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-rw-r--r--passes/sat/sim.cc319
1 files changed, 319 insertions, 0 deletions
diff --git a/passes/sat/sim.cc b/passes/sat/sim.cc
index 5b69dd3bf..c46c1509a 100644
--- a/passes/sat/sim.cc
+++ b/passes/sat/sim.cc
@@ -1327,6 +1327,210 @@ struct SimWorker : SimShared
register_output_step(10*cycle);
write_output_files();
}
+
+ std::string define_signal(Wire *wire)
+ {
+ std::stringstream f;
+
+ if (wire->width==1)
+ f << stringf("%s", RTLIL::unescape_id(wire->name).c_str());
+ else
+ if (wire->upto)
+ f << stringf("[%d:%d] %s", wire->start_offset, wire->width - 1 + wire->start_offset, RTLIL::unescape_id(wire->name).c_str());
+ else
+ f << stringf("[%d:%d] %s", wire->width - 1 + wire->start_offset, wire->start_offset, RTLIL::unescape_id(wire->name).c_str());
+ return f.str();
+ }
+
+ std::string signal_list(std::map<Wire*,fstHandle> &signals)
+ {
+ std::stringstream f;
+ for(auto item=signals.begin();item!=signals.end();item++)
+ f << stringf("%c%s", (item==signals.begin() ? ' ' : ','), RTLIL::unescape_id(item->first->name).c_str());
+ return f.str();
+ }
+
+ void generate_tb(Module *topmod, std::string tb_filename, int numcycles)
+ {
+ fst = new FstData(sim_filename);
+
+ if (scope.empty())
+ log_error("Scope must be defined for co-simulation.\n");
+
+ if ((clock.size()+clockn.size())==0)
+ log_error("Clock signal must be specified.\n");
+
+ std::vector<fstHandle> fst_clock;
+ std::map<Wire*,fstHandle> clocks;
+
+ for (auto portname : clock)
+ {
+ Wire *w = topmod->wire(portname);
+ if (!w)
+ log_error("Can't find port %s on module %s.\n", log_id(portname), log_id(top->module));
+ if (!w->port_input)
+ log_error("Clock port %s on module %s is not input.\n", log_id(portname), log_id(top->module));
+ fstHandle id = fst->getHandle(scope + "." + RTLIL::unescape_id(portname));
+ if (id==0)
+ log_error("Can't find port %s.%s in FST.\n", scope.c_str(), log_id(portname));
+ fst_clock.push_back(id);
+ clocks[w] = id;
+ }
+ for (auto portname : clockn)
+ {
+ Wire *w = topmod->wire(portname);
+ if (!w)
+ log_error("Can't find port %s on module %s.\n", log_id(portname), log_id(top->module));
+ if (!w->port_input)
+ log_error("Clock port %s on module %s is not input.\n", log_id(portname), log_id(top->module));
+ fstHandle id = fst->getHandle(scope + "." + RTLIL::unescape_id(portname));
+ if (id==0)
+ log_error("Can't find port %s.%s in FST.\n", scope.c_str(), log_id(portname));
+ fst_clock.push_back(id);
+ clocks[w] = id;
+ }
+
+ SigMap sigmap(topmod);
+ std::map<Wire*,fstHandle> inputs;
+ std::map<Wire*,fstHandle> outputs;
+
+ for (auto wire : topmod->wires()) {
+ fstHandle id = fst->getHandle(scope + "." + RTLIL::unescape_id(wire->name));
+ if (id==0 && (wire->port_input || wire->port_output))
+ log_error("Unable to find required '%s' signal in file\n",(scope + "." + RTLIL::unescape_id(wire->name)).c_str());
+ if (wire->port_input)
+ if (clocks.find(wire)==clocks.end())
+ inputs[wire] = id;
+ if (wire->port_output)
+ outputs[wire] = id;
+ }
+
+ uint64_t startCount = 0;
+ uint64_t stopCount = 0;
+ if (start_time==0) {
+ if (start_time < fst->getStartTime())
+ log_warning("Start time is before simulation file start time\n");
+ startCount = fst->getStartTime();
+ } else if (start_time==-1)
+ startCount = fst->getEndTime();
+ else {
+ startCount = start_time / fst->getTimescale();
+ if (startCount > fst->getEndTime()) {
+ startCount = fst->getEndTime();
+ log_warning("Start time is after simulation file end time\n");
+ }
+ }
+ if (stop_time==0) {
+ if (stop_time < fst->getStartTime())
+ log_warning("Stop time is before simulation file start time\n");
+ stopCount = fst->getStartTime();
+ } else if (stop_time==-1)
+ stopCount = fst->getEndTime();
+ else {
+ stopCount = stop_time / fst->getTimescale();
