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Bugfix in fsm_extract

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This commit is contained in:
Clifford Wolf 2015-07-03 18:42:36 +02:00
parent f0c9a099d2
commit 766dd51447
1 changed files with 16 additions and 3 deletions
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19
passes/fsm/fsm_extract.cc
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@ -56,6 +56,17 @@ static bool find_states(RTLIL::SigSpec sig, const RTLIL::SigSpec &dff_out, RTLIL
std::set<sig2driver_entry_t> cellport_list;
sig2driver.find(sig, cellport_list);
if (GetSize(cellport_list) > 1) {
log(" found %d combined drivers for state signal %s.\n", GetSize(cellport_list), log_signal(sig));
return false;
}
if (GetSize(cellport_list) < 1) {
log(" found no driver for state signal %s.\n", log_signal(sig));
return false;
}
for (auto &cellport : cellport_list)
{
RTLIL::Cell *cell = module->cells_.at(cellport.first);
@ -90,9 +101,11 @@ static bool find_states(RTLIL::SigSpec sig, const RTLIL::SigSpec &dff_out, RTLIL
log(" found reset state: %s (guessed from mux tree)\n", log_signal(*reset_state));
} while (0);
if (ctrl.extract(sig_s).size() == 0) {
log(" found ctrl input: %s\n", log_signal(sig_s));
ctrl.append(sig_s);
for (auto sig_s_bit : sig_s) {
if (ctrl.extract(sig_s_bit).empty()) {
log(" found ctrl input: %s\n", log_signal(sig_s_bit));
ctrl.append(sig_s_bit);
}
}
if (!find_states(sig_aa, dff_out, ctrl, states))