Test LB+data+pora

PPC LB+data+pora
"DpDatadW RfePR PodRWRA RfeAP"
Cycle=RfeAP DpDatadW RfePR PodRWRA
Prefetch=
Com=Rf Rf
Orig=DpDatadW RfePR PodRWRA RfeAP
{ ok=1;
0:r2=x; 0:r4=y;
1:r2=y; 1:r4=x; 1:r6=ok;
}
 P0           | P1               ;
 lwz r1,0(r2) | lwarx r1,r0,r2   ;
 xor r3,r1,r1 | li r3,1          ;
 addi r3,r3,1 | lwarx %sta,r0,r4 ;
 stw r3,0(r4) | stwcx. r3,r0,r4  ;
              | bne  Fail1       ;
              | b   Exit1        ;
              | Fail1:           ;
              | li r5,0          ;
              | stw r5,0(r6)     ;
              | Exit1:           ;
exists
(ok=1 /\ 0:r1=1 /\ 1:r1=1)