Test safe390

PPC safe390
"SyncsWW Rfe DpdW Rfe SyncdRR Fre SyncdWR Fre"
Cycle=SyncsWW Rfe DpdW Rfe SyncdRR Fre SyncdWR Fre
Relax=
Safe=Fre SyncdWR DpdW ACSyncdRR BCSyncsWW
{
0:r2=z; 0:r5=x;
1:r2=x; 1:r4=y;
2:r2=y; 2:r4=z;
3:r2=z;
}
 P0            | P1           | P2           | P3           ;
 lwz r1,0(r2)  | lwz r1,0(r2) | li r1,1      | li r1,1      ;
 xor r3,r1,r1  | sync         | stw r1,0(r2) | stw r1,0(r2) ;
 li r4,1       | lwz r3,0(r4) | sync         | sync         ;
 stwx r4,r3,r5 |              | lwz r3,0(r4) | li r3,2      ;
               |              |              | stw r3,0(r2) ;
exists
(z=2 /\ 0:r1=2 /\ 1:r1=1 /\ 1:r3=0 /\ 2:r3=0)