How to replace all SVT cells with HVT cells in Encounter

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azurewind

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Hello.

I now have a synthesized netlist with all SVT cells. Then in Cadence Encounter, how to replace all SVT cells with HVT cells. I do not want to achieve this by modifying the synthesized netlist.

What I have tried so far is I provide both SVT and HVT libraries to Encounter. Then I use set_dont_use all SVT cells. However, what I got in the netlist after routing is a mixed VT netlist. set_dont_use seems not to work.
 

you are doing it wrong. encounter is not the place for doing this, synthesis is. still, if somehow there is a reason for doing this at this point (there isn't, by the way), you can open the netlist in a text editor and search and replace the name of each cell.

alternatively you can code a 'search and replace' in TCL and run it from encounter. again, this is pointless.

set_dont_use works, your understanding of it is incorrect. encounter will optimize your netlist as it goes on about it. each time a cell has to be replaced to optimize something, he picks one cell from HVT. it doesn't mean he will replace all SVTs like you expect.
 

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