PPC safe104 "SyncdWR Fre SyncsWW Rfe SyncdRW Wse" Cycle=SyncdWR Fre SyncsWW Rfe SyncdRW Wse Relax= Safe=Fre Wse SyncdWR SyncdRW BCSyncsWW { 0:r2=x; 1:r2=x; 1:r4=y; 2:r2=y; 2:r4=x; } P0 | P1 | P2 ; li r1,1 | lwz r1,0(r2) | li r1,2 ; stw r1,0(r2) | sync | stw r1,0(r2) ; sync | li r3,1 | sync ; li r3,2 | stw r3,0(r4) | lwz r3,0(r4) ; stw r3,0(r2) | | ; exists (x=2 /\ y=2 /\ 1:r1=2 /\ 2:r3=0)