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122 lines
4.0 KiB
122 lines
4.0 KiB
/* Copyright (c) 2020 PaddlePaddle Authors. All Rights Reserved.
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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/fluid/operators/mish_op.h"
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#include <memory>
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#include <string>
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namespace paddle {
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namespace operators {
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class MishOp : public framework::OperatorWithKernel {
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public:
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using framework::OperatorWithKernel::OperatorWithKernel;
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void InferShape(framework::InferShapeContext *ctx) const override {
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OP_INOUT_CHECK(ctx->HasInput("X"), "Input", "X", "mish");
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OP_INOUT_CHECK(ctx->HasOutput("Out"), "Output", "Out", "mish");
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ctx->ShareDim("X", /*->*/ "Out");
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ctx->ShareLoD("X", /*->*/ "Out");
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}
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protected:
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framework::OpKernelType GetExpectedKernelType(
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const framework::ExecutionContext &ctx) const override {
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return framework::OpKernelType(
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OperatorWithKernel::IndicateVarDataType(ctx, "X"),
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ctx.device_context());
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}
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};
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class MishOpMaker : public framework::OpProtoAndCheckerMaker {
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public:
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void Make() override {
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AddInput("X", "Input of Mish operator");
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AddOutput("Out", "Output of Mish operator");
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AddAttr<float>(
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"threshold",
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"Constant threshold of softplus in Mish operator. Approximate value "
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"of softplus will be used if absolute value of input is greater than "
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":attr:`threshold`")
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.SetDefault(20.f);
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AddComment(R"DOC(
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Mish Activation Operator.
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.. math::
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softplus = \begin{cases}
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x, \text{if } x > \text{threshold} \\
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e^{x}, \text{if } x < -\text{threshold} \\
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\ln(1 + e^{x}), \text{otherwise}
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\end{cases}
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out = x * \tanh(softplus)
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)DOC");
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}
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};
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// The operator to calculate gradients of a prelu operator.
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class MishGradOp : public framework::OperatorWithKernel {
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public:
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using framework::OperatorWithKernel::OperatorWithKernel;
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void InferShape(framework::InferShapeContext *ctx) const override {
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OP_INOUT_CHECK(ctx->HasInput("X"), "Input", "X", "mish");
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OP_INOUT_CHECK(ctx->HasInput(framework::GradVarName("Out")), "Input",
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"Out@GRAD", "mish");
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auto x_grad_name = framework::GradVarName("X");
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if (ctx->HasOutput(x_grad_name)) {
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ctx->SetOutputDim(x_grad_name, ctx->GetInputDim("X"));
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}
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}
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protected:
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framework::OpKernelType GetExpectedKernelType(
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const framework::ExecutionContext &ctx) const override {
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return framework::OpKernelType(
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OperatorWithKernel::IndicateVarDataType(ctx, "X"),
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ctx.device_context());
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}
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};
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template <typename T>
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class MishGradOpMaker : public framework::SingleGradOpMaker<T> {
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public:
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using framework::SingleGradOpMaker<T>::SingleGradOpMaker;
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protected:
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void Apply(GradOpPtr<T> op) const override {
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op->SetType("mish_grad");
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op->SetInput("X", this->Input("X"));
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op->SetInput(framework::GradVarName("Out"), this->OutputGrad("Out"));
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op->SetOutput(framework::GradVarName("X"), this->InputGrad("X"));
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op->SetAttrMap(this->Attrs());
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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_OPERATOR(mish, ops::MishOp, ops::MishOpMaker,
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ops::MishGradOpMaker<paddle::framework::OpDesc>,
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ops::MishGradOpMaker<paddle::imperative::OpBase>);
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REGISTER_OPERATOR(mish_grad, ops::MishGradOp);
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REGISTER_OP_CPU_KERNEL(
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mish, ops::MishFP32CPUKernel<paddle::platform::CPUDeviceContext>,
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ops::MishCPUKernel<paddle::platform::CPUDeviceContext, double>);
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REGISTER_OP_CPU_KERNEL(
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mish_grad, ops::MishGradFP32CPUKernel<paddle::platform::CPUDeviceContext>,
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ops::MishGradCPUKernel<paddle::platform::CPUDeviceContext, double>);
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