When designing in P&R environments, standard cells and IP blocks are represented as LEF cells with abstract data in them. To run Calibre DRC or LVS on a GDS file, the DEF design must be translated to GDS and all of the LEF cells must be replaced with their GDS equivalent that contains the mask level data to be verified. I can think of a few ways to do this.
Specify multiple files in the LAYOUT PATH statement of the SVRF rules file
Use Calibre DESIGNrev *layout merge *API command
Use the new Calibre DESIGNrev layout filemerge disk-based merge
Merge within the P&R tool or *other *method.
I think each of these may have some advantages and disadvantages. How do you do this and why?