Due the lack of sources I could get my hands on, it seemed strange to me that nobody posted a program as a solution for this question on the internet in MIPS (unless I'm that bad at surfing the internet). I require clarificatoin about whether my program can be written in a more efficient and optimized way rather than just spamming Labels&Branches!!
.data
msg : .asciiz "Give the month: "
msg1 : .asciiz "This month contains 31 Days."
msg2 : .asciiz "This month contains 30 Days."
msg3 : .asciiz "This month contains 28/29 Days."
.text
.globl main
main:
li $v0,4
la $a0,msg
syscall
li $v0,5
syscall
move $t0,$v0 #t0 contains given month
li $t7,7
li $t2,2
li $t1,0
div $t0,$t2
mfhi $t3
mflo $t4
bgt $t0,$t7,etiq3
beq $t0,$t2,etiq2
beqz $t3,etiq1
bgtz $t3,etiq
etiq:
li $v0,1
addi $a0,$s1,0
syscall
li $v0,4
la $a0,msg1
syscall
j exit
etiq1:
li $v0,1
addi $a0,$s0,0
syscall
li $v0,4
la $a0,msg2
syscall
j exit
etiq2:
li $v0,1
addi $a0,$s0,0
syscall
li $v0,4
la $a0,msg3
syscall
j exit
etiq3:
beqz $t3,etiq
bgtz $t3,etiq1
exit:
li $v0,10
syscall
Your code isn't well commented so hard to follow. Especially why you are printing $s0 and $s1 neither of which seem to be initialized.
As for an optimized solution, a possibility would be to use a bitmap (2 bits per month):
.data
msg : .asciiz "Give the month: "
msg1 : .asciiz "This month contains 31 Days."
msg2 : .asciiz "This month contains 30 Days."
msg3 : .asciiz "This month contains 28/29 Days."
table: .word msg3, msg2, msg1
.text
.globl main
main:
li $v0,4
la $a0,msg
syscall
li $v0,5
syscall
# 00 = 28/29, 01 = 30, 10 = 31
li $a0, 0x099a6620 # 1001 1001 1010 0110 0110 0010 0000
sll $v0, $v0, 1 # 2 bits per month
srlv $a0, $a0, $v0 # shift the bitmap
andi $a0, $a0, 0x0c # keep the 2 bits
lw $a0, table($a0)
li $v0,4
syscall
li $v0,10
syscall
You could of course just put the message pointers into a table with 12 entries as well for somewhat simpler code at the expense of more memory.