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Flatten layout and preserve instance name

Kaggarwa

Hello All,

I have generated a hierarchical layout in VXL and  have to Flatten it at the top level, but I want to preserve the hierarchical names of all the instances in the Design. I tried using dbFlattenInst() command, but it gives random names to instances after Flattening the Design.

Is there an existing SKILL command that does this or If someone can guide me how to proceed, I would be grateful.

In case of a SKILL code , I thought about a code where I can get the absolute coordinate of all the instances in my design, store that hierarchy tranversed in a map table and after flattening, rename all the instances based on the mapping table. I was wondering if there is an easier way to do this ?

Regards,

Kamala

Parents

  • Hello Derek,

    Thanks a lot for your reply. This is indeed much simpler. I wrote the code and it works well and as you suggested, just putting one more for loop gets it to work for any number of hierarchies. Further, I added options of Stop library and Skip library (synonymous to netlister) and thus I can flatten hierarchaically from top cell without worrying about different hierarchy levels for different cells.

    Regards,

    Kamala

Reply

  • Hello Derek,

    Thanks a lot for your reply. This is indeed much simpler. I wrote the code and it works well and as you suggested, just putting one more for loop gets it to work for any number of hierarchies. Further, I added options of Stop library and Skip library (synonymous to netlister) and thus I can flatten hierarchaically from top cell without worrying about different hierarchy levels for different cells.

    Regards,

    Kamala

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