The barrel shifter of the present invention comprises a latch circuit of (m+n) bit, a register for indicating an effective bit length retained in the latch circuit, a selector for connecting the variable length code of maximum n bit with the latch circuit and a counting circuit for counting shifting...http://www.google.fr/patents/US5532949?utm_source=gb-gplus-shareBrevet US5532949 - Barrel shifter
