PPC ISA2+lwsync+isync+lwsync "LwSyncdWW Rfe ISyncdRW Rfe LwSyncdRR Fre" Cycle=Rfe LwSyncdRR Fre LwSyncdWW Rfe ISyncdRW { 0:r2=x; 0:r4=y; 1:r2=y; 1:r4=z; 2:r2=z; 2:r4=x; } P0 | P1 | P2 ; li r1,1 | lwz r1,0(r2) | lwz r1,0(r2) ; stw r1,0(r2) | isync | lwsync ; lwsync | li r3,1 | lwz r3,0(r4) ; li r3,1 | stw r3,0(r4) | ; stw r3,0(r4) | | ; exists (1:r1=1 /\ 2:r1=1 /\ 2:r3=0)