code: def __execute_bisz(self, instr):
          
          op0_val = self.read_operand(instr.operands[0])
  
          op2_val = 1 if op0_val == 0 else 0
  
          self.write_operand(instr.operands[2], op2_val)
  
          return None
docs: Execute BISZ instruction.