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lizzie
44 lines
1.1 KiB
C++
44 lines
1.1 KiB
C++
// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
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// SPDX-License-Identifier: GPL-3.0-or-later
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// SPDX-FileCopyrightText: Copyright 2018 yuzu Emulator Project
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// SPDX-License-Identifier: GPL-2.0-or-later
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#pragma once
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#include <bit>
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#include <climits>
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#include <cstddef>
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#include <type_traits>
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#include "common/common_types.h"
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namespace Common {
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/// Gets the size of a specified type T in bits.
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template <typename T>
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requires std::is_integral_v<T>
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[[nodiscard]] constexpr std::size_t BitSize() {
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return std::size_t(sizeof(T) * CHAR_BIT);
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}
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template<typename T>
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requires std::is_integral_v<T>
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[[nodiscard]] constexpr T Log2Floor(const T value) {
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return std::bit_width(value) - 1;
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}
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template<typename T>
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requires std::is_integral_v<T>
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[[nodiscard]] constexpr T Log2Ceil(const T value) {
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return std::bit_width(value - 1);
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}
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template <size_t bit_index, typename T>
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requires (std::is_integral_v<T> && bit_index < BitSize<T>())
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[[nodiscard]] constexpr bool Bit(const T value) {
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return (T(value >> bit_index) & T(1)) == T(1);
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}
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} // namespace Common
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