Test R04

PPC R04
"Fre LwSyncdWW Wse SyncdWW Rfe DpAddrdR"
{
0:r2=x; 0:r4=y;
1:r2=y; 1:r4=z;
2:r2=z; 2:r5=x;
}
 P0           | P1           | P2            ;
 li r1,1      | li r1,2      | lwz r1,0(r2)  ;
 stw r1,0(r2) | stw r1,0(r2) | xor r3,r1,r1  ;
 lwsync       | sync         | lwzx r4,r3,r5 ;
 li r3,1      | li r3,1      |               ;
 stw r3,0(r4) | stw r3,0(r4) |               ;
Observed
    2:r1=1; 2:r4=0; y=2;