NEGate : Set $t1 to negation of $t2
# Negate 7. Inspect $t2: 0xFFFFFFF9 (-7). li $t0, 7 neg $t2, $t0 1 2 3
# Negate 7. Inspect $t2: 0xFFFFFFF9 (-7). li $t0, 7 neg $t2, $t0
