PPC n1s (PPCNOneSync) "not exactly iriw, sync barriers" { P0:r4=x ; P0:r5=y ; P1:r4=x ; P1:r5=y ; P2:r4=x ; P2:r5=y ; P3:r4=x ; P3:r5=y ; P2:r1=1 ; P2:r2=4 ; P3:r2=2 ; P3:r1=3 ; } P0 |P1 |P2 |P3 ; lwz r1,0(r4) |lwz r1,0(r4) |stw r2,0(r5) |stw r2,0(r5) ; sync |sync |sync |sync ; lwz r2,0(r5) |lwz r2,0(r5) |stw r1,0(r4) |stw r1,0(r4) ; locations [x; y; 0:r1; 0:r2; 1:r1; 1:r2;]