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65 lines
2.4 KiB
65 lines
2.4 KiB
/* Copyright (c) 2016 PaddlePaddle Authors. All Rights Reserve.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOpArgType::OUT WARRANTIES OR CONDITIONS OF ANY KOpArgType::IND, either
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express or implied. See the License for the specific language governing
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permissions and limitations under the License. */
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#include "paddle/framework/grad_op_builder.h"
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#include "paddle/framework/framework.pb.h"
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#include "paddle/framework/op_registry.h"
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namespace paddle {
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namespace framework {
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class OpRegistry;
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using VarIndexMap = std::unordered_map<std::string, int>;
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enum class OpArgType { IN, OUT };
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static void TransOpArg(const OperatorBase* src_op, OperatorBase* dst_op,
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const OpArgType& src_type, const OpArgType& dst_type,
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bool is_grad) {
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const auto& src_inout =
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src_type == OpArgType::IN ? src_op->inputs_ : src_op->outputs_;
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auto& dst_inout =
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dst_type == OpArgType::IN ? dst_op->inputs_ : dst_op->outputs_;
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const OpProto& proto = OpRegistry::protos().at(src_op->type_);
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const auto& src_arg_list =
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src_type == OpArgType::IN ? proto.inputs() : proto.outputs();
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for (const auto& arg : src_arg_list) {
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std::string src_name = arg.name();
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std::string dst_name = is_grad ? GradVarName(src_name) : src_name;
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for (auto& var_name : src_inout.at(src_name)) {
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std::string s = is_grad ? GradVarName(var_name)
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: (arg.no_gradient() ? kEmptyVarName : var_name);
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dst_inout[dst_name].emplace_back(s);
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}
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}
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}
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OperatorBase* BuildGradOp(const OperatorBase* op) {
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std::string grad_op_type = OpRegistry::grad_ops().at(op->type_);
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OperatorBase* grad_op = OpRegistry::op_creators().at(grad_op_type)();
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grad_op->type_ = grad_op_type;
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grad_op->attrs_ = op->attrs_;
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TransOpArg(op, grad_op, OpArgType::IN, OpArgType::IN, false); // I
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TransOpArg(op, grad_op, OpArgType::OUT, OpArgType::IN, false); // O
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TransOpArg(op, grad_op, OpArgType::OUT, OpArgType::IN, true); // OG
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TransOpArg(op, grad_op, OpArgType::IN, OpArgType::OUT, true); // IG
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return grad_op;
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}
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} // namespace framework
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} // namespace paddle
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