MIPS: making sure the stack pointer is double-word aligned

double.asm

.data
array: .double 1.0 2.0 3.0

.text
.globl main

main:
andi $sp, 0xfffffff8
addi $sp, $sp, -24

l.d $f0, array+0
l.d $f2, array+8
l.d $f4, array+16

s.d $f0, 16($sp)
s.d $f2, 8($sp)
s.d $f4, 0($sp)

li $v0, 10
syscall  	# exit