PPC PPC018-B "Wse PodWR Fre Rfi DpAddrdW" {0:r2=y; 0:r4=x; 1:r2=x; 1:r6=y;} P0 | P1 ; li r1,2 | li r1,1 ; stw r1,0(r2) | stw r1,0(r2) ; sync | lwz r3,0(r2) ; lwz r3,0(r4) | lwsync ; | xor r4,r3,r3 ; | li r5,1 ; | stwx r5,r4,r6 ; forall (1:r3=1 /\ (0:r3=1 /\ (y=2 \/ y=1) \/ 0:r3=0 /\ y=1))