100 lines
2.6 KiB
C++
100 lines
2.6 KiB
C++
/* PCSX2 - PS2 Emulator for PCs
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* Copyright (C) 2002-2021 PCSX2 Dev Team
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*
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* PCSX2 is free software: you can redistribute it and/or modify it under the terms
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* of the GNU Lesser General Public License as published by the Free Software Found-
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* ation, either version 3 of the License, or (at your option) any later version.
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*
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* PCSX2 is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
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* without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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* PURPOSE. See the GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along with PCSX2.
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* If not, see <http://www.gnu.org/licenses/>.
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*/
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#pragma once
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#include "common/Pcsx2Defs.h"
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namespace Common
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{
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template <typename T>
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static constexpr __fi bool IsAligned(T value, unsigned int alignment)
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{
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return (value % static_cast<T>(alignment)) == 0;
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}
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template <typename T>
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static constexpr __fi T AlignUp(T value, unsigned int alignment)
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{
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return (value + static_cast<T>(alignment - 1)) / static_cast<T>(alignment) * static_cast<T>(alignment);
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}
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template <typename T>
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static constexpr __fi T AlignDown(T value, unsigned int alignment)
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{
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return value / static_cast<T>(alignment) * static_cast<T>(alignment);
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}
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template <typename T>
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static constexpr __fi bool IsAlignedPow2(T value, unsigned int alignment)
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{
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return (value & static_cast<T>(alignment - 1)) == 0;
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}
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template <typename T>
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static constexpr __fi T AlignUpPow2(T value, unsigned int alignment)
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{
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return (value + static_cast<T>(alignment - 1)) & static_cast<T>(~static_cast<T>(alignment - 1));
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}
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template <typename T>
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static constexpr __fi T AlignDownPow2(T value, unsigned int alignment)
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{
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return value & static_cast<T>(~static_cast<T>(alignment - 1));
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}
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template <typename T>
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static constexpr __fi bool IsPow2(T value)
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{
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return (value & (value - 1)) == 0;
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}
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template <typename T>
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static constexpr __fi T PreviousPow2(T value)
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{
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if (value == static_cast<T>(0))
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return 0;
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value |= (value >> 1);
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value |= (value >> 2);
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value |= (value >> 4);
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value |= (value >> 8);
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value |= (value >> 16);
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return value - (value >> 1);
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}
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template<typename T>
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static constexpr __fi T NextPow2(T value)
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{
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if (value == static_cast<T>(0))
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return 0;
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value--;
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value |= value >> 1;
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value |= value >> 2;
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value |= value >> 4;
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value |= value >> 8;
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value |= value >> 16;
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value++;
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return value;
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}
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template <typename T>
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static constexpr T PageAlign(T size)
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{
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static_assert(Common::IsPow2(__pagesize), "Page size is a power of 2");
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return Common::AlignUpPow2(size, __pagesize);
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}
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} // namespace Common
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