Question

Develop an x86 assembly language program that properly executes an "x to the y power" function:

int power(int x, int y)
Compute the integer value that is x to the y power
Do not concern yourself with the possibility of overflow
You may only use only a loop structure to compute the value
Remember that the return value must be placed in the EAX register
Make sure that any registers (not EAX) used by this function are placed back to their initial states prior to exiting

Allow an end user to test this function in the following manner:

Prompt the user to enter an integer value ("Enter a value for x: ")
Allow the user to input their value
Prompt the user to enter an integer value ("Enter a value for y: ")
Allow the user to input their value
Pass the user input value to the power() function Let the function
do its work and return the correct value
Print out the result ("x to the y power is: ")

Answer 1

1. Hello, Student I hope you are doing great in lockdown.

Here is your x86 assembly language program that properly executes an "x to the y power" function:

int power(int x, int y)

still if you have any doubt then feel free to ask in comment section, I am always happy to help you.

Please upvote.

I have included some comments, so you can understand what is going in code.

.MODEL SMALL

.DATA

greet   db 13,10, "Simple Calculator: x to the y power. $"
msg1    db 13,10, 0AH,0DH,"Enter a value for x:: $"
m       db 3,4 dup(?)
msg2    db 10,13, 0AH,0DH,"Enter a value for y:: $"
n       db 3,4 dup(?)
total   db 10,13, "x to the y power is: $"


.CODE

START:

mov ax, seg greet
mov ds, ax
mov dx, offset greet
mov ah, 09h     ;Display message
int 21h 

mov ax, seg msg1
mov ds, ax
mov dx, offset msg1
mov ah, 09h
int 21h         ;Print a message

mov ah, 0ah
mov dx, offset m
int 21h         ;Get 'x' value


n_POWER:

mov ax, seg msg2
mov ds, ax
mov dx, offset msg2
mov ah, 09h
int 21h         ;Print a message

mov ah, 0ah
mov dx, offset n    ;Get 'y' value
int 21h

mov ax, m
mov n, ax
mul ax, n
mov total, n

finish:
mov ah, 09h ;Display message
int 21h

mov ax,4c00h    ;Return control to DOS
int 21h         
end start

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