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 Best flow to map most key points before compare 

Last post Thu, Mar 29 2012 11:50 PM by AntonioL. 2 replies.
Started by AntonioL 28 Mar 2012 02:24 AM. Topic has 2 replies and 2866 views
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  • Wed, Mar 28 2012 2:24 AM

    • AntonioL
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    • Joined on Mon, Jun 22 2009
    • Agrate Brianza, Milan
    • Posts 4
    • Points 65
    Best flow to map most key points before compare Reply

     Hi All,

    I saw that Conformal has "most than 1/3 of key-points mis-matched by names".

    So I want to help it to map more key-points.

    I used default value for set_mapping_method for my 1st Gate2Gate run.

    Could I use different set_mapping_method commands incrementally to map most key-points?

     

    Which is the best flow to do this in your opinion?

     

    • Post Points: 20
  • Thu, Mar 29 2012 2:38 PM

    • tstark
    • Top 200 Contributor
    • Joined on Mon, Jul 28 2008
    • San Jose, CA
    • Posts 40
    • Points 455
    Re: Best flow to map most key points before compare Reply
    Hi, Antonio.

    From your post, I’m not sure if your design is NEQ.

    If your design is EQ, you can just let LEC figure out the mapping. The tool might run a little longer to resolve the mapping but it will be automatic.

    If your design is not-EQ or mapping takes a long time first consider why the key-points are not mapping by name. Ask yourself, between the two gate netlists, what could have been optimized or changed? (E.g. clock gating changes, register cloning, etc.) To show the key points that aren’t mapping by name run with set_mapping_method –name only.

    This is described in the Cadence support post (solution) here:

    http://support.cadence.com/wps/mypoc/cos?uri=deeplinkmin:ViewSolution;solutionNumber=1820207

    Mapping consists of two stages. One is a quick name-based mapping and the second is a functional mapping. Functional mapping takes longer. (This is why you may see mapping quickly go to 98% but then take longer to resolve the last 2%. )

    Renaming rules aren’t often required but in this case it could help. (This is also described in the previous link.)

    Finally, if the mapping is bad then you can try remapping or phase mapping (debug shows this is needed). This is described here:

    http://support.cadence.com/wps/mypoc/cos?uri=deeplinkmin:ViewSolution;solutionNumber=11514542

    Let the list know if this helped.

     

    -Noel
    • Post Points: 20
  • Thu, Mar 29 2012 11:50 PM

    • AntonioL
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    • Joined on Mon, Jun 22 2009
    • Agrate Brianza, Milan
    • Posts 4
    • Points 65
    Re: Best flow to map most key points before compare Reply

     Thanks for your reply.

     

    It's exactly I want.

    My design is NonEq and the runtime is very big but I wanted to discover if I can help LEC to map more faster the key points just to reduce the runtime.

     Regards 

    • Post Points: 5
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Started by AntonioL at 28 Mar 2012 02:24 AM. Topic has 2 replies.