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

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This commit is contained in:
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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4
techlibs/ice40/synth_ice40.cc
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@ -268,8 +268,8 @@ struct SynthIce40Pass : public ScriptPass
run("abc -lut 4");
run("clean");
if (relut || help_mode) {
run("ice40_unlut", "(only if -relut)");
run("opt_lut", " (only if -relut)");
run("ice40_unlut", " (only if -relut)");
run("opt_lut -dlogic SB_CARRY:I0=1:I1=2:CI=3", "(only if -relut)");
}
}