#################################################################
# add.s
# addition of an array
#
#################################################################
.text
.align 2
.globl main
main:
sub $sp, $sp, 32 	# adjust stack to save variables
sw $ra, 20 ($sp)	        # index i
sw $fp, 16($sp) 	# a2 contains the sum
addu $fp, $sp, 28 	# t2 contains the constant 4
li $s0, 0

jal Fred

lw $ra,20($sp)
lw $fp,16($sp)
addiu $sp,$sp,32
j $ra

Fred: #addi $sp, $sp, -8
add $s1, $s1, $ra
sw $s1, 4($sp)
sw $s0, 0($sp)

addi $s0, $s0, 1

jal Bill

j $s1

Bill: #addi $sp, $sp, -8
add $s2, $s2, $ra
sw $s2, 8($sp)

addi $s0, $s0, 2

jal Charlie

j $s2

Charlie: add $s3, $s3, $ra
sw $s3, 12($sp)

addi $s0, $s0, 3

j $s3




loop: mul $t1, $a1, $t2 	# t1 gets i * 4
lw $a3, Nstart($t1)# a3 = N[i]
add $a2, $a2, $a3 # sum = sum + N[i]
add $a1, $a1, 1 # i = i + 1
beq $a1, $a0, STOR # go to STOR if finished
j loop
STOR: sw $a2, Result # store the sum at Result
.data
.align 2
Nstart: .word 8, 25, -5, 55, 33, 12, -78
Size: .word 7
Result: .word 0