1 files changed, 61 insertions, 0 deletions
diff --git a/compiler/mir-onnx-importer/Op/Constant.cpp b/compiler/mir-onnx-importer/Op/Constant.cpp
new file mode 100644
index 000000000..710760ed3
--- /dev/null
+++ b/compiler/mir-onnx-importer/Op/Constant.cpp
@@ -0,0 +1,61 @@
+/*
+ * 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 "Constant.h"
+
+#include "ONNXHelpers.h"
+#include "AttributeHelpers.h"
+
+#include "mir/TensorVariant.h"
+#include "mir/ops/ConstantOp.h"
+
+namespace mir_onnx
+{
+
+void convertConstantV1(const onnx::NodeProto &onnx_node, ConverterContext *context)
+{
+  std::vector<mir::Operation::Output *> inputs = context->getNodeInputs(onnx_node);
+  mir::Graph *graph = context->getGraph();
+
+  const auto onnx_tensor = getAttributeValue<onnx::TensorProto>(onnx_node, "value");
+  auto mir_tensor = createTensor(&onnx_tensor);
+
+  auto result = graph->create<mir::ops::ConstantOp>(mir_tensor)->getOutput(0);
+
+  context->setNodeOutputs(onnx_node, {result});
+}
+
+void convertConstantV9(const onnx::NodeProto &onnx_node, ConverterContext *context)
+{
+  // Since version 9 Constant operation support other types contained in tensor
+  convertConstantV1(onnx_node, context);
+}
+
+void convertConstantV11(const onnx::NodeProto &onnx_node, ConverterContext *context)
+{
+  const auto *value_attr = findAttribute(onnx_node, "value");
+  const auto *sparse_value_attr = findAttribute(onnx_node, "sparse_value");
+  if (value_attr == nullptr && sparse_value_attr == nullptr)
+    throw std::runtime_error("Not enough attributes in Constant operation!");
+
+  if (value_attr != nullptr)
+    return convertConstantV9(onnx_node, context);
+
+  if (sparse_value_attr != nullptr)
+    throw std::runtime_error("Not supported sparse_tensor in Constant operation!");
+}
+
+} // namespace mir_onnx