Ngraph Enable gather operator test=develop (#17296)

paddle/fluid/operators/ngraph/ops/gather_op.h

+/* Copyright (c) 2018 PaddlePaddle Authors. All Rights Reserved.
+
+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. */
+
+#pragma once
+
+#include <functional>
+#include <memory>
+#include <string>
+#include <unordered_map>
+#include <vector>
+#include "ngraph/ngraph.hpp"
+#include "paddle/fluid/operators/ngraph/ops/op_bridge.h"
+#include "paddle/fluid/platform/ngraph_helper.h"
+
+namespace paddle {
+namespace operators {
+namespace ngraphs {
+
+void BuildGatherNode(
+    const std::shared_ptr<paddle::framework::OperatorBase>& op,
+    std::shared_ptr<
+        std::unordered_map<std::string, std::shared_ptr<ngraph::Node>>>
+        ngb_node_map) {
+  auto x = platform::GetInputNode(op, "X", ngb_node_map);
+  auto index = platform::GetInputNode(op, "Index", ngb_node_map);
+  auto x_shape = x->get_shape();
+  size_t axis_1 = x_shape[0];
+  size_t axis_2 = 1;
+  if (x_shape.size() > 1) {
+    axis_2 = std::accumulate(std::begin(x_shape) + 1, std::end(x_shape), 1,
+                             std::multiplies<size_t>());
+  }
+  std::vector<size_t> x_order(x_shape.size());
+  std::iota(std::begin(x_order), std::end(x_order), 0);
+  auto x_reshape = std::make_shared<ngraph::op::Reshape>(
+      x, ngraph::AxisVector(x_order), ngraph::Shape{axis_1, axis_2});
+  auto x_reshape_shape = x_reshape->get_shape();
+  auto result = std::make_shared<ngraph::op::EmbeddingLookup>(index, x_reshape);
+  auto result_shape = result->get_shape();
+  std::vector<size_t> out_shape(x_shape);
+  out_shape[0] = result_shape[0];
+  std::vector<size_t> axis_vector;
+  for (size_t i = 0; i < result_shape.size(); i++) {
+    axis_vector.push_back(i);
+  }
+  auto out = std::make_shared<ngraph::op::Reshape>(
+      result, ngraph::AxisVector(axis_vector), out_shape);
+  paddle::platform::SetOutputNode(op, "Out", out, ngb_node_map);
+}
+}  // namespace ngraphs
+}  // namespace operators
+}  // namespace paddle
+
+REGISTER_NG_OP(gather, BuildGatherNode);

python/paddle/fluid/tests/unittests/ngraph/test_gather_ngraph_op.py

+#   Copyright (c) 2018 PaddlePaddle Authors. All Rights Reserved.
+#
+# 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.
+from __future__ import print_function
+
+import unittest, sys
+sys.path.append("../")
+from test_gather_op import TestGatherOp, TestCase1
+
+if __name__ == "__main__":
+    unittest.main()