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Use input default values in hierarchy pass 

Signed-off-by: Clifford Wolf <clifford@clifford.at>
This commit is contained in:
Clifford Wolf 2019-06-19 11:49:20 +02:00
parent 8d0cd529c9
commit 3da5288ce0
1 changed files with 38 additions and 0 deletions
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38
passes/hierarchy/hierarchy.cc
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@ -591,6 +591,9 @@ struct HierarchyPass : public Pass {
log(" module instances when the width does not match the module port. This\n");
log(" option disables this behavior.\n");
log("\n");
log(" -nodefaults\n");
log(" do not resolve input port default values\n");
log("\n");
log(" -nokeep_asserts\n");
log(" per default this pass sets the \"keep\" attribute on all modules\n");
log(" that directly or indirectly contain one or more formal properties.\n");
@ -645,6 +648,7 @@ struct HierarchyPass : public Pass {
bool generate_mode = false;
bool keep_positionals = false;
bool keep_portwidths = false;
bool nodefaults = false;
bool nokeep_asserts = false;
std::vector<std::string> generate_cells;
std::vector<generate_port_decl_t> generate_ports;
@ -712,6 +716,10 @@ struct HierarchyPass : public Pass {
keep_portwidths = true;
continue;
}
if (args[argidx] == "-nodefaults") {
nodefaults = true;
continue;
}
if (args[argidx] == "-nokeep_asserts") {
nokeep_asserts = true;
continue;
@ -940,6 +948,36 @@ struct HierarchyPass : public Pass {
}
}
if (!nodefaults)
{
dict<IdString, dict<IdString, Const>> defaults_db;
for (auto module : design->modules())
for (auto wire : module->wires())
if (wire->port_input && wire->attributes.count("\\defaultvalue"))
defaults_db[module->name][wire->name] = wire->attributes.at("\\defaultvalue");
for (auto module : design->modules())
for (auto cell : module->cells())
{
if (defaults_db.count(cell->type) == 0)
continue;
if (keep_positionals) {
bool found_positionals = false;
for (auto &conn : cell->connections())
if (conn.first[0] == '$' && '0' <= conn.first[1] && conn.first[1] <= '9')
found_positionals = true;
if (found_positionals)
continue;
}
for (auto &it : defaults_db.at(cell->type))
if (!cell->hasPort(it.first))
cell->setPort(it.first, it.second);
}
}
std::set<Module*> blackbox_derivatives;
std::vector<Module*> design_modules = design->modules();