ilog2.hpp

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// SPDX-License-Identifier: BSL-1.0
// SPDX-FileCopyrightText: Copyright (C) 2023 Tobias Hienzsch
 
#ifndef TETL_MATH_ILOG2_HPP
#define TETL_MATH_ILOG2_HPP
 
#include <etl/_concepts/integral.hpp>
 
namespace etl {
 
template <integral Int>
[[nodiscard]] constexpr auto ilog2(Int x) noexcept -> Int
{
    auto result = Int(0);
    for (; x > Int(1); x >>= Int(1)) {
        ++result;
    }
    return result;
}
 
} // namespace etl
 
#endif // TETL_MATH_ILOG2_HPP