1 files changed, 95 insertions, 0 deletions
diff --git a/compiler/moco/import/src/Nodes/Identity.cpp b/compiler/moco/import/src/Nodes/Identity.cpp
new file mode 100644
index 000000000..8ca0e2d01
--- /dev/null
+++ b/compiler/moco/import/src/Nodes/Identity.cpp
@@ -0,0 +1,95 @@
+/*
+ * Copyright (c) 2019 Samsung Electronics Co., Ltd. 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.
+ */
+
+#include "moco/Import/Nodes/Identity.h"
+
+#include <moco/IR/Nodes/TFIdentity.h>
+
+#include <moco/Names.h>
+#include <loco.h>
+#include <stdex/Memory.h>
+
+#include <vector>
+
+namespace
+{
+
+using namespace moco;
+
+class TFIdentityGraphUpdate final : public GraphUpdate
+{
+public:
+  TFIdentityGraphUpdate(TFIdentity *node, const std::vector<TensorName> &names)
+      : _node(node), _names(names)
+  {
+  }
+
+  void input(const SymbolTable *) const override;
+
+private:
+  TFIdentity *_node;
+  const std::vector<TensorName> _names;
+};
+
+void TFIdentityGraphUpdate::input(const SymbolTable *tensor_names) const
+{
+  for (auto &name : _names)
+  {
+    loco::Node *target = tensor_names->node(name);
+    _node->input(target);
+  }
+}
+
+} // namespace
+
+namespace moco
+{
+
+bool IdentityGraphBuilder::validate(const tensorflow::NodeDef &node) const
+{
+  if (node.input_size() < 1) // from TensorFlow lite toco
+    return false;
+
+  return true;
+}
+
+void IdentityGraphBuilder::build(const tensorflow::NodeDef &node,
+                                 GraphBuilderContext *context) const
+{
+  loco::Graph *graph = context->graph();
+  SymbolTable *tensor_names = context->tensor_names();
+  UpdateQueue *updates = context->updates();
+
+  // Create a Identity node
+  auto identity_node = graph->nodes()->create<TFIdentity>();
+  identity_node->name(node.name());
+
+  // register string-name to node
+  TensorName output_name(node.name(), 0);
+  tensor_names->enroll(output_name, identity_node);
+
+  // Queue node input update
+  // TODO: Check if we really need multiple input handlings
+  std::vector<TensorName> names;
+  for (int i = 0; i < node.input_size(); ++i)
+  {
+    names.emplace_back(TensorName(node.input(i)));
+  }
+  auto update = stdex::make_unique<TFIdentityGraphUpdate>(identity_node, names);
+  updates->enroll(std::move(update));
+}
+
+} // namespace moco