Test LB+isyncrp+lwsyncrp

PPC LB+isyncrp+lwsyncrp
"ISyncdRWRP RfePR LwSyncdRWRP RfePR"
Cycle=RfePR LwSyncdRWRP RfePR ISyncdRWRP
Prefetch=
Com=Rf Rf
Orig=ISyncdRWRP RfePR LwSyncdRWRP RfePR
{
0:r2=x; 0:r4=y;
1:r2=y; 1:r4=x;
}
 P0             | P1             ;
 lwarx r1,r0,r2 | lwarx r1,r0,r2 ;
 isync          | lwsync         ;
 li r3,1        | li r3,1        ;
 stw r3,0(r4)   | stw r3,0(r4)   ;
exists
(0:r1=1 /\ 1:r1=1)