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Use bufz to make assignments directional.

This commit is contained in:
steve 2000-05-08 05:28:29 +00:00
parent c98e4b25b3
commit e81ce68e8c
1 changed files with 28 additions and 1 deletions
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29
elaborate.cc
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@ -17,7 +17,7 @@
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
*/
#if !defined(WINNT) && !defined(macintosh)
#ident "$Id: elaborate.cc,v 1.170 2000/05/07 21:17:21 steve Exp $"
#ident "$Id: elaborate.cc,v 1.171 2000/05/08 05:28:29 steve Exp $"
#endif
/*
@ -90,6 +90,27 @@ void PGAssign::elaborate(Design*des, const string&path) const
}
/* Handle the special case that the rval is simply an
identifier. Get the rval as a NetNet, then use NetBUFZ
objects to connect it to the l-value. This is necessary to
direct drivers. This is how I attach strengths to the
assignment operation. */
if (const PEIdent*id = dynamic_cast<const PEIdent*>(pin(1))) {
NetNet*rid = id->elaborate_net(des, path, lval->pin_count(),
0, 0, 0, Link::STRONG,
Link::STRONG);
assert(rid);
for (unsigned idx = 0 ; idx < lval->pin_count() ; idx += 1) {
NetBUFZ*dev = new NetBUFZ(des->local_symbol(path));
connect(lval->pin(idx), dev->pin(0));
connect(rid->pin(idx), dev->pin(1));
dev->pin(0).drive0(drive0);
dev->pin(0).drive1(drive1);
des->add_node(dev);
}
return;
}
/* Elaborate the r-value. Account for the initial decays,
which are going to be attached to the last gate before the
generated NetNet. */
@ -246,6 +267,9 @@ void PGBuiltin::elaborate(Design*des, const string&path) const
cur[idx]->fall_time(fall_time);
cur[idx]->decay_time(decay_time);
cur[idx]->pin(0).drive0(drive_type(strength0()));
cur[idx]->pin(0).drive1(drive_type(strength1()));
des->add_node(cur[idx]);
}
@ -2358,6 +2382,9 @@ Design* elaborate(const map<string,Module*>&modules,
/*
* $Log: elaborate.cc,v $
* Revision 1.171 2000/05/08 05:28:29 steve
* Use bufz to make assignments directional.
*
* Revision 1.170 2000/05/07 21:17:21 steve
* non-blocking assignment to a bit select.
*