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 Incomprehensible warning when running "write hier_compare dofile" 

Last post Mon, Mar 12 2007 4:58 AM by archive. 6 replies.
Started by archive 12 Mar 2007 04:58 AM. Topic has 6 replies and 1650 views
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  • Mon, Mar 12 2007 4:58 AM

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    Incomprehensible warning when running "write hier_compare dofile" Reply

    Hi

    When I ran write hier_compare command, I found the tool firing the following warning. May I know the reason for such a behavior. 

    Warning: Golden or Revised have modules with number of instances less than 50. Skip it for hierarchical comparison

    Thanks
    Prasad.


    Originally posted in cdnusers.org by anssprasad
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  • Mon, Mar 12 2007 5:03 AM

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    RE: Incomprehensible warning when running "write hier_compare dofile" Reply

    In order to decrease the number of sub-blocks to comapre Conformal has a threshold.
    All module with number of primitives less than the treshold are flattened and the "father" module is compared. This is bad syntax of the message, actualy nothing is skipped, don't worry :)


    Originally posted in cdnusers.org by Stalker
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  • Mon, Mar 12 2007 5:16 AM

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    RE: Incomprehensible warning when running "write hier_compare dofile" Reply

    Hi Maxim,

    According what I see in the dofile generated by the tool as a result of the command I used: -

    write hier_compare dofile abrisccore3.one -module abrisccore3 abrisccore3 -hier -noexact_pin_match

    I don't find the modules it listed in the transcript following this warning. I am afraid they are really being skipped from comparison.

    Thanks
    Prasad.


    Originally posted in cdnusers.org by anssprasad
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  • Mon, Mar 12 2007 5:31 AM

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    RE: Incomprehensible warning when running "write hier_compare dofile" Reply

    Hi Prasad,
    These modules are not written into dofile, but the mapped points of these modules are compared together with the mapped points of the "parent" module - the one which instantiate the "skipped" module.
    Again, no key point is skipped from comparrison.
    You can send this warning to Cadence support and ask them.

    Regards,


    Originally posted in cdnusers.org by Stalker
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  • Mon, Mar 12 2007 5:49 AM

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    RE: Incomprehensible warning when running "write hier_compare dofile" Reply

    Hi Prasad

    Maxim is correct: the module simply gets compared as part of its parent. Saying 'skipped' is bad syntax and there's been internal discussions about changing that.

    The default threshold is 50 but that can be changed using the -threshold switch. There's usually no reason to do that except for library qualification, where you do want verification to be run, separately, on every single cell.

    Chrystian


    Originally posted in cdnusers.org by croy
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  • Mon, Mar 12 2007 5:50 AM

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    RE: Incomprehensible warning when running "write hier_compare dofile" Reply

    Thanks Maxim,

    I got you. But, is there any way to tell the tool not to bother itself about simplifying my work!!

    Prasad.


    Originally posted in cdnusers.org by anssprasad
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  • Mon, Mar 12 2007 5:53 AM

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    RE: Incomprehensible warning when running "write hier_compare dofile" Reply

    Thanks Chrystian, I think that dispels all my doubts.


    Originally posted in cdnusers.org by anssprasad
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Started by archive at 12 Mar 2007 04:58 AM. Topic has 6 replies.