luke
/
iverilog
mirror of https://github.com/steveicarus/iverilog.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

Fix carry between works for %add instruction.

This commit is contained in:
steve 2001-10-23 03:49:13 +00:00
parent 859318becd
commit 2adea8de48
1 changed files with 16 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

21
vvp/vthread.cc
View File

@ -17,7 +17,7 @@
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
*/
#if !defined(WINNT)
#ident "$Id: vthread.cc,v 1.59 2001/10/20 23:20:32 steve Exp $"
#ident "$Id: vthread.cc,v 1.60 2001/10/23 03:49:13 steve Exp $"
#endif
# include "vthread.h"
@ -159,7 +159,7 @@ static unsigned long* vector_to_array(struct vthread_s*thr,
val[idx] = 0;
for (unsigned idx = 0 ; idx < wid ; idx += 1) {
unsigned bit = thr_get_bit(thr, addr);
unsigned long bit = thr_get_bit(thr, addr);
if (bit & 2)
goto x_out;
@ -348,9 +348,17 @@ bool of_ADD(vthread_t thr, vvp_code_t cp)
unsigned long carry;
carry = 0;
for (unsigned idx = 0 ; (idx*CPU_BITS) < cp->number ; idx += 1) {
unsigned long tmp = (lva[idx] | lvb[idx]) & TOP_BIT;
lva[idx] += lvb[idx] + carry;
carry = (tmp > lva[idx]) ? 1 : 0;
unsigned long tmp = lvb[idx] + carry;
unsigned long sum = lva[idx] + tmp;
carry = 0;
if (tmp < lvb[idx])
carry = 1;
if (sum < tmp)
carry = 1;
if (sum < lva[idx])
carry = 1;
lva[idx] = sum;
}
for (unsigned idx = 0 ; idx < cp->number ; idx += 1) {
@ -1665,6 +1673,9 @@ bool of_ZOMBIE(vthread_t thr, vvp_code_t)
/*
* $Log: vthread.cc,v $
* Revision 1.60 2001/10/23 03:49:13 steve
* Fix carry between works for %add instruction.
*
* Revision 1.59 2001/10/20 23:20:32 steve
* Catch and X division by 0.
*