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Reassign a layout instance with SKILL

TravisMN

I am attempting to reassign an instance in a layout with SKILL, but it does not appear to be saving upon reassignment. Here is my code:

procedure(senseAmpBuilder(sourceLib destLib sourceCell csvFile)
     sourceLibId = ddGetObj(sourceLib)
     destLibId = ddGetObj(destLib)

    sourceInst = dbOpenCellViewByType(sourceLibId "diff_000101" "layout" "maskLayout" "a")
    destCvId = dbOpenCellViewByType(destLibId "TG2" "layout" "maskLayout" "a")

    foreach(inst destCvId~>instances
        printf("\t\tFound instance %L\n" inst~>cellName)
        if(inst~>cellName == "base_diff"
        then
            printf("\t\tReplacingbase_diff with %L\n" "diff_000101")
            printf("\nsaveInst~>cellName: %L\tinst~>cellName: %L\n" sourceInst~>cellName inst~>cellName)
            inst = sourceInst
            printf("\nsaveInst~>cellName: %L\tinst~>cellName: %L\n" sourceInst~>cellName inst~>cellName)
            printf("\t\tReplaced lyx_pm_sa_base_diff with %L\n" inst~>cellName)
         )
     )

    dbSave(destCvId)
    dbClose(destCvId)
    printf("\nJob Done!\n")
)

My terminal prints the following:

function senseAmpBuilder redefined
t
        Found instance "base_diff"
        Replacing base_diff with "diff_000101"

saveInst~>cellName: "diff_000101"    inst~>cellName: "base_diff"

saveInst~>cellName: "diff_000101"    inst~>cellName: "diff_000101"
        Replaced base_diff with "diff_000101"
        Found instance "base_latch"
        Found instance "base_diffpu"
        Found instance "nor2_atd"
        Found instance "nor2_atd"

Job Done!
t

I am not getting any errors and since my cellName changes, it appears to be reassigned. But when I check the layout, there are no changes, even though I am saving destCvId at the end. Is there something I do not understand or another way I should be reassigning the layout instances?

Parents

  • Your code is not actually replacing anything. The line:

                inst = sourceInst

    does not change anything in the database - it merely assigns the variable inst to be equal to the database object stored in the variable sourceInst. The original instantiation in the database itself remains unchanged. What you need to do is:

                inst~>master = sourceInst

    Note too that your variable names are a bit confusing - sourceInst is not actually an instance - it's a cellView (or a master) - so calling it sourceInst is a bit misleading.

    Regards,

    Andrew

Reply

  • Your code is not actually replacing anything. The line:

                inst = sourceInst

    does not change anything in the database - it merely assigns the variable inst to be equal to the database object stored in the variable sourceInst. The original instantiation in the database itself remains unchanged. What you need to do is:

                inst~>master = sourceInst

    Note too that your variable names are a bit confusing - sourceInst is not actually an instance - it's a cellView (or a master) - so calling it sourceInst is a bit misleading.

    Regards,

    Andrew

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