mirror of https://github.com/YosysHQ/yosys.git
Re-organization in sat_solver pass for temporal induction
This commit is contained in:
parent
41932e8b64
commit
1349b845e3
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@ -37,7 +37,7 @@ static void split(std::vector<std::string> &tokens, const std::string &text, cha
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tokens.push_back(text.substr(start));
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}
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bool parse_sigstr(RTLIL::SigSpec &sig, RTLIL::Module *module, std::string str)
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static bool parse_sigstr(RTLIL::SigSpec &sig, RTLIL::Module *module, std::string str)
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{
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std::vector<std::string> tokens;
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split(tokens, str, ',');
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@ -105,6 +105,283 @@ bool parse_sigstr(RTLIL::SigSpec &sig, RTLIL::Module *module, std::string str)
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return true;
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}
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struct SatHelper
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{
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RTLIL::Design *design;
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RTLIL::Module *module;
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ezDefaultSAT ez;
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SigMap sigmap;
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CellTypes ct;
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SatGen satgen;
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// additional constraints
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std::vector<std::pair<std::string, std::string>> sets;
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std::map<int, std::vector<std::pair<std::string, std::string>>> sets_at;
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std::map<int, std::vector<std::string>> unsets_at;
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// model variables
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std::vector<std::string> shows;
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SigPool show_signal_pool;
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SigSet<RTLIL::Cell*> show_drivers;
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std::map<RTLIL::Cell*,RTLIL::SigSpec> show_driven;
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int max_timestep;
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SatHelper(RTLIL::Design *design, RTLIL::Module *module) :
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design(design), module(module), sigmap(module), ct(design), satgen(&ez, design, &sigmap)
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{
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max_timestep = -1;
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}
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void setup(int timestep = -1)
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{
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if (timestep > 0)
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log ("\nSetting up time step %d:\n", timestep);
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else
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log ("\nSetting up SAT problem:\n");
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if (timestep > max_timestep)
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max_timestep = timestep;
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RTLIL::SigSpec big_lhs, big_rhs;
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for (auto &s : sets)
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{
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RTLIL::SigSpec lhs, rhs;
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if (!parse_sigstr(lhs, module, s.first))
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log_cmd_error("Failed to parse lhs set expression `%s'.\n", s.first.c_str());
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if (!parse_sigstr(rhs, module, s.second))
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log_cmd_error("Failed to parse rhs set expression `%s'.\n", s.second.c_str());
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show_signal_pool.add(sigmap(lhs));
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show_signal_pool.add(sigmap(rhs));
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if (lhs.width != rhs.width)
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log_cmd_error("Set expression with different lhs and rhs sizes: %s (%s, %d bits) vs. %s (%s, %d bits)\n",
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s.first.c_str(), log_signal(lhs), lhs.width, s.second.c_str(), log_signal(rhs), rhs.width);
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log("Import set-constraint: %s = %s\n", log_signal(lhs), log_signal(rhs));
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big_lhs.remove2(lhs, &big_rhs);
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big_lhs.append(lhs);
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big_rhs.append(rhs);
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}
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for (auto &s : sets_at[timestep])
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{
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RTLIL::SigSpec lhs, rhs;
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if (!parse_sigstr(lhs, module, s.first))
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log_cmd_error("Failed to parse lhs set expression `%s'.\n", s.first.c_str());
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if (!parse_sigstr(rhs, module, s.second))
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log_cmd_error("Failed to parse rhs set expression `%s'.\n", s.second.c_str());
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show_signal_pool.add(sigmap(lhs));
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show_signal_pool.add(sigmap(rhs));
