( ESNUG 241 Item 9 ) ---------------------------------------------- [6/26/96]
From: [ Prisoner of Zenda ]
Subject: Will Trade My Secret Switches For Yours!
John, I don't want to get hassled for this by Synopsys. No names, OK?
I'd like to see more secret switches "exposed" in ESNUG. In trade, here's
mine: I was having headaches with Synopsys putting in unnecessary buffers.
(I figured out that there was no capacitance, fannout, or timing problem, but
I was still getting two inverters on each output.) Here's the fix:
/* clean up unnecessary inverters */
compile_clean_inverters = true
(Sure enough. My extra inverters went away. I am wondering why Synopsys
hasn't published this switch. Could there be some sort of side effect?
So far, I have had no problems with it.) Has anyone else found any helpful
undocumented features that they would like to share?
- [ Prisoner of Zenda ]
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