MIPS assembly instructions

1) What does this program do? What value does the register s1 hold once you run this program? What does s1 represent?

-----MIPS Code-----

.data # Put Global Data here N: .word 5 # loop count X: .word 2, 4, 6, 8, 10 SUM: .word 0 # location of the final sum

str: .asciiz "The sum of the array is = "

.text # Put program here

.globl main # globally define 'main'

main: lw $s0, N # load loop counter into $s0 la $t0, X # load the address of X into $t0 and $s1, $s1, $zero # clear $s1 aka temp sum

loop: lw $t1, 0($t0) # load the next value of x add $s1, $s1, $t1 # add it to the running sum addi $t0, $t0, 4 # increment to the next address addi $s0, $s0, -1 # decrement the loop counter

bne $0, $s0, loop # loop back until complete sw $s1, SUM # store the final total li $v0, 10 # syscall to exit cleanly from main only

syscall # this ends execution

.end