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if (lhs.width != rhs.width)
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log_cmd_error("Set expression with different lhs and rhs sizes: %s (%s, %d bits) vs. %s (%s, %d bits)\n",
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s.first.c_str(), log_signal(lhs), lhs.width, s.second.c_str(), log_signal(rhs), rhs.width);
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log("Import set-constraint for timestep: %s = %s\n", log_signal(lhs), log_signal(rhs));
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big_lhs.remove2(lhs, &big_rhs);
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big_lhs.append(lhs);
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big_rhs.append(rhs);
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}
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for (auto &s : unsets_at[timestep])
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{
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RTLIL::SigSpec lhs;
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if (!parse_sigstr(lhs, module, s))
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log_cmd_error("Failed to parse lhs set expression `%s'.\n", s.c_str());
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show_signal_pool.add(sigmap(lhs));
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log("Import unset-constraint for timestep: %s\n", log_signal(lhs));
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big_lhs.remove2(lhs, &big_rhs);
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}
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log("Final constraint equation: %s = %s\n", log_signal(big_lhs), log_signal(big_rhs));
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std::vector<int> lhs_vec = satgen.importSigSpec(big_lhs, timestep);
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std::vector<int> rhs_vec = satgen.importSigSpec(big_rhs, timestep);
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ez.assume(ez.vec_eq(lhs_vec, rhs_vec));
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int import_cell_counter = 0;
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for (auto &c : module->cells)
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if (design->selected(module, c.second) && ct.cell_known(c.second->type)) {
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// log("Import cell: %s\n", RTLIL::id2cstr(c.first));
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if (satgen.importCell(c.second, timestep)) {
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for (auto &p : c.second->connections)
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if (ct.cell_output(c.second->type, p.first))
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show_drivers.insert(sigmap(p.second), c.second);
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else
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show_driven[c.second].append(sigmap(p.second));
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import_cell_counter++;
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} else
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log("Warning: failed to import cell %s (type %s) to SAT database.\n", RTLIL::id2cstr(c.first), RTLIL::id2cstr(c.second->type));
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}
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log("Imported %d cells to SAT database.\n", import_cell_counter);
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}
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bool solve()
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{
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return ez.solve(modelExpressions, modelValues);
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}
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struct ModelBlockInfo {
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int timestep, offset, width;
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std::string description;
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bool operator < (const ModelBlockInfo &other) const {
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if (timestep != other.timestep)
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return timestep < other.timestep;
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if (description != other.description)
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return description < other.description;
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if (offset != other.offset)
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return offset < other.offset;
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if (width != other.width)
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return width < other.width;
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return false;
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}
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};
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std::vector<int> modelExpressions;
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std::vector<bool> modelValues;
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std::set<ModelBlockInfo> modelInfo;
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void generate_model()
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{
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RTLIL::SigSpec modelSig;
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// Add "normal" show signals for every timestep
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if (shows.size() == 0) {
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SigPool handled_signals, final_signals;
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for (auto &s : show_driven)
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s.second.sort_and_unify();
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while (show_signal_pool.size() > 0) {
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RTLIL::SigSpec sig = show_signal_pool.export_one();
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show_signal_pool.del(sig);
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handled_signals.add(sig);
