32 lines
711 B
C++
32 lines
711 B
C++
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// This file is part of the mcl project.
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// Copyright (c) 2022 merryhime
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// SPDX-License-Identifier: MIT
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#pragma once
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#include "mcl/bitsizeof.hpp"
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#include "mcl/concepts/bit_integral.hpp"
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#include "mcl/stdint.hpp"
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namespace mcl::bit {
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template<BitIntegral T>
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constexpr T rotate_right(T x, size_t amount) {
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amount %= bitsizeof<T>;
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if (amount == 0) {
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return x;
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}
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return static_cast<T>((x >> amount) | (x << (bitsizeof<T> - amount)));
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}
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template<BitIntegral T>
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constexpr T rotate_left(T x, size_t amount) {
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amount %= bitsizeof<T>;
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if (amount == 0) {
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return x;
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}
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return static_cast<T>((x << amount) | (x >> (bitsizeof<T> - amount)));
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}
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} // namespace mcl::bit
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