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