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std::set<RTLIL::Cell*> drivers = show_drivers.find(sig);
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if (drivers.size() == 0) {
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final_signals.add(sig);
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} else {
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for (auto &d : drivers)
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for (auto &p : d->connections)
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show_signal_pool.add(handled_signals.remove(p.second));
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}
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}
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modelSig = final_signals.export_all();
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} else {
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for (auto &s : shows) {
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RTLIL::SigSpec sig;
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if (!parse_sigstr(sig, module, s))
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log_cmd_error("Failed to parse show expression `%s'.\n", s.c_str());
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log("Import show expression: %s\n", log_signal(sig));
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modelSig.append(sig);
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}
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}
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modelSig.sort_and_unify();
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// log("Model signals: %s\n", log_signal(modelSig));
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for (auto &c : modelSig.chunks)
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if (c.wire != NULL) {
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ModelBlockInfo info;
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RTLIL::SigSpec chunksig = c;
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info.width = chunksig.width;
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info.description = log_signal(chunksig);
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for (int timestep = -1; timestep <= max_timestep; timestep++) {
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if ((timestep == -1 && max_timestep > 0) || timestep == 0)
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continue;
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std::vector<int> vec = satgen.importSigSpec(chunksig, timestep);
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info.timestep = timestep;
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info.offset = modelExpressions.size();
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modelExpressions.insert(modelExpressions.end(), vec.begin(), vec.end());
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modelInfo.insert(info);
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}
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}
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// Add zero step signals as collected by satgen
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modelSig = satgen.initial_signals.export_all();
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for (auto &c : modelSig.chunks)
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if (c.wire != NULL) {
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ModelBlockInfo info;
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RTLIL::SigSpec chunksig = c;
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info.timestep = 0;
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info.offset = modelExpressions.size();
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info.width = chunksig.width;
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info.description = log_signal(chunksig);
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std::vector<int> vec = satgen.importSigSpec(chunksig, 1);
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modelExpressions.insert(modelExpressions.end(), vec.begin(), vec.end());
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modelInfo.insert(info);
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}
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}
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void print_model()
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{
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int maxModelName = 10;
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int maxModelWidth = 10;
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for (auto &info : modelInfo) {
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maxModelName = std::max(maxModelName, int(info.description.size()));
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maxModelWidth = std::max(maxModelWidth, info.width);
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}
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log("\n");
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int last_timestep = -2;
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for (auto &info : modelInfo)
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{
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RTLIL::Const value;
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for (int i = 0; i < info.width; i++) {
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value.bits.push_back(modelValues.at(info.offset+i) ? RTLIL::State::S1 : RTLIL::State::S0);
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if (modelValues.size() == 2*modelExpressions.size() && modelValues.at(modelExpressions.size()+info.offset+i))
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value.bits.back() = RTLIL::State::Sx;
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}
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if (info.timestep != last_timestep) {
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const char *hline = "---------------------------------------------------------------------------------------------------"
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"---------------------------------------------------------------------------------------------------"
