sgd_op.cc 1.9 KB
Newer Older
Q
Qiao Longfei 已提交
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19
/* Copyright (c) 2016 PaddlePaddle Authors. All Rights Reserve.

Licensed 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. */

#include "paddle/operators/sgd_op.h"

namespace paddle {
namespace operators {

D
dongzhihong 已提交
20
class SGDOp : public framework::OperatorWithKernel {
Y
Yu Yang 已提交
21 22 23
 public:
  using framework::OperatorWithKernel::OperatorWithKernel;

24
 protected:
D
dongzhihong 已提交
25
  void InferShape(const framework::InferShapeContext &ctx) const override {
26 27 28 29 30
    PADDLE_ENFORCE_EQ(ctx.Input<Tensor>("param")->dims(),
                      ctx.Input<Tensor>("grad")->dims(),
                      "Two input of SGD Op's dimension must be same.");
    ctx.Output<framework::LoDTensor>("param_out")
        ->Resize(ctx.Input<Tensor>("param")->dims());
Q
Qiao Longfei 已提交
31 32 33
  }
};

D
dongzhihong 已提交
34
class SGDOpMaker : public framework::OpProtoAndCheckerMaker {
35
 public:
D
dongzhihong 已提交
36
  SGDOpMaker(framework::OpProto *proto, framework::OpAttrChecker *op_checker)
37
      : OpProtoAndCheckerMaker(proto, op_checker) {
Q
Qiao Longfei 已提交
38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53
    AddInput("param", "input parameter");
    AddInput("grad", "input gradient");
    AddOutput("param_out", "output parameter");
    AddAttr<float>("learning_rate", "learning rate of sgd");
    AddComment(R"DOC(

Simplest sgd algorithm.

param_out = param - learning_rate * grad;

)DOC");
  }
};
}  // namespace operators
}  // namespace paddle

D
dongzhihong 已提交
54
namespace ops = paddle::operators;
F
fengjiayi 已提交
55
REGISTER_OP_WITHOUT_GRADIENT(sgd, ops::SGDOp, ops::SGDOpMaker);
D
dongzhihong 已提交
56 57
REGISTER_OP_CPU_KERNEL(sgd,
                       ops::SGDOpKernel<paddle::platform::CPUPlace, float>);