Test S+popa+ctrlpa

PPC S+popa+ctrlpa
"PodWWPA RfeAP DpCtrldWPA WseAP"
Cycle=RfeAP DpCtrldWPA WseAP PodWWPA
Prefetch=0:x=F,1:x=W
Com=Rf Ws
Orig=PodWWPA RfeAP DpCtrldWPA WseAP
{ ok=1;
0:r2=x; 0:r4=y; 0:r6=ok;
1:r2=y; 1:r4=x; 1:r6=ok;
}
 P0               | P1               ;
 li r1,2          | lwz r1,0(r2)     ;
 stw r1,0(r2)     | cmpw r1,r1       ;
 li r3,1          | beq  LC00        ;
 lwarx %sta,r0,r4 | LC00:            ;
 stwcx. r3,r0,r4  | li r3,1          ;
 bne  Fail0       | lwarx %sta,r0,r4 ;
 b   Exit0        | stwcx. r3,r0,r4  ;
 Fail0:           | bne  Fail1       ;
 li r5,0          | b   Exit1        ;
 stw r5,0(r6)     | Fail1:           ;
 Exit0:           | li r5,0          ;
                  | stw r5,0(r6)     ;
                  | Exit1:           ;
exists
(ok=1 /\ x=2 /\ 1:r1=1)