A quick example of how to write a function with parameters in E100 assembly :)

e100_assembly_function_test

// Checks if var1 is less than var2 and stores the result in var3

        // Pass the arguments into the function
main    cp  less_than_left  var1
        cp  less_than_right var2
        
        // Call the less_than function
        call    less_than   less_than_ra
        
        // Store the return value in var3
        cp  var3    less_than_result

var1    5
var2    11
var3    0   // Expected value: 1

#include less_than

less_than

// This function takes in two parameters, left and right, and returns 1 if left is less than right, 0 if not

less_than       blt     less_than_true      less_than_left  less_than_right
                cp      less_than_result    less_than_num0
                ret     less_than_ra
less_than_true  cp      less_than_result    less_than_num1
                ret     less_than_ra
                
// Function parameters
less_than_left  0
less_than_right 0

// Return value
less_than_result    0

// Return address
less_than_ra    0

// Local variables
less_than_num0  0
less_than_num1  1