PPC safe396 "LwSyncsWW Rfe SyncdRR Fre SyncdWR Fre" Cycle=LwSyncsWW Rfe SyncdRR Fre SyncdWR Fre Relax= Safe=Fre SyncdWR LwSyncsWW ACSyncdRR { 0:r2=y; 0:r4=x; 1:r2=x; 1:r4=y; 2:r2=y; } P0 | P1 | P2 ; lwz r1,0(r2) | li r1,1 | li r1,1 ; sync | stw r1,0(r2) | stw r1,0(r2) ; lwz r3,0(r4) | sync | lwsync ; | lwz r3,0(r4) | li r3,2 ; | | stw r3,0(r2) ; exists (y=2 /\ 0:r1=2 /\ 0:r3=0 /\ 1:r3=0)