Assembly Language Programming Due Description This project w

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.

Solution

Here is the code for the section 1 of the above question.

Here we evaluate the equation by dividing it into different parts or sub operation, and then evaluating them using different registers.

Code:

.data
   n: .word 15
   msg1: .asciiz \"Result of the expression 3 * n + n * (n – 1) – 15 =\"
  
.text
   lw $s0, n
  
   mul $s0, $s0, 3        # 3*n
  
   lw $s1, n
  
   sub $s1, $s1, 1         # n-1
  
   lw $s2, n
  
   mul $s2, $s2, $s1 # n*(n-1)
  
   sub $s2 ,15        # n * (n – 1) – 15
  
   addi $s0 , $s0 , $s2 # 3 * n + n * (n – 1) – 15
  
  
  
   #Printing message
   li $v0, 4
   la $a0, msg1
   syscall
  
  
   #Printing result
   li $v0, 1
   la $a0, $s2
   syscall