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Compare two LEF files

Sherl

Hi all,

Is there any way I can compare 2 LEF files with each other?

Best regards,

Huy Hoang

Parents

  • I understand there's a tool from Si2 called something like lefdiff as part of the LefDef tools (Si2 is the standards organisation that covers OpenAccess and the LEF/DEF formats and parsers). You'd need to register with Si2 and download from there: www.Si2.org/OpenAccess 

    I don't believe Cadence provides any tool to do this.

    Regards,

    Andrew.

  • in reply to Andrew Beckett

    Hi Andrew,

    Thanks for the feedback, I tried searching in Si2 but still couldn't find a comparison tool between the two LEF files.
    I tried using cadence tool to import the LEF file into a library, then from the abstract view created by importing the LEF file, I created the GDS file, but that GDS file only contains shapes (rect, ...) and the blockage is not available.
    Do you have any ideas for comparing two LEF files?

    Best regards,

    Huy Hoang

Reply
  • in reply to Andrew Beckett

    Hi Andrew,

    Thanks for the feedback, I tried searching in Si2 but still couldn't find a comparison tool between the two LEF files.
    I tried using cadence tool to import the LEF file into a library, then from the abstract view created by importing the LEF file, I created the GDS file, but that GDS file only contains shapes (rect, ...) and the blockage is not available.
    Do you have any ideas for comparing two LEF files?

    Best regards,

    Huy Hoang

Children
  • in reply to Sherl

    There are various mentions of lefdiff and lefdefdiff in the README files, but the Si2 site is very hard to navigate and find anything - I couldn't locate the download. I see you've asked on the Si2 forums - that's probably the best solution.

    Other than that, my only thought was to do a LEF import in Virtuoso, and then stream out (to GDS) and do an XOR in a physical verification tool, but that would only check a subset of the info (you'd have to do some work to ensure that blockage info was streamed out to layers) - and this wouldn't check connectivity. So finding this comparison tool in the LEF/DEF standards probably is going to be your best option.

    Andrew.

  • in reply to Andrew Beckett

    Hi Andrew,

    Thank you for the information shared. Wish you a good day.

    Best regards,

    Huy Hoang

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