diff options
| -rw-r--r-- | frontends/verific/verific.cc | 11 | ||||
| -rw-r--r-- | frontends/verific/verific.h | 2 | ||||
| -rw-r--r-- | frontends/verific/verificsva.cc | 5 |
3 files changed, 16 insertions, 2 deletions
diff --git a/frontends/verific/verific.cc b/frontends/verific/verific.cc index 1dd6d7e24..c5fa58313 100644 --- a/frontends/verific/verific.cc +++ b/frontends/verific/verific.cc @@ -64,6 +64,7 @@ YOSYS_NAMESPACE_BEGIN int verific_verbose; bool verific_import_pending; string verific_error_msg; +int verific_sva_fsm_limit; vector<string> verific_incdirs, verific_libdirs; @@ -1618,6 +1619,8 @@ struct VerificExtNets void verific_import(Design *design, std::string top) { + verific_sva_fsm_limit = 16; + std::set<Netlist*> nl_todo, nl_done; { @@ -1789,6 +1792,9 @@ struct VerificPass : public Pass { log(" -nosva\n"); log(" Ignore SVA properties, do not infer checker logic.\n"); log("\n"); + log(" -L <int>\n"); + log(" Maximum number of ctrl bits for SVA checker FSMs (default=16).\n"); + log("\n"); log(" -n\n"); log(" Keep all Verific names on instances and nets. By default only\n"); log(" user-declared names are preserved.\n"); @@ -1830,6 +1836,7 @@ struct VerificPass : public Pass { } verific_verbose = 0; + verific_sva_fsm_limit = 16; const char *release_str = Message::ReleaseString(); time_t release_time = Message::ReleaseDate(); @@ -2036,6 +2043,10 @@ struct VerificPass : public Pass { mode_nosva = true; continue; } + if (args[argidx] == "-L" && argidx+1 < GetSize(args)) { + verific_sva_fsm_limit = atoi(args[++argidx].c_str()); + continue; + } if (args[argidx] == "-n") { mode_names = true; continue; diff --git a/frontends/verific/verific.h b/frontends/verific/verific.h index cbd9314db..334a436af 100644 --- a/frontends/verific/verific.h +++ b/frontends/verific/verific.h @@ -101,6 +101,8 @@ void verific_import_sva_cover(VerificImporter *importer, Verific::Instance *inst void verific_import_sva_trigger(VerificImporter *importer, Verific::Instance *inst); bool verific_is_sva_net(VerificImporter *importer, Verific::Net *net); +extern int verific_sva_fsm_limit; + YOSYS_NAMESPACE_END #endif diff --git a/frontends/verific/verificsva.cc b/frontends/verific/verificsva.cc index 85b842186..cdc9ece8c 100644 --- a/frontends/verific/verificsva.cc +++ b/frontends/verific/verificsva.cc @@ -466,13 +466,14 @@ struct SvaFsm dnode.ctrl.sort_and_unify(); - if (GetSize(dnode.ctrl) > 16) { + if (GetSize(dnode.ctrl) > verific_sva_fsm_limit) { if (verific_verbose >= 2) { log(" detected state explosion in DFSM generation:\n"); dump(); log(" ctrl signal: %s\n", log_signal(dnode.ctrl)); } - log_error("SVA DFSM state ctrl signal has %d (>16) bits. Stopping to prevent exponential design size explosion.\n", GetSize(dnode.ctrl)); + log_error("SVA DFSM state ctrl signal has %d (>%d) bits. Stopping to prevent exponential design size explosion.\n", + GetSize(dnode.ctrl), verific_sva_fsm_limit); } for (int i = 0; i < (1 << GetSize(dnode.ctrl)); i++) |