PPC safe397 "SyncdWW Rfe LwSyncsRW Rfe SyncdRR Fre SyncdWR Fre" Cycle=SyncdWW Rfe LwSyncsRW Rfe SyncdRR Fre SyncdWR Fre Relax= Safe=Fre SyncdWR LwSyncsRW ACSyncdRR BCSyncdWW { 0:r2=x; 1:r2=x; 1:r4=y; 2:r2=y; 2:r4=z; 3:r2=z; 3:r4=x; } P0 | P1 | P2 | P3 ; lwz r1,0(r2) | lwz r1,0(r2) | li r1,1 | li r1,1 ; lwsync | sync | stw r1,0(r2) | stw r1,0(r2) ; li r3,2 | lwz r3,0(r4) | sync | sync ; stw r3,0(r2) | | lwz r3,0(r4) | li r3,1 ; | | | stw r3,0(r4) ; exists (x=2 /\ 0:r1=1 /\ 1:r1=2 /\ 1:r3=0 /\ 2:r3=0)