Invention Grant
- Patent Title: Logic design verification techniques for liveness checking with retiming
- Patent Title (中): 重新定义活动检查的逻辑设计验证技术
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Application No.: US12394560Application Date: 2009-02-27
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Publication No.: US08255848B2Publication Date: 2012-08-28
- Inventor: Jason R. Baumgartner , Gabor Bobok , Paul Joseph Roessler , Mark Allen Williams
- Applicant: Jason R. Baumgartner , Gabor Bobok , Paul Joseph Roessler , Mark Allen Williams
- Applicant Address: US NY Armonk
- Assignee: International Business Machines Corporation
- Current Assignee: International Business Machines Corporation
- Current Assignee Address: US NY Armonk
- Agency: Yudell Isidore Ng Russell, PLLC
- Main IPC: G06F9/455
- IPC: G06F9/455 ; G06F17/50

Abstract:
A technique for verification of a retimed logic design using liveness checking includes assigning a liveness gate to a liveness property for an original netlist and assigning a fairness gate to a fairness constraint for the original netlist. In this case, the fairness gate is associated with the liveness gate and is asserted for at least one time-step during any valid behavioral loop associated with the liveness gate. The original netlist is retimed, using a retiming engine, to provide a retimed netlist. The liveness and fairness gates of the retimed netlist are retimed such that a lag of the fairness gate is no greater than a lag of the liveness gate. Verification analysis is then performed on the retimed netlist. Finally, when the verification analysis yields a valid counter-example trace for the retimed netlist, a liveness violation for the original netlist is returned.
Public/Granted literature
- US20100223584A1 Logic Design Verification Techniques for Liveness Checking With Retiming Public/Granted day:2010-09-02
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