xfnw/plan9fox
1
0
Fork 0
Code Issues Pull requests Projects Releases Wiki Activity

realemu: fix REP prefix condition

Browse source
This commit is contained in:
cinap_lenrek 2012-10-25 06:55:41 +02:00
parent e63f13a8de
commit da759a7fce
1 changed files with 3 additions and 3 deletions
Download patch file Download diff file Expand all files Collapse all files

6
sys/src/cmd/aux/realemu/xec.c
View file

@ -1067,7 +1067,7 @@ repcond(ulong *f, int rep)
{ {
if(rep == OREPNE) if(rep == OREPNE)
return (*f & ZF) == 0; return (*f & ZF) == 0;
return !rep || (*f & ZF) != 0; return (*f & ZF) != 0;
} }
static void static void
@ -1098,7 +1098,7 @@ opscas(Cpu *cpu, Inst *i)
d->off += n; d->off += n;
d->off &= m; d->off &= m;
c--; c--;
if(repcond(f, i->rep)) if(!repcond(f, i->rep))
break; break;
} }
aw(areg(cpu, i->alen, RDI), d->off); aw(areg(cpu, i->alen, RDI), d->off);
@ -1135,7 +1135,7 @@ opcmps(Cpu *cpu, Inst *i)
d->off += n; d->off += n;
d->off &= m; d->off &= m;
c--; c--;
if(repcond(f, i->rep)) if(!repcond(f, i->rep))
break; break;
} }
aw(areg(cpu, i->alen, RDI), d->off); aw(areg(cpu, i->alen, RDI), d->off);