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"---------------------------------------------------------------------------------------------------";
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if (last_timestep == -2) {
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log(max_timestep > 0 ? " Time " : " ");
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log("%-*s %10s %10s %*s\n", maxModelName+10, "Signal Name", "Dec", "Hex", maxModelWidth+5, "Bin");
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}
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log(max_timestep > 0 ? " ---- " : " ");
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log("%*.*s %10.10s %10.10s %*.*s\n", maxModelName+10, maxModelName+10,
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hline, hline, hline, maxModelWidth+5, maxModelWidth+5, hline);
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last_timestep = info.timestep;
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}
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if (max_timestep > 0) {
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if (info.timestep > 0)
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log(" %4d ", info.timestep);
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else
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log(" init ");
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} else
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log(" ");
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if (info.width <= 32)
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log("%-*s %10d %10x %*s\n", maxModelName+10, info.description.c_str(), value.as_int(), value.as_int(), maxModelWidth+5, value.as_string().c_str());
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else
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log("%-*s %10s %10s %*s\n", maxModelName+10, info.description.c_str(), "--", "--", maxModelWidth+5, value.as_string().c_str());
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}
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if (last_timestep == -2)
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log(" no model variables selected for display.\n");
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}
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void invalidate_model()
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{
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std::vector<int> clause;
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for (size_t i = 0; i < modelExpressions.size(); i++)
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clause.push_back(modelValues.at(i) ? ez.NOT(modelExpressions.at(i)) : modelExpressions.at(i));
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ez.assume(ez.expression(ezSAT::OpOr, clause));
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}
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};
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struct SatSolvePass : public Pass {
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SatSolvePass() : Pass("sat_solve", "solve a SAT problem in the circuit") { }
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virtual void help()
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@ -204,268 +481,36 @@ struct SatSolvePass : public Pass {
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if (module == NULL)
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log_cmd_error("Can't perform SAT_SOLVE on an empty selection!\n");
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ezDefaultSAT ez;
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SigMap sigmap(module);
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SatGen satgen(&ez, design, &sigmap);
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SatHelper sathelper(design, module);
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sathelper.sets = sets;
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sathelper.sets_at = sets_at;
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sathelper.unsets_at = unsets_at;
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sathelper.shows = shows;
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// when no -show is passed, the set signals and other data is collected in
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// this variables, which is then used to generate the list of signals
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// on the input cone on the set signals and used as show signals
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SigPool show_signal_pool;
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SigSet<RTLIL::Cell*> show_drivers;
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std::map<RTLIL::Cell*,RTLIL::SigSpec> show_driven;
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CellTypes ct(design);
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for (int timestep = -1; timestep <= seq_len; timestep++)
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{
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// set timestep=-1 for non-seq problems and timestep=1:N for seq problems
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if ((timestep == -1 && seq_len > 0) || timestep == 0)
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continue;
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if (timestep > 0)
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log ("\nSetting up time step %d:\n", timestep);
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else
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log ("\nSetting up SAT problem:\n");
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RTLIL::SigSpec big_lhs, big_rhs;
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for (auto &s : sets)
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{
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RTLIL::SigSpec lhs, rhs;
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if (!parse_sigstr(lhs, module, s.first))
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log_cmd_error("Failed to parse lhs set expression `%s'.\n", s.first.c_str());
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if (!parse_sigstr(rhs, module, s.second))
