#Robert Opalenik
#Student Lab 3

.data

#In Lab
lstk:	.asciiz "Loading stack\n"
ldstk:	.asciiz "Loaded stack\n"
ustk:   .asciiz "Unloading stack: \n"
rtrn:	.asciiz "\n"
ulstk:  .asciiz "Stack unloaded\n\n\n"

#Homework

inputa:	.asciiz "Input A: "
inputb: .asciiz "Input B: "
soln:	.asciiz "aa - ab + 8a - 10b + 19 = "

.text 

main:

#In Lab

li $v0, 4		#load print strings code
la $a0, lstk		#load string
syscall			#print

addi $t0, $zero, 1	#i = 1

loopstart:		
subu $sp, $sp, 4	#increment stack pointer
sw $t0, ($sp)		#store i to stack
addi $t0, $t0, 1	#i++
blt $t0, 11, loopstart	#loop if i < 11

li $v0, 4		#load print strings code
la $a0, ldstk		#load string
syscall			#print
li $v0, 4		#load print strings code
la $a0, ustk		#load string
syscall			#print

addi $t0, $zero, 1	#i = 1

loop2start:		
lw $t1, ($sp)		#pop to k
addu $sp, $sp, 4	#decrement stack pointer
li $v0, 1		#load int printer
move $a0, $t1		#a0 = k
syscall			#print
li $v0, 4		#load print strings code
la $a0, rtrn		#load string
syscall			#print
addi $t0, $t0, 1	#increment i
blt $t0, 11, loop2start	#branch if i < 11

li $v0, 4		#load print strings code
la $a0, ulstk		#load string
syscall			#print

#Homework

#[($sp)b][(4)a][(8)ans]
subu $sp, $sp, -12	#move stack pointer
sw $zero, 8($sp)

li $v0, 4		#load print strings code
la $a0, inputa		#load string
syscall			#print

li $v0, 5		#load int reader
syscall			#read int
sw $v0,4($sp)           #store contents of $t0 at ($sp)

li $v0, 4		#load print strings code
la $a0, inputb		#load string
syscall			#print

li $v0, 5		#load int reader
syscall			#read int
sw $v0,($sp)            #store contents of $t0 at ($sp)


lw $t0, 4($sp)		#t0 = a
lw $t1, 4($sp)		#t1 = a
mult $t0, $t1		#hilo = aa
mfhi $t1		
mflo $t0		#t0 = aa
lw $t1, 8($sp)		#t1 = new ans
add $t1, $t0, $t1	#t1 = ans + new ans
sw $t1, 8($sp)		#ans = new ans
			
lw $t0, 4($sp)		#t0 = a
lw $t1, ($sp)		#t1 = b
mult $t0, $t1		#hilo = ab
mfhi $t1		
mflo $t0		#t0 = ab
addi $t1, $zero, -1	#t1 = -1
mult $t0, $t1		#hilo = -ab
mfhi $t1		
mflo $t0		#t0 = -ab
lw $t1, 8($sp)		#t1 = new ans
add $t1, $t0, $t1	#t1 = ans + new ans
sw $t1, 8($sp)		#ans = new ans
			
lw $t0, 4($sp)		#t0 = a
addi $t1, $zero, 8	#t1 = 8
mult $t0, $t1		#hilo = 8a
mfhi $t1		
mflo $t0		#t0 = 8a
lw $t1, 8($sp)		#t1 = new ans
add $t1, $t0, $t1	#t1 = ans + new ans
sw $t1, 8($sp)		#ans = new ans
			
lw $t0, ($sp)		#t0 = b
addi $t1, $zero, 10	#t1 = 10
mult $t0, $t1		#hilo = 10b
mfhi $t1		
mflo $t0		#t0 = 10b
addi $t1, $zero, -1	#t1 = -1
mult $t0, $t1		#hilo = -10b
mfhi $t1		
mflo $t0		#t0 = -ab
lw $t1, 8($sp)		#t1 = new ans
add $t1, $t0, $t1	#t1 = ans + new ans

addi $t1, $t1, 19	#t1 = 19 + new ans = final

li $v0, 4		#load print strings code
la $a0, soln		#load string
syscall			#print
li $v0, 1		#load int printer
move $a0, $t1		#a0 = k
syscall			#print
addu $sp,$sp,12		#Return stack pointer