check spacing between nets with Diva DRC - Net tracing with Diva - Need inputs

Hi,

I am writing a diva drc deck to check for space between two nets (not shapes) A net can have a bunch of shapes that are connected.

I tried the below way to do this,

- trace the nets Net1_name and Net2_name.

- compare drc() between them

drcExtractRules(

m1 = geomOr("M1")

via1=geomOr(via1)

...

... upto top metal

;connect all shapes

geomConnect(

label( ("m1" "label") m1)

via(via1 m1 m2)

label( ("m2" "label") m2)

via(via2 m2 m3)

... up to top metal

)

;get the shapes that belong to the required net

netm1 = geomGetNet(m1 "Net1_Name")

netm2 = geomGetNet(m2 "Net2_Name")

.... upto top metal

fullNet1 = geomOr(netm1 metm2 ...)

netm1 = geomGetNet(m1 "Net2_Name")

netm2 = geomGetNet(m2 "Net2_Name")

.... upto top metal

fullNet2 = geomOr(netm1 metm2 ...)

;compare drc between them

saveDerived(drc(fullNet1 fullNet2 0<sep<10) "DRC error")

)

Problem with this approach is that it takes way too long to run for a big cell even though the nets I am looking for a very small. I found that the connect statement is the one that seems to take a lot of time as it tries to connect the whole layout which is not necessary.

Any suggestions on how to do this in an efficient way.

Thanks,

Naveen

Because you had filed two posts for the same issue in two different forums (the Forum Guidelines explicitly ask you not to do this - it creates confusion and means that nobody knows where to answer the question, and potentially doubles the effort needed to respond; please read the guidelines), I merged your two posts.

Probably the sensible thing would be to use something more modern and scalable than Diva, such as Assura (similar rules) or PVS. Diva is very old and not well-suited to large designs.

Regards,

Andrew.