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Search all cells in all libraries for layout instance

Michael Kolesnik

I would like some hints for SKILL code.

I am writing a function which can be summarized " where are all the places this instance is used".

I want to search all cells in all libraries .

The only code I have seen that is close are these two:

CCSfindInstCellLib = find a instance in ONE library

CCSFindCellInLibrary = finds a CELL in all libraries 

I have been trying to combine these two but have no luck so far.

My plan is something like this:

foreach(library...

       foreach(cell in library... search for instance "inv2"

            print the results.

Parents

  • Not sure the criteria of how you want to search of whole string or substring, but will provide a skeleton to started

    findCellStr = substring searching

    schLayBool = t schematic nil layout
    findCellStringAllLib("INV" t)

    procedure(findCellStringAllLib(findCellStr schLayBool)
    let( (cellDb fndList instList)
    foreach(lib sort(ddGetLibList()~>name nil)
        printf("Searching %s\n" lib)
       foreach(cName ddGetObj(lib)~>cells~>name
           if(schLayBool then
                 when(ddGetObj(lib cName "schematic")
                          cellDb = dbOpenCellViewByType(lib cName "schematic" "schematic" "r")
                          instList = setof(i cellDb~>instances dbIsId(i) && rexMatchp(findCellStr i~>cellName))~>cellName)
          else when(ddGetObj(lib cName "layout")
                        cellDb = dbOpenCellViewByType(lib cName "layout" "maskLayout" "r")
                        instList = setof(i cellDb~>instances dbIsId(i) && rexMatchp(findCellStr i~>cellName))~>cellName)
    )

    when(instList
               fndList = cons(strcat(lib " " cName) fndList))
               instList = nil
    ))

    if(fndList then
            printf("%L\n\n" sort(fndList nil))
    else printf("%s not found\n" findCellStr))
    )); end of findCellStringAllLib

Reply

  • Not sure the criteria of how you want to search of whole string or substring, but will provide a skeleton to started

    findCellStr = substring searching

    schLayBool = t schematic nil layout
    findCellStringAllLib("INV" t)

    procedure(findCellStringAllLib(findCellStr schLayBool)
    let( (cellDb fndList instList)
    foreach(lib sort(ddGetLibList()~>name nil)
        printf("Searching %s\n" lib)
       foreach(cName ddGetObj(lib)~>cells~>name
           if(schLayBool then
                 when(ddGetObj(lib cName "schematic")
                          cellDb = dbOpenCellViewByType(lib cName "schematic" "schematic" "r")
                          instList = setof(i cellDb~>instances dbIsId(i) && rexMatchp(findCellStr i~>cellName))~>cellName)
          else when(ddGetObj(lib cName "layout")
                        cellDb = dbOpenCellViewByType(lib cName "layout" "maskLayout" "r")
                        instList = setof(i cellDb~>instances dbIsId(i) && rexMatchp(findCellStr i~>cellName))~>cellName)
    )

    when(instList
               fndList = cons(strcat(lib " " cName) fndList))
               instList = nil
    ))

    if(fndList then
            printf("%L\n\n" sort(fndList nil))
    else printf("%s not found\n" findCellStr))
    )); end of findCellStringAllLib

Children
  • in reply to psill000

    That worked perfect except for one unseen situation - during the run, memory usage jumped from 2gb to 27gb before I stopped it. It was probably due to the "dbOpen" function which loads the cell into memory, and was loading hundreds of cells into memory. I will see if there is a purge command to purge each cell after it is done.

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