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<html><!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN">
<html>
<head>
<title>80386 Programmer's Reference Manual -- Opcode CMC</title>
</head>
<body>
<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>
<b>prev:</b><a href="CLTS.HTM" tppabs="http://webster.cs.ucr.edu/Page_TechDocs/Doc386/CLTS.HTM"> CLTS Clear Task-Switched Flag in CR0</a><br>
<b>next:</b><a href="CMP.HTM" tppabs="http://webster.cs.ucr.edu/Page_TechDocs/Doc386/CMP.HTM"> CMP Compare Two Operands</a>
<p>
<hr>
<p>
<h1>CMC -- Complement Carry Flag</h1>
<pre>
Opcode Instruction Clocks Description
F5 CMC 2 Complement carry flag
</pre>
<h2>Operation</h2>
<pre>
CF := NOT CF;
</pre>
<h2>Description</h2>
CMC reverses the setting of the carry flag. No other flags are affected.
<h2>Flags Affected</h2>
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" tppabs="http://webster.cs.ucr.edu/Page_TechDocs/Doc386/C17.HTM">Chapter 17 -- 80386 Instruction Set</a><br>
<b>prev:</b><a href="CLTS.HTM" tppabs="http://webster.cs.ucr.edu/Page_TechDocs/Doc386/CLTS.HTM"> CLTS Clear Task-Switched Flag in CR0</a><br>
<b>next:</b><a href="CMP.HTM" tppabs="http://webster.cs.ucr.edu/Page_TechDocs/Doc386/CMP.HTM"> CMP Compare Two Operands</a>
</body>