.data
input: .asciiz "HArDware"
output: .asciiz ""
sd: .word 0
.text
.globl start
.ent start
start:
	la $4,input // carregando a0 com endereço inicial da string
	la $11,input
	jal strlen
	add $11,$11,$8
	addi $4,$4,-1
	jal processa
	j exit

strlen:
	li $8,0 // zerando contador
	loop:
	lb $9, 0($4)
	beqz $9,sailoop
	addi $4,$4,1
	addi $8,$8,1
	j loop
	sailoop:
	jr $31

processa:
	lb $12,0($4)
	slti $15,$12,65
	bnez $15,erro
	slti $15,$12,123
	beqz $15,erro
	slti $15,$12,90
	not $15,$15
	slti $14,$12,97
	and $15,$15,$14
	bnez $15,erro
	slti $15,$12,91
	bnez $15,soma32

sub32:
	addi $12,$12,-32
	sb $12,0($11)
	addi $4,$4,-1
	addi $11,$11,1
	addi $8,$8,-1
	beqz $8,exit
	j processa


soma32:
	addi $12,$12,32
	sb $12,0($11)
	addi $4,$4,-1
	addi $11,$11,1
	addi $8,$8,-1
	beqz $8,exit
	j processa





erro:
	li $16,1
exit:
.end