Test m8l

PPC m8l  (PPCMEightLwSync)
"LD;ST || LD;ST, hexa version (d tests in @xx)"
{
P0:r4=x ; P0:r5=y ; P0:r2=1 ;
P1:r4=x ; P1:r5=y ; P1:r2=1 ;
P2:r4=x ; P3:r5=y ;
P2:r2=2 ; P3:r2=2 ;
}

P0           |P1           |P2           |P3           ;
lwz r1,0(r4) |lwz r1,0(r5) |stw r2,0(r4) |stw r2,0(r5) ;
lwsync       |lwsync       |             |             ;
stw r2,0(r5) |stw r2,0(r4) |             |             ;
locations [0:r1 ; 1:r1 ; x ; y ; ]
(*
Invalid outcome on doko!!!
(0:r1=2 /\ 1:r1=2 /\ x=2 /\ y=2)
*)