Test j1s

PPC j1s (JOneSync)
"Global rf?"
{
0:r4=x ; 0:r5=y ; 0:r2=1 ; 0:r6=z ; 0:r3=3 ;
1:r4=x ; 1:r1=1 ; 1:r2=2 ;
2:r4=x ; 2:r6=z ;
}
P0           | P1           | P2           ;
lwz r1,0(r4) | stw r1,0(r4) | lwz r1,0(r6) ;
xor r9,r1,r1 |              | xor r9,r1,r1 ;
stwx r3,r9,r6|              | lwzx r2,r9,r4 ;
sync         |              |              ;
stw r3,0(r5) |              |              ;
exists (0:r1=1 /\  2:r1=3 /\  2:r2=0)
(* locations [0:r1 ; 2:r1 ; 2:r2 ; z]*)

(* The existence shows that rf before sync should not be
   made global *)