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Added "top" attribute to mark top module in hierarchy

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This commit is contained in:
Clifford Wolf 2013-11-24 05:03:43 +01:00
parent a4edecb0ca
commit 28093d9dd2
6 changed files with 63 additions and 3 deletions
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17
passes/hierarchy/hierarchy.cc
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@ -280,6 +280,10 @@ struct HierarchyPass : public Pass {
log(" use the specified top module to built a design hierarchy. modules\n");
log(" outside this tree (unused modules) are removed.\n");
log("\n");
log(" when the -top option is used, the 'top' attribute will be set on the\n");
log(" specified top module. otherwise a module with the 'top' attribute set\n");
log(" will implicitly be used as top module, if such a module exists.\n");
log("\n");
log("In -generate mode this pass generates blackbox modules for the given cell\n");
log("types (wildcards supported). For this the design is searched for cells that\n");
log("match the given types and then the given port declarations are used to\n");
@ -381,6 +385,11 @@ struct HierarchyPass : public Pass {
log_push();
if (top_mod == NULL)
for (auto &mod_it : design->modules)
if (mod_it.second->get_bool_attribute("\\top"))
top_mod = mod_it.second;
if (top_mod != NULL)
hierarchy(design, top_mod);
@ -407,6 +416,14 @@ struct HierarchyPass : public Pass {
hierarchy(design, top_mod);
}
if (top_mod != NULL) {
for (auto &mod_it : design->modules)
if (mod_it.second == top_mod)
mod_it.second->attributes["\\top"] = RTLIL::Const(1);
else
mod_it.second->attributes.erase("\\top");
}
if (!keep_positionals)
{
std::set<RTLIL::Module*> pos_mods;