PPC STFW-PPC "Rfi PodRR Fre Rfi PodRR Fre" { 0:r2=x; 0:r5=y; 1:r2=y; 1:r5=x; } P0 | P1 ; li r1,1 | li r1,1 ; stw r1,0(r2) | stw r1,0(r2) ; lwz r3,0(r2) | lwz r3,0(r2) ; lwz r4,0(r5) | lwz r4,0(r5) ; exists (0:r3=1 /\ 0:r4=0 /\ 1:r3=1 /\ 1:r4=0)