PPC safe053 "Rfe SyncdRW Wse SyncdWW Wse" Cycle=Rfe SyncdRW Wse SyncdWW Wse Relax= Safe=Wse SyncdWW ACSyncdRW { 0:r2=y; 0:r4=x; 1:r2=x; 1:r4=y; 2:r2=y; } P0 | P1 | P2 ; lwz r1,0(r2) | li r1,2 | li r1,2 ; sync | stw r1,0(r2) | stw r1,0(r2) ; li r3,1 | sync | ; stw r3,0(r4) | li r3,1 | ; | stw r3,0(r4) | ; exists (x=2 /\ y=2 /\ 0:r1=2)