Question

You are tasked to calculate a specific algebraic expansion, i.e. compute the value of f for the expression. This is similar to Project 1 Part A, but this time with floating point numbers.

f = (0.1×A×B) + (0.3×C) - (0.4×D)
Write MIPS assembly code that accepts four positive integers A, B, C, and D as input parameters. The code shall execute in MARS to prompt the user to enter four positive integers represented in decimal, each separated by the Enter key. The program shall calculate and output f as a floating-point number, using syscall for output.
HINT: For multiplying the integers A and B, you may use your own self-written multiplication loops. Then convert AxB, C, and D from the integer data format to Floating Point Data Format using appropriate instructions, and afterwards use mul.s & add.s/sub.s instructions to calculate per the algebraic expression given.
Sample output for Part B is:
Enter 4 integers for A, B, C, D respectively:
15
9
21
3
f = 18.6

Answer 1

In MIPS assembly, compute the expression f by getting integer inputs, performing integer multiplication, converting to floating-point format, and then using floating-point instructions for further calculations.

Step-by-step explanation:

To calculate the expression given by the algebraic expansion f = (0.1×A×B) + (0.3×C) - (0.4×D) in MIPS assembly language, you will need to prompt the user for four integer inputs and perform floating-point operations. First, use a multiplication loop to compute A times B as an integer. Then, convert that product, along with C and D, to floating-point format. Finally, use the MIPS floating-point instructions mul.s, add.s, and sub.s to complete the calculation as specified in the expression. Note that you will need to make syscalls to read inputs and print the floating-point result.