If greater than or equal in MIPS

Question

Prompt for and input two integers “a” and “b” using syscalls

Display one of the following statements depending on if a>b, or a=b or a

• You entered a grea

Answer 1

Why do you read the numbers into $t1 and $t2 then compare $s1 and $s0? Where is it confusing?

Simply use slt and beq/bne, that'll cover all comparison cases you need.

Suppose a is in $s0, b is in $s1

• a < b:

  slt $t0, $s0, $s1
  bne $t0, $zero, a_lt_b # $t0 == 1 != 0 if a < b
  

• a = b:

  beq $s0, $s1, a_eq_b   # nothing more to explain
  

• a > b:

  slt $t0, $s1, $s0
  bne $t0, $zero, b_lt_a # $t0 == 1 != 0 if b < a
  

• a >= b:

  slt $t0, $s0, $s1
  beq $t0, $zero, a_ge_b # $t0 == 0 if a >= b or !(a < b)
  

• a <= b:

  slt $t0, $s1, $s0
  beq $t0, $zero, b_ge_a # $t0 == 0 if b >= a or !(b < a)