CS 321 - Lab 3

Lab 3 - MIPS Function Calls

The purpose of this lab is to write an assembly program that implements a simple function call. I have provided an example program, fact.s, that is based on the example printed in Appendix A of the book. You can copy these files over to your current directory, compile and run them using:

cp /usr/users/mdanfor/public_html/cs321-w07/code/fact/* .
sde-make
sde-run factram

The factorial assembly program is equivalent to the following C program:

int main() 
{
  printf("The factorial of 10 is %d\n", fact(10));
}
int fact(int n) 
{
  if(n < 1) return 1;
  else return n * fact(n-1);
}

Assignment

Create a program called sumfunc.s that is equivalent to the following C program:

int main()
{
  printf("The sum of %d and %d is %d\n", 3, 5, sum(3, 5));
}
int sum(int a, int b)
{
  return a + b;
}

You MUST do the summation in a function call, not in main as with last week's lab assignment. Email me your completed sumfunc.s file.