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Catch division by zero in .arith/div.

This commit is contained in:
steve 2001-10-16 03:06:18 +00:00
parent 36e1eab3f4
commit 0164ad78be
1 changed files with 11 additions and 1 deletions
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12
vvp/arith.cc
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@ -17,12 +17,13 @@
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
*/ */
#if !defined(WINNT) #if !defined(WINNT)
#ident "$Id: arith.cc,v 1.14 2001/10/16 02:47:37 steve Exp $" #ident "$Id: arith.cc,v 1.15 2001/10/16 03:06:18 steve Exp $"
#endif #endif
# include "arith.h" # include "arith.h"
# include "schedule.h" # include "schedule.h"
# include <limits.h> # include <limits.h>
# include <stdio.h>
# include <assert.h> # include <assert.h>
@ -76,6 +77,11 @@ void vvp_arith_div::set(vvp_ipoint_t i, functor_t f, bool push)
} }
if (b == 0) {
output_x_(push);
return;
}
unsigned long sum = a / b; unsigned long sum = a / b;
for (unsigned idx = 0 ; idx < wid_ ; idx += 1) { for (unsigned idx = 0 ; idx < wid_ ; idx += 1) {
@ -117,6 +123,7 @@ if(wid_ <= 8*sizeof(unsigned long)) {
unsigned ival = obj->ival; unsigned ival = obj->ival;
if (ival & 0xaa) { if (ival & 0xaa) {
fprintf(stderr, "Division by 0 error: returning X value\n");
output_x_(push); output_x_(push);
return; return;
} }
@ -626,6 +633,9 @@ void vvp_shiftr::set(vvp_ipoint_t i, functor_t f, bool push)
/* /*
* $Log: arith.cc,v $ * $Log: arith.cc,v $
* Revision 1.15 2001/10/16 03:06:18 steve
* Catch division by zero in .arith/div.
*
* Revision 1.14 2001/10/16 02:47:37 steve * Revision 1.14 2001/10/16 02:47:37 steve
* Add arith/div object. * Add arith/div object.
* *