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SKILL script for instance extraction

RaghavendraN

Hi team,

I have gone through the following link where instances are obtained based on cell name from the entire hierarchy. Here , we need to provide entire cell name. 

https://support.cadence.com/apex/ArticleAttachmentPortal?id=a1Od0000001lHqtEAE&pageName=ArticleContent

For example, if i want to use only starting three letters of the cell name and let SKILL Code find what cells are starting with those 3 letters and their respective instances(for each cell starting with those 3 letters) in hierarchy, how should the modified script look like ?

  • Hi,

    You need to replace one line in the code (line 117) as below:

    ;; when((inst~>cellName == targetCellName)
    when( rexMatchp(strcat("^" targetCellName) inst~>cellName)

    Regards,

    Saloni

  • in reply to Saloni Chhabra

    If I want to program the starting matching characters, how should I modify this ? "^" matches the starting characters  but does not give info about how many characters it matches ? (3 or 4  or more characters)

  • in reply to RaghavendraN

    I don't think I understand your question. The code change I suggested is expecting you to provide a pattern (3 or 4 or more characters or the full cell name) as input, and this pattern will be checked in the name of the cell. e.g.

    CCSPrintTable2(CCSFindCellInHier("nmo"))

    or

    CCSPrintTable2(CCSFindCellInHier("nmos"))

    rexMatchp will be executed as below :

    rexMatchp("^nmo" "nmos2v") -> t

    rexMatchp("^nmos" nmos2v") -> t

    If your specified pattern was "mos", then the match will fail:

    rexMatchp("^mos" "nmos2v") -> nil

  • in reply to Saloni Chhabra

    Lets say that we have 3 cell names dffq_f1 , dffpcq_f1 and dffpcq_f4. If I use the command pointed by you CCSPrintTable2(CCSFindCellInHier("dff")), I will see instances from all the 3 cells. Now, if I want to filter only instances pointed by two cells (second(dffpcq_f1) and third(dffpcq_f4)), what command should I use ? If I use command CCSPrintTable2(CCSFindCellInHier("dffp")), it will point instance from all the 3 above cells as the first 3 letter dff is matching with all the 3 cell names. 

  • in reply to RaghavendraN

    No, CCSPrintTable2(CCSFindCellInHier("dffp")) will return only dffpcq_f1 and dffpcq_f4 as the match command looks for the 'entire' string.

    An example -  my design has 3 cells, 2 instances of cell 'cccs' and 1 instance of 'ccvs'.

    CCSPrintTable1(CCSFindCellInHier("cc")) returns all 3 instances.

    CCSPrintTable1(CCSFindCellInHier("ccv")) returns only 1 instance.

  • in reply to Saloni Chhabra

    That makes sense. This is what I was looking for. Thanks for the quick response Saloni.

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