+ if (stopCount > fst->getEndTime()) {
+ stopCount = fst->getEndTime();
+ log_warning("Stop time is after simulation file end time\n");
+ }
+ }
+ if (stopCount<startCount) {
+ log_error("Stop time is before start time\n");
+ }
+
+ int cycle = 0;
+ log("Generate testbench data from %lu%s to %lu%s", (unsigned long)startCount, fst->getTimescaleString(), (unsigned long)stopCount, fst->getTimescaleString());
+ if (cycles_set)
+ log(" for %d clock cycle(s)",numcycles);
+ log("\n");
+
+ std::stringstream f;
+ f << stringf("`timescale 1%s/1%s\n", fst->getTimescaleString(),fst->getTimescaleString());
+ f << stringf("module %s();\n",tb_filename.c_str());
+ int clk_len = 0;
+ int inputs_len = 0;
+ int outputs_len = 0;
+ for(auto &item : clocks) {
+ clk_len += item.first->width;
+ f << "\treg " << define_signal(item.first) << ";\n";
+ }
+ for(auto &item : inputs) {
+ inputs_len += item.first->width;
+ f << "\treg " << define_signal(item.first) << ";\n";
+ }
+ for(auto &item : outputs) {
+ outputs_len += item.first->width;
+ f << "\twire " << define_signal(item.first) << ";\n";
+ }
+ int data_len = clk_len + inputs_len + outputs_len + 32;
+ f << "\n";
+ f << stringf("\t%s uut(",RTLIL::unescape_id(topmod->name).c_str());
+ for(auto item=clocks.begin();item!=clocks.end();item++)
+ f << stringf("%c.%s(%s)", (item==clocks.begin() ? ' ' : ','), RTLIL::unescape_id(item->first->name).c_str(), RTLIL::unescape_id(item->first->name).c_str());
+ for(auto &item : inputs)
+ f << stringf(",.%s(%s)", RTLIL::unescape_id(item.first->name).c_str(), RTLIL::unescape_id(item.first->name).c_str());
+ for(auto &item : outputs)
+ f << stringf(",.%s(%s)", RTLIL::unescape_id(item.first->name).c_str(), RTLIL::unescape_id(item.first->name).c_str());
+ f << ");\n";
+ f << "\n";
+ f << "\tinteger i;\n";
+ uint64_t prev_time = startCount;
+ log("Writing data to `%s`\n", (tb_filename+".txt").c_str());
+ std::ofstream data_file(tb_filename+".txt");
+ try {
+ fst->reconstructAllAtTimes(fst_clock, startCount, stopCount, [&](uint64_t time) {
+ for(auto &item : clocks)
+ data_file << stringf("%s",fst->valueOf(item.second).c_str());
+ for(auto &item : inputs)
+ data_file << stringf("%s",fst->valueOf(item.second).c_str());
+ for(auto &item : outputs)
+ data_file << stringf("%s",fst->valueOf(item.second).c_str());
+ data_file << stringf("%s\n",Const(time-prev_time).as_string().c_str());
+
+ cycle++;
+ prev_time = time;
+
+ // Limit to number of cycles if provided
+ if (cycles_set && cycle > numcycles *2)
+ throw fst_end_of_data_exception();
+ if (time==stopCount)
+ throw fst_end_of_data_exception();
+ });
+ } catch(fst_end_of_data_exception) {
+ // end of data detected
+ }
+
+ f << stringf("\treg [0:%d] data [0:%d];\n", data_len-1, cycle-1);
+ f << "\tinitial begin;\n";
+ f << stringf("\t\t$dumpfile(\"%s\");\n",tb_filename.c_str());
+ f << stringf("\t\t$dumpvars(0,%s);\n",tb_filename.c_str());
+ f << stringf("\t\t$readmemb(\"%s.txt\", data);\n",tb_filename.c_str());
+
+ f << stringf("\t\t#(data[0][%d:%d]);\n", data_len-32, data_len-1);
+ f << stringf("\t\t{%s } = data[0][%d:%d];\n", signal_list(clocks).c_str(), 0, clk_len-1);
+ f << stringf("\t\t{%s } <= data[0][%d:%d];\n", signal_list(inputs).c_str(), clk_len, clk_len+inputs_len-1);
+
+ f << stringf("\t\tfor (i = 1; i < %d; i++) begin\n",cycle);
+
+ f << stringf("\t\t\t#(data[i][%d:%d]);\n", data_len-32, data_len-1);
+ f << stringf("\t\t\t{%s } = data[i][%d:%d];\n", signal_list(clocks).c_str(), 0, clk_len-1);
+ f << stringf("\t\t\t{%s } <= data[i][%d:%d];\n", signal_list(inputs).c_str(), clk_len, clk_len+inputs_len-1);
+
+ f << stringf("\t\t\tif ({%s } != data[i-1][%d:%d]) begin\n", signal_list(outputs).c_str(), clk_len+inputs_len, clk_len+inputs_len+outputs_len-1);
+ f << "\t\t\t\t$error(\"Signal difference detected\\n\");\n";
+ f << "\t\t\tend\n";
+
+ f << "\t\tend\n";
