Bitwise operations

#include <static_math/bit.h>

The functions in this header correspond to ones in the C++20 standard library header . Those are mostly bitwise operations that work on unsigned integer types.

Integral power-of-2 operations

template<typename Unsigned>
constexpr auto ispow2(Unsigned x) noexcept
    -> bool;

Computes whether the unsigned integer x is a power of two.

This function is overloaded so that it can handle integral constants.

template<typename Unsigned>
constexpr auto ceil2(Unsigned x) noexcept
    -> Unsigned;

Computes the minimal value y such that ispow2(y) is true and y >= x; if y is not representable as a value of type Unsigned, the result is an unspecified value.

This function is overloaded so that it can handle integral constants.

template<typename Unsigned>
constexpr auto floor2(Unsigned x) noexcept
    -> Unsigned;

If x == 0, returns 0; otherwise computes the maximal value y such that ispow2(y) is true and y <= x.

This function is overloaded so that it can handle integral constants.

template<typename Unsigned>
constexpr auto log2p1(Unsigned x) noexcept
    -> Unsigned;

If x == 0, returns 0; otherwise one plus the base-2 logarithm of x, with any fractional part discarded.

This function is overloaded so that it can handle integral constants.