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https://github.com/YosysHQ/yosys
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add functionality to be able to use parameterised cells.
cells can have their area as a function of the input port width.
This commit is contained in:
clemens
parent
d8fb4da437
commit
5fc0e77c3d
1 changed files with 142 additions and 1 deletions
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@ -34,6 +34,9 @@ PRIVATE_NAMESPACE_BEGIN
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struct cell_area_t {
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struct cell_area_t {
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double area;
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double area;
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bool is_sequential;
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bool is_sequential;
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vector<double> single_parameter_area;
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vector<vector<double>> double_parameter_area;
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vector<string> parameter_names;
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};
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};
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struct statdata_t {
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struct statdata_t {
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@ -206,6 +209,89 @@ struct statdata_t {
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}
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}
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if (!cell_area.empty()) {
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if (!cell_area.empty()) {
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// check if cell_area provides a area calculator
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if (cell_area.count(cell->type)) {
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cell_area_t cell_data = cell_area.at(cell->type);
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if (cell_data.single_parameter_area.size() > 0) {
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// assume that we just take the max of the A,B,Y ports
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int width_a = cell->hasPort(ID::A) ? GetSize(cell->getPort(ID::A)) : 0;
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int width_b = cell->hasPort(ID::B) ? GetSize(cell->getPort(ID::B)) : 0;
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int width_y = cell->hasPort(ID::Y) ? GetSize(cell->getPort(ID::Y)) : 0;
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int width_q = cell->hasPort(ID::Q) ? GetSize(cell->getPort(ID::Q)) : 0;
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int max_width = max<int>({width_a, width_b, width_y, width_q});
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if (!cell_area.count(cell_type)) {
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cell_area[cell_type] = cell_data;
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}
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if (cell_data.single_parameter_area.size() > max_width - 1u) {
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cell_area.at(cell_type).area = cell_data.single_parameter_area.at(max_width - 1);
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cell_area.at(cell_type).is_sequential = cell_data.is_sequential;
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} else {
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printf("too small single_parameter_area %s %d %f\n", cell_type.c_str(), max_width,
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cell_data.single_parameter_area.back());
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cell_area.at(cell_type).area = cell_data.single_parameter_area.back();
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cell_area.at(cell_type).is_sequential = cell_data.is_sequential;
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}
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// printf("single_paramter_extraction %s %d %f\n", cell_type.c_str(), max_width,
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// cell_area.at(cell_type).area);
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}
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vector<double> widths;
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if (cell_data.parameter_names.size() > 0) {
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for (auto &it : cell_data.parameter_names) {
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RTLIL::IdString port_name;
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// TODO: there has to be a better way to do this
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if (it == "A") {
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port_name = ID::A;
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} else if (it == "B") {
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port_name = ID::B;
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} else if (it == "Y") {
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port_name = ID::Y;
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} else if (it == "Q") {
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port_name = ID::Q;
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} else if (it == "S") {
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port_name = ID::S;
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} else {
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port_name = ID(it);
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}
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if (cell->hasPort(port_name)) {
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int width = GetSize(cell->getPort(port_name));
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widths.push_back(width);
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} else {
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widths.push_back(0);
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}
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}
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}
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if (cell_data.double_parameter_area.size() > 0) {
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if (!cell_area.count(cell_type)) {
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cell_area[cell_type] = cell_data;
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}
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if (widths.size() == 2) {
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unsigned int width_a = widths.at(0);
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unsigned int width_b = widths.at(1);
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if (width_a > 0 && width_b > 0) {
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if (cell_data.double_parameter_area.size() > width_a - 1 &&
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cell_data.double_parameter_area.at(width_a - 1).size() > width_b - 1) {
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cell_area.at(cell_type).area =
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cell_data.double_parameter_area.at(width_a - 1).at(width_b - 1);
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cell_area.at(cell_type).is_sequential = cell_data.is_sequential;
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} else {
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printf("too small double_parameter_area %s %d %d %f\n", cell_type.c_str(),
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width_a, width_b, cell_data.double_parameter_area.back().back());
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cell_area.at(cell_type).area = cell_data.double_parameter_area.back().back();
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cell_area.at(cell_type).is_sequential = cell_data.is_sequential;
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}
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} else {
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cell_area.at(cell_type).area = cell_data.area;
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cell_area.at(cell_type).is_sequential = cell_data.is_sequential;
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}
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} else {
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printf("double_paramter_extraction %s %zu %f\n", cell_type.c_str(), widths.size(),
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cell_area.at(cell_type).area);
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}
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}
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}
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if (cell_area.count(cell_type)) {
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if (cell_area.count(cell_type)) {
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cell_area_t cell_data = cell_area.at(cell_type);
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cell_area_t cell_data = cell_area.at(cell_type);
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@ -726,9 +812,64 @@ void read_liberty_cellarea(dict<IdString, cell_area_t> &cell_area, string libert
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const LibertyAst *ar = cell->find("area");
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const LibertyAst *ar = cell->find("area");
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bool is_flip_flop = cell->find("ff") != nullptr;
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bool is_flip_flop = cell->find("ff") != nullptr;
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vector<double> single_parameter_area;
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vector<vector<double>> double_parameter_area;
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vector<string> port_names;
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const LibertyAst *sar = cell->find("single_area_parameterised");
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if (sar != nullptr) {
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for (const auto &s : sar->args) {
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double value = 0;
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auto [ptr, ec] = std::from_chars(s.data(), s.data() + s.size(), value);
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// ec != std::errc() means parse error, or ptr didn't consume entire string
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if (ec != std::errc() || ptr != s.data() + s.size())
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break;
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single_parameter_area.push_back(value);
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}
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if (single_parameter_area.size() == 0)
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printf("error: %s\n", sar->args[single_parameter_area.size() - 1].c_str());
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// check if it is a double parameterised area
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}
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const LibertyAst *dar = cell->find("double_area_parameterised");
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if (dar != nullptr) {
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for (const auto &s : dar->args) {
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// printf("value: %s\n",sar->value.c_str());
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// printf("args1: %s\n",dar->args[0].c_str());
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vector<string> sub_array;
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std::string::size_type start = 0;
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std::string::size_type end = s.find_first_of(",", start);
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while (end != std::string::npos) {
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sub_array.push_back(s.substr(start, end - start));
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start = end + 1;
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end = s.find_first_of(",", start);
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}
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sub_array.push_back(s.substr(start, end));
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vector<double> cast_sub_array;
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for (const auto &s : sub_array) {
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double value = 0;
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auto [ptr, ec] = std::from_chars(s.data() + 1, s.data() + s.size(), value);
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if (ec != std::errc() || ptr != s.data() + s.size())
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break;
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cast_sub_array.push_back(value);
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}
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double_parameter_area.push_back(cast_sub_array);
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if (cast_sub_array.size() == 0)
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printf("error: %s\n", s.c_str());
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}
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}
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const LibertyAst *par = cell->find("port_names");
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if (par != nullptr) {
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for (const auto &s : par->args) {
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port_names.push_back(s);
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}
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}
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if (ar != nullptr && !ar->value.empty()) {
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if (ar != nullptr && !ar->value.empty()) {
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string prefix = cell->args[0].substr(0, 1) == "$" ? "" : "\\";
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string prefix = cell->args[0].substr(0, 1) == "$" ? "" : "\\";
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cell_area[prefix + cell->args[0]] = {atof(ar->value.c_str()), is_flip_flop};
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cell_area[prefix + cell->args[0]] = {atof(ar->value.c_str()), is_flip_flop, single_parameter_area, double_parameter_area,
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port_names};
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}
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}
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}
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}
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}
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}
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