PPC safe506 "SyncsWW Rfe DpdR Fri Rfe SyncdRR Fre" Cycle=SyncsWW Rfe DpdR Fri Rfe SyncdRR Fre Relax= Safe=Fri Fre DpdR ACSyncdRR BCSyncsWW { 0:r2=y; 0:r5=x; 1:r2=x; 1:r4=y; 2:r2=y; } P0 | P1 | P2 ; lwz r1,0(r2) | lwz r1,0(r2) | li r1,1 ; xor r3,r1,r1 | sync | stw r1,0(r2) ; lwzx r4,r3,r5 | lwz r3,0(r4) | sync ; li r6,1 | | li r3,2 ; stw r6,0(r5) | | stw r3,0(r2) ; exists (y=2 /\ 0:r1=2 /\ 0:r4=0 /\ 1:r1=1 /\ 1:r3=0)