PPC bb3 (BBThree) "4 proc, st/st ld/ld, lwsync/sync barriers" { P0:r5=x ; P0:r2=2 ; P1:r6=y ; P1:r1=1 ; P2:r5=x ; P2:r6=y ; P2:r1=1 ;P2:r2=2; P3:r5=x ; P3:r6=y ; } P0 |P1 |P2 |P3 ; stw r2,0(r5) |stw r1,0(r6) |stw r1,0(r5) |lwz r1,0(r6) ; | |lwsync |sync ; | |stw r2,0(r6) |lwz r2,0(r5) ; Observed 3:r1=1; 3:r2=0; x=1; y=1; and 3:r1=1; 3:r2=2; x=1; y=1; and 3:r1=1; 3:r2=0; x=2; y=1;