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3.6: Solving Arithmetic Expressions in MIPS Assembly

  • Page ID
    27111
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    Using the MIPS arithmetic operations covered so far, a program can be created to solve equations. For example the following pseudo code program, where the user is prompted for a value of x and the program prints out the results of the equation 5x2 + 2x + 3.

    main
    {
        int x = prompt("Enter a value for x: ");
        int y = 5 * x * x + 2 * x + 3;
        print("The result is: " + y);
    }

    This program is implemented in MIPS below.

    Program 3-3: Program to calculate 5*x^2 + 2*x + 3
    
    # File:      Program3-3.asm
    # Author:    Charles Kann
    # Purpose:   To calculate the result of 5*x^ + 2*x + 3
    
    .text
    .globl main
    main:
        # Get input value, x
        addi $v0, $zero, 4
        la $a0, prompt
        syscall
        addi $v0, $zero, 5
        syscall
        move $s0, $v0
        
        # Calculate the result of 5*x*x + 2* x + 3 and store it in $s1.
        mul $t0, $s0, $s0
        mul $t0, $t0, 5
        mul $t1, $s0, 2
        add $t0, $t0, $t1
        addi $s1, $t0, 3
        
        # Print output
        addi $v0, $zero, 4    # Print result string
        la $a0, result
        syscall
        addi $v0, $zero, 1    # Print result
        move $a0, $s1
        syscall
        
        #Exit program
        addi $v0, $zero, 10
        syscall
    .data
    prompt: .asciiz "Enter a value for x: "
    result: .asciiz "The result is: "
    

    3.6: Solving Arithmetic Expressions in MIPS Assembly is shared under a CC BY 4.0 license and was authored, remixed, and/or curated by Charles W. Kann III.

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