PPC MP+lwsync+addr
"LwSyncdWW Rfe DpAddrdR Fre"
Cycle=Rfe DpAddrdR Fre LwSyncdWW
{
0:r2=x; 0:r4=y;
1:r2=y; 1:r5=x; 1:r6=2;
}
 P0           | P1            ;
 li r1,1      | lwz r1,0(r2)  ;
 stw r1,0(r2) | cmpwi r1,1    ;
 lwsync       | bne SHORT     ;
 li r3,1      | lwz r4,0(r5)  ;
 stw r3,0(r4) | SHORT:        ;
exists
(1:r1=1 /\ 1:r4=0)
