PPC safe298 "Rfe SyncdRW Rfe SyncdRR Fre SyncsWW Rfe DpdW Wsi" Cycle=Rfe SyncdRW Rfe SyncdRR Fre SyncsWW Rfe DpdW Wsi Relax= Safe=Fre Wsi DpdW ACSyncdRW ACSyncdRR BCSyncsWW { 0:r2=z; 0:r4=x; 1:r2=x; 1:r4=y; 2:r2=y; 3:r2=y; 3:r5=z; } P0 | P1 | P2 | P3 ; lwz r1,0(r2) | lwz r1,0(r2) | li r1,1 | lwz r1,0(r2) ; sync | sync | stw r1,0(r2) | xor r3,r1,r1 ; li r3,1 | lwz r3,0(r4) | sync | li r4,1 ; stw r3,0(r4) | | li r3,2 | stwx r4,r3,r5 ; | | stw r3,0(r2) | li r6,2 ; | | | stw r6,0(r5) ; Observed 0:r1=1; 1:r1=1; 1:r3=0; 3:r1=1; y=2; z=2; and 0:r1=1; 1:r1=1; 1:r3=1; 3:r1=2; y=2; z=2;