;; This program reads in 3 numbers a, b, and c.
;; It outputs 1 if a*b = c and outputs -1 otherwise.
;;
;; Date Written: 2008/02/13
;; Author: SS

  allocate-registers a, b, c       ; input registers
  allocate-registers prod, check   ; temporary registers
  allocate-registers else          ; label register

  read a  ; first input number
  read b  ; second input number
  read c  ; third input number

  mul prod, a, b
  seq check, prod, c
  li  else, Lelse
  jeqz check, else
  write check
  halt
Lelse:
  li check, -1
  write check
  halt