A novel technique for fast multiplication

In this paper we present the design of a new high-speed multiplication unit . The design is based on non-overlapped scanning of 3-bit fields of the mul tiplier. In this technique the partial products of the multiplicand and thr ee bits of the multiplier are pre-calculated using only hardwired shifts. T hese partial products are then added using a tree of carry-save-adders, and finally the sum and carry vectors are added using a carry-lookahead adder. In the case of 2's complement multiplication the tree of carry-save-adders also receives a correction output produced in parallel with the partial pr oducts. The algorithm is modelled in a hardware description language and it s VLSI chip implemented. The performance of the new design is compared with that of other recent ones proposed in literature.