PPC safe536 "SyncsWW Rfe DpdW Rfe SyncsRW Rfe SyncdRR Fre" Cycle=SyncsWW Rfe DpdW Rfe SyncsRW Rfe SyncdRR Fre Relax= Safe=Fre DpdW ACSyncsRW ACSyncdRR BCSyncsWW { 0:r2=y; 0:r5=x; 1:r2=x; 2:r2=x; 2:r4=y; 3:r2=y; } P0 | P1 | P2 | P3 ; lwz r1,0(r2) | lwz r1,0(r2) | lwz r1,0(r2) | li r1,1 ; xor r3,r1,r1 | sync | sync | stw r1,0(r2) ; li r4,1 | li r3,2 | lwz r3,0(r4) | sync ; stwx r4,r3,r5 | stw r3,0(r2) | | li r3,2 ; | | | stw r3,0(r2) ; Observed 0:r1=1; 1:r1=0; 2:r1=1; 2:r3=0; x=1; y=2; and 0:r1=1; 1:r1=0; 2:r1=1; 2:r3=0; x=2; y=2; and 0:r1=1; 1:r1=1; 2:r1=1; 2:r3=0; x=2; y=2; and 0:r1=1; 1:r1=0; 2:r1=2; 2:r3=0; x=2; y=2; and 0:r1=1; 1:r1=1; 2:r1=2; 2:r3=0; x=2; y=2;