A high-frequency decimal multiplier

Decimal arithmetic is regaining popularity in the computing community due to the growing importance of commercial, financial, and Internet-based applications, which process decimal data. This paper presents an iterative decimal multiplier, which operates at high clock frequencies and scales well to large operand sizes. The multiplier uses a new decimal representation for intermediate products, which allows for a very fast two-stage iterative multiplier design. Decimal multipliers, which are synthesized using a 0.11 micron CMOS standard cell library, operate at clock frequencies close to 2 GHz. The latency of the proposed design to multiply two n-digit BCD operands is (n+8) cycles with a new multiplication able to begin every (n+1) cycles.