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120 lines
3.4 KiB
120 lines
3.4 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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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<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> InputParamNames() const {
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return this->fwd_op_.InputParamNames();
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}
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std::vector<std::string> OutputParamNames() const {
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return this->fwd_op_.OutputParamNames();
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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<OpDescBind> operator()() const { return {this->Apply()}; }
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protected:
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virtual 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 OpDescBind Apply() const {
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OpDescBind grad;
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grad.SetType(this->GradOpType());
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for (auto& input_param : this->InputParamNames()) {
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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->OutputParamNames()) {
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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 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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