Run 2+2W+lwsync+isync in model, using ppcmem
PPC 2+2W+lwsync+isync "LwSyncdWW Wse ISyncdWW Wse" Cycle=Wse LwSyncdWW Wse ISyncdWW { 0:r2=x; 0:r4=y; 1:r2=y; 1:r4=x; } P0 | P1 ; li r1,1 | li r1,1 ; stw r1,0(r2) | stw r1,0(r2) ; lwsync | isync ; li r3,2 | li r3,2 ; stw r3,0(r4) | stw r3,0(r4) ; exists (x=1 /\ y=1)