Answer:
text
.globl main
main:
li $s0,5 #load 5 to x
li $s1,10 #load 10 to y
move $a0,$s0
move $a1,$s1 #passing argument to sum function
jal sum
add $s1,$s1,$v0 #get y + sum(x,y)
add $s1,$s1,$s0 #get x+ y + sum(x,y)
li $v0,1
move $a0,$s1
syscall #print value of y
li $v0,10 #terminate call
syscall
sum:
addi $sp, $sp, 4
subu $sp,$sp,4 # point to the place for the new item,
sw $ra,($sp) # store the contents of $ra as the new top.
move $t1, $a0 #store parameters m
move $t2, $a1 #store parameters n
add $a0,$t2,1 #get n+1
add $a1,$t1,1 #get m+1
jal sub
move $t3,$v0 #store result to t3
sub $a0,$t1,1 #get m-1
sub $a1,$t2,1 #get n-1
jal sub
move $t4,$v0 #store result to t3
add $v0,$t3,$t4 #return p+q
lw $ra,($sp) # store the contents of $ra as the new top.
addu $sp,$sp,4 # point to the place for the new item,
addi $sp, $sp, 4
jr $ra
sub:
sub $v0,$a1,$a0 #return b-a
jr $ra
Explanation:
text
.globl main
main:
li $s0,5 #load 5 to x
li $s1,10 #load 10 to y
move $a0,$s0
move $a1,$s1 #passing argument to sum function
jal sum
add $s1,$s1,$v0 #get y + sum(x,y)
add $s1,$s1,$s0 #get x+ y + sum(x,y)
li $v0,1
move $a0,$s1
syscall #print value of y
li $v0,10 #terminate call
syscall
sum:
addi $sp, $sp, 4
subu $sp,$sp,4 # point to the place for the new item,
sw $ra,($sp) # store the contents of $ra as the new top.
move $t1, $a0 #store parameters m
move $t2, $a1 #store parameters n
add $a0,$t2,1 #get n+1
add $a1,$t1,1 #get m+1
jal sub
move $t3,$v0 #store result to t3
sub $a0,$t1,1 #get m-1
sub $a1,$t2,1 #get n-1
jal sub
move $t4,$v0 #store result to t3
add $v0,$t3,$t4 #return p+q
lw $ra,($sp) # store the contents of $ra as the new top.
addu $sp,$sp,4 # point to the place for the new item,
addi $sp, $sp, 4
jr $ra
sub:
sub $v0,$a1,$a0 #return b-a
jr $ra
The above program takes in Local variables mapping: main(): x -> $s0, y -> $s1 b. sum(): p -> $s0, q -> $s1 Then Input arguments mappings: sum(): m -> $a0, n-> $a1 b. sub(): a -> $a0, b-> $a1
And return all values from a function which must be stored in V registers in ascending order.
