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Handle wide conditions in ternary operator.

This commit is contained in:
steve 2000-05-26 05:26:11 +00:00
parent 0c62321402
commit e0dcdf6b72
1 changed files with 23 additions and 1 deletions
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24
elab_net.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: elab_net.cc,v 1.37 2000/05/16 04:05:15 steve Exp $"
#ident "$Id: elab_net.cc,v 1.38 2000/05/26 05:26:11 steve Exp $"
#endif
# include "PExpr.h"
@ -1365,6 +1365,25 @@ NetNet* PETernary::elaborate_net(Design*des, const string&path,
width = tru_sig->pin_count();
assert(width >= tru_sig->pin_count());
/* If the expression has width, then generate a boolean result
by connecting an OR gate to calculate the truth value of
the result. */
if (expr_sig->pin_count() > 1) {
NetLogic*log = new NetLogic(des->local_symbol(path),
expr_sig->pin_count()+1,
NetLogic::OR);
for (unsigned idx = 0; idx < expr_sig->pin_count(); idx += 1)
connect(log->pin(idx+1), expr_sig->pin(idx));
NetNet*tmp = new NetTmp(scope, des->local_symbol(path));
tmp->local_flag(true);
connect(tmp->pin(0), log->pin(0));
des->add_node(log);
expr_sig = tmp;
}
assert(expr_sig->pin_count() == 1);
/* This is the width of the LPM_MUX device that I'm about to
@ -1559,6 +1578,9 @@ NetNet* PEUnary::elaborate_net(Design*des, const string&path,
/*
* $Log: elab_net.cc,v $
* Revision 1.38 2000/05/26 05:26:11 steve
* Handle wide conditions in ternary operator.
*
* Revision 1.37 2000/05/16 04:05:15 steve
* Module ports are really special PEIdent
* expressions, because a name can be used