# h2.1

                    .data
promptx:  .asciiz           "\nEnter x = "
prompty:  .asciiz           "Enter y = "
errort:     .asciiz         "Please enter an integer between 0 and 255."
finish:     .asciiz         "Product = "
                    .globl          main
                    .text

main:
                li        $v0, 4                    # system call code for Print String
        la        $a0, promptx              # load address of prompt into $a0
        syscall                             # print the prompt message
        li        $v0, 5                            # system call code for Read Integer
        syscall                                             # read N into $v0
        add             $t0, $v0, $zero         # store $v0 in $t0
        slti            $t9, $t0, 0                 # if $t0 is less than 0, re-run main
        bne             $t9, $zero, error
        slti            $t9, $t0, 256               # if $t0 is greater than 255, re-run main
        beq             $t9, $zero, error

main2:
        li        $v0, 4                    # System call code for Print String
        la        $a0, prompty              # load address of prompt into $a0
        syscall                             # Print the prompt message
        li        $v0, 5                            # System call code for Read Integer
        syscall                                             # Read N into $v0
        add             $t1, $v0, $zero         # Store $v0 in $t1
        slti            $t9, $t1, 0                 # if $t0 is less than 0, re-run main
        bne             $t9, $zero, error
        slti            $t9, $t1, 256               # if $t0 is greater than 255, re-run main
        beq             $t9, $zero, error

main3:
                li              $t9, 0                          # use $t9 as counter - set to 0
                li              $t8, 0                          # running total - set to 0
                beq             $t1, $zero, end         # if either multiplier is 0, skip to end
                beq             $t0, $zero, end
                b                   times

times:                                                              # increment using the first value as added value, second value as iteration amount
                add             $t8, $t8, $t0               # add $t0 to $t8
                addi            $t9, $t9, 1                 # add 1 to $t9
                bne             $t1, $t9, times         # compare $t1 and $t9 and repeat until equal

end:
                li        $v0, 4                    # system call code for Print String
        la        $a0, finish                   # load address of prompt into $a0
        syscall                             # print the prompt message
          li                $v0, 1                  # system call code for Print Integer
                move            $a0, $t8                        # move value to be printed to $a0
        syscall                             # print current integer
        li        $v0, 10                           # System call code for terminate
        syscall                                             # return control to system

error:
                li              $v0, 4
                la              $a0, errort                 #load error message
                syscall                                             #print error message string
                b                   main