ARM WRC+ctrl+dmb "Rfe DpCtrldW Rfe DMBdRR Fre" Cycle=Rfe DMBdRR Fre Rfe DpCtrldW { %x0=x; %x1=x; %y1=y; %y2=y; %x2=x; } P0 | P1 | P2 ; MOV R0, #1 | LDR R0, [%x1] | LDR R0, [%y2] ; STR R0, [%x0] | CMP R0, R0 | DMB ; | BNE LC00 | LDR R1, [%x2] ; | LC00: | ; | MOV R1, #1 | ; | STR R1, [%y1] | ; Observed 1:R0=1; 2:R0=1; 2:R1=0;