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sdc: keep_hiearchy

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This commit is contained in:
Emil J. Tywoniak 2025-10-02 16:45:41 +02:00
parent 329a3783e2
commit 4cf0f8e799
1 changed files with 64 additions and 6 deletions
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66
passes/cmds/sdc.cc
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@ -97,6 +97,7 @@ struct SdcObjects {
Graph,
} value_mode;
using CellPin = std::pair<Cell*, IdString>;
Design* design;
std::vector<std::pair<std::string, Wire*>> design_ports;
std::vector<std::pair<std::string, Cell*>> design_cells;
std::vector<std::pair<std::string, CellPin>> design_pins;
@ -158,7 +159,7 @@ struct SdcObjects {
}
}
}
SdcObjects(Design* design) {
SdcObjects(Design* design) : design(design) {
Module* top = design->top_module();
if (!top)
log_error("Top module couldn't be determined. Check 'top' attribute usage");
@ -250,6 +251,47 @@ struct SdcObjects {
}
log("\n");
}
class KeepHierarchyWorker {
std::unordered_set<Module*> tracked_modules = {};
Design* design = nullptr;
bool mark(Module* mod) {
for (auto* cell : mod->cells()) {
if (auto* submod = design->module(cell->type))
if (mark(submod))
return true;
}
if (tracked_modules.count(mod))
return true;
return false;
}
public:
KeepHierarchyWorker(SdcObjects* objects, Design* d) : design(d) {
for (auto [ref, _] : objects->constrained_ports) {
tracked_modules.insert(ref.second->module);
}
for (auto& [_, cell] : objects->constrained_cells) {
tracked_modules.insert(cell->module);
}
for (auto& [ref, _] : objects->constrained_pins) {
tracked_modules.insert(ref.second.first->module);
}
for (auto& [ref, _] : objects->constrained_nets) {
tracked_modules.insert(ref.second->module);
}
log_debug("keep_hierarchy tracked modules:\n");
for (auto* mod : tracked_modules)
log_debug("%s", mod->name);
}
bool mark() {
return mark(design->top_module());
}
};
void keep_hierarchy() {
(void)KeepHierarchyWorker(this, design).mark();
}
};
// TODO vectors
@ -448,9 +490,10 @@ void dump_sdc_graph(const std::vector<SdcGraphNode>& graph, const std::vector<bo
}
}
void inspect_globals(Tcl_Interp* interp) {
void inspect_globals(Tcl_Interp* interp, bool dump_mode) {
std::vector<std::vector<std::string>> sdc_calls = gather_nested_calls(interp);
std::vector<SdcGraphNode> graph = build_graph(sdc_calls);
if (dump_mode)
dump_sdc_graph(graph, node_ownership(graph));
}
@ -743,9 +786,21 @@ struct SdcPass : public Pass {
void execute(std::vector<std::string> args, RTLIL::Design *design) override {
log_header(design, "Executing SDC pass.\n");
size_t argidx;
bool graph_mode = false;
bool dump_mode = false;
bool keep_hierarchy_mode = false;
std::vector<std::string> opensta_stubs_paths;
for (argidx = 1; argidx < args.size(); argidx++) {
if (args[argidx] == "-stubs" && argidx+1 < args.size()) {
if (args[argidx] == "-graph") {
graph_mode = true;
continue;
} else if (args[argidx] == "-dump") {
dump_mode = true;
continue;
} else if (args[argidx] == "-keep_hierarchy") {
keep_hierarchy_mode = true;
continue;
} else if (args[argidx] == "-stubs" && argidx+1 < args.size()) {
opensta_stubs_paths.push_back(args[++argidx]);
continue;
}
@ -767,8 +822,11 @@ struct SdcPass : public Pass {
log_cmd_error("SDC interpreter returned an error in OpenSTA stub file %s: %s\n", path.c_str(), Tcl_GetStringResult(interp));
if (Tcl_EvalFile(interp, sdc_path.c_str()) != TCL_OK)
log_cmd_error("SDC interpreter returned an error: %s\n", Tcl_GetStringResult(interp));
if (dump_mode)
sdc.objects->dump();
inspect_globals(interp);
if (keep_hierarchy_mode)
sdc.objects->keep_hierarchy();
inspect_globals(interp, graph_mode);
Tcl_Release(interp);
}
} SdcPass;