PPC LB+lwsyncaa+popa
"LwSyncdRWAA RfeAP PodRWPA RfeAA"
Cycle=RfeAA LwSyncdRWAA RfeAP PodRWPA
Prefetch=
Com=Rf Rf
Orig=LwSyncdRWAA RfeAP PodRWPA RfeAA
{ ok=1;
0:r2=x; 0:r4=y; 0:r6=ok;
1:r2=y; 1:r4=x; 1:r6=ok;
}
P0 | P1 ;
lwarx r1,r0,r2 | lwz r1,0(r2) ;
stwcx. r1,r0,r2 | li r3,1 ;
bne Fail0 | lwarx %sta,r0,r4 ;
lwsync | stwcx. r3,r0,r4 ;
li r3,1 | bne Fail1 ;
lwarx %sta,r0,r4 | b Exit1 ;
stwcx. r3,r0,r4 | Fail1: ;
bne Fail0 | li r5,0 ;
b Exit0 | stw r5,0(r6) ;
Fail0: | Exit1: ;
li r5,0 | ;
stw r5,0(r6) | ;
Exit0: | ;
exists
(ok=1 /\ 0:r1=1 /\ 1:r1=1)