code: def compare(self, operand1, operand2):
          
          typ = self.symtab.get_type(operand1)
          self.free_if_register(operand1)
          self.free_if_register(operand2)
          self.newline_text("CMP{0}\t{1},{2}".format(self.OPSIGNS[typ], self.symbol(operand1), self.symbol(operand2)), True)
docs: Generates a compare instruction
             operandX - index in symbol table