/* * Copyright (c) 2018-2020 Atmosphère-NX * * This program is free software; you can redistribute it and/or modify it * under the terms and conditions of the GNU General Public License, * version 2, as published by the Free Software Foundation. * * This program is distributed in the hope it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for * more details. * * You should have received a copy of the GNU General Public License * along with this program. If not, see <http://www.gnu.org/licenses/>. */ #pragma once #include <vapours/common.hpp> #include <vapours/assert.hpp> namespace ams::util { /* Utilities for alignment to power of two. */ template<typename T> constexpr ALWAYS_INLINE bool IsPowerOfTwo(T value) { using U = typename std::make_unsigned<T>::type; return (static_cast<U>(value) & static_cast<U>(value - 1)) == 0; } template<typename T> constexpr ALWAYS_INLINE T AlignUp(T value, size_t alignment) { using U = typename std::make_unsigned<T>::type; const U invmask = static_cast<U>(alignment - 1); return static_cast<T>((value + invmask) & ~invmask); } template<typename T> constexpr ALWAYS_INLINE T AlignDown(T value, size_t alignment) { using U = typename std::make_unsigned<T>::type; const U invmask = static_cast<U>(alignment - 1); return static_cast<T>(value & ~invmask); } template<typename T> constexpr ALWAYS_INLINE bool IsAligned(T value, size_t alignment) { using U = typename std::make_unsigned<T>::type; const U invmask = static_cast<U>(alignment - 1); return (value & invmask) == 0; } template<> constexpr ALWAYS_INLINE void *AlignUp<void *>(void *value, size_t alignment) { return reinterpret_cast<void *>(AlignUp(reinterpret_cast<uintptr_t>(value), alignment)); } template<> constexpr ALWAYS_INLINE const void *AlignUp<const void *>(const void *value, size_t alignment) { return reinterpret_cast<const void *>(AlignUp(reinterpret_cast<uintptr_t>(value), alignment)); } template<> constexpr ALWAYS_INLINE void *AlignDown<void *>(void *value, size_t alignment) { return reinterpret_cast<void *>(AlignDown(reinterpret_cast<uintptr_t>(value), alignment)); } template<> constexpr ALWAYS_INLINE const void *AlignDown<const void *>(const void *value, size_t alignment) { return reinterpret_cast<void *>(AlignDown(reinterpret_cast<uintptr_t>(value), alignment)); } template<> constexpr ALWAYS_INLINE bool IsAligned<void *>(void *value, size_t alignment) { return IsAligned(reinterpret_cast<uintptr_t>(value), alignment); } template<> constexpr ALWAYS_INLINE bool IsAligned<const void *>(const void *value, size_t alignment) { return IsAligned(reinterpret_cast<uintptr_t>(value), alignment); } }