ECE 374: Computer Organization

Set Less Than
The instruction `slt` will set $R_d$ to 1 if true, else it will set it to 0.
To do a greater than, instead of a separate instruction, you can just swap the operators and use `slt`.
To then put this into practice, you can use this to branch like with if statements. To do so, you first compute the `slt`, then branch if it is either equal or not equal to 1.

C Code:

if (x < y) {
    // Block A
} else {
    // Block B
}

MIPS ASM:

slt $t0, $s1, $s2 # Compare x and y
bne $t0, $0, ELSE # Go to Block A
# BlockB Instructions
j END
ELSE:
# BlockA Instructions
END:
# ...

sltiu rd, rs, imm

This executes as if (rs < imm) then rd = 1 else rd = 0