Executions for behaviour:
"1:r1=1 ; 1:r3=0"
PPC MP "PodWW Rfe PodRR Fre" Cycle=Rfe PodRR Fre PodWW Prefetch=0:x=F,0:y=W,1:y=F,1:x=T Com=Rf Fr Orig=PodWW Rfe PodRR Fre { 0:r2=x; 0:r4=y; 1:r2=y; 1:r4=x; } P0 | P1 ; li r1,1 | lwz r1,0(r2) ; stw r1,0(r2) | lwz r3,0(r4) ; li r3,1 | ; stw r3,0(r4) | ; exists (1:r1=1 /\ 1:r3=0)