Double Conditions in ARM assembly

Question

I am very new to ARM and doing an assignment for a class. What I am confused about is a double condition like, if (x > 0 && x < 100) do something.

What I

Answer 1

You can't do the comparison and branch together in one instruction like that. You need to use separate compare and branch instructions. (ARM does have a "compare and branch on zero," but that does not apply here.)

You want something more like:

    CMP r2, #100
    BGT label_out
    CMP r2, #0
    BLT label_out  

... do stuff

label_out:  ; the branches come here if R2 < 0 || R2 > 100