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coriolis
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Handling aliases of non-instantiated nets 

For example $true and $false in Yosys
This commit is contained in:
Gabriel Gouvine 2015-04-13 16:49:06 +02:00
parent 7d5338c9be
commit d7f9e5cb87
1 changed files with 36 additions and 16 deletions
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52
crlcore/src/ccore/blif/BlifParser.cpp
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@ -153,7 +153,7 @@ Cell * Blif::load ( string cellPath ) //, Cell *cell )
or current_names[2] != "1" or current_names[3] != "1"
){
ostringstream mess;
mess << "Name statement is not an alias and will be ignored "
mess << ".names statement is not an alias and will be ignored "
<< "(map to standard cells for functions and tie cells for constants)\n";
for(string const & S: current_names){
mess << S << " ";
@ -295,34 +295,38 @@ Cell * Blif::load ( string cellPath ) //, Cell *cell )
std::vector<Cell*> model_cells;
for(auto M : models){
Cell * design = framework->createCell(M.name);
if(design == NULL){
throw Error("Model " + M.name + " is NULL\n");
}
model_cells.push_back(design);
addSupplyNets(design);
unordered_set<string> net_names;
for(auto const & S : M.subcircuits){
for(auto const & P : S.pins){
net_names.insert(P.second);
net_names.insert(P.second);
}
for(auto const & A : M.aliases){
net_names.insert(A.first);
net_names.insert(A.second);
net_names.insert(A.first);
net_names.insert(A.second);
}
}
for(auto const & P : M.pins){
net_names.insert(P.first);
net_names.insert(P.first);
}
for(string const & N : net_names){
Net* new_net = Net::create( design, N );
auto it = M.pins.find(N);
if(it != M.pins.end()){
new_net->setExternal( true );
new_net->setDirection( it->second );
}
Net* new_net = Net::create( design, N );
auto it = M.pins.find(N);
if(it != M.pins.end()){
new_net->setExternal( true );
new_net->setDirection( it->second );
}
}
}
// Second pass: every cell and its nets have already been created
for(int i=0; i<models.size(); ++i){
cmess2 << "Handling model " << models[i].name << endl;
auto const & M = models[i];
Cell * design = model_cells[i];
for(int j=0; j<M.subcircuits.size(); ++j){
@ -331,22 +335,38 @@ Cell * Blif::load ( string cellPath ) //, Cell *cell )
subckt_name << "subckt_" << j;
Cell * cell = framework->getCell(S.cell, Catalog::State::Views, 0);
if(cell == NULL){
cerr << Error("Cell " + S.cell + " to instanciate hasn't been found\n");
continue;
throw Error("Cell <" + S.cell + "> to instanciate hasn't been found\n");
}
//cmess2 << "Creating instance <" << subckt_name.str() << "> of <" << S.cell << "> in <" << models[i].name << ">" << endl;
Instance* instance = Instance::create( design, subckt_name.str(), cell);
for(auto & P : S.pins){
Net* internalNet = cell->getNet( P.first );
Net* externalNet = design->getNet( P.second );
assert(internalNet != NULL and externalNet != NULL);
assert(internalNet != NULL and externalNet != NULL and instance != NULL);
instance->getPlug( internalNet )->setNet( externalNet );
}
//connectSupplyNets(instance, design);
++i;
}
// Merge the aliased nets
for(auto alias : M.aliases){
design->getNet( alias.first )->merge(design->getNet( alias.second ));
//cmess2 << "Merging nets <" << alias.first << "> and <" << alias.second << ">" << endl;
Net * first_net = design->getNet( alias.first );
Net * second_net = design->getNet( alias.second );
if(first_net == NULL or second_net == NULL){
ostringstream mess;
mess << "Trying to create an alias for non-instantiated nets:";
if(first_net == NULL)
mess << " <" << alias.first << ">";
if(second_net == NULL)
mess << " <" << alias.second << ">";
mess << ", will be ignored\n";
cerr << Warning(mess.str());
continue;
}
if(!first_net->isExternal())
swap(first_net, second_net); // If only one net is external, it needs to be the first
first_net->merge(second_net);
}
}
cmess2 << "BLIF file loaded" << endl;