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x in index values leads to 0.

This commit is contained in:
steve 2002-08-18 01:05:50 +00:00
parent c794aa02b8
commit ac21d96bd8
1 changed files with 18 additions and 2 deletions
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20
vvp/vthread.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: vthread.cc,v 1.79 2002/08/12 01:35:09 steve Exp $"
#ident "$Id: vthread.cc,v 1.80 2002/08/18 01:05:50 steve Exp $"
#endif
# include "vthread.h"
@ -1228,13 +1228,26 @@ bool of_IX_LOAD(vthread_t thr, vvp_code_t cp)
return true;
}
/*
* Load a vector into an index register. The format of the
* opcode is:
*
* %ix/get <ix>, <base>, <wid>
*
* where <ix> is the index register, <base> is the base of the
* vector and <wid> is the width in bits.
*
* Index registers only hold binary values, so if any of the
* bits of the vector are x or z, then set the value to 0
* and give up.
*/
bool of_IX_GET(vthread_t thr, vvp_code_t cp)
{
unsigned long v = 0;
for (unsigned i = 0; i<cp->number; i++) {
unsigned char vv = thr_get_bit(thr, cp->bit_idx[1] + i);
if (vv&2) {
v = ~0UL;
v = 0UL;
break;
}
v |= vv << i;
@ -2208,6 +2221,9 @@ bool of_CALL_UFUNC(vthread_t thr, vvp_code_t cp)
/*
* $Log: vthread.cc,v $
* Revision 1.80 2002/08/18 01:05:50 steve
* x in index values leads to 0.
*
* Revision 1.79 2002/08/12 01:35:09 steve
* conditional ident string using autoconfig.
*