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:
Sep. 06, 2005
Filed:
Feb. 01, 2002
Robert Rogenmoser, Santa Clara, CA (US);
Michael C. Kim, Fremont, CA (US);
Robert Rogenmoser, Santa Clara, CA (US);
Michael C. Kim, Fremont, CA (US);
Broadcom Corporation, Irvine, CA (US);
Abstract
A floating point unit includes a multiplier, an approximation circuit, and a control circuit coupled to the multiplier and the approximation circuit. The approximation circuit is configured to generate an approximation of a difference of the first result from the multiplier and a constant. The control circuit is configured to approximate a function specified by a floating point instruction provided to the floating point unit for execution using an approximation algorithm. The approximation algorithm comprises at least two iterations through the multiplier and optionally the approximation circuit. The control circuit is configured to correct the approximation from the approximation circuit from a first iteration of the approximation algorithm during a second iteration of the approximation algorithm by supplying a correction vector to the multiplier during the second iteration. The multiplier is configured to incorporate the correction vector into the first result during the second iteration.