write_path_spice handle subckt calls in library subckts
Signed-off-by: James Cherry <cherry@parallaxsw.com>
This commit is contained in:
James Cherry
parent
054b5045d3
commit
458a7cf0d1
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@ -48,6 +48,8 @@ namespace sta {
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using std::string;
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using std::ofstream;
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using std::ifstream;
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using std::max;
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using std::set;
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typedef Map<string, StringVector*> CellSpicePortNames;
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typedef int Stage;
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@ -98,8 +100,8 @@ private:
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DcalcAPIndex dcalc_ap_index);
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void writeStageParasitics(Stage stage);
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void writeSubckts();
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void findPathCellnames(// Return values.
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StringSet &path_cell_names);
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set<string> findPathCellnames();
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void findPathCellSubckts(set<string> &path_cell_names);
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void recordSpicePortNames(const char *cell_name,
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StringVector &tokens);
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float maxTime();
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@ -332,6 +334,18 @@ WritePathSpice::writeSpice()
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throw FileNotWritable(spice_filename_);
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}
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// Use c++17 fs::path(filename).stem()
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static string
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filenameStem(const char *filename)
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{
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string filename1 = filename;
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const size_t last_slash_idx = filename1.find_last_of("\\/");
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if (last_slash_idx != std::string::npos)
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return filename1.substr(last_slash_idx + 1);
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else
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return filename1;
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}
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void
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WritePathSpice::writeHeader()
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{
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@ -348,7 +362,8 @@ WritePathSpice::writeHeader()
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float temp = pvt->temperature();
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streamPrint(spice_stream_, ".temp %.1f\n", temp);
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streamPrint(spice_stream_, ".include \"%s\"\n", model_filename_);
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streamPrint(spice_stream_, ".include \"%s\"\n", subckt_filename_);
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string subckt_filename_stem = filenameStem(subckt_filename_);
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streamPrint(spice_stream_, ".include \"%s\"\n", subckt_filename_stem.c_str());
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float max_time = maxTime();
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float time_step = max_time / 1e+3;
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@ -373,9 +388,8 @@ WritePathSpice::maxTime()
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}
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else {
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float end_slew = findSlew(path_);
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float max_time = delayAsFloat(input_slew
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+ path_->arrival(this)
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+ end_slew * 2) * 1.5;
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float arrival = delayAsFloat(path_->arrival(this));
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float max_time = input_slew / 2.0 + arrival + end_slew;
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return max_time;
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}
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}
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@ -1342,8 +1356,8 @@ WritePathSpice::nodeName(ParasiticNode *node)
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void
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WritePathSpice::writeSubckts()
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{
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StringSet path_cell_names;
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findPathCellnames(path_cell_names);
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set<string> path_cell_names = findPathCellnames();
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findPathCellSubckts(path_cell_names);
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ifstream lib_subckts_stream(lib_subckt_filename_);
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if (lib_subckts_stream.is_open()) {
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@ -1357,7 +1371,7 @@ WritePathSpice::writeSubckts()
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if (tokens.size() >= 2
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&& stringEqual(tokens[0].c_str(), ".subckt")) {
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const char *cell_name = tokens[1].c_str();
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if (path_cell_names.hasKey(cell_name)) {
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if (path_cell_names.find(cell_name) != path_cell_names.end()) {
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subckts_stream << line << "\n";
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bool found_ends = false;
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while (getline(lib_subckts_stream, line)) {
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@ -1379,10 +1393,14 @@ WritePathSpice::writeSubckts()
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lib_subckts_stream.close();
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if (!path_cell_names.empty()) {
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report_->error(28, "The following subkcts are missing from %s",
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lib_subckt_filename_);
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for (const char *cell_name : path_cell_names)
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report_->reportLine(" %s", cell_name);
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string missing_cells;
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for (const string &cell_name : path_cell_names) {
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missing_cells += "\n";
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missing_cells += cell_name;
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}
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report_->error(28, "The subkct file %s is missing definitions for %s",
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lib_subckt_filename_,
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missing_cells.c_str());
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}
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}
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else {
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@ -1394,10 +1412,10 @@ WritePathSpice::writeSubckts()
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throw FileNotReadable(lib_subckt_filename_);
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}
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void
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WritePathSpice::findPathCellnames(// Return values.
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StringSet &path_cell_names)
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set<string>
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WritePathSpice::findPathCellnames()
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{
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set<string> path_cell_names;
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for (Stage stage = stageFirst(); stage <= stageLast(); stage++) {
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TimingArc *arc = stageGateArc(stage);
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if (arc) {
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@ -1420,6 +1438,47 @@ WritePathSpice::findPathCellnames(// Return values.
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delete pin_iter;
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}
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}
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return path_cell_names;
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}
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// Subckts can call subckts (asap7).
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void
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WritePathSpice::findPathCellSubckts(set<string> &path_cell_names)
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{
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ifstream lib_subckts_stream(lib_subckt_filename_);
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if (lib_subckts_stream.is_open()) {
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string line;
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while (getline(lib_subckts_stream, line)) {
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// .subckt <cell_name> [args..]
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StringVector tokens;
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split(line, " \t", tokens);
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if (tokens.size() >= 2
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&& stringEqual(tokens[0].c_str(), ".subckt")) {
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const char *cell_name = tokens[1].c_str();
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if (path_cell_names.find(cell_name) != path_cell_names.end()) {
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// Scan the subckt definition for subckt calls.
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string stmt;
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while (getline(lib_subckts_stream, line)) {
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if (line[0] == '+')
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stmt += line.substr(1);
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else {
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// Process previous statement.
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if (tolower(stmt[0]) == 'x') {
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split(stmt, " \t", tokens);
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string &subckt_cell = tokens[tokens.size() - 1];
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path_cell_names.insert(subckt_cell);
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}
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stmt = line;
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}
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if (stringBeginEqual(line.c_str(), ".ends"))
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break;
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}
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}
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}
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}
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}
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else
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throw FileNotReadable(lib_subckt_filename_);
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}
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void
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