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diff --git a/compiler/moco/pass/src/ConstantFoldHelper.h b/compiler/moco/pass/src/ConstantFoldHelper.h
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+++ b/compiler/moco/pass/src/ConstantFoldHelper.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 __MOCO_CONSTANT_FOLD_HELPER_H__
+#define __MOCO_CONSTANT_FOLD_HELPER_H__
+
+#include <moco/IR/Nodes/TFConst.h>
+
+#include <loco.h>
+#include <loco/IR/TensorShape.h>
+
+namespace moco
+{
+
+TFConst *new_const(loco::Graph *graph, loco::TensorShape &tensor_shape,
+                   const loco::DataType &dtype);
+
+template <typename T> T scalar_from_const(const TFConst *tfconst);
+template <> int32_t scalar_from_const<int32_t>(const TFConst *tfconst);
+template <> float scalar_from_const<float>(const TFConst *tfconst);
+
+/**
+ * @note Check if it is valid to run Constant folding for binary operations
+ *       as-of current implementation. That is currently we support for
+ *       element-wise or one of the input is scalar.
+ *       TODO Support other shapes of binary operation
+ */
+bool valid_shape_for_constfold_binary_op(const loco::TensorShape &lhs,
+                                         const loco::TensorShape &rhs);
+
+struct BinaryFunc
+{
+  virtual ~BinaryFunc() = default;
+
+  virtual float apply(float, float) const;
+  virtual int32_t apply(int32_t, int32_t) const;
+};
+
+template <typename T>
+void apply_binary(const moco::TFConst *x_const, const moco::TFConst *y_const,
+                  moco::TFConst *output_const, const moco::BinaryFunc &f);
+template <>
+void apply_binary<int32_t>(const moco::TFConst *x_const, const moco::TFConst *y_const,
+                           moco::TFConst *output_const, const moco::BinaryFunc &f);
+template <>
+void apply_binary<float>(const moco::TFConst *x_const, const moco::TFConst *y_const,
+                         moco::TFConst *output_const, const moco::BinaryFunc &f);
+
+} // namespace moco
+
+#endif // __MOCO_CONSTANT_FOLD_HELPER_H__