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add $priority cell

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This commit is contained in:
Emil J. Tywoniak 2026-01-09 18:43:15 +01:00
parent 967b47d984
commit e166dd4475
9 changed files with 136 additions and 2 deletions
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19
kernel/calc.cc
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@ -658,6 +658,25 @@ RTLIL::Const RTLIL::const_bmux(const RTLIL::Const &arg1, const RTLIL::Const &arg
return t;
}
RTLIL::Const RTLIL::const_priority(const RTLIL::Const &arg)
{
std::vector<State> t;
std::optional<State> first_non_zero = std::nullopt;
for (int i = 0; i < GetSize(arg); i++)
{
RTLIL::State s = arg.at(i);
if (first_non_zero && s != State::Sx) {
t.push_back(*first_non_zero == State::S1 ? State::S0 : *first_non_zero);
} else {
t.push_back(s);
}
if ((!first_non_zero && s != State::S0) || s == State::Sx) {
first_non_zero = s;
}
}
return t;
}
RTLIL::Const RTLIL::const_demux(const RTLIL::Const &arg1, const RTLIL::Const &arg2)
{
int width = GetSize(arg1);