68000 - How to I check if value in data register is odd using ANDI?

This is my code i have: I want to see whether the value in D1 is odd. If so i want to perform some operation. Can someone help me with this?

It would be nice if somone could show me an example of how to use it.

Solution

If you do a bit-wise AND of your input and a constant (immediate) value where only bit 0 is set, the result will be either 0 or 1, depending on the value of bit 1 in the input.

So:

check_odd:
    andi.b #1,d0
    beq.s  .even    ; If the result was zero, the Z flag is set, and beq jumps.
.odd:
    ; We end up here if the value was odd.
    bra.s  .done
.even:
    ; We end up here if the value was even.
.done: