Write a MIPS program popcount.s that accepts a single unsigned integer in hexadecimal notation as a command line argument. Your program is supposed to print out the number of set bits in that integer in decimal. Here are a few examples:

$ spim -file popcount.s 0 0

$ spim -file popcount.s 1 1

$ spim -file popcount.s 2 1

$ spim -file popcount.s 3 2

$ spim -file popcount.s 10 1

$ spim -file popcount.s ff 8

$ spim -file popcount.s ffffffff 32