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73 lines
2.4 KiB
73 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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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/gather_op.h"
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#include "paddle/framework/ddim.h"
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namespace paddle {
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namespace operators {
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class GatherOp : public framework::OperatorWithKernel {
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public:
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using framework::OperatorWithKernel::OperatorWithKernel;
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protected:
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void InferShape(const framework::InferShapeContext &ctx) const override {
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int batch_size = ctx.Input<Tensor>("Index")->dims()[0];
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PADDLE_ENFORCE_GE(batch_size, 0, "Batch size must be >0");
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framework::DDim output_dims(ctx.Input<Tensor>("X")->dims());
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output_dims[0] = batch_size;
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ctx.Output<Tensor>("Out")->Resize(output_dims);
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}
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};
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class GatherGradOp : public framework::OperatorWithKernel {
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public:
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using framework::OperatorWithKernel::OperatorWithKernel;
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protected:
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void InferShape(const framework::InferShapeContext &ctx) const override {
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auto X_grad = ctx.Output<Tensor>(framework::GradVarName("X"));
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auto X = ctx.Input<Tensor>("X");
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X_grad->Resize(X->dims());
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}
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};
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class GatherOpMaker : public framework::OpProtoAndCheckerMaker {
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public:
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GatherOpMaker(framework::OpProto *proto, framework::OpAttrChecker *op_checker)
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: OpProtoAndCheckerMaker(proto, op_checker) {
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AddInput("X", "The source input of gather op");
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AddInput("Index", "The index input of gather op");
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AddOutput("Out", "The output of add op");
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AddComment(R"DOC(
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Gather Operator by selecting from the first axis,
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Out = X[Index]
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)DOC");
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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(gather, ops::GatherOp, ops::GatherOpMaker, gather_grad,
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ops::GatherGradOp);
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REGISTER_OP_CPU_KERNEL(gather,
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ops::GatherOpKernel<paddle::platform::CPUPlace, float>);
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REGISTER_OP_CPU_KERNEL(
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gather_grad,
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ops::GatherGradientOpKernel<paddle::platform::CPUPlace, float>);
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