PPC safe077 "SyncdWR Fre SyncsWR Fre SyncdWW Wse" Cycle=SyncdWR Fre SyncsWR Fre SyncdWW Wse Relax= Safe=Fre Wse SyncsWR SyncdWW SyncdWR { 0:r2=x; 1:r2=x; 1:r4=y; 2:r2=y; 2:r4=x; } P0 | P1 | P2 ; li r1,1 | li r1,2 | li r1,2 ; stw r1,0(r2) | stw r1,0(r2) | stw r1,0(r2) ; sync | sync | sync ; lwz r3,0(r2) | li r3,1 | lwz r3,0(r4) ; | stw r3,0(r4) | ; exists (x=2 /\ y=2 /\ 0:r3=1 /\ 2:r3=0)