PPC m7l (PPCMSevenLwSync) { 0:r5=x; 1:r5=x; 1:r6=y; 2:r5=x; 2:r6=y; 0:r1=1; 2:r1=1; 3:r2=2; 3:r6=y; } P0 |P1 |P2 |P3 ; stw r1,0(r5)|lwz r1,0(r5)|stw r1,0(r6)|stw r2,0(r6); |lwsync |sync | ; |lwz r2,0(r6)|lwz r3,0(r5)| ; locations [x;y;] exists (1:r1=1 /\ 1:r2=0 /\ 2:r3=0)