PPC safe411 "SyncsWR Fre SyncdWW Rfe SyncsRW Rfe SyncdRR Fre" Cycle=SyncsWR Fre SyncdWW Rfe SyncsRW Rfe SyncdRR Fre Relax= Safe=Fre SyncsWR SyncdRR BCSyncsRW BCSyncdWW { 0:r2=y; 0:r4=x; 1:r2=x; 2:r2=x; 2:r4=y; 3:r2=y; } P0 | P1 | P2 | P3 ; li r1,2 | lwz r1,0(r2) | lwz r1,0(r2) | li r1,1 ; stw r1,0(r2) | sync | sync | stw r1,0(r2) ; sync | li r3,2 | lwz r3,0(r4) | sync ; li r3,1 | stw r3,0(r2) | | lwz r3,0(r2) ; stw r3,0(r4) | | | ; exists (x=2 /\ y=2 /\ 1:r1=1 /\ 2:r1=2 /\ 2:r3=0 /\ 3:r3=1)