Find a overlap of two layers if that layer present in PCell also

Hi Mahesh,

You could try the dbGetOverlaps() function:

dbGetOverlaps( 
  d_cellView 
  l_bBox 
  [ l_layerPurposePair ]
  [ lx_level ] 
  [ g_doRowCol ]
)

Returns a list of all the objects (such as, shapes, instances, and mosaics) in a cellview whose bounding boxes overlap the area specified by l_bBox. The overlap includes bounding boxes that are enclosed by, butt against, or intersect with l_bBox. If the object comes from a lower level in the hierarchy, instead of a plain object ID, the object is represented by a list (potentially a nested list, if it comes from more than one level down). Each level of the list has the ID of the instance in the corresponding level in the hierarchy. For example, if there is a rectangle in a master cellview two levels down, for this rectangle, in the top cellview, dbGetOverlaps will return a nested list.

There are other functions like dbProduceOverlap(), that latter might be simpler than dbGetOverlaps() as it is only concerned with shapes (dbShapeQuery might be worth a look too). Look for examples of these either in this forum or from Cadence's support page.

I hope this helps!

Regards,

Lawrence.

Hi Lawrence,

Thanks for your quick response and your comment on this.
I am extremely sorry to say one main point in this.
if any two layers overlaps in same instance ignore and any one layer like shape or lpp then it should violate.

Example:
both od and nt_n is present in Pcell.
* od is overlapping with nt_n in cell itself it should not show.

if od/nt_n shapes are overlapping with pcell layer, then it should show.

as per your comment everything will show, I need to filter out as I Mentioned *
please do the needful.

Thanks,
Mahesh

Mahesh,

I agree with Lawrence - maybe this is a cultural thing, but (other than it not being standard outside of Indian English) it did suggest that you were expecting Lawrence (who doesn't work for Cadence, just kindly helping out colleagues from other organisations) to solve your problem for you.

You might want to look at the "abe" (Advanced Boolean Engine) functions, such as abeLayerAnd. These were added in IC617, but I wouldn't use them if you're using the first few ISRs. Probably ISR8 and later (roughly speaking) should be OK, because the interface to them changed slightly because they were inconsistent with other functions in SKILL. The code below however isn't dependent upon any of these arguments that changed. These can find shapes through the hierarchy (the default behaviour) - for example:

abeInit(geGetEditCellView())
od=abeLayerFromCellView("od")
nt_n=abeLayerFromCellView("nt_n")
overlaps=abeNewLayer()
abeLayerAndNot(od nt_n overlaps)
; or could use abeLayerToHilightSet - see the manual
abeLayerToCellView(overlaps MARKER_LPP)

Note, this code has not been tested - it was just to point you in the (possibly) right direction.

Regards,

Andrew.