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//
// Copyright © 2017 Arm Ltd. All rights reserved.
// SPDX-License-Identifier: MIT
//
#include "Gather.hpp"
#include "RefWorkloadUtils.hpp"
#include <backendsCommon/WorkloadData.hpp>
namespace armnn
{
template <typename T>
void Gather(const TensorInfo& paramsInfo,
const TensorInfo& indicesInfo,
const TensorInfo& outputInfo,
const T* params,
const int32_t* indices,
T* output)
{
const TensorShape& paramsShape = paramsInfo.GetShape();
unsigned int paramsProduct = 1;
for (unsigned int i = 1; i < paramsInfo.GetNumDimensions(); ++i)
{
paramsProduct = paramsProduct * paramsShape[i];
}
unsigned int outIndex = 0;
for (unsigned int i = 0; i < indicesInfo.GetNumElements(); ++i)
{
unsigned int indx = boost::numeric_cast<unsigned int>(indices[i]);
BOOST_ASSERT(indices[i] >= 0 && indx < paramsShape[0]);
unsigned int startOffset = indx * paramsProduct;
unsigned int endOffset = startOffset + paramsProduct;
for (unsigned int j = startOffset; j < endOffset; ++j)
{
output[outIndex] = params[j];
++outIndex;
}
}
BOOST_ASSERT(outIndex == outputInfo.GetNumElements());
}
template void Gather<float>(const TensorInfo& paramsInfo,
const TensorInfo& indicesInfo,
const TensorInfo& outputInfo,
const float* params,
const int32_t* indices,
float* output);
template void Gather<uint8_t>(const TensorInfo& paramsInfo,
const TensorInfo& indicesInfo,
const TensorInfo& outputInfo,
const uint8_t* params,
const int32_t* indices,
uint8_t* output);
} //namespace armnn
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