Kshitij_Agarwal_hw4

#Kshitij Agarwal
#G00980156
#CS 465

.data
arrayOne: .space 1000
arrayTwo: .space 1000

.text
main:
    li $t0, 1 #keeps track of lenght of new number
    li $t1, 0 #keeps track of position
    li $t2, 0 #temp var 1
    li $t3, 0 #temp var 2
    li $t4, 1 #keeps track of which array to change
    li $t5, 0 #keeps track of carry over
    li $t6, 2 #index of number

    sb $t0, arrayOne($t1)
    sb $t0, arrayTwo($t1)

addNum:
    li $t2, 0
    li $t3, 0
    lb $t2, arrayOne($t1)
    lb $t3, arrayTwo($t1)
    add $t2, $t2, $t3
    add $t2, $t2, $t5
    li $t5, 0
    bgt  $t2, 9, carryOver
    nop
    beq $t4, 1, addArrayOne
    nop
    j addArrayTwo
    nop

carryOver:
    li $t5, 1
    sub $t2, $t2, 0xa
    beq $t4, 1, addArrayOne
    nop
    j addArrayTwo
    nop

addArrayOne:
    sb $t2, arrayOne($t1)
    add $t1, $t1, 1
    beq $t1, $t0, nextNumOne
    nop
    j addNum
    nop

addArrayTwo:
    sb $t2, arrayTwo($t1)
    add $t1, $t1, 1
    beq $t1, $t0, nextNumTwo
    nop
    j addNum
    nop

nextNumOne:
    add $t4, $t4, 1
    li $t1, 0
    add $t6, $t6, 1
    beq $t5, 1, longerOne
    nop
    j addNum
    nop

longerOne:
    sb $t5, arrayOne($t0)
    li $t5, 0
    add $t0, $t0, 1
    j check
    nop

nextNumTwo:
    sub $t4, $t4, 1
    li $t1, 0
    add $t6, $t6, 1
    beq $t5, 1, longerTwo
    nop
    j addNum
    nop

longerTwo:
    sb $t5, arrayTwo($t0)
    li $t5, 0
    add $t0, $t0, 1
    j check
    nop

check:
    blt $t0, 1000, addNum
    nop

exit:
    li $t2, 0 #temp var 1
    li $t3, 0 #temp var 2
    b .
    nop
    .end