PPC safe420 "SyncdWW Rfe LwSyncsRR Fre SyncdWW Rfe SyncdRR Fre" Cycle=SyncdWW Rfe LwSyncsRR Fre SyncdWW Rfe SyncdRR Fre Relax= Safe=Fre SyncdRR LwSyncsRR 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) | li r1,2 | lwz r1,0(r2) | li r1,1 ; lwsync | stw r1,0(r2) | sync | stw r1,0(r2) ; lwz r3,0(r2) | sync | lwz r3,0(r4) | sync ; | li r3,1 | | li r3,1 ; | stw r3,0(r4) | | stw r3,0(r4) ; exists (x=2 /\ 0:r1=1 /\ 0:r3=1 /\ 2:r1=1 /\ 2:r3=0)