src/operator/contrib/reset_arrays.cc

/*
 * 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.
 */

/*!
 * \file reset_arrays.cc
 * \brief setting all array element values to zeros
 * \author Moises Hernandez-Fernandez, Andrei Ivanov
 */

#include "./reset_arrays-inl.h"

namespace mxnet {
namespace op {

DMLC_REGISTER_PARAMETER(ResetArraysParam);

NNVM_REGISTER_OP(reset_arrays)
    .describe(R"code(Set to zero multiple arrays
)code" ADD_FILELINE)
    .set_num_inputs([](const nnvm::NodeAttrs& attrs) {
      return static_cast<uint32_t>(dmlc::get<ResetArraysParam>(attrs.parsed).num_arrays);
    })
    .set_attr<nnvm::FMutateInputs>("FMutateInputs",
                                   [](const nnvm::NodeAttrs& attrs) {
                                     const uint32_t num_args =
                                         dmlc::get<ResetArraysParam>(attrs.parsed).num_arrays;
                                     std::vector<uint32_t> ret;
                                     for (uint32_t i = 0; i < num_args; ++i) {
                                       ret.push_back(i);
                                     }
                                     return ret;
                                   })
    .set_num_outputs(0)
    .set_attr_parser(ParamParser<ResetArraysParam>)
    .set_attr<mxnet::FInferShape>("FInferShape", ResetArraysShape)
    .set_attr<nnvm::FInferType>("FInferType", ResetArraysType)
    .set_attr<nnvm::FListInputNames>("FListInputNames",
                                     [](const NodeAttrs& attrs) {
                                       const uint32_t num_args =
                                           dmlc::get<ResetArraysParam>(attrs.parsed).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;
                                     })
    .add_argument("data", "NDArray-or-Symbol[]", "Arrays")
    .add_arguments(ResetArraysParam::__FIELDS__());

NNVM_REGISTER_OP(reset_arrays).set_attr<FCompute>("FCompute<cpu>", ResetArrays<cpu>);

template <>
void ResetMemory<cpu>(void* pntr, size_t len, mshadow::Stream<cpu>* s) {
  memset(pntr, 0, len);
}

}  // namespace op
}  // namespace mxnet