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Redo of_SUBU in a more obvious algorithm, that 

is not significantly slower. Also, clean up the
 implementation of %mov from a constant.

 Fix initial clearing of vector by vector_to_array
This commit is contained in:
steve 2001-09-07 23:29:28 +00:00
parent acde444439
commit 0c5ce9dfec
1 changed files with 22 additions and 15 deletions
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37
vvp/vthread.cc
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@ -17,7 +17,7 @@
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
*/
#if !defined(WINNT)
#ident "$Id: vthread.cc,v 1.53 2001/08/26 22:59:32 steve Exp $"
#ident "$Id: vthread.cc,v 1.54 2001/09/07 23:29:28 steve Exp $"
#endif
# include "vthread.h"
@ -153,7 +153,7 @@ static unsigned long* vector_to_array(struct vthread_s*thr,
unsigned long*val = new unsigned long[awid];
for (unsigned idx = 0 ; idx < awid ; idx += 1)
val[0] = 0;
val[idx] = 0;
for (unsigned idx = 0 ; idx < wid ; idx += 1) {
unsigned bit = thr_get_bit(thr, addr);
@ -905,9 +905,7 @@ bool of_MOV(vthread_t thr, vvp_code_t cp)
} else {
for (unsigned idx = 0 ; idx < cp->number ; idx += 1)
thr_put_bit(thr,
cp->bit_idx1+idx,
thr_get_bit(thr, cp->bit_idx2));
thr_put_bit(thr, cp->bit_idx1+idx, cp->bit_idx2);
}
return true;
@ -1214,18 +1212,20 @@ bool of_SUB(vthread_t thr, vvp_code_t cp)
goto x_out;
unsigned long carry;
unsigned carry;
carry = 1;
for (unsigned idx = 0 ; (idx*CPU_BITS) < cp->number ; idx += 1) {
unsigned long r_inv = ~lvb[idx];
unsigned long tmp = (lva[idx] | r_inv) & TOP_BIT;
lva[idx] += r_inv + carry;
carry = (tmp > lva[idx]) ? 1 : 0;
}
for (unsigned idx = 0 ; idx < cp->number ; idx += 1) {
unsigned bit = lva[idx/CPU_BITS] >> (idx % CPU_BITS);
thr_put_bit(thr, cp->bit_idx1+idx, (bit&1) ? 1 : 0);
unsigned long tmp;
unsigned sum = carry;
tmp = lva[idx/CPU_BITS];
sum += 1 & (tmp >> (idx%CPU_BITS));
tmp = lvb[idx/CPU_BITS];
sum += 1 & ~(tmp >> (idx%CPU_BITS));
carry = sum / 2;
thr_put_bit(thr, cp->bit_idx1+idx, (sum&1) ? 1 : 0);
}
delete[]lva;
@ -1353,6 +1353,13 @@ bool of_ZOMBIE(vthread_t thr, vvp_code_t)
/*
* $Log: vthread.cc,v $
* Revision 1.54 2001/09/07 23:29:28 steve
* Redo of_SUBU in a more obvious algorithm, that
* is not significantly slower. Also, clean up the
* implementation of %mov from a constant.
*
* Fix initial clearing of vector by vector_to_array
*
* Revision 1.53 2001/08/26 22:59:32 steve
* Add the assign/x0 and set/x opcodes.
*