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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 __BROADCAST_HELPER_H__
+#define __BROADCAST_HELPER_H__
+
+#include <loco/IR/Node.h>
+#include <loco/IR/Dimension.h>
+#include <loco/IR/TensorShape.h>
+
+#include <bino.h>
+#include <fipe.h> // include "fipe.h" for clients
+
+namespace moco
+{
+namespace tf
+{
+
+class BroadcastFunctor final
+{
+public:
+ BroadcastFunctor(const loco::TensorShape &shape) : _shape{shape}
+ {
+ // DO NOTHING
+ }
+
+public:
+ loco::Node *build(loco::Node *in_node, const loco::TensorShape &in_shape) const;
+
+ loco::Node *operator()(loco::Node *in_node, const loco::TensorShape &in_shape) const
+ {
+ return build(in_node, in_shape);
+ }
+
+ // This method assumes the followings:
+ // - loco::shape_known(node) returns true, and
+ // - loco::shape_get(node).domain() is loco::Domain::Tensor
+ loco::Node *build(loco::Node *node) const;
+
+ loco::Node *operator()(loco::Node *node) const { return build(node); }
+
+private:
+ loco::TensorShape _shape;
+};
+
+/**
+ * @brief Create a broadcasted node
+ *
+ * First, append canonical.FixedReshape if rank expansion is required.
+ * Then, append canonical.TensorBroadcast if dimension expansion is required
+ *
+ * This mimics "tf.broadcast_to" API in TensorFlow.
+ */
+static inline auto broadcast_to(const loco::TensorShape &shape)
+ -> decltype(bino::transform_both(std::declval<BroadcastFunctor>()))
+{
+ return bino::transform_both(BroadcastFunctor{shape});
+}
+
+} // namespace tf
+} // namespace moco
+
+#endif // __BROADCAST_HELPER_H__