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88 lines
2.9 KiB
88 lines
2.9 KiB
// Copyright (c) 2018 PaddlePaddle Authors. All Rights Reserved.
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//
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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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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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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 <vector>
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#include "paddle/fluid/framework/eigen.h"
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#include "paddle/fluid/framework/op_registry.h"
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namespace paddle {
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namespace operators {
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template <typename DeviceContext, typename T, int Rank>
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struct ReverseFunctor {
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void operator()(const DeviceContext& context, const framework::LoDTensor& in,
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framework::LoDTensor* out, const std::vector<int>& axis) {
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Eigen::array<bool, Rank> reverse_axis;
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for (int i = 0; i < Rank; ++i) {
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reverse_axis[i] = false;
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}
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for (int a : axis) {
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reverse_axis[a] = true;
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}
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auto in_eigen = framework::EigenTensor<T, Rank>::From(in);
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auto out_eigen = framework::EigenTensor<T, Rank>::From(*out);
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auto* dev = context.eigen_device();
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out_eigen.device(*dev) = in_eigen.reverse(reverse_axis);
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}
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};
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template <typename DeviceContext, typename T>
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class ReverseKernel : public framework::OpKernel<T> {
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public:
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void Compute(const framework::ExecutionContext& context) const override {
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auto* x = context.Input<framework::LoDTensor>("X");
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auto* out = context.Output<framework::LoDTensor>("Out");
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out->mutable_data<T>(context.GetPlace());
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const auto& axis = context.Attr<std::vector<int>>("axis");
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int rank = x->dims().size();
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auto& dev_ctx = context.template device_context<DeviceContext>();
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switch (rank) {
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case 1:
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ReverseFunctor<DeviceContext, T, 1> functor1;
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functor1(dev_ctx, *x, out, axis);
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break;
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case 2:
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ReverseFunctor<DeviceContext, T, 2> functor2;
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functor2(dev_ctx, *x, out, axis);
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break;
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case 3:
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ReverseFunctor<DeviceContext, T, 3> functor3;
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functor3(dev_ctx, *x, out, axis);
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break;
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case 4:
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ReverseFunctor<DeviceContext, T, 4> functor4;
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functor4(dev_ctx, *x, out, axis);
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break;
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case 5:
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ReverseFunctor<DeviceContext, T, 5> functor5;
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functor5(dev_ctx, *x, out, axis);
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break;
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case 6:
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ReverseFunctor<DeviceContext, T, 6> functor6;
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functor6(dev_ctx, *x, out, axis);
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break;
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default:
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PADDLE_THROW(
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"Reserve operator doesn't supports tensors whose ranks are greater "
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"than 6.");
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}
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}
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};
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} // namespace operators
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} // namespace paddle
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