jcarr
/
coriolis
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

Support for aliases defined with .names construct

This commit is contained in:
Gabriel Gouvine 2015-04-13 14:13:03 +02:00
parent 4035a6cb46
commit 7d5338c9be
1 changed files with 86 additions and 44 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

130
crlcore/src/ccore/blif/BlifParser.cpp
View File

@ -105,6 +105,7 @@ namespace {
string name;
unordered_map<string, Net::Direction> pins;
vector<subckt> subcircuits;
vector<pair<string, string> > aliases;
bool operator<(model const & o) const{ return name < o.name; }
};
@ -136,15 +137,36 @@ Cell * Blif::load ( string cellPath ) //, Cell *cell )
bool hasName;
string line;
vector<string> current_names;
while(getline(ccell, line)){
istringstream linestream(line);
string before_comment;
getline(linestream, before_comment, '#');
istringstream tokens(before_comment);
string token;
while(tokens>>token){
if(tokens >> token){
assert(not token.empty());
if(token[0] == '.'){
// Process finished .names statement
if(not current_names.empty()){
if( current_names.size() != 4
or current_names[2] != "1" or current_names[3] != "1"
){
ostringstream mess;
mess << "Name 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 << " ";
}
mess << "\n";
cerr << Warning(mess.str());
}
else{
// Name statement is an alias: the second signal will map to the first
models.back().aliases.push_back(pair<string, string>(current_names[0], current_names[1]));
}
current_names.clear();
}
if(token == ".model"){
if(state != EXT)
throw Error("Nested model are not supported\n");
@ -162,13 +184,11 @@ Cell * Blif::load ( string cellPath ) //, Cell *cell )
models.back().subcircuits.push_back(subckt());
}
else if(token == ".names"){
cerr << Warning("BLIF names are ignored\n");
if(state == EXT)
throw Error("Names without an enclosing model are not supported\n");
if(state == MODEL and not hasName)
throw Error("Model has no name\n");
state = NAMES;
hasName = false;
}
else if(token == ".latch"){
throw Error("Latch constructs are not understood by the parser\n");
@ -189,53 +209,68 @@ Cell * Blif::load ( string cellPath ) //, Cell *cell )
state = EXT;
}
else{
throw Error("Unexpected control token\n");
ostringstream mess;
mess << "Unknown control token <" << token << ">\n";
throw Error(mess.str());
}
}
else{ // Either a pin or an input/output definition
if(state == INPUTS or state == OUTPUTS){
auto it = models.back().pins.find(token);
Net::Direction D = (state == INPUTS)? Net::Direction::DirIn : Net::Direction::DirOut;
if(it != models.back().pins.end()){
it->second = static_cast<Net::Direction::Code>(D | it->second);
}
else{
models.back().pins.insert(pair<string, Net::Direction>(token, D));
}
}
else if(state == SUBCKT){
if(hasName){
// Encountered a pin: need to be processed
istringstream token_stream(token);
string before_space, after_space;
getline(token_stream, before_space, '=');
getline(token_stream, after_space, '=');
if(token_stream){
Error("Encountered more than one '=' in token");
}
models.back().subcircuits.back().pins.push_back(pair<string, string>(before_space, after_space));
}
else{
models.back().subcircuits.back().cell = token;
hasName = true;
}
}
else if(state == NAMES){
// TODO; now just ignored
}
else if(state == MODEL){
if(hasName)
throw Error("Unexpected token after model name\n");
else{
models.back().name = token;
cmess2 << "Processing model <" << token << ">" << endl;
hasName = true;
}
else if(state == NAMES){
// Part of a cover for a logic function
current_names.push_back(token);
}
else{
ostringstream mess;
mess << "Encountered a non-control token at the beginning of a line: <" << token << ">\n";
throw Error(mess.str());
}
}
// Process all tokens after the control
while(tokens >> token){
assert(not token.empty());
// Either a pin or an input/output definition
if(state == INPUTS or state == OUTPUTS){
auto it = models.back().pins.find(token);
Net::Direction D = (state == INPUTS)? Net::Direction::DirIn : Net::Direction::DirOut;
if(it != models.back().pins.end()){
it->second = static_cast<Net::Direction::Code>(D | it->second);
}
else{
throw Error("Unexpected token\n");
models.back().pins.insert(pair<string, Net::Direction>(token, D));
}
}
else if(state == SUBCKT){
if(hasName){
// Encountered a pin: need to be processed
istringstream token_stream(token);
string before_space, after_space;
getline(token_stream, before_space, '=');
getline(token_stream, after_space, '=');
if(token_stream){
Error("Encountered more than one '=' in token");
}
models.back().subcircuits.back().pins.push_back(pair<string, string>(before_space, after_space));
}
else{
models.back().subcircuits.back().cell = token;
hasName = true;
}
}
else if(state == NAMES){
current_names.push_back(token);
}
else if(state == MODEL){
if(hasName)
throw Error("Unexpected token after model name\n");
else{
models.back().name = token;
cmess2 << "Processing model <" << token << ">" << endl;
hasName = true;
}
}
else{
throw Error("Unexpected token\n");
}
}
line.clear();
}
@ -268,6 +303,10 @@ Cell * Blif::load ( string cellPath ) //, Cell *cell )
for(auto const & P : S.pins){
net_names.insert(P.second);
}
for(auto const & A : M.aliases){
net_names.insert(A.first);
net_names.insert(A.second);
}
}
for(auto const & P : M.pins){
net_names.insert(P.first);
@ -306,6 +345,9 @@ Cell * Blif::load ( string cellPath ) //, Cell *cell )
//connectSupplyNets(instance, design);
++i;
}
for(auto alias : M.aliases){
design->getNet( alias.first )->merge(design->getNet( alias.second ));
}
}
cmess2 << "BLIF file loaded" << endl;
if(model_cells.empty()){