bit_width.hpp

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// SPDX-License-Identifier: BSL-1.0
 
#ifndef TETL_BIT_BIT_WIDTH_HPP
#define TETL_BIT_BIT_WIDTH_HPP
 
#include <etl/_bit/countl_zero.hpp>
#include <etl/_concepts/builtin_unsigned_integer.hpp>
#include <etl/_limits/numeric_limits.hpp>
 
namespace etl {

template <etl::builtin_unsigned_integer UInt>
[[nodiscard]] constexpr auto bit_width(UInt x) noexcept -> int
{
    return etl::numeric_limits<UInt>::digits - etl::countl_zero(x);
}
 
} // namespace etl
 
#endif // TETL_BIT_BIT_WIDTH_HPP