PPC ISA2+lwsync+ctrl+ctrlisync "LwSyncdWW Rfe DpCtrldW Rfe DpCtrlIsyncdR Fre" Cycle=Rfe DpCtrldW Rfe DpCtrlIsyncdR Fre LwSyncdWW { 0:r2=x; 0:r4=y; 1:r2=y; 1:r4=z; 2:r2=z; 2:r4=x; } P0 | P1 | P2 ; li r1,1 | lwz r1,0(r2) | lwz r1,0(r2) ; stw r1,0(r2) | cmpw r1,r1 | cmpw r1,r1 ; lwsync | beq LC00 | beq LC01 ; li r3,1 | LC00: | LC01: ; stw r3,0(r4) | li r3,1 | isync ; | stw r3,0(r4) | lwz r3,0(r4) ; exists (1:r1=1 /\ 2:r1=1 /\ 2:r3=0)