Test LB+data+isyncrp

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