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How to calculate area for a given schematic

IC Layout

 Hello! Every body, I am using cadence IC514 version and a 90nm PDK kit called "gpdk090".
My intention is to calculate area for a given schematic.
I wrote a procedure called "area()" which will calculate area in the current level (means for transistors, capacitors and resistors only).
Now I need to call this procedure for every instance which is not a transistor,cap or a resistor.
I wrote something like this........................
foreach( inst geGetEditCellView()~>instances
    when( inst~>purpose == "cell"
        if( inst~>libName == "gpdk090" then
            area()
        else
            label:
            cv1=dbOpenCellViewByType(inst~>libName inst~>cellName "schematic")
            foreach( inst1 cv1~>instances
                when( inst1~>purpose == "cell"
                    if( inst1~>libName == "gpdk090" then
                        area()
                    else
                        goto label
        ]
Can some body guide me in this way...
                Thanks in Advance...    
                                                                Prabhakar. K

Parents

  •  Hello, Sir! I have re-written the code but still I am not able to display the result in user units (i.e sq.microns)..

    I am in confusion.......Please kindly read this code and suggest me........

    ************************area.il****************************

     Ap = Ac = Ar = An = evalstring("0u")
    div_fac = evalstring("1f")
    count = 0
    procedure( area(cv)
        foreach(inst cv~>instances
        when( and(inst~>purpose == "cell" inst~>libName == "gpdk090")
            if(inst~>cellName == "pmos2v" then
                w1 = evalstring(cdfFormatFloatString(dbGetq(inst "w") "u"))
                l1 = evalstring(cdfFormatFloatString(dbGetq(inst "l") "u"))
                m1 = evalstring(dbGetq(inst "m"))    
                f1 = evalstring(dbGetq(inst "fingers"))    
                
                wp = w1 + evalstring("1.4u") ; (0.7u + 0.7u) oxide to nwell enclosure in vertical direction for "pmos2v"
                lp = (f1*l1) + ((f1-1)*evalstring("0.36u")) + evalstring("2u")
                ;0.36u is space b/w poly fingers
                ;(1u + 1u)  poly to nwell enclosure in horizontal direction for "pmos2v"
                areap = m1*wp*lp
                Ap = Ap + areap
                Ap1 = atof(cdfFormatFloatString(artMakeString(Ap) "p"))
            else
            if(inst~>cellName == "nmos2v" then
                w1 = evalstring(cdfFormatFloatString(dbGetq(inst "w") "u"))
                l1 = evalstring(cdfFormatFloatString(dbGetq(inst "l") "u"))
                m1 = evalstring(dbGetq(inst "m"))    
                f1 = evalstring(dbGetq(inst "fingers"))    
                
                wn = w1 + evalstring("0.6u") ; (0.3u + 0.3u) oxide to oxide_thk enclosure in vertical direction for "nmos2v"
                ln = (f1*l1) + ((f1-1)*evalstring("0.36u")) + evalstring("1.12u")
                ;0.36u is space b/w poly fingers
                ;(0.56u + 0.56u)  poly to oxide_thk enclosure in horizontal direction for "nmos2v"
                arean = m1*wn*ln
                An = An + arean
                An1 = atof(cdfFormatFloatString(artMakeString(An) "p"))
            else
            if( inst~>cellName == "mimcap" then
                c1 = evalstring(dbGetq(inst "c"))
                m1 = evalstring(dbGetq(inst "m"))
                
                areac = m1*c1
                ratio = areac/div_fac
                Ac = Ac + ratio
            else
            if( inst~>cellName == "resnsppoly" then
                w1 = evalstring(cdfFormatFloatString(dbGetq(inst "segW") "u"))
                l1 = evalstring(cdfFormatFloatString(dbGetq(inst "segL") "u"))
                m1 = evalstring(dbGetq(inst "segments"))
                
                wr = (m1*w1) + (m1-1)*evlastring("0.6u") + evalstring("0.56u")
                lr = l1 + evalstring("1.12u")
                arear = wr*lr
                Ar = Ar + arear
                Ar1 = atof(cdfFormatFloatString(artMakeString(Ar) "p"))
            else
            println("Nothing to calculate")
    );if
    );if
    );if
    );if
    );when
            when( and(inst~>purpose == "cell" inst~>libName != "gpdk090")
                cv1 = dbOpenCellViewByType(inst~>libName inst~>cellName "schematic")
                println(inst~>cellName)
                count = count + 1
                area(cv1) ;function call
                dbClose(cv1)
    );when
    );foreach
    );procedure

    area(geGetEditCellView())

    area = Ap1 + An1 + Ar1 + Ac
    printf("Number of instances/blocks in the design : %d \n" count)
    println(area)
    ;printf("The Total area of the design : %f \n" area)
    *************************end of area.il********************************

    And one more kind request How to get the area of each instance/block (which are in toplevel schematic only).

