PPC X15 "Rfe DpCtrlIsyncdR Fre LwSyncdWW Rfe DpCtrlIsyncdR Fre LwSyncdWW" { 0:r2=a; 0:r4=x; 1:r2=x; 1:r4=y; 2:r2=y; 2:r4=z; 3:r2=z; 3:r4=a; } P0 | P1 | P2 | P3 ; lwz r1,0(r2) | li r1,1 | lwz r1,0(r2) | li r1,1 ; cmpw r1,r1 | stw r1,0(r2) | cmpw r1,r1 | stw r1,0(r2) ; beq LC00 | lwsync | beq LC01 | lwsync ; LC00: | li r3,1 | LC01: | li r3,1 ; isync | stw r3,0(r4) | isync | stw r3,0(r4) ; lwz r3,0(r4) | | lwz r3,0(r4) | ; exists (0:r1=1 /\ 0:r3=0 /\ 2:r1=1 /\ 2:r3=0)