PPC posrr005 "DpdR Fre SyncdWW Rfe SyncdRW Rfe DpdR PosRR" Cycle=DpdR Fre SyncdWW Rfe SyncdRW Rfe DpdR PosRR Relax=PosRR Safe=Fre DpdR BCSyncdWW BCSyncdRW { 0:r2=x; 0:r4=y; 1:r2=y; 1:r4=z; 2:r2=z; 2:r5=a; 2:r9=x; } P0 | P1 | P2 ; li r1,1 | lwz r1,0(r2) | lwz r1,0(r2) ; stw r1,0(r2) | sync | xor r3,r1,r1 ; sync | li r3,1 | lwzx r4,r3,r5 ; li r3,1 | stw r3,0(r4) | lwz r6,0(r5) ; stw r3,0(r4) | | xor r7,r6,r6 ; | | lwzx r8,r7,r9 ; exists (1:r1=1 /\ 2:r1=1 /\ 2:r8=0)