Multifunction register

A multifunction data storage register is provided having at least one first register cell having a first input multiplexer for selecting between two input signals responsive to one or more control signals and having a first output signal, a first input exclusive not OR circuit having a first input connected to said first output signal of said first input multiplexer and a second input connected to a cell output signal and having a third output signal, a first shift register latch having an input connected to said third output signal of said first input exclusive not OR circuit and having a fourth output signal, a first output exclusive not OR circuit having a first input connected to said fourth output signal of said first shift register latch and a second input connected to a feedback signal and having a fifth output signal, and a first output multiplexer for selecting between said fifth output signal and said fourth output signal responsive to said one or more control signals and having a first cell output signal, and at least one second register cell having a second input multiplexer for selecting between two input signals responsive to said one or more control signals and having a seventh output signal, a second input exclusive not OR circuit having a first input connected to said seventh output signal of said second input multiplexer and a second input connected to a cell output signal and having an eighth output signal, and a second shift register latch having an input connected to said eighth output signal of said second input exclusive not OR circuit and having a second cell output signal.