PPC WWC+lwsyncpa+po
"Rfe LwSyncdRWPA RfeAP PodRW Wse"
Cycle=RfeAP PodRW Wse Rfe LwSyncdRWPA
Prefetch=0:x=F,2:x=W
Com=Rf Rf Ws
Orig=Rfe LwSyncdRWPA RfeAP PodRW Wse
{ ok=1;
0:r2=x;
1:r2=x; 1:r4=y; 1:r6=ok;
2:r2=y; 2:r4=x;
}
P0 | P1 | P2 ;
li r1,2 | lwz r1,0(r2) | lwz r1,0(r2) ;
stw r1,0(r2) | lwsync | li r3,1 ;
| li r3,1 | stw r3,0(r4) ;
| lwarx %sta,r0,r4 | ;
| stwcx. r3,r0,r4 | ;
| bne Fail1 | ;
| b Exit1 | ;
| Fail1: | ;
| li r5,0 | ;
| stw r5,0(r6) | ;
| Exit1: | ;
exists
(ok=1 /\ x=2 /\ 1:r1=2 /\ 2:r1=1)