PPC safe433 "SyncdWW Rfe LwSyncdRR Fre SyncsWR Fre" Cycle=SyncdWW Rfe LwSyncdRR Fre SyncsWR Fre Relax= Safe=Fre SyncsWR LwSyncdRR BCSyncdWW { 0:r2=x; 0:r4=y; 1:r2=y; 2:r2=y; 2:r4=x; } P0 | P1 | P2 ; lwz r1,0(r2) | li r1,1 | li r1,2 ; lwsync | stw r1,0(r2) | stw r1,0(r2) ; lwz r3,0(r4) | sync | sync ; | lwz r3,0(r2) | li r3,1 ; | | stw r3,0(r4) ; exists (y=2 /\ 0:r1=1 /\ 0:r3=0 /\ 1:r3=1)