How PC behaves?

[Limiter]

Okay, I have used branching instruction quite a few times especially in HC-12 assmebly. But then I noticed that some branching instruction needs the user to type in the displacement value, for example.

"Made up code, just to explain, not any real assembly."

ldaa m
ldab n

loop:

beq "displ"     ;needs a displ value to jump to quit if beq satisfy
mul
staa
deca

blt "displ"     ;needs a displ value to jump bacjk to loop if blt satisfy

quit:

out b
stop

So how do I determine the displ needed to add onto the Program counter to needed to perform the above jumps. I know the code above is not complete, nor is it meant to be.

I just want to understand how the displacement performs with the Program Counter.