PPC rfe005
"DpdR Fre Rfe DpdW Wse Rfe"
Cycle=DpdR Fre Rfe DpdW Wse Rfe
Relax=Rfe
Safe=Fre Wse DpdW DpdR
{
0:r2=x; 0:r5=y;
1:r2=y;
2:r2=y; 2:r5=x;
3:r2=x;
}
P0 | P1 | P2 | P3 ;
lwz r1,0(r2) | li r1,2 | lwz r1,0(r2) | li r1,1 ;
xor r3,r1,r1 | stw r1,0(r2) | xor r3,r1,r1 | stw r1,0(r2) ;
li r4,1 | | lwzx r4,r3,r5 | ;
stwx r4,r3,r5 | | | ;
exists
(y=2 /\ 0:r1=1 /\ 2:r1=2 /\ 2:r4=0)