Test safe007

PPC safe007
"SyncdWW Wse SyncdWW Rfe SyncsRW Rfe DpdW Wse"
Cycle=SyncdWW Wse SyncdWW Rfe SyncsRW Rfe DpdW Wse
Relax=
Safe=Wse SyncdWW DpdW BCSyncsRW BCSyncdWW
{
0:r2=x; 0:r4=y;
1:r2=y;
2:r2=y; 2:r5=z;
3:r2=z; 3:r4=x;
}
 P0           | P1           | P2            | P3           ;
 li r1,2      | lwz r1,0(r2) | lwz r1,0(r2)  | li r1,2      ;
 stw r1,0(r2) | sync         | xor r3,r1,r1  | stw r1,0(r2) ;
 sync         | li r3,2      | li r4,1       | sync         ;
 li r3,1      | stw r3,0(r2) | stwx r4,r3,r5 | li r3,1      ;
 stw r3,0(r4) |              |               | stw r3,0(r4) ;
Observed
    1:r1=0; 2:r1=2; x=2; y=2; z=2;