[NGraph] Added lookup table to ngraph engine test=develop (#17647)

cmake/external/ngraph.cmake

@@ -37,7 +37,7 @@ INCLUDE(GNUInstallDirs)
 INCLUDE(ExternalProject)
 
 SET(NGRAPH_PROJECT         "extern_ngraph")
-SET(NGRAPH_GIT_TAG         "096ad6ef0c04d57db1522940dbdf9a0652768065")
+SET(NGRAPH_GIT_TAG         "4ec94acc11084a5d53418f565529310fa584899a")
 SET(NGRAPH_SOURCES_DIR     ${THIRD_PARTY_PATH}/ngraph)
 SET(NGRAPH_INSTALL_DIR     ${THIRD_PARTY_PATH}/install/ngraph)
 SET(NGRAPH_INC_DIR         ${NGRAPH_INSTALL_DIR}/include)

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

@@ -0,0 +1,103 @@
+/*Copyright (c) 2019 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 <memory>
+#include <string>
+#include <unordered_map>
+#include <vector>
+
+#include "ngraph/ngraph.hpp"
+#include "ngraph/op/embedding_lookup.hpp"
+#include "paddle/fluid/operators/lookup_table_op.h"
+#include "paddle/fluid/operators/ngraph/ops/op_bridge.h"
+#include "paddle/fluid/platform/ngraph_helper.h"
+
+namespace paddle {
+namespace operators {
+namespace ngraphs {
+
+void BuildLookupTableNode(
+    const std::shared_ptr<framework::OperatorBase>& op,
+    std::shared_ptr<
+        std::unordered_map<std::string, std::shared_ptr<ngraph::Node>>>
+        ngb_node_map) {
+  auto op_attrs = paddle::framework::AttrReader(op->Attrs());
+  const bool is_sparse = op_attrs.Get<bool>("is_sparse");
+  const int64_t padding_idx = op_attrs.Get<int64_t>("padding_idx");
+
+  auto ng_ids = paddle::platform::GetInputNode(op, "Ids", ngb_node_map);
+  PADDLE_ENFORCE_NOT_NULL(ng_ids);
+
+  const auto ng_w = paddle::platform::GetInputNode(op, "W", ngb_node_map);
+  PADDLE_ENFORCE_NOT_NULL(ng_w);
+
+  if (is_sparse) {
+    PADDLE_THROW("Sparsity is not yet supported in nGraph lookup_table op.");
+  }
+
+  if (padding_idx != kNoPadding) {
+    PADDLE_THROW("Padding is not yet supported in nGraph lookup_table op.");
+  }
+  auto shape = ng_ids->get_shape();
+  if (shape.back() == 1) {
+    shape.pop_back();
+    ng_ids = platform::NgReshaper(ng_ids, shape);
+  }
+  auto ng_lookup = std::make_shared<ngraph::op::Gather>(ng_w, ng_ids);
+  platform::SetOutputNode(op, "Out", ng_lookup, ngb_node_map);
+}
+
+void BuildLookupTableGradNode(
+    const std::shared_ptr<framework::OperatorBase>& op,
+    std::shared_ptr<
+        std::unordered_map<std::string, std::shared_ptr<ngraph::Node>>>
+        ngb_node_map) {
+  auto op_attrs = paddle::framework::AttrReader(op->Attrs());
+  const bool is_sparse = op_attrs.Get<bool>("is_sparse");
+  const int64_t padding_idx = op_attrs.Get<int64_t>("padding_idx");
+
+  auto ng_ids = paddle::platform::GetInputNode(op, "Ids", ngb_node_map);
+  PADDLE_ENFORCE_NOT_NULL(ng_ids);
+
+  const auto ng_w = paddle::platform::GetInputNode(op, "W", ngb_node_map);
+  PADDLE_ENFORCE_NOT_NULL(ng_w);
+
+  auto dout = paddle::platform::GetInputNode(op, "Out@GRAD", ngb_node_map);
+
+  if (is_sparse) {
+    PADDLE_THROW("Sparsity is not yet supported in nGraph lookup_table op.");
+  }
+
+  if (padding_idx != kNoPadding) {
+    PADDLE_THROW("Padding is not yet supported in nGraph lookup_table op.");
+  }
+  auto shape = ng_ids->get_shape();
+  if (shape.back() == 1) {
+    shape.pop_back();
+    ng_ids = platform::NgReshaper(ng_ids, shape);
+  }
+
+  std::shared_ptr<ngraph::Node> W0 = paddle::platform::CreateConstant(
+      dout->get_element_type(), ng_w->get_shape(), {0});
+  auto dW = std::make_shared<ngraph::op::ScatterAdd>(W0, ng_ids, dout);
+  platform::SetOutputNode(op, "W@GRAD", dW, ngb_node_map);
+}
+}  // namespace ngraphs
+}  // namespace operators
+}  // namespace paddle
+
+REGISTER_NG_OP(lookup_table, BuildLookupTableNode);
+REGISTER_NG_OP(lookup_table_grad, BuildLookupTableGradNode);

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

@@ -0,0 +1,21 @@
+#   Copyright (c) 2019 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_lookup_table_op import *
+
+if __name__ == "__main__":
+    unittest.main()