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:
Jan. 17, 2006
Filed:
Sep. 23, 2003
Marc Tremblay, Menlo Park, CA (US);
Chandramouli Banerjee, Fremont, CA (US);
Marc Tremblay, Menlo Park, CA (US);
Chandramouli Banerjee, Fremont, CA (US);
Sun Microsystems, Inc., Sunnyvale, CA (US);
Abstract
The present invention provides an efficient implementation of multiprecision arithmetic, such as for a microprocessor. For example, an implementation of multiprecision arithmetic is provided that eliminates condition codes, such as condition codes for a carry bit and a borrow bit, and eliminates an add-with-carry instruction for multiprecision addition and a subtract-with-borrow instruction for multiprecision subtraction. In one embodiment, a method includes separately performing a first one or more arithmetic operations and a second one or more arithmetic operations. The second arithmetic operations indicate if the first arithmetic operations cause a carry condition or if the first arithmetic operations cause a borrow condition. The one or more results of the first and second arithmetic operations are then provided. The first and second arithmetic operations can be executed in parallel on a microprocessor.