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log_cmd_error("Failed to parse rhs set expression `%s'.\n", s.second.c_str());
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show_signal_pool.add(sigmap(lhs));
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show_signal_pool.add(sigmap(rhs));
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if (lhs.width != rhs.width)
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log_cmd_error("Set expression with different lhs and rhs sizes: %s (%s, %d bits) vs. %s (%s, %d bits)\n",
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s.first.c_str(), log_signal(lhs), lhs.width, s.second.c_str(), log_signal(rhs), rhs.width);
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log("Import set-constraint: %s = %s\n", log_signal(lhs), log_signal(rhs));
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big_lhs.remove2(lhs, &big_rhs);
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big_lhs.append(lhs);
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big_rhs.append(rhs);
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}
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for (auto &s : sets_at[timestep])
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{
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RTLIL::SigSpec lhs, rhs;
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if (!parse_sigstr(lhs, module, s.first))
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log_cmd_error("Failed to parse lhs set expression `%s'.\n", s.first.c_str());
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if (!parse_sigstr(rhs, module, s.second))
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log_cmd_error("Failed to parse rhs set expression `%s'.\n", s.second.c_str());
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show_signal_pool.add(sigmap(lhs));
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show_signal_pool.add(sigmap(rhs));
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if (lhs.width != rhs.width)
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log_cmd_error("Set expression with different lhs and rhs sizes: %s (%s, %d bits) vs. %s (%s, %d bits)\n",
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s.first.c_str(), log_signal(lhs), lhs.width, s.second.c_str(), log_signal(rhs), rhs.width);
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log("Import set-constraint for timestep: %s = %s\n", log_signal(lhs), log_signal(rhs));
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big_lhs.remove2(lhs, &big_rhs);
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big_lhs.append(lhs);
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big_rhs.append(rhs);
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}
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for (auto &s : unsets_at[timestep])
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{
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RTLIL::SigSpec lhs;
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if (!parse_sigstr(lhs, module, s))
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log_cmd_error("Failed to parse lhs set expression `%s'.\n", s.c_str());
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show_signal_pool.add(sigmap(lhs));
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log("Import unset-constraint for timestep: %s\n", log_signal(lhs));
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big_lhs.remove2(lhs, &big_rhs);
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}
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log("Final constraint equation: %s = %s\n", log_signal(big_lhs), log_signal(big_rhs));
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std::vector<int> lhs_vec = satgen.importSigSpec(big_lhs, timestep);
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std::vector<int> rhs_vec = satgen.importSigSpec(big_rhs, timestep);
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ez.assume(ez.vec_eq(lhs_vec, rhs_vec));
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int import_cell_counter = 0;
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for (auto &c : module->cells)
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if (design->selected(module, c.second) && ct.cell_known(c.second->type)) {
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// log("Import cell: %s\n", RTLIL::id2cstr(c.first));
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if (satgen.importCell(c.second, timestep)) {
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for (auto &p : c.second->connections)
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if (ct.cell_output(c.second->type, p.first))
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show_drivers.insert(sigmap(p.second), c.second);
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else
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show_driven[c.second].append(sigmap(p.second));
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import_cell_counter++;
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} else
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log("Warning: failed to import cell %s (type %s) to SAT database.\n", RTLIL::id2cstr(c.first), RTLIL::id2cstr(c.second->type));
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}
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log("Imported %d cells to SAT database.\n", import_cell_counter);
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}
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struct ModelBlockInfo {
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int timestep, offset, width;
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std::string description;
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bool operator < (const ModelBlockInfo &other) const {
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if (timestep != other.timestep)
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return timestep < other.timestep;
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if (description != other.description)
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return description < other.description;
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if (offset != other.offset)
