PPC WRC+isync+addr "Rfe ISyncdRW Rfe DpAddrdR Fre" Cycle=Rfe ISyncdRW Rfe DpAddrdR Fre { 0:r2=x; 1:r2=x; 1:r4=y; 2:r2=y; 2:r5=x; } P0 | P1 | P2 ; li r1,1 | lwz r1,0(r2) | lwz r1,0(r2) ; stw r1,0(r2) | isync | xor r3,r1,r1 ; | li r3,1 | lwzx r4,r3,r5 ; | stw r3,0(r4) | ; exists (1:r1=1 /\ 2:r1=1 /\ 2:r4=0)