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Do not truncate high bits of right shift.

This commit is contained in:
steve 2002-11-13 03:03:08 +00:00
parent c98ce4a029
commit cd7378ff3f
1 changed files with 20 additions and 4 deletions
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24
set_width.cc
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@ -17,7 +17,7 @@
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
*/
#ifdef HAVE_CVS_IDENT
#ident "$Id: set_width.cc,v 1.24 2002/11/06 02:25:13 steve Exp $"
#ident "$Id: set_width.cc,v 1.25 2002/11/13 03:03:08 steve Exp $"
#endif
# include "config.h"
@ -193,9 +193,22 @@ bool NetEBShift::set_width(unsigned w)
{
bool flag = true;
left_->set_width(w);
if (left_->expr_width() < w)
left_ = pad_to_width(left_, w);
switch (op()) {
case 'l':
left_->set_width(w);
if (left_->expr_width() < w)
left_ = pad_to_width(left_, w);
break;
case 'r':
if (left_->expr_width() < w)
left_ = pad_to_width(left_, w);
break;
default:
assert(0);
}
expr_width(left_->expr_width());
flag = expr_width() == w;
@ -357,6 +370,9 @@ bool NetEUReduce::set_width(unsigned w)
/*
* $Log: set_width.cc,v $
* Revision 1.25 2002/11/13 03:03:08 steve
* Do not truncate high bits of right shift.
*
* Revision 1.24 2002/11/06 02:25:13 steve
* No need to keep excess width from an
* unsigned constant value, if it can