Patent · US Active

Fused multiply-adder with booth-encoding

US9122517B2 · kind B2 · utility

3Cited by

5References

8Claims

0Family size

Assignee

International Business Machines Corporation · US

Inventors

Maarten J. Boersma · Holzgerlingen, DE
Klaus M. Kroener · Ehningen, DE
Christophe J. Layer · Eppelheim, DE
Silvia M. Mueller · Altdorf, DE

Key dates

Filing date	Jun 11, 2012
Grant date	Sep 1, 2015
Priority date	—
Expiry date	Jan 14, 2034

Classification

Technology area (CPC G)Physics
CPC primaryG06F7/5443
WIPO fieldComputer technology
WIPO sectorElectrical engineering

Abstract

A fused multiply-adder is disclosed. The fused multiply-adder includes a Booth encoder, a fraction multiplier, a carry corrector, and an adder. The Booth encoder initially encodes a first operand. The fraction multiplier multiplies the Booth-encoded first operand by a second operand to produce partial products, and then reduces the partial products into a set of redundant sum and carry vectors. The carry corrector then generates a carry correction factor for correcting the carry vectors. The adder adds the redundant sum and carry vectors and the carry correction factor to a third operand to yield a final result.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.