@oe1cxw I'm trying to add full support for GP4's FFs to yosys. basically one can get either Q or QN, but not both at same time
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I have a roadmap for supporting things like that well. The most important thing missing so far is the $_FNOT_ gate.
$_FNOT_ = free not. This will help using the inverted output in more cases.
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oh I see, so you basically want to prepopulate the output with $_FNOT_s, then rely on opt to move driven networks there
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yes. With some hacks in the ABC pass to preserve the $_FNOT_ during logic optimization.
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