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82 lines
2.9 KiB
82 lines
2.9 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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#include "paddle/operators/scale_op.h"
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#include "paddle/operators/net_op.h"
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namespace paddle {
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namespace operators {
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class ScaleOp : public framework::OperatorWithKernel {
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public:
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ScaleOp(const std::string &type, const framework::VariableNameMap &inputs,
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const framework::VariableNameMap &outputs,
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const framework::AttributeMap &attrs)
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: OperatorWithKernel(type, inputs, outputs, attrs) {}
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protected:
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void InferShape(framework::InferShapeContextBase *ctx) const override {
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PADDLE_ENFORCE(ctx->HasInput("X"),
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"Input(X) of ScaleOp should not be null.");
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PADDLE_ENFORCE(ctx->HasOutput("Out"),
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"Output(Out) of ScaleOp should not be null.");
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ctx->SetOutputDim("Out", ctx->GetInputDim("X"));
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ctx->ShareLoD("X", /*->*/ "Out");
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}
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};
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template <typename AttrType>
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class ScaleOpMaker : public framework::OpProtoAndCheckerMaker {
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public:
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ScaleOpMaker(framework::OpProto *proto, framework::OpAttrChecker *op_checker)
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: OpProtoAndCheckerMaker(proto, op_checker) {
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AddInput("X", "The input tensor of scale operator.").NotInGradient();
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AddOutput("Out", "The output tensor of scale operator.").NotInGradient();
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AddComment(R"DOC(Scale operator
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The equation is: Out = scale*X
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)DOC");
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AddAttr<AttrType>("scale", "The scaling factor of the scale operator.")
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.SetDefault(1.0);
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}
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};
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// The operator to calculate gradients of a scale operator is just the scale
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// operator itself.
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// Grad(Out=scale(X)) => Grad(X) = scale(Grad(Out))
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template <typename AttrType>
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class ScaleGradOp : public NetOp {
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public:
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ScaleGradOp(const std::string &type, const framework::VariableNameMap &inputs,
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const framework::VariableNameMap &outputs,
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const framework::AttributeMap &attrs)
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: NetOp(type, inputs, outputs, attrs) {
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AppendOp(framework::OpRegistry::CreateOp(
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"scale", {{"X", {Input(framework::GradVarName("Out"))}}},
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{{"Out", {Output(framework::GradVarName("X"))}}},
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{{"scale", Attr<AttrType>("scale")}}));
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CompleteAddOp(false);
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}
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};
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} // namespace operators
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} // namespace paddle
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namespace ops = paddle::operators;
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REGISTER_OP(scale, ops::ScaleOp, ops::ScaleOpMaker<float>, scale_grad,
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ops::ScaleGradOp<float>);
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REGISTER_OP_CPU_KERNEL(scale,
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ops::ScaleKernel<paddle::platform::CPUPlace, float>);
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