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add -fst-noinit flag to sim for not initializing the state from the fst file

This commit is contained in:
Emily Schmidt 2024-07-24 17:33:32 +01:00
parent 12a31a4418
commit bdb59ffc8e
1 changed files with 10 additions and 1 deletions
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11
passes/sat/sim.cc
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@ -123,6 +123,7 @@ struct SimShared
std::vector<TriggeredAssertion> triggered_assertions; std::vector<TriggeredAssertion> triggered_assertions;
std::vector<DisplayOutput> display_output; std::vector<DisplayOutput> display_output;
bool serious_asserts = false; bool serious_asserts = false;
bool fst_noinit = false;
bool initstate = true; bool initstate = true;
}; };
@ -1553,7 +1554,7 @@ struct SimWorker : SimShared
bool did_something = top->setInputs(); bool did_something = top->setInputs();
if (initial) { if (initial) {
did_something |= top->setInitState(); if (!fst_noinit) did_something |= top->setInitState();
initialize_stable_past(); initialize_stable_past();
initial = false; initial = false;
} }
@ -2688,6 +2689,10 @@ struct SimPass : public Pass {
log(" fail the simulation command if, in the course of simulating,\n"); log(" fail the simulation command if, in the course of simulating,\n");
log(" any of the asserts in the design fail\n"); log(" any of the asserts in the design fail\n");
log("\n"); log("\n");
log(" -fst-noinit\n");
log(" do not initialize latches and memories from an input FST or VCD file\n");
log(" (use the initial defined by the design instead)\n");
log("\n");
log(" -q\n"); log(" -q\n");
log(" disable per-cycle/sample log message\n"); log(" disable per-cycle/sample log message\n");
log("\n"); log("\n");
@ -2850,6 +2855,10 @@ struct SimPass : public Pass {
worker.serious_asserts = true; worker.serious_asserts = true;
continue; continue;
} }
if (args[argidx] == "-fst-noinit") {
worker.fst_noinit = true;
continue;
}
if (args[argidx] == "-x") { if (args[argidx] == "-x") {
worker.ignore_x = true; worker.ignore_x = true;
continue; continue;