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ice40_opt to restore attributes/name when unwrapping

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This commit is contained in:
Eddie Hung 2019-12-09 14:29:29 -08:00
parent 36a88be609
commit fb203d2a2c
1 changed files with 15 additions and 0 deletions
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15
techlibs/ice40/ice40_opt.cc
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@ -117,6 +117,21 @@ static void run_ice40_opts(Module *module)
if (GetSize(replacement_output)) {
optimized_co.insert(sigmap(cell->getPort("\\CO")[0]));
auto it = cell->attributes.find(ID(SB_LUT4.name));
if (it != cell->attributes.end()) {
module->rename(cell, it->second.decode_string());
decltype(Cell::attributes) new_attr;
for (const auto &a : cell->attributes)
if (a.first.begins_with("\\SB_LUT4.\\"))
new_attr[a.first.c_str() + strlen("\\SB_LUT4.")] = a.second;
else if (a.first == ID(src))
new_attr.insert(std::make_pair(a.first, a.second));
else if (a.first.in(ID(SB_LUT4.name), ID::keep, ID(module_not_derived)))
continue;
else
log_abort();
cell->attributes = std::move(new_attr);
}
module->connect(cell->getPort("\\CO")[0], replacement_output);
module->design->scratchpad_set_bool("opt.did_something", true);
log("Optimized $__ICE40_CARRY_WRAPPER cell back to logic (without SB_CARRY) %s.%s: CO=%s\n",