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diff --git a/runtimes/neurun/core/src/exec/interp/operations/OperationUtil.h b/runtimes/neurun/core/src/exec/interp/operations/OperationUtil.h
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+/*
+ * 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.
+ */
+
+#ifndef __NEURUN_EXEC_INTERP_OPERATIONS_OPERATION_UTILS_H_
+#define __NEURUN_EXEC_INTERP_OPERATIONS_OPERATION_UTILS_H_
+
+#include "model/Shape.h"
+#include "model/InternalType.h"
+
+#include <cker/Shape.h>
+
+namespace neurun
+{
+namespace exec
+{
+namespace interp
+{
+
+inline nnfw::cker::Shape convertShape(const model::Shape &shape)
+{
+  auto dimensions = std::vector<uint32_t>(shape.dims().begin(), shape.dims().end());
+
+  std::vector<int32_t> raw_shape;
+  raw_shape.resize(4);
+
+  for (uint32_t i = 0; i < 4; ++i)
+  {
+    if (i >= dimensions.size())
+    {
+      raw_shape[i] = 1;
+    }
+    else
+    {
+      raw_shape[i] = dimensions[i];
+    }
+  }
+
+  return nnfw::cker::GetShape(raw_shape);
+}
+
+inline nnfw::cker::Shape convertExtendShape(const model::Shape &shape)
+{
+  auto dimensions = std::vector<uint32_t>(shape.dims().begin(), shape.dims().end());
+
+  std::vector<int32_t> raw_shape;
+  raw_shape.resize(4);
+  uint32_t start = 4 - dimensions.size();
+
+  for (uint32_t i = 0; i < 4; ++i)
+  {
+    if (i < start)
+    {
+      raw_shape[i] = 1;
+    }
+    else
+    {
+      raw_shape[i] = dimensions[i - start];
+    }
+  }
+
+  return nnfw::cker::GetShape(raw_shape);
+}
+
+template <typename T>
+void calculateActivationRange(model::Activation activation, T *activation_min, T *activation_max)
+{
+  if (activation == model::Activation::RELU)
+  {
+    *activation_min = 0;
+    *activation_max = std::numeric_limits<T>::max();
+  }
+  else if (activation == model::Activation::RELU6)
+  {
+    *activation_min = 0;
+    *activation_max = 6;
+  }
+  else if (activation == model::Activation::RELU1)
+  {
+    *activation_min = -1;
+    *activation_max = 1;
+  }
+  else if (activation == model::Activation::NONE)
+  {
+    *activation_min = std::numeric_limits<T>::lowest();
+    *activation_max = std::numeric_limits<T>::max();
+  }
+  else
+  {
+    throw std::runtime_error{"Unsupported activation type"};
+  }
+}
+
+} // namespace interp
+} // namespace exec
+} // namespace neurun
+
+#endif // __NEURUN_EXEC_INTERP_OPERATIONS_OPERATION_UTILS_H_