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:
Oct. 23, 2012
Filed:
Jul. 28, 2010
Bin Liu, Los Angeles, CA (US);
Zhiru Zhang, Los Angeles, CA (US);
Jason Cong, Pacific Palisades, CA (US);
Bin Liu, Los Angeles, CA (US);
Zhiru Zhang, Los Angeles, CA (US);
Jason Cong, Pacific Palisades, CA (US);
Xilinx, Inc., San Jose, CA (US);
Abstract
A method for implementing soft constraints in scheduling comprises receiving a description of circuit behavior. The description is un-timed. A scheduling solution is generated for use in scheduling the description. The scheduling solution includes scheduling variables and an objective function. The scheduling variables schedule the time of at least one operation. The objective function includes a penalty term and constraints comprising at least one hard constraint and at least one soft constraint. The constraints are created on the scheduling variables. The penalty term comprises a slack variable representing violations of the constraints. The penalty term measures the design cost of violating the soft constraint. Following generation of the scheduling solution, the description is scheduled by applying the scheduling solution to the description. Timing information of the description is provided as an output of the scheduling.