ARM IRRWIW+dsb+po "Rfe DSBdRR Fre Rfe PodRW Wse" Cycle=Rfe PodRW Wse Rfe DSBdRR Fre Prefetch=0:x=F,1:x=F,1:y=T,2:y=T,3:y=F,3:x=W Com=Rf Fr Rf Ws Orig=Rfe DSBdRR Fre Rfe PodRW Wse { %x0=x; %x1=x; %y1=y; %y2=y; %y3=y; %x3=x; } P0 | P1 | P2 | P3 ; MOV R0,#2 | LDR R0,[%x1] | MOV R0,#1 | LDR R0,[%y3] ; STR R0,[%x0] | DSB | STR R0,[%y2] | MOV R1,#1 ; | LDR R1,[%y1] | | STR R1,[%x3] ; Observed 1:R0=1; 1:R1=0; 3:R0=1; x=1; and 1:R0=2; 1:R1=0; 3:R0=1; x=2;