PPC S+syncpa+isync
"SyncdWWPA RfeAP ISyncdRW Wse"
Cycle=RfeAP ISyncdRW Wse SyncdWWPA
Prefetch=0:x=F,1:x=W
Com=Rf Ws
Orig=SyncdWWPA RfeAP ISyncdRW Wse
{ ok=1;
0:r2=x; 0:r4=y; 0:r6=ok;
1:r2=y; 1:r4=x;
}
P0 | P1 ;
li r1,2 | lwz r1,0(r2) ;
stw r1,0(r2) | isync ;
sync | li r3,1 ;
li r3,1 | stw r3,0(r4) ;
lwarx %sta,r0,r4 | ;
stwcx. r3,r0,r4 | ;
bne Fail0 | ;
b Exit0 | ;
Fail0: | ;
li r5,0 | ;
stw r5,0(r6) | ;
Exit0: | ;
exists
(ok=1 /\ x=2 /\ 1:r1=1)