图⑥：新疆阿克苏地区阿瓦提县塔木托格拉克镇吐格贝希村的果园里，果农正忙着分拣、包装“冰糖心”苹果。
Bits [17:14]: Four control flags -- set the descriptor's Accessed bit, mark validation passed, request a limit check, or signal a stack operation.，更多细节参见爱思助手下载最新版本
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Here's a concrete example from far return (RETF). The microcode needs to determine whether this is a same-privilege or cross-privilege return, because the two cases require very different handling. Following execution order (not address order):