Test LB+addrra+po

PPC LB+addrra+po
"DpAddrdWRA RfeAP PodRW RfePR"
Cycle=RfeAP PodRW RfePR DpAddrdWRA
Prefetch=
Com=Rf Rf
Orig=DpAddrdWRA RfeAP PodRW RfePR
{ ok=1;
0:r2=x; 0:r5=y; 0:r7=ok;
1:r2=y; 1:r4=x;
}
 P0               | P1           ;
 lwarx r1,r0,r2   | lwz r1,0(r2) ;
 xor r3,r1,r1     | li r3,1      ;
 li r4,1          | stw r3,0(r4) ;
 lwarx %sta,r3,r5 |              ;
 stwcx. r4,r3,r5  |              ;
 bne  Fail0       |              ;
 b   Exit0        |              ;
 Fail0:           |              ;
 li r6,0          |              ;
 stw r6,0(r7)     |              ;
 Exit0:           |              ;
exists
(ok=1 /\ 0:r1=1 /\ 1:r1=1)