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coolrunner2: Separate and improve buffer cell insertion pass

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The new pass will contain all of the logic for inserting "passthrough"
product term and XOR cells as appropriate for the architecture. For
example, this commit fixes connecting an input pin directly to another
output pin with no logic in between.
This commit is contained in:
R. Ou 2020-02-16 20:25:46 -08:00
parent cd60f079d6
commit 6a0682f5a0
4 changed files with 163 additions and 54 deletions
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1
techlibs/coolrunner2/synth_coolrunner2.cc
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@ -178,6 +178,7 @@ struct SynthCoolrunner2Pass : public ScriptPass
run("iopadmap -bits -inpad IBUF O:I -outpad IOBUFE I:IO -inoutpad IOBUFE O:IO -toutpad IOBUFE E:I:IO -tinoutpad IOBUFE E:O:I:IO");
run("attrmvcp -attr src -attr LOC t:IOBUFE n:*");
run("attrmvcp -attr src -attr LOC -driven t:IBUF n:*");
run("coolrunner2_fixup");
run("splitnets");
run("clean");
}