Comp_Org_Project/code.asm at main · Mikito-Coder/Comp_Org_Project · GitHub

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.data
    prompt: .asciiz "Please enter an integer: "
    output: .asciiz "\nYou typed the number "
    illegal: .asciiz "illegal Number!\n"
    newline: .asciiz "\n"
.text
main:
    li $v0, 4          # syscall: print_str
    la $a0, prompt     # load the address of the prompt string
    syscall            # make the system call to print the prompt

    li $v0, 5
    syscall
    move $t0, $v0

    while:
        bgt $t0, 24, exit

        li $v0, 4
        la $a0, illegal
        syscall

	li $v0, 4
        la $a0, prompt
        syscall

        li $v0, 5
        syscall
        move $t0, $v0

        j while

     exit:
        move $a0, $v0
        jal fib
        move $a1, $v0

	li $v0, 4
        la $a0, output
        syscall

	li $v0, 1
        move $a0, $t0
        syscall

     li $v0, 10
     syscall


fib:
    li $t0, 1 #fn
    li $t1, 1 #fn1
    li $t2, 2 #fn2
    move $t3, $a0 #takes the input integer from prompt and moves it to $
    sub $t4, $t3, 2 #subtracts 2 from the value in $t3 and place it in $t4
    li $v0,1
    li $t5, 0 #counter starts at 0

    beq $t3, 0, done #condition to check if n== 0
    bne $t3, 1, else #condition to check n!=1

else: #if n!=1
    li $v0,1
    move $a0, $t0 #print fn == 0
    syscall
    li $v0, 4
    la $a0, newline #print newline
    syscall
    li $v0,1
    move $a0, $t1 #print fn1 == 1
    syscall
    li $v0, 4
    la $a0, newline #print newline
    syscall
    li $v0,1
    move $a0, $t2 #print fn2 == 1
    syscall
    li $v0, 4
    la $a0, newline #print newline
    syscall

loop:
    beq $t5, $t4, done # for i in range $t4, $t5 == i.
    add $t0, $t1, $t2  #fn = fn1 + fn2
    add $t1, $zero, $t2  #fn1 = fn2
    add $t2, $zero, $t0   #fn2 = fn
    li $v0,1
    move $a0, $t0   #trying to print fn
    syscall   #printing fn
    li $v0, 4
    la $a0, newline #printing newline
    syscall
    addi $t5, $t5, 1 #increase i by 1
    j loop #jump back to loop

done:
    li $v0, 10 #terminates program
    syscall