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multi_sum_sq.cc
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multi_sum_sq.cc
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/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
/*!
* Copyright (c) 2019 by Contributors
* \file multi_sum_sq.cc
* \brief vectorized sum or squared over multiple arrays operators
* \author Clement Fuji Tsang, Andrei Ivanov, Moises Hernandez
*/
#include "./multi_sum_sq-inl.h"
namespace mxnet {
namespace op {
DMLC_REGISTER_PARAMETER(MultiSumSqParam);
NNVM_REGISTER_OP(multi_sum_sq)
.describe(R"code(Compute the sums of squares of multiple arrays
)code" ADD_FILELINE)
.set_num_inputs([](const nnvm::NodeAttrs& attrs) {
return static_cast<uint32_t>(dmlc::get<MultiSumSqParam>(attrs.parsed).num_arrays);
})
.set_num_outputs(1)
.set_attr_parser(ParamParser<MultiSumSqParam>)
.set_attr<mxnet::FInferShape>("FInferShape", MultiSumSqShape)
.set_attr<nnvm::FInferType>("FInferType", MultiSumSqType)
.set_attr<nnvm::FListInputNames>("FListInputNames",
[](const NodeAttrs& attrs) {
const auto& param = dmlc::get<MultiSumSqParam>(attrs.parsed);
const uint32_t num_args = param.num_arrays;
std::vector<std::string> ret;
for (uint32_t i = 0; i < num_args; ++i) {
ret.push_back(std::string("array_") + std::to_string(i));
}
return ret;
})
.set_attr<FCompute>("FCompute<cpu>", MultiSumSq<cpu>)
.set_attr<FResourceRequest>("FResourceRequest",
[](const NodeAttrs& attrs) {
return std::vector<ResourceRequest>{ResourceRequest::kTempSpace};
})
.add_argument("data", "NDArray-or-Symbol[]", "Arrays")
.add_arguments(MultiSumSqParam::__FIELDS__());
template<typename DType>
inline void CalcSumSq(const std::vector<TBlob> &inputs, int n_inputs,
float *out_ptr, mshadow::Stream<cpu> *s) {
int i;
size_t j;
#pragma omp parallel for private(i, j)
for (i = 0; i < n_inputs; ++i) { // array index in inputs
float sum = 0;
const auto address = inputs[i].FlatTo2D<cpu, DType>(s).dptr_;
const auto j_max = inputs[i].shape_.Size();
for (j = 0; j < j_max; ++j)
sum += address[j] * address[j];
out_ptr[i] = sum;
}
}
template<>
void MultiSumSqRun<cpu>(const std::vector<TBlob> &inputs, int n_inputs,
float *out_ptr, const OpContext &ctx) {
MSHADOW_REAL_TYPE_SWITCH(inputs[0].type_flag_, DType,
CalcSumSq<DType>(inputs, n_inputs, out_ptr, ctx.get_stream<cpu>());
)
}
} // namespace op
} // namespace mxnet