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added support for latched output reset

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This commit is contained in:
Miodrag Milanovic 2022-12-19 11:40:50 +01:00
parent 131b557727
commit 713b7d3e26
1 changed files with 42 additions and 5 deletions
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47
passes/sat/synthprop.cc
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@ -43,6 +43,10 @@ struct SynthPropWorker
IdString port_name;
IdString reset_name;
bool reset_pol;
// basic contrcutor
SynthPropWorker(RTLIL::Design *design) : design(design), or_outputs(false), port_name(RTLIL::escape_id("assertions")) {}
@ -94,9 +98,14 @@ void SynthPropWorker::run()
data.first->fixup_ports();
}
RTLIL::Wire *output = nullptr;
for (auto &data : tracing_data) {
int num = 0;
RTLIL::Wire *port_wire = data.first->wire(port_name);
if (!reset_name.empty() && data.first == module) {
port_wire = data.first->addWire(NEW_ID, data.second.names.size());
output = port_wire;
}
pool<Wire*> connected;
for (auto cell : data.second.assertion_cells) {
if (cell->type == ID($assert)) {
@ -142,6 +151,17 @@ void SynthPropWorker::run()
}
}
// If no assertions found
if (tracing_data[module].names.size() == 0) return;
if (!reset_name.empty()) {
int width = tracing_data[module].names.size();
SigSpec reset = module->wire(reset_name);
reset.extend_u0(width, true);
module->addDlatchsr(NEW_ID, State::S1, Const(State::S0,width), reset, output, module->wire(port_name), true, true, reset_pol);
}
if (!map_file.empty()) {
std::ofstream fout;
fout.open(map_file, std::ios::out | std::ios::trunc);
@ -166,7 +186,7 @@ struct SyntProperties : public Pass {
log("This creates synthesizable properties for selected module.\n");
log("\n");
log("\n");
log(" -name <port_name>\n");
log(" -name <portname>\n");
log("\n");
log("Name output port for assertions (default: assertions).\n");
log("\n");
@ -182,10 +202,16 @@ struct SyntProperties : public Pass {
log("property is violated, instead of generating individual output bits.\n");
log("\n");
log("\n");
log(" -latch <reset_signal_name> <polarity>\n");
log(" -reset <portname>\n");
log("\n");
log("Latch a high state on the generated outputs until an asynchronous top-level\n");
log("reset input is activated.\n");
log("Name of top-level reset input. Latch a high state on the generated outputs\n");
log("until an asynchronous top-level reset input is activated.\n");
log("\n");
log("\n");
log(" -resetn <portname>\n");
log("\n");
log("Name of top-level reset input (inverse polarity). Latch a high state on the\n");
log("generated outputs until an asynchronous top-level reset input is activated.\n");
log("\n");
log("\n");
}
@ -205,7 +231,14 @@ struct SyntProperties : public Pass {
worker.map_file = args[++argidx];
continue;
}
if (args[argidx] == "-latch" && argidx+2 < args.size()) {
if (args[argidx] == "-reset" && argidx+1 < args.size()) {
worker.reset_name = RTLIL::escape_id(args[++argidx]);
worker.reset_pol = true;
continue;
}
if (args[argidx] == "-resetn" && argidx+1 < args.size()) {
worker.reset_name = RTLIL::escape_id(args[++argidx]);
worker.reset_pol = false;
continue;
}
if (args[argidx] == "-or_outputs") {
@ -222,6 +255,10 @@ struct SyntProperties : public Pass {
if (top == nullptr)
log_cmd_error("Can't find top module in current design!\n");
auto *reset = top->wire(worker.reset_name);
if (!worker.reset_name.empty() && reset == nullptr)
log_cmd_error("Can't find reset line in current design!\n");
worker.module = top;
worker.run();
}