PPC posrr012
"Fre SyncdWW Rfe SyncdRW Rfe SyncdRW Rfe PosRR"
Cycle=Fre SyncdWW Rfe SyncdRW Rfe SyncdRW Rfe PosRR
Relax=PosRR
Safe=Fre BCSyncdWW BCSyncdRW
{
0:r2=z; 0:r4=x;
1:r2=x; 1:r4=y;
2:r2=y; 2:r4=z;
3:r2=z;
}
P0 | P1 | P2 | P3 ;
li r1,2 | lwz r1,0(r2) | lwz r1,0(r2) | lwz r1,0(r2) ;
stw r1,0(r2) | sync | sync | lwz r3,0(r2) ;
sync | li r3,1 | li r3,1 | ;
li r3,1 | stw r3,0(r4) | stw r3,0(r4) | ;
stw r3,0(r4) | | | ;
exists
(z=2 /\ 1:r1=1 /\ 2:r1=1 /\ 3:r1=1 /\ 3:r3=1)