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Undo fanout_split

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This commit is contained in:
Akash Levy 2024-08-21 22:20:25 -07:00
parent d0529c7eea
commit 8989f2f98c
1 changed files with 6 additions and 14 deletions
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20
passes/opt/muxpack.cc
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@ -132,7 +132,7 @@ struct MuxpackWorker
ExclusiveDatabase excl_db;
void make_sig_chain_next_prev(bool fanout_split)
void make_sig_chain_next_prev()
{
for (auto wire : module->wires())
{
@ -152,7 +152,7 @@ struct MuxpackWorker
b_sig = sigmap(cell->getPort(ID::B));
SigSpec y_sig = sigmap(cell->getPort(ID::Y));
if (sig_chain_next.count(a_sig) && !fanout_split)
if (sig_chain_next.count(a_sig))
for (auto a_bit : a_sig.bits())
sigbit_with_non_chain_users.insert(a_bit);
else {
@ -161,7 +161,7 @@ struct MuxpackWorker
}
if (!b_sig.empty()) {
if (sig_chain_next.count(b_sig) && !fanout_split)
if (sig_chain_next.count(b_sig))
for (auto b_bit : b_sig.bits())
sigbit_with_non_chain_users.insert(b_bit);
else {
@ -311,10 +311,10 @@ struct MuxpackWorker
candidate_cells.clear();
}
MuxpackWorker(Module *module, bool ignore_excl, bool fanout_split) :
MuxpackWorker(Module *module, bool ignore_excl) :
module(module), sigmap(module), mux_count(0), pmux_count(0), excl_db(module, sigmap, ignore_excl)
{
make_sig_chain_next_prev(fanout_split);
make_sig_chain_next_prev();
find_chain_start_cells(ignore_excl);
for (auto c : chain_start_cells) {
@ -345,14 +345,10 @@ struct MuxpackPass : public Pass {
log(" -ignore_excl\n");
log(" ignore mutually exclusive constraint when packing (less conservative)\n");
log("\n");
log(" -fanout_split\n");
log(" fanout is already split (via splitfanout), skip non-chain user check\n");
log("\n");
}
void execute(std::vector<std::string> args, RTLIL::Design *design) override
{
bool ignore_excl = false;
bool fanout_split = false;
log_header(design, "Executing MUXPACK pass ($mux cell cascades to $pmux).\n");
@ -363,10 +359,6 @@ struct MuxpackPass : public Pass {
ignore_excl = true;
continue;
}
if (args[argidx] == "-fanout_split") {
fanout_split = true;
continue;
}
break;
}
extra_args(args, argidx, design);
@ -375,7 +367,7 @@ struct MuxpackPass : public Pass {
int pmux_count = 0;
for (auto module : design->selected_modules()) {
MuxpackWorker worker(module, ignore_excl, fanout_split);
MuxpackWorker worker(module, ignore_excl);
mux_count += worker.mux_count;
pmux_count += worker.pmux_count;
}