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<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN"><HTML><HEAD><TITLE>80386 Programmer's Reference Manual -- Opcode CLI</TITLE></HEAD><BODY><B>up:</B> <A HREF="c17.htm">Chapter 17 -- 80386 Instruction Set</A><BR><B>prev:</B><A HREF="CLD.htm"> CLD Clear Direction Flag</A><BR><B>next:</B><A HREF="CLTS.htm"> CLTS Clear Task-Switched Flag in CR0</A><P><HR><P><H1>CLI -- Clear Interrupt Flag</H1><PRE>Opcode Instruction Clocks DescriptionFA CLI 3 Clear interrupt flag; interrupts disabled</PRE><H2>Operation</H2><PRE>IF := 0;</PRE><H2>Description</H2>CLI clears the interrupt flag if the current privilege level is at least asprivileged as IOPL. No other flags are affected. External interrupts are notrecognized at the end of the CLI instruction or from that point on until theinterrupt flag is set.<H2>Flags Affected</H2>IF := 0<H2>Protected Mode Exceptions</H2>#GP(0) if the current privilege level is greater (has less privilege) thanthe IOPL in the flags register. IOPL specifies the least privileged level atwhich I/O can be performed.<H2>Real Address Mode Exceptions</H2>None<H2>Virtual 8086 Mode Exceptions</H2>#GP(0) as for Protected Mode<P><HR><P><B>up:</B> <A HREF="c17.htm">Chapter 17 -- 80386 Instruction Set</A><BR><B>prev:</B><A HREF="CLD.htm"> CLD Clear Direction Flag</A><BR><B>next:</B><A HREF="CLTS.htm"> CLTS Clear Task-Switched Flag in CR0</A></BODY>⌨️ 快捷键说明
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