cleanup and refactoring

raytracer/nvpro_core/nvh/alignment.hpp

@@ -0,0 +1,49 @@
+/*
+ * Copyright (c) 2014-2021, NVIDIA CORPORATION.  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.
+ *
+ * SPDX-FileCopyrightText: Copyright (c) 2014-2021 NVIDIA CORPORATION
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+/// @DOC_SKIP (keyword to exclude this file from automatic README.md generation)
+
+#pragma once
+
+#ifndef NVH_ALIGNEMENT_HPP
+#define NVH_ALIGNEMENT_HPP 1
+
+#include <stddef.h>  // for size_t
+
+namespace nvh {
+template <class integral>
+constexpr bool is_aligned(integral x, size_t a) noexcept
+{
+  return (x & (integral(a) - 1)) == 0;
+}
+
+template <class integral>
+constexpr integral align_up(integral x, size_t a) noexcept
+{
+  return integral((x + (integral(a) - 1)) & ~integral(a - 1));
+}
+
+template <class integral>
+constexpr integral align_down(integral x, size_t a) noexcept
+{
+  return integral(x & ~integral(a - 1));
+}
+}  // namespace nvh
+
+#endif  // !NVH_ALIGNEMENT_HPP