Question

Can anyone help me with writing a simple example of the for loop in assembly language for this code:

for (i = -n; i < n; ++i)
{
   ...
}

where n != 0
I can’t find any example of how to write a for loop where the loop doesn’t start from 0.
So far I have this structure

mov ax, n
mov cx, n
neg cx

cmp cx, ax
JGE ENDFOR01 
DO01:
; output
LOOP DO01
ENDFOR01:

Answer 1

Consider a “long hand” way of writing it in C:

i = -n;
loop:
  if (!(i < n))
    goto end;
  ...
  ++i;
  goto loop;
end:

Hope that gives some insights!