Patent · US Active

Shifter with all-one and all-zero detection using a portion of partially shifted vector and shift amount in parallel to generated shifted result

US8332453B2 · kind B2 · utility

0Cited by

6References

15Claims

0Family size

Assignee

International Business Machines Corporation · US

Inventors

Maarten J. Boersma · Holzgerlingen, DE
Silvia M. Mueller · Altdorf, DE
Jochen Preiss · Eppelheim, DE
Holger Wetter · Holzgerlingen, DE

Key dates

Filing date	Dec 10, 2008
Grant date	Dec 11, 2012
Priority date	—
Expiry date	Oct 11, 2031

Classification

Technology area (CPC G)Physics
CPC primaryG06F7/02
WIPO fieldComputer technology
WIPO sectorElectrical engineering

Abstract

A shifter that includes a plurality of shift stages positioned within the shifter, and receiving and shifting input data to generate a shifted result, and a detection circuit coupled at an input of a final shift stage of the plurality of shifters, in a final stage within the shifter. The detection circuit receives a partially shifted vector at the input of the final shift stage along with a predetermined shift amount, and performing an all-one or all-zero detection operation using a portion of the partially shifted vector and the predetermined shift amount, in parallel, to a shifting operation performed by the final shift stage to generate the shifted result.

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