57 lines
1.5 KiB
C++
57 lines
1.5 KiB
C++
/* This file is part of the dynarmic project.
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* Copyright (c) 2018 MerryMage
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* This software may be used and distributed according to the terms of the GNU
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* General Public License version 2 or any later version.
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*/
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#pragma once
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#include <cstring>
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#include <type_traits>
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#include "common/bit_util.h"
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#include "common/common_types.h"
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namespace Dynarmic {
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struct u128 {
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u128() = default;
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u128(const u128&) = default;
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u128(u128&&) = default;
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u128& operator=(const u128&) = default;
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u128& operator=(u128&&) = default;
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u128(u64 lower_, u64 upper_) : lower(lower_), upper(upper_) {}
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template <typename T>
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/* implicit */ u128(T value) : lower(value), upper(0) {
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static_assert(std::is_integral_v<T>);
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static_assert(Common::BitSize<T>() <= Common::BitSize<u64>());
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}
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u64 lower = 0;
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u64 upper = 0;
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};
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static_assert(Common::BitSize<u128>() == 128);
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static_assert(std::is_standard_layout_v<u128>);
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static_assert(std::is_trivially_copyable_v<u128>);
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inline u128 operator+(u128 a, u128 b) {
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u128 result;
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result.lower = a.lower + b.lower;
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result.upper = a.upper + b.upper + (a.lower > result.lower);
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return result;
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}
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inline u128 operator-(u128 a, u128 b) {
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u128 result;
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result.lower = a.lower - b.lower;
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result.upper = a.upper - b.upper - (a.lower < result.lower);
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return result;
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}
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u128 operator<<(u128 operand, int amount);
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u128 operator>>(u128 operand, int amount);
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} // namespace Dynarmic
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