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