Assembly Language Programming. Due: Description: This project will be done in pa

Question

Assembly Language Programming.

Due: Description:

This project will be done in parts that will increase in complexity. Each portion is to be submitted online separately. In the assembly file for each section you must place a pair of comments identifying yourself and the section that you are working on.

# Name: Jerry Heuring # Project 1: Section 1

Details:

Section 1:

Using the MARS or SPIM simulator develop a program that will evaluate the following expression:

3 * n + n * (n – 1) – 15
where n is stored in a data location and is set to 15. Your program should use the system calls to print the result and to exit the program.

Section 2:

Using the MARS or SPIM simulator develop a program that will implement the following conditional statement.

If ( n is even) { n = n / 2;

} else {
n = 3 * n + 1;

}
In this case, n is to be input by the user (assume they input a non-negative value), the conditional is performed, and the resulting n is to be output. Again, use the system calls for input, output, and exiting the program. Hint: There is a remainder pseudoinstruction for the MIPS architecture that you can use to determine if the value is even or odd or you can look at bit 0 to determine if the value is even or odd.

Section 3:

You are to take the conditional from the previous section and build a loop around it to find the Collatz sequence. The structure of this would be:

while (n > 1) {
If (n is even) {

n = n / 2;

} else {

n = 3 * n + 1;

}

cout << n;

}

Section 4:

You are to write a leaf subprogram that will output the following information: Your Name

Your favorite sports team

The main program should call your leaf routine and then exit using the system call.

Section 5:

Write a program with a leaf subprogram that will take two values in $a0 and $a1 and compute their greatest common divisor. The greatest common divisor should be returned in the $v0 register. The main program should input the values for $a0 and $a1 using system calls, call your subprogram, and then output the result using a system call.

Submission:

There are locations for you to submit the assignment available in BlackBoard. You need to upload only the .asm (assembly language) file. There is a different location for EACH section.

Explanation / Answer

.data
string1: .asciiz "Enter the first number: "
string2: .asciiz "Enter the second number: "
string3: .asciiz "GCD is : "

.text

#display string1
li $v0,4
la $a0,string1
syscall

#get first number
li $v0, 5
syscall
add $s0,$v0,$zero #s0 = first number

#display string2
li $v0,4
la $a0,string2
syscall

#get second number
li $v0, 5
syscall
add $s1,$v0,$zero #s1= second number

slt $t0,$s0,$s1
beq $t0,$zero,L # if first number < second number , swap or Jump directll to L
add $t1,$s0,$zero
add $s0,$s1,$zero
add $s1,$t1,$zero

L:
add $a0,$s0,$zero # put first number in $a0 as input argument
add $a1,$s1,$zero # put second number in $a1 as input argument

jal GCD

move $s3,$v0 #move gcd in $v0 to $s3

#display string3
li $v0,4
la $a0,string3
syscall

#display gcd
li $v0,1
add $a0,$s3,$zero
syscall

#end program
li $v0,10
syscall

GCD:
# a0 and a1 are the two integer parameters
# return value is in v0
move $t0, $a0
move $t1, $a1
loop:
beq $t1, $0, done
div $t0, $t1
move $t0, $t1
mfhi $t1
j loop
done:
move $v0, $t0
jr $ra

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