Test j1sv1

PPC j1sv1
"DpdW Rfe SyncdRR Fre Rfe"
(* Simplified j1s *)
{
0:r2=x; 0:r4=y;
1:r2=y;
2:r2=y; 2:r5=x;
}
 P0           | P1           | P2            ;
 lwz r1,0(r2) | li r1,1      | lwz r1,0(r2)  ;
 sync         | stw r1,0(r2) | xor r3,r1,r1  ;
 lwz r3,0(r4) |              | li r4,1       ;
              |              | stwx r4,r3,r5 ;
              |              | sync          ;
exists
(0:r1=1 /\ 0:r3=0 /\ 2:r1=1)