Assembly, detecting overflow register

assembly, integer-overflow, overflow, x86

Solution

`ADD` instruction sets appropriate `FLAGS` reflecting the overflow condition. There are two kinds of overflow: signed and unsigned. You have to decide what's appropriate and use `jc/jnc` for unsigned and `jo/jno` for signed.

add ax, 100
jnc noUnsignedOverflow
...
noUnsignedOverflow:

add ax, 100
jno noSignedOverflow
...
noSignedOverflow:

Problem

I have this very simple assembly code: ``` start: add ax, 100 ; if ax overflow add to bx 1 jmp start ``` but i don't know how to detect ax register overflow, can anyone help me?

Original source