+
+ f << "\t\t$finish;\n";
+ f << "\tend\n";
+ f << "endmodule\n";
+
+ log("Writing testbench to `%s`\n", (tb_filename+".v").c_str());
+ std::ofstream tb_file(tb_filename+".v");
+ tb_file << f.str();
+
+ delete fst;
+ }
};
struct VCDWriter : public OutputWriter
@@ -1825,4 +2029,119 @@ struct SimPass : public Pass {
}
} SimPass;
+struct Fst2TbPass : public Pass {
+ Fst2TbPass() : Pass("fst2tb", "generate testbench out of fst file") { }
+ void help() override
+ {
+ // |---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|
+ log("\n");
+ log(" fst2tb [options] [top-level]\n");
+ log("\n");
+ log("This command generates testbench for the circuit using the given top-level module\n");
+ log("and simulus signal from FST file\n");
+ log("\n");
+ log(" -tb <name>\n");
+ log(" generated testbench name.\n");
+ log(" files <name>.v and <name>.txt are created as result.\n");
+ log("\n");
+ log(" -r <filename>\n");
+ log(" read simulation FST file\n");
+ log("\n");
+ log(" -clock <portname>\n");
+ log(" name of top-level clock input\n");
+ log("\n");
+ log(" -clockn <portname>\n");
+ log(" name of top-level clock input (inverse polarity)\n");
+ log("\n");
+ log(" -scope <name>\n");
+ log(" scope of simulation top model\n");
+ log("\n");
+ log(" -start <time>\n");
+ log(" start co-simulation in arbitary time (default 0)\n");
+ log("\n");
+ log(" -stop <time>\n");
+ log(" stop co-simulation in arbitary time (default END)\n");
+ log("\n");
+ log(" -n <integer>\n");
+ log(" number of clock cycles to simulate (default: 20)\n");
+ log("\n");
+ }
+
+ void execute(std::vector<std::string> args, RTLIL::Design *design) override
+ {
+ SimWorker worker;
+ int numcycles = 20;
+ bool stop_set = false;
+ std::string tb_filename;
+
+ log_header(design, "Executing FST2FB pass.\n");
+
+ size_t argidx;
+ for (argidx = 1; argidx < args.size(); argidx++) {
+ if (args[argidx] == "-clock" && argidx+1 < args.size()) {
+ worker.clock.insert(RTLIL::escape_id(args[++argidx]));
+ continue;
+ }
+ if (args[argidx] == "-clockn" && argidx+1 < args.size()) {
+ worker.clockn.insert(RTLIL::escape_id(args[++argidx]));
+ continue;
+ }
+ if (args[argidx] == "-r" && argidx+1 < args.size()) {
+ std::string sim_filename = args[++argidx];
+ rewrite_filename(sim_filename);
+ worker.sim_filename = sim_filename;
+ continue;
+ }
+ if (args[argidx] == "-n" && argidx+1 < args.size()) {
+ numcycles = atoi(args[++argidx].c_str());
+ worker.cycles_set = true;
+ continue;
+ }
+ if (args[argidx] == "-scope" && argidx+1 < args.size()) {
+ worker.scope = args[++argidx];
+ continue;
+ }
+ if (args[argidx] == "-start" && argidx+1 < args.size()) {
+ worker.start_time = stringToTime(args[++argidx]);
+ continue;
+ }
+ if (args[argidx] == "-stop" && argidx+1 < args.size()) {
+ worker.stop_time = stringToTime(args[++argidx]);
+ stop_set = true;
+ continue;
+ }
+ if (args[argidx] == "-tb" && argidx+1 < args.size()) {
+ tb_filename = args[++argidx];
+ continue;
+ }
+ break;
+ }
+ extra_args(args, argidx, design);
+ if (stop_set && worker.cycles_set)
+ log_error("'stop' and 'n' can only be used exclusively'\n");
+
+ Module *top_mod = nullptr;
+
+ if (design->full_selection()) {
+ top_mod = design->top_module();
+
+ if (!top_mod)
+ log_cmd_error("Design has no top module, use the 'hierarchy' command to specify one.\n");
+ } else {
+ auto mods = design->selected_whole_modules();
+ if (GetSize(mods) != 1)
+ log_cmd_error("Only one top module must be selected.\n");
+ top_mod = mods.front();
+ }
+
+ if (tb_filename.empty())
+ log_cmd_error("Testbench name must be defined.\n");
+
+ if (worker.sim_filename.empty())
+ log_cmd_error("Stimulus FST file must be defined.\n");
+
+ worker.generate_tb(top_mod, tb_filename, numcycles);
+ }
+} Fst2TbPass;
+
PRIVATE_NAMESPACE_END
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