PPC R+lwsyncap+syncpa
"LwSyncdWWAP Wse SyncdWRPA FreAA"
Cycle=FreAA LwSyncdWWAP Wse SyncdWRPA
Prefetch=0:y=W,1:y=F,1:x=T
Com=Ws Fr
Orig=LwSyncdWWAP Wse SyncdWRPA FreAA
{ 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 ;
lwarx %sta,r0,r2 | stw r1,0(r2) ;
stwcx. r1,r0,r2 | sync ;
bne Fail0 | lwarx r3,r0,r4 ;
lwsync | stwcx. r3,r0,r4 ;
li r3,1 | bne Fail1 ;
stw r3,0(r4) | 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)