We've defined a function that rolls dice called roll, which returns a number $1-6.$

Your task is to write an ABI$-$complaint function sum$\_$dice in nios$2$ assembly that takes as a single argument the number N$,$ and calls roll N times, and returns the sum of all the returned rolls. For example, if you are given that N$=2,$ you should call roll twice. If the first roll returns $6,$ and the second returns $2,$ your function should return $8.$

The C$-$function prototype should look like unsigned int sum$\_$dice$($unsigned int N$)$; though you must write the function in assembly!