bit_width_constexpr#

Fully qualified name: carb::cpp::bit_width_constexpr

Defined in carb/cpp/Bit.h

template<class T>
constexpr int carb::cpp::bit_width_constexpr(

T val,

) noexcept#

Returns the number of bits needed to store val, or 0, if val is 0.

Same as 1 + floor(log2(x)).

Note

Unlike bit_width(), this function is constexpr as it does not make use of intrinsics. Therefore, at runtime it is recommended to use bit_width() instead of this function.

Template Parameters:

T – An unsigned integral type

Parameters:

val – An unsigned integral value

Returns:

The number of bits needed to store val