1 files changed, 81 insertions, 0 deletions
diff --git a/compiler/angkor/include/nncc/core/ADT/kernel/Overlay.h b/compiler/angkor/include/nncc/core/ADT/kernel/Overlay.h
new file mode 100644
index 000000000..e348a8769
--- /dev/null
+++ b/compiler/angkor/include/nncc/core/ADT/kernel/Overlay.h
@@ -0,0 +1,81 @@
+/*
+ * Copyright (c) 2018 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 __NNCC_CORE_ADT_KERNEL_OVERLAY_H__
+#define __NNCC_CORE_ADT_KERNEL_OVERLAY_H__
+
+#include "nncc/core/ADT/kernel/View.h"
+#include "nncc/core/ADT/kernel/ViewImpl.h"
+
+#include <vector>
+
+namespace nncc
+{
+namespace core
+{
+namespace ADT
+{
+namespace kernel
+{
+
+template <typename T, typename InputIt> class Overlay final : public View<T>
+{
+public:
+  explicit Overlay(const Shape &shape, const Layout &layout, InputIt it)
+      : _impl{shape, layout}, _it{it}
+  {
+    // DO NOTHING
+  }
+
+public:
+  T at(uint32_t nth, uint32_t ch, uint32_t row, uint32_t col) const override
+  {
+    return _impl.at(_it, nth, ch, row, col);
+  }
+
+public:
+  T &at(uint32_t nth, uint32_t ch, uint32_t row, uint32_t col) override
+  {
+    return _impl.at(_it, nth, ch, row, col);
+  }
+
+public:
+  const Shape &shape(void) const override { return _impl.shape(); }
+
+private:
+  InputIt const _it;
+  ViewImpl<T> _impl;
+};
+
+template <typename T, typename LayoutImpl> struct OverlayFactory
+{
+  template <typename InputIt> static Overlay<T, InputIt> make(const Shape &shape, InputIt it)
+  {
+    return Overlay<T, InputIt>{shape, LayoutImpl{}, it};
+  }
+};
+
+template <typename T, typename LayoutImpl> Overlay<T, T *> make_overlay(const Shape &shape, T *base)
+{
+  return OverlayFactory<T, LayoutImpl>::make(shape, base);
+}
+
+} // namespace kernel
+} // namespace ADT
+} // namespace core
+} // namespace nncc
+
+#endif // __NNCC_CORE_ADT_KERNEL_OVERLAY_H__