ARM RWC+dmb+dsb.st "Rfe DMBdRR Fre DSB.STdWR Fre" Cycle=Rfe DMBdRR Fre DSB.STdWR Fre Prefetch=0:x=T,1:x=F,1:y=T,2:y=F,2:x=T Com=Rf Fr Fr Orig=Rfe DMBdRR Fre DSB.STdWR Fre { %x0=x; %x1=x; %y1=y; %y2=y; %x2=x; } P0 | P1 | P2 ; MOV R0,#1 | LDR R0,[%x1] | MOV R0,#1 ; STR R0,[%x0] | DMB | STR R0,[%y2] ; | LDR R1,[%y1] | DSB ST ; | | LDR R1,[%x2] ; Observed 1:R0=1; 1:R1=0; 2:R1=0;