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return offset < other.offset;
|
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if (width != other.width)
|
||||
return width < other.width;
|
||||
return false;
|
||||
}
|
||||
};
|
||||
|
||||
std::vector<int> modelExpressions;
|
||||
std::vector<bool> modelValues;
|
||||
std::set<ModelBlockInfo> modelInfo;
|
||||
|
||||
// Add "normal" show signals for every timestep
|
||||
|
||||
RTLIL::SigSpec modelSig;
|
||||
|
||||
if (shows.size() == 0) {
|
||||
SigPool handled_signals, final_signals;
|
||||
for (auto &s : show_driven)
|
||||
s.second.sort_and_unify();
|
||||
while (show_signal_pool.size() > 0) {
|
||||
RTLIL::SigSpec sig = show_signal_pool.export_one();
|
||||
show_signal_pool.del(sig);
|
||||
handled_signals.add(sig);
|
||||
std::set<RTLIL::Cell*> drivers = show_drivers.find(sig);
|
||||
if (drivers.size() == 0) {
|
||||
final_signals.add(sig);
|
||||
} else {
|
||||
for (auto &d : drivers)
|
||||
for (auto &p : d->connections)
|
||||
show_signal_pool.add(handled_signals.remove(p.second));
|
||||
}
|
||||
}
|
||||
modelSig = final_signals.export_all();
|
||||
} else {
|
||||
for (auto &s : shows) {
|
||||
RTLIL::SigSpec sig;
|
||||
if (!parse_sigstr(sig, module, s))
|
||||
log_cmd_error("Failed to parse show expression `%s'.\n", s.c_str());
|
||||
log("Import show expression: %s\n", log_signal(sig));
|
||||
modelSig.append(sig);
|
||||
}
|
||||
}
|
||||
|
||||
modelSig.sort_and_unify();
|
||||
// log("Model signals: %s\n", log_signal(modelSig));
|
||||
|
||||
for (auto &c : modelSig.chunks)
|
||||
if (c.wire != NULL) {
|
||||
ModelBlockInfo info;
|
||||
RTLIL::SigSpec chunksig = c;
|
||||
info.width = chunksig.width;
|
||||
info.description = log_signal(chunksig);
|
||||
|
||||
for (int timestep = -1; timestep <= seq_len; timestep++) {
|
||||
if ((timestep == -1 && seq_len > 0) || timestep == 0)
|
||||
continue;
|
||||
std::vector<int> vec = satgen.importSigSpec(chunksig, timestep);
|
||||
info.timestep = timestep;
|
||||
info.offset = modelExpressions.size();
|
||||
modelExpressions.insert(modelExpressions.end(), vec.begin(), vec.end());
|
||||
modelInfo.insert(info);
|
||||
}
|
||||
}
|
||||
|
||||
// Add zero step signals as collected by satgen
|
||||
|
||||
modelSig = satgen.initial_signals.export_all();
|
||||
for (auto &c : modelSig.chunks)
|
||||
if (c.wire != NULL) {
|
||||
ModelBlockInfo info;
|
||||
RTLIL::SigSpec chunksig = c;
|
||||
info.timestep = 0;
|
||||
info.offset = modelExpressions.size();
|
||||
info.width = chunksig.width;
|
||||
info.description = log_signal(chunksig);
|
||||
std::vector<int> vec = satgen.importSigSpec(chunksig, 1);
|
||||
modelExpressions.insert(modelExpressions.end(), vec.begin(), vec.end());
|
||||
modelInfo.insert(info);
|
||||
}
|
||||
if (seq_len == 0)
|
||||
sathelper.setup();
|
||||
else
|
||||
for (int timestep = 1; timestep <= seq_len; timestep++)
|
||||
sathelper.setup(timestep);
|
||||
sathelper.generate_model();
|
||||
|
||||
#if 0
|
||||
// print CNF for debugging
|
||||
ez.printDIMACS(stdout, true);
|
||||
sathelper.ez.printDIMACS(stdout, true);
|
||||
#endif
|
||||
|
||||
rerun_solver:
|
||||
log("\nSolving problem with %d variables and %d clauses..\n", ez.numCnfVariables(), ez.numCnfClauses());
|
||||
if (ez.solve(modelExpressions, modelValues))
|
||||
{
|
||||
log("\nSolving problem with %d variables and %d clauses..\n",
|
||||
sathelper.ez.numCnfVariables(), sathelper.ez.numCnfClauses());
|
||||
if (sathelper.solve()) {
|
||||
log("SAT solving finished - model found:\n");
|
||||
log("\n");
|
||||
|
||||
int maxModelName = 10;
|
||||
int maxModelWidth = 10;
|
||||
|
||||
for (auto &info : modelInfo) {
|
||||
maxModelName = std::max(maxModelName, int(info.description.size()));
|
||||
maxModelWidth = std::max(maxModelWidth, info.width);
|
||||
}
|
||||
|
||||
int last_timestep = -2;
|
||||
for (auto &info : modelInfo)
|
||||
{
|
||||
RTLIL::Const value;
|
||||
for (int i = 0; i < info.width; i++) {
|
||||
value.bits.push_back(modelValues.at(info.offset+i) ? RTLIL::State::S1 : RTLIL::State::S0);
|
||||
if (modelValues.size() == 2*modelExpressions.size() && modelValues.at(modelExpressions.size()+info.offset+i))
|
||||
value.bits.back() = RTLIL::State::Sx;
|
||||
}
|
||||
|
||||
if (info.timestep != last_timestep) {
|
||||
const char *hline = "---------------------------------------------------------------------------------------------------"
|
||||
"---------------------------------------------------------------------------------------------------"
|
||||
"---------------------------------------------------------------------------------------------------";
|
||||
if (last_timestep == -2) {
|
||||
log(seq_len > 0 ? " Time " : " ");
|
||||
log("%-*s %10s %10s %*s\n", maxModelName+10, "Signal Name", "Dec", "Hex", maxModelWidth+5, "Bin");
|
||||
}
|
||||
log(seq_len > 0 ? " ---- " : " ");
|
||||
log("%*.*s %10.10s %10.10s %*.*s\n", maxModelName+10, maxModelName+10,
|
||||
hline, hline, hline, maxModelWidth+5, maxModelWidth+5, hline);
|
||||
last_timestep = info.timestep;
|
||||
}
|
||||
|
||||
if (seq_len > 0) {
|
||||
if (info.timestep > 0)
|
||||
log(" %4d ", info.timestep);
|
||||
else
|
||||
log(" init ");
|
||||
} else
|
||||
log(" ");
|
||||
|
||||
if (info.width <= 32)
|
||||
log("%-*s %10d %10x %*s\n", maxModelName+10, info.description.c_str(), value.as_int(), value.as_int(), maxModelWidth+5, value.as_string().c_str());
|
||||
else
|
||||
log("%-*s %10s %10s %*s\n", maxModelName+10, info.description.c_str(), "--", "--", maxModelWidth+5, value.as_string().c_str());
|
||||
}
|
||||
|
||||
if (last_timestep == -2)
|
||||
log(" no model variables selected for display.\n");
|
||||
|
||||
sathelper.print_model();
|
||||
if (loopcount != 0) {
|
||||
std::vector<int> clause;
|
||||
for (size_t i = 0; i < modelExpressions.size(); i++)
|
||||
clause.push_back(modelValues.at(i) ? ez.NOT(modelExpressions.at(i)) : modelExpressions.at(i));
|
||||
ez.assume(ez.expression(ezSAT::OpOr, clause));
|
||||
loopcount--;
|
||||
sathelper.invalidate_model();
|
||||
goto rerun_solver;
|
||||
}
|
||||
}
|
||||
else
|
||||
} else
|
||||
log("SAT solving finished - no model found.\n");
|
||||
}
|
||||
} SatSolvePass;
|
||||
|
|
Loading…
Reference in New Issue