PPC safe178 "Rfe SyncdRW Rfe SyncsRR Fre LwSyncdWW Wse" Cycle=Rfe SyncdRW Rfe SyncsRR Fre LwSyncdWW Wse Relax= Safe=Fre Wse LwSyncdWW ACSyncsRR ACSyncdRW { 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) | lwz r1,0(r2) | li r1,2 | li r1,2 ; sync | sync | stw r1,0(r2) | stw r1,0(r2) ; li r3,1 | lwz r3,0(r2) | lwsync | ; stw r3,0(r4) | | li r3,1 | ; | | stw r3,0(r4) | ; exists (x=2 /\ y=2 /\ 0:r1=2 /\ 1:r1=1 /\ 1:r3=1)