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<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN"><HTML><HEAD><TITLE>80386 Programmer's Reference Manual -- Opcode SAHF</TITLE></HEAD><BODY><B>up:</B> <A HREF="c17.htm">Chapter 17 -- 80386 Instruction Set</A><BR><B>prev:</B><A HREF="RET.htm"> RET Return from Procedure</A><BR><B>next:</B><A HREF="SAL.htm"> SAL/SAR/SHL/SHR Shift Instructions</A><P><HR><P><H1>SAHF -- Store AH into Flags</H1><PRE>Opcode Instruction Clocks Description9E SAHF 3 Store AH into flags SF ZF xx AF xx PF xx CF</PRE><H2>Operation</H2><PRE>SF:ZF:xx:AF:xx:PF:xx:CF := AH;</PRE><H2>Description</H2>SAHF loads the flags listed above with values from the AH register,from bits 7, 6, 4, 2, and 0, respectively.<H2>Flags Affected</H2>SF, ZF, AF, PF, and CF as described above<H2>Protected Mode Exceptions</H2>None<H2>Real Address Mode Exceptions</H2>None<H2>Virtual 8086 Mode Exceptions</H2>None<P><HR><P><B>up:</B> <A HREF="c17.htm">Chapter 17 -- 80386 Instruction Set</A><BR><B>prev:</B><A HREF="RET.htm"> RET Return from Procedure</A><BR><B>next:</B><A HREF="SAL.htm"> SAL/SAR/SHL/SHR Shift Instructions</A></BODY>⌨️ 快捷键说明
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