PPC safe297 "Rfe SyncdRR Fre SyncsWW Rfe DpdW Wsi" Cycle=Rfe SyncdRR Fre SyncsWW Rfe DpdW Wsi Relax= Safe=Fre Wsi DpdW ACSyncdRR BCSyncsWW { 0:r2=y; 0:r4=x; 1:r2=x; 2:r2=x; 2:r5=y; } P0 | P1 | P2 ; lwz r1,0(r2) | li r1,1 | lwz r1,0(r2) ; sync | stw r1,0(r2) | xor r3,r1,r1 ; lwz r3,0(r4) | sync | li r4,1 ; | li r3,2 | stwx r4,r3,r5 ; | stw r3,0(r2) | li r6,2 ; | | stw r6,0(r5) ; exists (x=2 /\ y=2 /\ 0:r1=2 /\ 0:r3=0 /\ 2:r1=2)