CNode *CTerm::newaccess (int x, int y, int z, int ident, CNet *net)
throw (dup_term, bad_grab, merge_term)
{
list<CDRGrid::iterator>::iterator itNode;
CDRGrid::iterator coord;
CNode *pNode;
coord = net->_drgrid->origin;
coord.set (x, y, z);
pNode = &coord.node ();
if ((z == 0) && coord.isnodehole()) {
pNode = &coord.addnode ();
}
if (pNode->data.owner) {
// Check if the node has already been took by another terminal.
if (pNode->data.owner != net)
throw bad_grab ( pNode->data.owner->terms[pNode->getid()]->name
, net->name
, coord.x()
, coord.y()
, coord.z()
, 0
, pNode->data.pri
, pNode->terminal()
, pNode->data.ident
);
// Check if the node belongs to another terminal of this net.
// If so, send a merging exception to CNet::newaccess ().
if (pNode->getid () != ident) throw merge_term ( pNode->getid()
, pNode->data.owner->terms[pNode->getid()]->name
, pNode->data.owner->terms[ident]->name
, net->name
, coord.x()
, coord.y()
, coord.z()
);
return (NULL);
}
// Check if the node is already in the list (this should never appens !)
for (itNode = nodes.begin (); itNode != nodes.end (); itNode++) {
if (*itNode == coord) {
throw dup_term (name, *itNode);
}
}
pNode->data.owner = net;
pNode->data.obstacle = false;
pNode->setid (ident);
nodes.push_back (coord);
return (pNode);
}
void CTerm::lockalone (bool global)
{
CDRGrid::iterator coord;
CDRGrid::iterator coord2;
int z, i;
bool adjust;
if (nodes.size() != 1) return;
coord = nodes.back ();
coord2 = coord;
CDRGrid* drgrid = coord._drgrid;
if ( (coord.z() > 0) && !global ) return;
if ( coord.onAB()) return;
//cerr << "+ locking lone terminal : " << coord.node().data.owner->name
// << " at " << coord
// << endl;
// All terminal case, eat up z=1 (ALU2) if not already took.
if (coord.z() == 0) {
// Go to z=1 (ALU2).
//cerr << "+ locking z=1 " << coord << endl;
newaccess ( coord.x()
, coord.y()
, 1
, coord.node().getid()
, coord.node().data.owner
);
coord2.top();
}
if (!global) return;
if (coord.z() < 2) {
// Go to z=2 (ALU3).
//cerr << "+ locking z=2 " << coord2 << endl;
newaccess ( coord2.x()
, coord2.y()
, 2
, coord.node().getid()
, coord.node().data.owner
);
}
if ( drgrid->Z < 3 ) return;
// Global terminal : when zupper=4, find the nearest VIA on the
// double pitch grid.
// Is the terminal in ALU3 (or less).
if ( (coord.z() < 3) && (coord.zupper () == 4) ) {
if ( coord2.y() % 2 ) {
// We are not on the double pitch grid. Try to go there.
// Look for up and down grid node.
adjust = true;
for (i = 0; i < 3; i++) {
switch (i) {
case 0: coord2.dy (+1); break;
case 1: coord2.dy (-2); break;
}
// Neither node are accessibles, we are probably doomed ...
if (i == 2) { coord2.dy (+1); adjust = false; break; }
if (coord2.inside()) {
if ( !coord2.node().data.obstacle
&& ( (coord2.node().data.owner == NULL )
|| (coord2.node().data.owner == coord.node().data.owner) ) )
{ break; }
}
}
if (adjust) {
// Adjust to the double grid pitch to z=2 (ALU3).
//cerr << "+ locking z=2 (ADJUST) " << coord2 << endl;
newaccess ( coord2.x()
, coord2.y()
, 2
, coord.node().getid()
, coord.node().data.owner
);
}
}
}
if ( drgrid->Z < 4 ) return;
if (coord.z() < 4) {
// Go to z=3 (ALU3).
//cerr << "+ locking z=3 " << coord2 << endl;
newaccess ( coord2.x()
, coord2.y()
, 3
, coord.node().getid()
, coord.node().data.owner
);
}
}
