Question

Write a simplified machine language program that has register $s0 loop through the numbers 0,2,4.....40?

ADDI $s0, $zero, 0
ADDI $s1, $zero, 2
ADDI $s2, $zero, 40
AGAIN: ADD $s0, $s0, $s1
BEQ $s0, $s2, DONE
J AGAIN
DONE:

Are we supposed to do it like this? If not, what did I do wrong? Please explain.

Answer 1

No, it is not wrong. There is another method where you can use only 2 registers instead of 3

ADDI $s0, $zero, 0
ADDI $s2, $zero, 40

AGAIN:
ADDI $s0, $s0, 2
BEQ $s0,$s2, DONE
J AGAIN
DONE:

Note:- If you want to perform any calculation for values 0-40 then do it before BEQ $s0,$s2,DONE. Otherwise, you will never operation for value 40 in $s0