48 lines
1.6 KiB
HTML
48 lines
1.6 KiB
HTML
<html><!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN">
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<html>
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<head>
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<title>80386 Programmer's Reference Manual -- Opcode SAHF</title>
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</head>
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<body>
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<b>up:</b> <a href="C17.HTM" tppabs="http://webster.cs.ucr.edu/Page_TechDocs/Doc386/C17.HTM">Chapter 17 -- 80386 Instruction Set</a><br>
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<b>prev:</b><a href="RET.HTM" tppabs="http://webster.cs.ucr.edu/Page_TechDocs/Doc386/RET.HTM"> RET Return from Procedure</a><br>
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<b>next:</b><a href="SAL.HTM" tppabs="http://webster.cs.ucr.edu/Page_TechDocs/Doc386/SAL.HTM"> SAL/SAR/SHL/SHR Shift Instructions</a>
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<p>
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<hr>
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<p>
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<h1>SAHF -- Store AH into Flags</h1>
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<pre>
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Opcode Instruction Clocks Description
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9E SAHF 3 Store AH into flags SF ZF xx AF xx PF xx CF
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</pre>
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<h2>Operation</h2>
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<pre>
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SF:ZF:xx:AF:xx:PF:xx:CF := AH;
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</pre>
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<h2>Description</h2>
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SAHF loads the flags listed above with values from the AH register, from bits 7, 6, 4, 2, and 0, respectively.
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<h2>Flags Affected</h2>
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SF, ZF, AF, PF, and CF as described above
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<h2>Protected Mode Exceptions</h2>
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None
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<h2>Real Address Mode Exceptions</h2>
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None
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<h2>Virtual 8086 Mode Exceptions</h2>
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None
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<p>
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<hr>
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<p><b>up:</b> <a href="C17.HTM" tppabs="http://webster.cs.ucr.edu/Page_TechDocs/Doc386/C17.HTM">Chapter 17 -- 80386 Instruction Set</a><br>
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<b>prev:</b><a href="RET.HTM" tppabs="http://webster.cs.ucr.edu/Page_TechDocs/Doc386/RET.HTM"> RET Return from Procedure</a><br>
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<b>next:</b><a href="SAL.HTM" tppabs="http://webster.cs.ucr.edu/Page_TechDocs/Doc386/SAL.HTM"> SAL/SAR/SHL/SHR Shift Instructions</a>
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</body>
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