The present invention relates to a look-up table comprising a plurality of register signals (r0-r3); a plurality of inputs signals (A, A′, B, B′); and at least one output signal (Y); and a plurality of pass gates, wherein at least a first pass gate of the plurality of pass gates is controlled by at least a first input signal of the plurality of input signals, and by at least a first register signal, of the plurality of register signals, such that the register signal has priority over the input signal on the operation of the first pass gate.