### Answer:

ori $7, $0, 146 # put +146 into $7
addiu $10,$7,-82 # add -82

The program is much shorter.

# The ` subu `

Instruction

MIPS
has two integer subtraction instructions:

subu d,s,t # d <—— s - t .
# No overflow trap.
# This is equivalent to $d <—— s + (-t)
# where (-t) is reflect-add-one of t.

sub d,s,t # d <—— s - t .
# Overflow is trapped!
# This is equivalent to $d <—— s + (-t)
# where (-t) is reflect-add-one of t.

### QUESTION 11:

When `ori $d,$0,const`

is used to load
the register `$d`

,
`const`

is 16-bit unsigned binary.
Say that you want to load `$8`

with a negative 86.
Will the following work?

addiu $8,$0,-86 # $8 <—— -86