diff options
Diffstat (limited to 'passes/sat/eval.cc')
| -rw-r--r-- | passes/sat/eval.cc | 39 |
1 files changed, 30 insertions, 9 deletions
diff --git a/passes/sat/eval.cc b/passes/sat/eval.cc index 473cb41c5..315e5d7c2 100644 --- a/passes/sat/eval.cc +++ b/passes/sat/eval.cc @@ -142,13 +142,14 @@ struct VlogHammerReporter return list; } - void sat_check(RTLIL::Module *module, RTLIL::SigSpec recorded_set_vars, RTLIL::Const recorded_set_vals, RTLIL::SigSpec expected_y) + void sat_check(RTLIL::Module *module, RTLIL::SigSpec recorded_set_vars, RTLIL::Const recorded_set_vals, RTLIL::SigSpec expected_y, bool model_undef) { - log("Verifying SAT model..\n"); + log("Verifying SAT model (%s)..\n", model_undef ? "with undef" : "without undef"); ezDefaultSAT ez; SigMap sigmap(module); SatGen satgen(&ez, design, &sigmap); + satgen.model_undef = model_undef; for (auto &c : module->cells) if (!satgen.importCell(c.second)) @@ -158,9 +159,21 @@ struct VlogHammerReporter std::vector<int> rec_val_vec = satgen.importSigSpec(recorded_set_vals); ez.assume(ez.vec_eq(rec_var_vec, rec_val_vec)); + std::vector<int> rec_undef_var_vec, rec_undef_val_vec; + if (model_undef) { + rec_undef_var_vec = satgen.importUndefSigSpec(recorded_set_vars); + rec_undef_val_vec = satgen.importUndefSigSpec(recorded_set_vals); + ez.assume(ez.vec_eq(rec_undef_var_vec, rec_undef_val_vec)); + } + std::vector<int> y_vec = satgen.importSigSpec(module->wires.at("\\y")); std::vector<bool> y_values; + if (model_undef) { + std::vector<int> y_undef_vec = satgen.importUndefSigSpec(module->wires.at("\\y")); + y_vec.insert(y_vec.end(), y_undef_vec.begin(), y_undef_vec.end()); + } + log(" Created SAT problem with %d variables and %d clauses.\n", ez.numCnfVariables(), ez.numCnfClauses()); @@ -168,12 +181,19 @@ struct VlogHammerReporter log_error("Failed to find solution to SAT problem.\n"); expected_y.expand(); - assert(expected_y.chunks.size() == y_vec.size()); - for (size_t i = 0; i < y_vec.size(); i++) { - RTLIL::State bit = expected_y.chunks.at(i).data.bits.at(0); - if ((bit == RTLIL::State::S0 || bit == RTLIL::State::S1) && ((bit == RTLIL::State::S1) != y_values.at(i))) - log_error("Found error in SAT model: y[%d] = %d, should be %d.\n", - int(i), int(y_values.at(i)), int(bit == RTLIL::State::S1)); + for (int i = 0; i < expected_y.width; i++) { + RTLIL::State solution_bit = y_values.at(i) ? RTLIL::State::S1 : RTLIL::State::S0; + RTLIL::State expected_bit = expected_y.chunks.at(i).data.bits.at(0); + if (model_undef) { + if (y_values.at(expected_y.width+i)) + solution_bit = RTLIL::State::Sx; + } else { + if (expected_bit == RTLIL::State::Sx) + continue; + } + if (solution_bit != expected_bit) + log_error("Found error in SAT model: y[%d] = %s, should be %s.\n", + int(i), log_signal(solution_bit), log_signal(expected_bit)); } log(" SAT model verified.\n"); @@ -230,7 +250,8 @@ struct VlogHammerReporter if (module_name == "rtl") { rtl_sig = sig; rtl_sig.expand(); - sat_check(module, recorded_set_vars, recorded_set_vals, sig); + sat_check(module, recorded_set_vars, recorded_set_vals, sig, false); + // sat_check(module, recorded_set_vars, recorded_set_vals, sig, true); } else if (rtl_sig.width > 0) { sig.expand(); if (rtl_sig.width != sig.width) |