PPC MP+syncpa+ctrlpr
"SyncdWWPA RfeAP DpCtrldRPR FreRP"
Cycle=RfeAP DpCtrldRPR FreRP SyncdWWPA
Prefetch=1:x=T
Com=Rf Fr
Orig=SyncdWWPA RfeAP DpCtrldRPR FreRP
{ ok=1;
0:r2=x; 0:r4=y; 0:r6=ok;
1:r2=y; 1:r4=x;
}
P0 | P1 ;
li r1,1 | lwz r1,0(r2) ;
stw r1,0(r2) | cmpw r1,r1 ;
sync | beq LC00 ;
li r3,1 | LC00: ;
lwarx %sta,r0,r4 | lwarx r3,r0,r4 ;
stwcx. r3,r0,r4 | ;
bne Fail0 | ;
b Exit0 | ;
Fail0: | ;
li r5,0 | ;
stw r5,0(r6) | ;
Exit0: | ;
exists
(ok=1 /\ 1:r1=1 /\ 1:r3=0)