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Be more cautios about accessing out-of-range bits.

This commit is contained in:
steve 2005-08-27 03:28:16 +00:00
parent bc489a7761
commit 73453996a9
1 changed files with 15 additions and 4 deletions
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19
vvp/vvp_net.cc
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@ -16,7 +16,7 @@
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
*/
#ident "$Id: vvp_net.cc,v 1.42 2005/08/27 02:34:43 steve Exp $"
#ident "$Id: vvp_net.cc,v 1.43 2005/08/27 03:28:16 steve Exp $"
# include "config.h"
# include "vvp_net.h"
@ -450,15 +450,23 @@ bool vvp_vector4_t::eeq(const vvp_vector4_t&that) const
if (size_ != that.size_)
return false;
if (size_ <= BITS_PER_WORD)
return bits_val_ == that.bits_val_;
if (size_ <= BITS_PER_WORD) {
unsigned long mask = (1UL << 2UL * size_) - 1;
return (bits_val_&mask) == (that.bits_val_&mask);
}
unsigned words = (size_+BITS_PER_WORD-1) / BITS_PER_WORD;
unsigned words = size_ / BITS_PER_WORD;
for (unsigned idx = 0 ; idx < words ; idx += 1) {
if (bits_ptr_[idx] != that.bits_ptr_[idx])
return false;
}
unsigned long mask = size_%BITS_PER_WORD;
if (mask > 0) {
mask = (1UL << 2UL*mask) - 1;
return (bits_ptr_[words]&mask) == (that.bits_ptr_[words]&mask);
}
return true;
}
@ -1631,6 +1639,9 @@ vvp_bit4_t compare_gtge_signed(const vvp_vector4_t&a,
/*
* $Log: vvp_net.cc,v $
* Revision 1.43 2005/08/27 03:28:16 steve
* Be more cautios about accessing out-of-range bits.
*
* Revision 1.42 2005/08/27 02:34:43 steve
* Bring threads into the vvp_vector4_t structure.
*