Test o5ls

PPC o5ls (PPCOFiveLwSyncSync)
"Penta test: ST ; ST || LD ; LD"
{
 0:r1=1; 0:r4=x; 0:r5=y; 1:r4=x; 1:r5=y;
 2:r2=2; 2:r5=y;
}

P0           |P1           |P2           ;
stw r1,0(r4) |lwz r1,0(r5) |stw r2,0(r5) ;
lwsync       |sync         |             ;
stw r1,0(r5) |lwz r2,0(r4) |             ;
Observed
    1:r1=2; 1:r2=0; y=2;