Reversible Barrel Shifters

Data shifting is required in many key computer operations from address decoding to computer arithmetic. Full barrel shifters are often on the critical path, which has led most research to be directed toward speed optimizations. With the advent of quantum computer and reversible logic, design and implementation of all devices in this logic has received more attention. This paper proposes a reversible implementation of a barrel shifter, and also evaluation of its quantum cost is presented.