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. 01, 2001
Filed:
Jul. 15, 1998
Timothy A. Elliott, Austin, TX (US);
G. Glenn Henry, Austin, TX (US);
IP-First, L.L.C., Fremont, CA (US);
Abstract
An apparatus and method for performing single precision multiplication in a microprocessor are provided. The apparatus includes translation logic and extended precision floating point execution logic. The translation logic decodes a single precision multiply instruction into an associated micro instruction sequence directing the microprocessor to fetch a single precision operand from memory and convert it to extended precision format. In addition, the associated micro instruction sequence directs floating point execution logic employing a dual pass multiplication unit to skip a pass associated with computing an insignificant partial product. This insignificant partial product would otherwise result from multiplication of a multiplicand by zeros which are appended to the significand of the fetched operand when it is converted to extended precision format.