    Thanks in advance

                                 Prabhakr. K - Layout Design Engineer

Reply

  •  Hello, Sir! I have re-written the code but still I am not able to display the result in user units (i.e sq.microns)..

    I am in confusion.......Please kindly read this code and suggest me........

    ************************area.il****************************

     Ap = Ac = Ar = An = evalstring("0u")
    div_fac = evalstring("1f")
    count = 0
    procedure( area(cv)
        foreach(inst cv~>instances
        when( and(inst~>purpose == "cell" inst~>libName == "gpdk090")
            if(inst~>cellName == "pmos2v" then
                w1 = evalstring(cdfFormatFloatString(dbGetq(inst "w") "u"))
                l1 = evalstring(cdfFormatFloatString(dbGetq(inst "l") "u"))
                m1 = evalstring(dbGetq(inst "m"))    
                f1 = evalstring(dbGetq(inst "fingers"))    
                
                wp = w1 + evalstring("1.4u") ; (0.7u + 0.7u) oxide to nwell enclosure in vertical direction for "pmos2v"
                lp = (f1*l1) + ((f1-1)*evalstring("0.36u")) + evalstring("2u")
                ;0.36u is space b/w poly fingers
                ;(1u + 1u)  poly to nwell enclosure in horizontal direction for "pmos2v"
                areap = m1*wp*lp
                Ap = Ap + areap
                Ap1 = atof(cdfFormatFloatString(artMakeString(Ap) "p"))
            else
            if(inst~>cellName == "nmos2v" then
                w1 = evalstring(cdfFormatFloatString(dbGetq(inst "w") "u"))
                l1 = evalstring(cdfFormatFloatString(dbGetq(inst "l") "u"))
                m1 = evalstring(dbGetq(inst "m"))    
                f1 = evalstring(dbGetq(inst "fingers"))    
                
                wn = w1 + evalstring("0.6u") ; (0.3u + 0.3u) oxide to oxide_thk enclosure in vertical direction for "nmos2v"
                ln = (f1*l1) + ((f1-1)*evalstring("0.36u")) + evalstring("1.12u")
                ;0.36u is space b/w poly fingers
                ;(0.56u + 0.56u)  poly to oxide_thk enclosure in horizontal direction for "nmos2v"
                arean = m1*wn*ln
                An = An + arean
                An1 = atof(cdfFormatFloatString(artMakeString(An) "p"))
            else
            if( inst~>cellName == "mimcap" then
                c1 = evalstring(dbGetq(inst "c"))
                m1 = evalstring(dbGetq(inst "m"))
                
                areac = m1*c1
                ratio = areac/div_fac
                Ac = Ac + ratio
            else
            if( inst~>cellName == "resnsppoly" then
                w1 = evalstring(cdfFormatFloatString(dbGetq(inst "segW") "u"))
                l1 = evalstring(cdfFormatFloatString(dbGetq(inst "segL") "u"))
                m1 = evalstring(dbGetq(inst "segments"))
                
                wr = (m1*w1) + (m1-1)*evlastring("0.6u") + evalstring("0.56u")
                lr = l1 + evalstring("1.12u")
                arear = wr*lr
                Ar = Ar + arear
                Ar1 = atof(cdfFormatFloatString(artMakeString(Ar) "p"))
            else
            println("Nothing to calculate")
    );if
    );if
    );if
    );if
    );when
            when( and(inst~>purpose == "cell" inst~>libName != "gpdk090")
                cv1 = dbOpenCellViewByType(inst~>libName inst~>cellName "schematic")
                println(inst~>cellName)
                count = count + 1
                area(cv1) ;function call
                dbClose(cv1)
    );when
    );foreach
    );procedure

    area(geGetEditCellView())

    area = Ap1 + An1 + Ar1 + Ac
    printf("Number of instances/blocks in the design : %d \n" count)
    println(area)
    ;printf("The Total area of the design : %f \n" area)
    *************************end of area.il********************************

    And one more kind request How to get the area of each instance/block (which are in toplevel schematic only).

    Thanks in advance

                                 Prabhakr. K - Layout Design Engineer

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