/* * 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) 2018 by Contributors * \file state_op.cc * \brief Experimental operators * Currently we only support assign */ #include <nnvm/op.h> #include <nnvm/node.h> #include <nnvm/op_attr_types.h> #include <nnvm/compiler/op_attr_types.h> #include <nnvm/top/tensor.h> #include <topi/elemwise.h> #include "../op_common.h" #include "../elemwise_op_common.h" namespace nnvm { namespace top { using namespace tvm; using namespace nnvm::compiler; NNVM_REGISTER_OP(_assign) .describe(R"doc(Assign rhs to the lhs. lhs must be a Variable. This is an experimental operator. )doc" NNVM_ADD_FILELINE) .set_num_inputs(2) .set_num_outputs(1) .set_attr<FMutateInputs>( "FMutateInputs", [](const NodeAttrs& attrs) { return std::vector<uint32_t>{0}; }) .set_attr<FTVMCompute>( "FTVMCompute", [](const NodeAttrs& attrs, const Array<Tensor>& inputs, const Array<Tensor>& out_info) { // This implementation is needed for the special // logic handling assign in the compiler // It simply copies the result of rhs the output // The later decoration in compiler will change // the memory assignment of assign to tie // the lhs to the output. return Array<Tensor>{ topi::identity(inputs[1]) }; }) .set_attr<FInferShape>("FInferShape", SameShape) .set_attr<FCorrectLayout>( "FCorrectLayout", [](const NodeAttrs& attrs, std::vector<Layout> *in_layouts, const std::vector<Layout> *last_in_layouts, std::vector<Layout> *out_layouts) { NNVM_ASSIGN_LAYOUT(*in_layouts, 1, (*in_layouts)[0]); NNVM_ASSIGN_LAYOUT(*out_layouts, 0, (*in_layouts)[0]); return true; }) .set_attr<FInplaceOption>( "FInplaceOption", [](const NodeAttrs& attrs) { return std::vector<std::pair<int, int> >{{1, 0}}; }) .set_attr<FGradient>( "FGradient", [](const NodePtr& n, const std::vector<NodeEntry>& ograds){ return std::vector<NodeEntry>{ MakeNode("zeros_like", n->attrs.name + "_zero_grad", {n->inputs[0]}), ograds[0] }; }); } // namespace top } // namespace nnvm