PPC safe404 "SyncdWW Rfe SyncdRR Fre SyncsWW Rfe SyncdRR Fre" Cycle=SyncdWW Rfe SyncdRR Fre SyncsWW Rfe SyncdRR Fre Relax= Safe=Fre SyncdRR BCSyncsWW BCSyncdWW { 0:r2=x; 0:r4=y; 1:r2=y; 2:r2=y; 2:r4=z; 3:r2=z; 3:r4=x; } P0 | P1 | P2 | P3 ; lwz r1,0(r2) | li r1,1 | lwz r1,0(r2) | li r1,1 ; sync | stw r1,0(r2) | sync | stw r1,0(r2) ; lwz r3,0(r4) | sync | lwz r3,0(r4) | sync ; | li r3,2 | | li r3,1 ; | stw r3,0(r2) | | stw r3,0(r4) ; exists (y=2 /\ 0:r1=1 /\ 0:r3=0 /\ 2:r1=2 /\ 2:r3=0)