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Fix bit padding of assign signal-to-signal

This commit is contained in:
steve 2000-09-07 01:29:44 +00:00
parent 49570b8cd9
commit 4cf75adf94
1 changed files with 39 additions and 6 deletions
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45
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 1.187 2000/09/07 00:06:53 steve Exp $"
#ident "$Id: elaborate.cc,v 1.188 2000/09/07 01:29:44 steve Exp $"
#endif
/*
@ -105,15 +105,33 @@ void PGAssign::elaborate(Design*des, const string&path) const
/* If the right hand net is the same type as the left
side net (i.e. WIRE/WIRE) then it is enough to just
connect them together. Otherwise, put a bufz between
them to carry strengths from the rval */
them to carry strengths from the rval.
if (rid->type() == lval->type())
for (unsigned idx = 0 ; idx < lval->pin_count(); idx += 1) {
While we are at it, handle the case where the r-value
is not as wide as th l-value by padding with a
constant-0. */
unsigned cnt = lval->pin_count();
if (rid->pin_count() < cnt)
cnt = rid->pin_count();
if (rid->type() == lval->type()) {
unsigned idx;
for (idx = 0 ; idx < cnt; idx += 1)
connect(lval->pin(idx), rid->pin(idx));
if (cnt < lval->pin_count()) {
verinum tmpv (0UL, lval->pin_count()-cnt);
NetConst*tmp = new NetConst(des->local_symbol(path),
tmpv);
des->add_node(tmp);
for (idx = cnt ; idx < lval->pin_count() ; idx += 1)
connect(lval->pin(idx), tmp->pin(idx-cnt));
}
else
for (unsigned idx = 0 ; idx < lval->pin_count(); idx += 1) {
} else {
unsigned idx;
for (idx = 0 ; idx < cnt ; idx += 1) {
NetBUFZ*dev = new NetBUFZ(des->local_symbol(path));
connect(lval->pin(idx), dev->pin(0));
connect(rid->pin(idx), dev->pin(1));
@ -122,6 +140,18 @@ void PGAssign::elaborate(Design*des, const string&path) const
des->add_node(dev);
}
if (cnt < lval->pin_count()) {
NetConst*dev = new NetConst(des->local_symbol(path),
verinum::V0);
des->add_node(dev);
dev->pin(0).drive0(drive0);
dev->pin(0).drive1(drive1);
for (idx = cnt ; idx < lval->pin_count() ; idx += 1)
connect(lval->pin(idx), dev->pin(0));
}
}
return;
}
@ -2400,6 +2430,9 @@ Design* elaborate(const map<string,Module*>&modules,
/*
* $Log: elaborate.cc,v $
* Revision 1.188 2000/09/07 01:29:44 steve
* Fix bit padding of assign signal-to-signal
*
* Revision 1.187 2000/09/07 00:06:53 steve
* encapsulate access to the l-value expected width.
*