PPC WRW+WR+lwsyncaa+sync+A
"RfeAA LwSyncdRWAA WseAP SyncdWR FrePA"
Cycle=RfeAA LwSyncdRWAA WseAP SyncdWR FrePA
Prefetch=0:x=T,1:y=W,2:y=F,2:x=T
Com=Rf Ws Fr
Orig=RfeAA LwSyncdRWAA WseAP SyncdWR FrePA
{ ok=1;
0:r2=x; 0:r4=ok;
1:r2=x; 1:r4=y; 1:r6=ok;
2:r2=y; 2:r4=x;
}
P0 | P1 | P2 ;
li r1,1 | lwarx r1,r0,r2 | li r1,2 ;
lwarx %sta,r0,r2 | stwcx. r1,r0,r2 | stw r1,0(r2) ;
stwcx. r1,r0,r2 | bne Fail1 | sync ;
bne Fail0 | lwsync | lwz r3,0(r4) ;
b Exit0 | li r3,1 | ;
Fail0: | lwarx %sta,r0,r4 | ;
li r3,0 | stwcx. r3,r0,r4 | ;
stw r3,0(r4) | bne Fail1 | ;
Exit0: | b Exit1 | ;
| Fail1: | ;
| li r5,0 | ;
| stw r5,0(r6) | ;
| Exit1: | ;
exists
(ok=1 /\ y=2 /\ 1:r1=1 /\ 2:r3=0)