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125 lines
3.6 KiB
125 lines
3.6 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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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License. */
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#pragma once
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#include "paddle/framework/op_desc.h"
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#include "paddle/framework/operator.h"
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namespace paddle {
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namespace framework {
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class GradOpDescMakerBase {
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public:
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explicit GradOpDescMakerBase(const OpDescBind& fwd_op) : fwd_op_(fwd_op) {}
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virtual ~GradOpDescMakerBase() = default;
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virtual std::vector<std::unique_ptr<OpDescBind>> operator()() const = 0;
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protected:
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static std::vector<std::string> ToGradNames(
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const std::vector<std::string>& var_names) {
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std::vector<std::string> ret_val;
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ret_val.reserve(var_names.size());
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std::transform(var_names.begin(), var_names.end(),
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std::back_inserter(ret_val), GradVarName);
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return ret_val;
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}
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std::vector<std::string> InputGrad(const std::string& name) const {
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return ToGradNames(fwd_op_.Input(name));
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}
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std::vector<std::string> OutputGrad(const std::string& name) const {
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return ToGradNames(fwd_op_.Output(name));
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}
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std::vector<std::string> InputNames() const {
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return this->fwd_op_.InputNames();
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}
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std::vector<std::string> OutputNames() const {
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return this->fwd_op_.OutputNames();
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}
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std::vector<std::string> Input(const std::string& name) const {
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return fwd_op_.Input(name);
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}
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std::vector<std::string> Output(const std::string& name) const {
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return fwd_op_.Output(name);
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}
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const std::unordered_map<std::string, Attribute>& Attrs() const {
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return fwd_op_.GetAttrMap();
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}
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const Attribute& GetAttr(const std::string& name) const {
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auto& map = fwd_op_.GetAttrMap();
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auto it = map.find(name);
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PADDLE_ENFORCE(it != map.end(), "Cannot find attribute %s", name);
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return it->second;
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}
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std::string ForwardOpType() const { return this->fwd_op_.Type(); }
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private:
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const OpDescBind& fwd_op_;
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};
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class SingleGradOpDescMaker : public GradOpDescMakerBase {
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public:
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using GradOpDescMakerBase::GradOpDescMakerBase;
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std::vector<std::unique_ptr<OpDescBind>> operator()() const {
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std::vector<std::unique_ptr<OpDescBind>> retv;
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retv.emplace_back(this->Apply());
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return retv;
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}
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protected:
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virtual std::unique_ptr<OpDescBind> Apply() const = 0;
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};
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class DefaultGradOpDescMaker : public SingleGradOpDescMaker {
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public:
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using SingleGradOpDescMaker::SingleGradOpDescMaker;
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protected:
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virtual std::unique_ptr<OpDescBind> Apply() const {
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auto* grad = new OpDescBind();
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grad->SetType(this->GradOpType());
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for (auto& input_param : this->InputNames()) {
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grad->SetInput(input_param, this->Input(input_param));
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grad->SetOutput(GradVarName(input_param), this->InputGrad(input_param));
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}
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for (auto& output_param : this->OutputNames()) {
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grad->SetInput(output_param, this->Output(output_param));
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grad->SetInput(GradVarName(output_param), this->OutputGrad(output_param));
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}
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grad->SetAttrMap(this->Attrs());
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return std::unique_ptr<OpDescBind>(grad);
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}
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virtual std::string GradOpType() const {
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return this->ForwardOpType() + "_grad";
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}
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};
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} // namespace framework
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} // namespace paddle
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