize; + } + } + } + } +} + +} // namespace armnn |