PPC Y07 "Rf*e DpAddrdR Fre SyncdWR Fre LwSyncdWW" { 0:r2=z; 0:r5=x; 1:r2=x; 1:r4=y; 2:r2=y; 2:r4=z; } P0 | P1 | P2 ; DIY00: | li r1,1 | li r1,1 ; lwarx r1,r0,r2 | stw r1,0(r2) | stw r1,0(r2) ; xor r3,r1,r1 | sync | lwsync ; lwzx r4,r3,r5 | lwz r3,0(r4) | li r3,1 ; stwcx. r1,r0,r2 | | stw r3,0(r4) ; bne DIY00 | | ; exists (0:r1=1 /\ 0:r4=0 /\ 1:r3=0)