52 lines
2.4 KiB
HTML
52 lines
2.4 KiB
HTML
<html><!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN">
|
|
<html>
|
|
|
|
<head>
|
|
<title>80386 Programmer's Reference Manual -- Opcode INC</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="IN.HTM" tppabs="http://webster.cs.ucr.edu/Page_TechDocs/Doc386/IN.HTM"> IN Input from Port</a><br>
|
|
<b>next:</b><a href="INS.HTM" tppabs="http://webster.cs.ucr.edu/Page_TechDocs/Doc386/INS.HTM"> INS/INSB/INSW/INSD Input from Port to String</a>
|
|
<p>
|
|
<hr>
|
|
<p>
|
|
<h1>INC -- Increment by 1</h1>
|
|
<pre>
|
|
|
|
|
|
|
|
Opcode Instruction Clocks Description
|
|
|
|
FE /0 INC r/m8 Increment r/m byte by 1
|
|
FF /0 INC r/m16 Increment r/m word by 1
|
|
FF /6 INC r/m32 Increment r/m dword by 1
|
|
40 + rw INC r16 Increment word register by 1
|
|
40 + rd INC r32 Increment dword register by 1
|
|
</pre>
|
|
<h2>Operation</h2>
|
|
<pre>
|
|
|
|
|
|
|
|
DEST := DEST + 1;
|
|
</pre>
|
|
<h2>Description</h2>
|
|
INC adds 1 to the operand. It does not change the carry flag. To affect the carry flag, use the <a href="ADD.HTM" tppabs="http://webster.cs.ucr.edu/Page_TechDocs/Doc386/ADD.HTM">ADD</a> instruction with a second operand of 1.
|
|
<h2>Flags Affected</h2>
|
|
OF, SF, ZF, AF, and PF as described in <a href="APPC.HTM" tppabs="http://webster.cs.ucr.edu/Page_TechDocs/Doc386/APPC.HTM">Appendix C</a>
|
|
<h2>Protected Mode Exceptions</h2>
|
|
#GP(0) if the operand is in a nonwritable segment; #GP(0) for an illegal memory operand effective address in the CS, DS, ES, FS, or GS segments; #SS(0) for an illegal address in the SS segment; #PF(fault-code) for a page fault
|
|
<h2>Real Address Mode Exceptions</h2>
|
|
Interrupt 13 if any part of the operand would lie outside of the effective address space from 0 to 0FFFFH
|
|
<h2>Virtual 8086 Mode Exceptions</h2>
|
|
Same exceptions as in Real Address Mode; #PF(fault-code) for a page fault
|
|
<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="IN.HTM" tppabs="http://webster.cs.ucr.edu/Page_TechDocs/Doc386/IN.HTM"> IN Input from Port</a><br>
|
|
<b>next:</b><a href="INS.HTM" tppabs="http://webster.cs.ucr.edu/Page_TechDocs/Doc386/INS.HTM"> INS/INSB/INSW/INSD Input from Port to String</a>
|
|
</body>
|
|
|