Test 2+2W+lwsync+popa

PPC 2+2W+lwsync+popa
"LwSyncdWW Wse PodWWPA WseAP"
Cycle=WseAP LwSyncdWW Wse PodWWPA
Prefetch=0:x=F,0:y=W,1:y=F,1:x=W
Com=Ws Ws
Orig=LwSyncdWW Wse PodWWPA WseAP
{ ok=1;
0:r2=x; 0:r4=y;
1:r2=y; 1:r4=x; 1:r6=ok;
}
 P0           | P1               ;
 li r1,2      | li r1,2          ;
 stw r1,0(r2) | stw r1,0(r2)     ;
 lwsync       | li r3,1          ;
 li 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 /\ x=2 /\ y=2)