PPC WRW+2W+syncaa+popa
"RfePA SyncdRWAA WseAP PodWWPA WseAP"
Cycle=RfePA SyncdRWAA WseAP PodWWPA WseAP
Prefetch=0:x=F,1:y=W,2:y=F,2:x=W
Com=Rf Ws Ws
Orig=RfePA SyncdRWAA WseAP PodWWPA WseAP
{ ok=1;
0:r2=x;
1:r2=x; 1:r4=y; 1:r6=ok;
2:r2=y; 2:r4=x; 2:r6=ok;
}
P0 | P1 | P2 ;
li r1,2 | lwarx r1,r0,r2 | li r1,2 ;
stw r1,0(r2) | stwcx. r1,r0,r2 | stw r1,0(r2) ;
| bne Fail1 | li r3,1 ;
| sync | lwarx %sta,r0,r4 ;
| li r3,1 | stwcx. r3,r0,r4 ;
| lwarx %sta,r0,r4 | bne Fail2 ;
| stwcx. r3,r0,r4 | b Exit2 ;
| bne Fail1 | Fail2: ;
| b Exit1 | li r5,0 ;
| Fail1: | stw r5,0(r6) ;
| li r5,0 | Exit2: ;
| stw r5,0(r6) | ;
| Exit1: | ;
exists
(ok=1 /\ x=2 /\ y=2 /\ 1:r1=2)