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use sigmap

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This commit is contained in:
Alain Dargelas 2025-02-20 15:25:54 -08:00
parent 1abb8192df
commit adcbc7f8a6
1 changed files with 75 additions and 34 deletions
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109
passes/silimate/obs_clean.cc
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@ -39,38 +39,56 @@ void lhs2rhs_rhs2lhs(RTLIL::Module *module, SigMap &sigmap, dict<RTLIL::SigSpec,
for (auto it = module->connections().begin(); it != module->connections().end(); ++it) {
RTLIL::SigSpec lhs = it->first;
RTLIL::SigSpec rhs = it->second;
std::vector<SigSpec> lhsBits;
for (int i = 0; i < lhs.size(); i++) {
SigSpec bit_sig = lhs.extract(i, 1);
lhsBits.push_back(bit_sig);
if (lhs.is_chunk()) {
std::cout << "lhs ischunck: " << lhs.size() << std::endl;
} else {
std::cout << "lhs isnotchunck: " << lhs.size() << std::endl;
}
std::vector<SigSpec> rhsBits;
for (int i = 0; i < rhs.size(); i++) {
SigSpec bit_sig = rhs.extract(i, 1);
rhsBits.push_back(bit_sig);
if (rhs.is_chunk()) {
std::cout << "rhs ischunck: " << rhs.size() << std::endl;
} else {
std::cout << "rhs isnotchunck" << std::endl;
}
for (uint32_t i = 0; i < lhsBits.size(); i++) {
if (i < rhsBits.size()) {
rhsSig2LhsSig[sigmap(rhsBits[i])].insert(sigmap(lhsBits[i]));
lhsSig2rhsSig[sigmap(lhsBits[i])] = sigmap(rhsBits[i]);
if (!lhs.is_chunk()) {
std::vector<SigSpec> lhsBits;
for (int i = 0; i < lhs.size(); i++) {
SigSpec bit_sig = lhs.extract(i, 1);
lhsBits.push_back(bit_sig);
std::cout << "li:" << i << std::endl;
}
std::vector<SigSpec> rhsBits;
for (int i = 0; i < rhs.size(); i++) {
SigSpec bit_sig = rhs.extract(i, 1);
rhsBits.push_back(bit_sig);
std::cout << "ri:" << i << std::endl;
}
for (uint32_t i = 0; i < lhsBits.size(); i++) {
if (i < rhsBits.size()) {
std::cout << "lri:" << i << std::endl;
rhsSig2LhsSig[sigmap(rhsBits[i])].insert(sigmap(lhsBits[i]));
lhsSig2rhsSig[sigmap(lhsBits[i])] = sigmap(rhsBits[i]);
}
}
} else {
rhsSig2LhsSig[sigmap(rhs)].insert(sigmap(lhs));
lhsSig2rhsSig[sigmap(lhs)] = sigmap(rhs);
}
}
}
// Collect transitive fanin of a sig
void collectTransitiveFanin(RTLIL::SigSpec &sig, dict<RTLIL::SigSpec, std::set<Cell *>> &sig2CellsInFanin,
void collectTransitiveFanin(RTLIL::SigSpec &sig, SigMap& sigmap, dict<RTLIL::SigSpec, std::set<Cell *>> &sig2CellsInFanin,
dict<RTLIL::SigSpec, RTLIL::SigSpec> &lhsSig2RhsSig, std::set<Cell *> &visitedCells,
std::set<RTLIL::SigSpec> &visitedSigSpec)
{
if (visitedSigSpec.count(sig)) {
if (visitedSigSpec.count(sigmap(sig))) {
return;
}
visitedSigSpec.insert(sig);
visitedSigSpec.insert(sigmap(sig));
if (sig2CellsInFanin.count(sig)) {
for (Cell *cell : sig2CellsInFanin[sig]) {
if (sig2CellsInFanin.count(sigmap(sig))) {
for (Cell *cell : sig2CellsInFanin[sigmap(sig)]) {
if (visitedCells.count(cell)) {
continue;
}
@ -79,27 +97,30 @@ void collectTransitiveFanin(RTLIL::SigSpec &sig, dict<RTLIL::SigSpec, std::set<C
IdString portName = conn.first;
RTLIL::SigSpec actual = conn.second;
if (cell->input(portName)) {
collectTransitiveFanin(actual, sig2CellsInFanin, lhsSig2RhsSig, visitedCells, visitedSigSpec);
collectTransitiveFanin(actual, sigmap, sig2CellsInFanin, lhsSig2RhsSig, visitedCells, visitedSigSpec);
for (int i = 0; i < actual.size(); i++) {
SigSpec bit_sig = actual.extract(i, 1);
collectTransitiveFanin(bit_sig, sig2CellsInFanin, lhsSig2RhsSig, visitedCells, visitedSigSpec);
collectTransitiveFanin(bit_sig, sigmap, sig2CellsInFanin, lhsSig2RhsSig, visitedCells, visitedSigSpec);
}
}
}
}
}
if (lhsSig2RhsSig.count(sig)) {
RTLIL::SigSpec rhs = lhsSig2RhsSig[sig];
collectTransitiveFanin(rhs, sig2CellsInFanin, lhsSig2RhsSig, visitedCells, visitedSigSpec);
std::cout << "HERE\n";
if (lhsSig2RhsSig.count(sigmap(sig))) {
std::cout << "THERE\n";
RTLIL::SigSpec rhs = lhsSig2RhsSig[sigmap(sig)];
collectTransitiveFanin(rhs, sigmap, sig2CellsInFanin, lhsSig2RhsSig, visitedCells, visitedSigSpec);
