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