1. Logic element circuitry comprising: selection circuitry for using a first selection circuit input signal to select one of second and third selection circuit input signals as a selection circuit output signal; logic circuitry for providing a logic circuit output signal which is a logical function of first and second logic circuit input signals; and programmable interconnection circuitry for allowing at least one of the first and second logic circuit input signals to be derived from the selection circuit output signal or a signal from outside the logic element.