Run SB+isbs in model, using armmem
ARM SB+isbs "ISBdWR Fre ISBdWR Fre" Cycle=Fre ISBdWR Fre ISBdWR { %x0=x; %y0=y; %y1=y; %x1=x; } P0 | P1 ; MOV R0, #1 | MOV R0, #1 ; STR R0, [%x0] | STR R0, [%y1] ; ISB | ISB ; LDR R1, [%y0] | LDR R1, [%x1] ; exists (0:R1=0 /\ 1:R1=0)