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opt_lut: add -dlogic, to avoid disturbing logic such as carry chains.

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whitequark 2018-12-05 15:26:40 +00:00
parent e603484070
commit 45cb6200af
3 changed files with 166 additions and 20 deletions
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2
tests/opt/opt_lut.ys
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@ -3,7 +3,7 @@ synth_ice40
ice40_unlut
design -save preopt
opt_lut
opt_lut -dlogic SB_CARRY:I0=1:I1=2:CI=3
design -stash postopt
design -copy-from preopt -as preopt top