PPC R+lwsyncpa+syncpa
"LwSyncdWWPA WseAP SyncdWRPA FreAP"
Cycle=FreAP LwSyncdWWPA WseAP SyncdWRPA
Prefetch=0:y=W,1:y=F,1:x=T
Com=Ws Fr
Orig=LwSyncdWWPA WseAP SyncdWRPA FreAP
{ ok=1;
0:r2=x; 0:r4=y; 0:r6=ok;
1:r2=y; 1:r4=x; 1:r6=ok;
}
P0 | P1 ;
li r1,1 | li r1,2 ;
stw r1,0(r2) | stw r1,0(r2) ;
lwsync | sync ;
li r3,1 | lwarx r3,r0,r4 ;
lwarx %sta,r0,r4 | stwcx. r3,r0,r4 ;
stwcx. r3,r0,r4 | bne Fail1 ;
bne Fail0 | b Exit1 ;
b Exit0 | Fail1: ;
Fail0: | li r5,0 ;
li r5,0 | stw r5,0(r6) ;
stw r5,0(r6) | Exit1: ;
Exit0: | ;
exists
(ok=1 /\ y=2 /\ 1:r3=0)