function digitreverse4(u32) shuffle¶

template <size_t bits>
constexpr KFR_INTRINSIC u32 digitreverse4(u32 x) { … }

Reverses the digits of the given unsigned integer in base-4 (quaternary), using the lowest bits digits.

Useful for radix-4 FFT or similar algorithms.

Template parameters

bits	Number of base-4 digits to reverse.

Parameters

x	The input 32-bit unsigned integer.

Returns

The base-4 digit-reversed integer.