The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 08, 2012
Filed:
Jan. 14, 2008
Applicants:
Jianhua Liu, San Jose, CA (US);
Gregg William Baeckler, San Jose, CA (US);
Inventors:
Jianhua Liu, San Jose, CA (US);
Gregg William Baeckler, San Jose, CA (US);
Assignee:
Altera Corporation, San Jose, CA (US);
Primary Examiner:
Int. Cl.
CPC ...
G06F 7/487 (2006.01);
U.S. Cl.
CPC ...
Abstract
An improved method and apparatus for performing floating-point division is disclosed. In a particular embodiment, fractional operands are pre-scaled and an estimate of a reciprocal of the pre-scaled fractional divisor is obtained from a lookup table using a portion of the bits of the pre-scaled fractional divisor. This value is used to scale the fractional operands and a multiply-add operation is used based on principles of series expansion to compute a final result with an acceptable degree of accuracy.