PPC LB+isyncpa+poap
"ISyncdRWPA RfeAA PodRWAP Rfe"
Cycle=RfeAA PodRWAP Rfe ISyncdRWPA
Prefetch=
Com=Rf Rf
Orig=ISyncdRWPA RfeAA PodRWAP Rfe
{ ok=1;
0:r2=x; 0:r4=y; 0:r6=ok;
1:r2=y; 1:r4=x; 1:r6=ok;
}
P0 | P1 ;
lwz r1,0(r2) | lwarx r1,r0,r2 ;
isync | stwcx. r1,r0,r2 ;
li r3,1 | bne Fail1 ;
lwarx %sta,r0,r4 | li r3,1 ;
stwcx. r3,r0,r4 | stw r3,0(r4) ;
bne Fail0 | b Exit1 ;
b Exit0 | Fail1: ;
Fail0: | li r5,0 ;
li r5,0 | stw r5,0(r6) ;
stw r5,0(r6) | Exit1: ;
Exit0: | ;
exists
(ok=1 /\ 0:r1=1 /\ 1:r1=1)