for (int i = 0; i < rhs.size(); i++) {
std::cout << "THERE: " << i << "\n";
SigSpec bit_sig = rhs.extract(i, 1);
collectTransitiveFanin(bit_sig, sig2CellsInFanin, lhsSig2RhsSig, visitedCells, visitedSigSpec);
collectTransitiveFanin(bit_sig, sigmap, sig2CellsInFanin, lhsSig2RhsSig, visitedCells, visitedSigSpec);
}
}
}
// Only keep the cells and wires that are visited using the transitive fanin reached from output ports
void observabilityClean(RTLIL::Module *module, dict<RTLIL::SigSpec, std::set<Cell *>> &sig2CellsInFanin,
// Only keep the cells and wires that are visited using the transitive fanin reached from output ports or keep signals
void observabilityClean(RTLIL::Module *module, SigMap& sigmap, dict<RTLIL::SigSpec, std::set<Cell *>> &sig2CellsInFanin,
dict<RTLIL::SigSpec, RTLIL::SigSpec> &lhsSig2RhsSig)
{
if (module->get_bool_attribute(ID::keep))
@ -110,39 +131,59 @@ void observabilityClean(RTLIL::Module *module, dict<RTLIL::SigSpec, std::set<Cel
for (auto elt : sig2CellsInFanin) {
RTLIL::SigSpec po = elt.first;
RTLIL::Wire *w = po[0].wire;
if (w && !w->port_output) {
if (w && (!w->port_output) && (!w->get_bool_attribute(ID::keep))) {
continue;
}
collectTransitiveFanin(po, sig2CellsInFanin, lhsSig2RhsSig, visitedCells, visitedSigSpec);
collectTransitiveFanin(po, sigmap, sig2CellsInFanin, lhsSig2RhsSig, visitedCells, visitedSigSpec);
for (int i = 0; i < po.size(); i++) {
SigSpec bit_sig = po.extract(i, 1);
collectTransitiveFanin(bit_sig, sig2CellsInFanin, lhsSig2RhsSig, visitedCells, visitedSigSpec);
collectTransitiveFanin(bit_sig, sigmap, sig2CellsInFanin, lhsSig2RhsSig, visitedCells, visitedSigSpec);
}
}
for (auto elt : lhsSig2RhsSig) {
RTLIL::SigSpec po = elt.first;
RTLIL::Wire *w = po[0].wire;
if (w && !w->port_output) {
if (w && (!w->port_output) && (!w->get_bool_attribute(ID::keep))) {
continue;
}
collectTransitiveFanin(po, sig2CellsInFanin, lhsSig2RhsSig, visitedCells, visitedSigSpec);
if (po.is_chunk()) {
std::cout << "po ischunck" << std::endl;
} else {
std::cout << "po isnotchunck" << std::endl;
}
if (w)
std::cout << "Name: " << w->name.c_str() << std::endl;
else
std::cout << "No Name: " << std::endl;
std::cout << "PO size: " << po.size() << std::endl;
collectTransitiveFanin(po, sigmap, sig2CellsInFanin, lhsSig2RhsSig, visitedCells, visitedSigSpec);
for (int i = 0; i < po.size(); i++) {
SigSpec bit_sig = po.extract(i, 1);
collectTransitiveFanin(bit_sig, sig2CellsInFanin, lhsSig2RhsSig, visitedCells, visitedSigSpec);
collectTransitiveFanin(bit_sig, sigmap, sig2CellsInFanin, lhsSig2RhsSig, visitedCells, visitedSigSpec);
}
}
pool<RTLIL::SigSig> newConnections;
for (auto it = module->connections().begin(); it != module->connections().end(); ++it) {
RTLIL::SigSpec lhs = it->first;
RTLIL::SigSpec sigmaplhs = sigmap(lhs);
if (!sigmaplhs.is_fully_const()) {
lhs = sigmaplhs;
}
if (visitedSigSpec.count(lhs)) {
newConnections.insert(*it);
std::cout << "New connection\n";
} else {
for (int i = 0; i < lhs.size(); i++) {
SigSpec bit_sig = lhs.extract(i, 1);
RTLIL::SigSpec sigmapbit_sig = sigmap(bit_sig);
//if (!sigmapbit_sig.is_fully_const()) {
bit_sig = sigmapbit_sig;
//}
if (visitedSigSpec.count(bit_sig)) {
newConnections.insert(*it);
std::cout << "New connection\n";
break;
}
}
@ -157,7 +198,7 @@ void observabilityClean(RTLIL::Module *module, dict<RTLIL::SigSpec, std::set<Cel
pool<RTLIL::Wire *> wiresToRemove;
for (auto wire : module->wires()) {
RTLIL::SigSpec sig = wire;
if (visitedSigSpec.count(sig)) {
if (visitedSigSpec.count(sigmap(sig))) {
continue;
}
bool bitVisited = false;
@ -222,7 +263,7 @@ struct ObsClean : public ScriptPass {
dict<RTLIL::SigSpec, std::set<RTLIL::SigSpec>> rhsSig2LhsSig;
lhs2rhs_rhs2lhs(module, sigmap, rhsSig2LhsSig, lhsSig2RhsSig);
// Actual cleanup
observabilityClean(module, sig2CellsInFanin, lhsSig2RhsSig);
observabilityClean(module, sigmap, sig2CellsInFanin, lhsSig2RhsSig);
}
log("End obs_clean pass\n");
log_flush();