PPC safe259 "LwSyncdWW Rfe SyncdRR Fre LwSyncdWW Rfe SyncdRW Wse" Cycle=LwSyncdWW Rfe SyncdRR Fre LwSyncdWW Rfe SyncdRW Wse Relax= Safe=Fre Wse LwSyncdWW ACSyncdRW ACSyncdRR { 0:r2=x; 0:r4=y; 1:r2=y; 1:r4=z; 2:r2=z; 2:r4=a; 3:r2=a; 3:r4=x; } P0 | P1 | P2 | P3 ; lwz r1,0(r2) | li r1,1 | lwz r1,0(r2) | li r1,2 ; sync | stw r1,0(r2) | sync | stw r1,0(r2) ; lwz r3,0(r4) | lwsync | li r3,1 | lwsync ; | li r3,1 | stw r3,0(r4) | li r3,1 ; | stw r3,0(r4) | | stw r3,0(r4) ; exists (a=2 /\ 0:r1=1 /\ 0:r3=0 /\ 2:r1=1)