PPC LB+isyncpa+syncap "ISyncdRWPA RfeAA SyncdRWAP Rfe" Cycle=RfeAA SyncdRWAP Rfe ISyncdRWPA Prefetch= Com=Rf Rf Orig=ISyncdRWPA RfeAA SyncdRWAP 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 | sync ; stwcx. r3,r0,r4 | li r3,1 ; bne Fail0 | stw r3,0(r4) ; b Exit0 | b Exit1 ; Fail0: | Fail1: ; li r5,0 | li r5,0 ; stw r5,0(r6) | stw r5,0(r6) ; Exit0: | Exit1: ; exists (ok=1 /\ 0:r1=1 /\ 1:r1=1)