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Subject: Technology translation in RC
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myazdani
Posts: 0
Online: User is Offline
12/12/2006 12:14 PM  
Hello,

Anybody know how to do technology translation in RC like DC allows? That is, given a netlist mapped in one technology library, can I map it to a different technology witout resynthesizing?

I think DC had a translate command, does RC have anything similar?

Thanks,
sporadic crash
Posts: 43
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12/12/2006 2:03 PM  
I don't think that any tool is *that* intelligent to do it. Because one technology has not the exact list of cells the other has. Some cells in one technology might not have the corresponding cells in the other. Without resynthesis it is almost impossible.

On the other hand, even if you would have to change the technologies, your design might not meet the timing you need. One cell in one technology can be fast, the corresponding cell in the other technology can be pretty slow.

It is a bit difficult and dangerous design practice. It will cost you probably a lot of time because you might need to edit the netlist manually in some cases. The time you will lose for this procedure can be used for resynthesis.
evenditti
Moderator
Posts: 23
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12/12/2006 3:06 PM  

DC does have a translate command and as higliighted by sporadic _crash it doesn't give you an optimized netlist (but you can run the optimization once the translation is done)

The way it works is that you don't have to have cell to cell mapping for the combinatorial but if you have some exotic cells it's a good idea to have it otherwise after tyranslation you have to do a lot of cleanup.

For RC I will suggest to do the following.

setup library 1
read your netlist
unmap it (back to GTECH)
remove library 1 setup and setup library 2
map your design to library 2

The sequence above should "translate" your design from library 1 to library 2.

I will have to look into the documetation if you need more specific command but this is the generic idea.

Thanks,
Eric.
Eric Venditti
myazdani
Posts: 0
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12/13/2006 9:54 AM  
Thanks for your suggestions. I do realize that it probably won't match results produced by resynthesis, but it can give an initial estimate of the speed achievable. That is exactly what I am looking for.

Manzur.
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Forums > Digital IC > Synthesis and test > Technology translation in RC


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