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112 lines
4.1 KiB
112 lines
4.1 KiB
/*Copyright (c) 2019 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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#pragma once
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#include <algorithm>
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#include <memory>
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#include <string>
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#include <unordered_map>
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#include <vector>
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#include "ngraph/ngraph.hpp"
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#include "paddle/fluid/operators/ngraph/ops/op_bridge.h"
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#include "paddle/fluid/platform/ngraph_helper.h"
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namespace paddle {
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namespace operators {
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namespace ngraphs {
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void BuildSliceNode(
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const std::shared_ptr<framework::OperatorBase>& op,
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std::shared_ptr<
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std::unordered_map<std::string, std::shared_ptr<ngraph::Node>>>
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ngb_node_map) {
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auto input = paddle::platform::GetInputNode(op, "Input", ngb_node_map);
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auto input_shape = input->get_shape();
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auto op_attrs = framework::AttrReader(op->Attrs());
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auto axes = op_attrs.Get<std::vector<int>>("axes");
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auto starts = op_attrs.Get<std::vector<int>>("starts");
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auto ends = op_attrs.Get<std::vector<int>>("ends");
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ngraph::Coordinate ng_start, ng_end;
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int axis, start, end;
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for (size_t i = 0; i < input_shape.size(); ++i) {
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ng_start.push_back(0);
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ng_end.push_back(input_shape[i]);
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}
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for (size_t i = 0; i < axes.size(); ++i) {
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axis = input_shape[axes[i]];
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start = starts[i] < 0 ? (starts[i] + axis) : starts[i];
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end = ends[i] < 0 ? (ends[i] + axis) : ends[i];
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start = std::max(start, 0);
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end = std::max(end, 0);
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start = std::min(start, axis);
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end = std::min(end, axis);
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start = std::min(start, end);
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ng_start[axes[i]] = start;
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ng_end[axes[i]] = end;
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}
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auto out = std::make_shared<ngraph::op::Slice>(input, ng_start, ng_end);
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platform::SetOutputNode(op, "Out", out, ngb_node_map);
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}
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void BuildSliceGradNode(
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const std::shared_ptr<framework::OperatorBase>& op,
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std::shared_ptr<
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std::unordered_map<std::string, std::shared_ptr<ngraph::Node>>>
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ngb_node_map) {
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auto input = paddle::platform::GetInputNode(op, "Input", ngb_node_map);
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auto input_shape = input->get_shape();
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auto dout = paddle::platform::GetInputNode(op, "Out@GRAD", ngb_node_map);
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auto op_attrs = framework::AttrReader(op->Attrs());
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auto axes = op_attrs.Get<std::vector<int>>("axes");
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auto starts = op_attrs.Get<std::vector<int>>("starts");
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auto ends = op_attrs.Get<std::vector<int>>("ends");
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auto reshape = input_shape;
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ngraph::Coordinate ng_start, ng_end;
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int axis, start, end;
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for (size_t i = 0; i < input_shape.size(); ++i) {
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ng_start.push_back(0);
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ng_end.push_back(input_shape[i]);
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}
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for (size_t i = 0; i < axes.size(); ++i) {
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axis = input_shape[axes[i]];
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start = starts[i] < 0 ? (starts[i] + axis) : starts[i];
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end = ends[i] < 0 ? (ends[i] + axis) : ends[i];
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start = std::max(start, 0);
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end = std::max(end, 0);
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start = std::min(start, axis);
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end = std::min(end, axis);
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start = std::min(start, end);
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ng_start[axes[i]] = start;
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ng_end[axes[i]] = end;
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reshape[axes[i]] = end - start;
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}
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std::vector<size_t> axisVec(dout->get_shape().size());
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std::iota(axisVec.begin(), axisVec.end(), 0);
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auto dout_reshape = std::make_shared<ngraph::op::Reshape>(
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dout, ngraph::AxisVector(axisVec), reshape);
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std::shared_ptr<ngraph::Node> input0 = paddle::platform::CreateConstant(
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dout->get_element_type(), input_shape, {0});
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auto din = std::make_shared<ngraph::op::ReplaceSlice>(input0, dout_reshape,
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ng_start, ng_end);
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platform::SetOutputNode(op, "Input@GRAD", din, ngb_node_map);
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}
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} // namespace ngraphs
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} // namespace operators
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} // namespace paddle
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REGISTER_NG_OP(slice, BuildSliceNode);
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REGISTER_NG_OP(slice_grad, BuildSliceGradNode);
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