PPC safe544 "Rfe SyncdRW Rfe SyncdRR Fre" Cycle=Rfe SyncdRW Rfe SyncdRR Fre Relax= Safe=Fre ACSyncdRW ACSyncdRR { 0:r2=y; 0:r4=x; 1:r2=x; 1:r4=y; 2:r2=y; } P0 | P1 | P2 ; lwz r1,0(r2) | lwz r1,0(r2) | li r1,1 ; sync | sync | stw r1,0(r2) ; li r3,1 | lwz r3,0(r4) | ; stw r3,0(r4) | | ; exists (0:r1=1 /\ 1:r1=1 /\ 1:r3=0)