PPC IRIW+lwsync+lwsyncpr+PA
"Rfe LwSyncdRR FrePA RfeAP LwSyncdRRPR FreRP"
Cycle=RfeAP LwSyncdRRPR FreRP Rfe LwSyncdRR FrePA
Prefetch=0:x=T,1:y=T,2:y=T,3:x=T
Com=Rf Fr Rf Fr
Orig=Rfe LwSyncdRR FrePA RfeAP LwSyncdRRPR FreRP
{ ok=1;
0:r2=x;
1:r2=x; 1:r4=y;
2:r2=y; 2:r4=ok;
3:r2=y; 3:r4=x;
}
P0 | P1 | P2 | P3 ;
li r1,1 | lwz r1,0(r2) | li r1,1 | lwz r1,0(r2) ;
stw r1,0(r2) | lwsync | lwarx %sta,r0,r2 | lwsync ;
| lwz r3,0(r4) | stwcx. r1,r0,r2 | lwarx r3,r0,r4 ;
| | bne Fail2 | ;
| | b Exit2 | ;
| | Fail2: | ;
| | li r3,0 | ;
| | stw r3,0(r4) | ;
| | Exit2: | ;
exists
(ok=1 /\ 1:r1=1 /\ 1:r3=0 /\ 3:r1=1 /\ 3:r3=0)