src/api/operator/numpy_extension/npx_batch_dot_op.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 npx_batch_dot_op.cc
 * \brief Implementation of the API of functions in src/operator/numpy_extension/npx_batch_dot_op.cc
 */
#include <mxnet/api_registry.h>
#include <mxnet/runtime/packed_func.h>
#include "../utils.h"
#include "../../../operator/tensor/dot-inl.h"

namespace mxnet {

inline int String2ForwardStype(const std::string& s) {
  using namespace op;
  if (s == "default") {
    return kDefaultStorage;
  } else if (s == "row_sparse") {
    return kRowSparseStorage;
  } else if (s == "csr") {
    return kCSRStorage;
  } else {
    LOG(FATAL) << "unknown forward storage type " << s;
  }
  LOG(FATAL) << "should not reach here ";
  return 0;
}

MXNET_REGISTER_API("_npx.batch_dot")
    .set_body([](runtime::MXNetArgs args, runtime::MXNetRetValue* ret) {
      using namespace runtime;
      nnvm::NodeAttrs attrs;
      const nnvm::Op* op = Op::Get("_npx_batch_dot");
      op::DotParam param = {};
      // inputs
      int num_inputs = 2;
      std::vector<NDArray*> inputs;
      inputs.reserve(num_inputs);
      for (int i = 0; i < num_inputs; ++i) {
        inputs.push_back(args[i].operator mxnet::NDArray*());
      }
      // transpose_a
      if (args[2].type_code() == kNull) {
        param.transpose_a = false;
      } else {
        param.transpose_a = args[2].operator bool();
      }
      // transpose_b
      if (args[3].type_code() == kNull) {
        param.transpose_b = false;
      } else {
        param.transpose_b = args[3].operator bool();
      }
      // forward_stype
      if (args[4].type_code() == kNull) {
        param.forward_stype = dmlc::nullopt;
      } else {
        param.forward_stype = String2ForwardStype(args[4].operator std::string());
      }
      attrs.parsed = param;
      attrs.op     = op;
      SetAttrDict<op::DotParam>(&attrs);
      int num_outputs = 1;
      auto ndoutputs  = Invoke(op, &attrs, num_inputs, inputs.data(), &num_outputs, nullptr);
      *ret            = ndoutputs[0];
    });

}  // namespace mxnet