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Handle evaluation of ternary during elaboration.

This commit is contained in:
steve 1999-11-30 04:48:17 +00:00
parent 80b8ea95bb
commit 5ffac8adbf
1 changed files with 21 additions and 3 deletions
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24
eval.cc
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@ -17,7 +17,7 @@
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
*/
#if !defined(WINNT)
#ident "$Id: eval.cc,v 1.11 1999/11/28 23:42:02 steve Exp $"
#ident "$Id: eval.cc,v 1.12 1999/11/30 04:48:17 steve Exp $"
#endif
# include "PExpr.h"
@ -119,14 +119,32 @@ verinum* PENumber::eval_const(const Design*, const string&) const
return new verinum(value());
}
verinum* PETernary::eval_const(const Design*, const string&) const
verinum* PETernary::eval_const(const Design*des, const string&path) const
{
assert(0);
verinum*test = expr_->eval_const(des, path);
if (test == 0)
return 0;
verinum::V bit = test->get(0);
delete test;
switch (bit) {
case verinum::V0:
return fal_->eval_const(des, path);
case verinum::V1:
return tru_->eval_const(des, path);
default:
return 0;
// XXXX It is possible to handle this case if both fal_
// and tru_ are constant. Someday...
}
}
/*
* $Log: eval.cc,v $
* Revision 1.12 1999/11/30 04:48:17 steve
* Handle evaluation of ternary during elaboration.
*
* Revision 1.11 1999/11/28 23:42:02 steve
* NetESignal object no longer need to be NetNode
* objects. Let them keep a pointer to NetNet objects.