PPC WRW+WR+addr+syncar
"Rfe DpAddrdW WsePA SyncdWRAR FreRP"
Cycle=Rfe DpAddrdW WsePA SyncdWRAR FreRP
Prefetch=0:x=T,1:y=W,2:y=F,2:x=T
Com=Rf Ws Fr
Orig=Rfe DpAddrdW WsePA SyncdWRAR FreRP
{ ok=1;
0:r2=x;
1:r2=x; 1:r5=y;
2:r2=y; 2:r4=x; 2:r6=ok;
}
P0 | P1 | P2 ;
li r1,1 | lwz r1,0(r2) | li r1,2 ;
stw r1,0(r2) | xor r3,r1,r1 | lwarx %sta,r0,r2 ;
| li r4,1 | stwcx. r1,r0,r2 ;
| stwx r4,r3,r5 | bne Fail2 ;
| | sync ;
| | lwarx r3,r0,r4 ;
| | b Exit2 ;
| | Fail2: ;
| | li r5,0 ;
| | stw r5,0(r6) ;
| | Exit2: ;
exists
(ok=1 /\ y=2 /\ 1:r1=1 /\ 2:r3=0)