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-rw-r--r--passes/sat/sat.cc6
1 files changed, 3 insertions, 3 deletions
diff --git a/passes/sat/sat.cc b/passes/sat/sat.cc
index e4654d835..dd56d8c71 100644
--- a/passes/sat/sat.cc
+++ b/passes/sat/sat.cc
@@ -519,7 +519,7 @@ struct SatHelper
for (auto &p : d->connections()) {
if (d->type == "$dff" && p.first == "\\CLK")
continue;
- if (d->type.substr(0, 6) == "$_DFF_" && p.first == "\\C")
+ if (d->type.begins_with("$_DFF_") && p.first == "\\C")
continue;
queued_signals.add(handled_signals.remove(sigmap(p.second)));
}
@@ -797,7 +797,7 @@ struct SatHelper
vector<string> data;
string name = wd.first.c_str();
- while (name.substr(0, 1) == "\\")
+ while (name.compare(0, 1, "\\") == 0)
name = name.substr(1);
fprintf(f, " { \"name\": \"%s\", \"wave\": \"", name.c_str());
@@ -1353,7 +1353,7 @@ struct SatPass : public Pass {
if (show_regs) {
pool<Wire*> reg_wires;
for (auto cell : module->cells()) {
- if (cell->type == "$dff" || cell->type.substr(0, 6) == "$_DFF_")
+ if (cell->type == "$dff" || cell->type.begins_with("$_DFF_"))
for (auto bit : cell->getPort("\\Q"))
if (bit.wire)
reg_wires.insert(bit.wire);