PPC safe456 "LwSyncsWW Rfe SyncdRR Fre SyncsWW Rfe LwSyncdRR Fre" Cycle=LwSyncsWW Rfe SyncdRR Fre SyncsWW Rfe LwSyncdRR Fre Relax= Safe=Fre LwSyncsWW LwSyncdRR ACSyncdRR BCSyncsWW { 0:r2=y; 0:r4=x; 1:r2=x; 2:r2=x; 2:r4=y; 3:r2=y; } P0 | P1 | P2 | P3 ; lwz r1,0(r2) | li r1,1 | lwz r1,0(r2) | li r1,1 ; sync | stw r1,0(r2) | lwsync | stw r1,0(r2) ; lwz r3,0(r4) | sync | lwz r3,0(r4) | lwsync ; | li r3,2 | | li r3,2 ; | stw r3,0(r2) | | stw r3,0(r2) ; exists (x=2 /\ y=2 /\ 0:r1=2 /\ 0:r3=0 /\ 2:r1=2 /\ 2:r3=0)