PPC safe478 "SyncdWW Rfe SyncdRW Rfe LwSyncsRR Fre" Cycle=SyncdWW Rfe SyncdRW Rfe LwSyncsRR Fre Relax= Safe=Fre LwSyncsRR BCSyncdWW BCSyncdRW { 0:r2=x; 0:r4=y; 1:r2=y; 2:r2=y; 2:r4=x; } P0 | P1 | P2 ; lwz r1,0(r2) | lwz r1,0(r2) | li r1,2 ; sync | lwsync | stw r1,0(r2) ; li r3,1 | lwz r3,0(r2) | sync ; stw r3,0(r4) | | li r3,1 ; | | stw r3,0(r4) ; exists (y=2 /\ 0:r1=1 /\ 1:r1=1 /\ 1:r3=1)