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QRC: extraction fails due to ports names including the "+" character

dontpanic

Hi! The QRC extraction of various cells is failing due to them having port names that use the "+" character. For example, In the QRC log file I get:

+ERROR (LBMISC-215479): at "agds2rcx": syntax error in file /path/to/my/svdb/my_cellname.ports because of an invalid character '+' at line 12

(and in the my_cellname.ports file I see that line corresponds to the entry associated to a port named "clock_latch_N+1").

Is is possible to make PVS/QRC support these port names with the "+" character? We have many cells affected by this, so we'd like to avoid the pain/risk of changing them now (tapeout time).

Thanks and regards, Jorge.

  • Quek

    Hi Jorge

    "+" is not a legal character in spice so even if the extraction succeeds, the generated spice netlist may also create error during simulation. It would be best for you to rename the port. E.g. clock_latch_Np1


    Best regards
    Quek

  • dontpanic
    in reply to Quek

    Thanks for your reply, Quek. We normally use the extracted view as output for the extraction (not spice netlists), so in this particular case that probably shouldn't be really be a limitation.

    But if there's just no workaround for this issue, I guess I'll have no other choice than renaming all those ports!

    Thanks and regards, Jorge.

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