65 lines
3.1 KiB
HTML
65 lines
3.1 KiB
HTML
<html><!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN">
|
|
<html>
|
|
|
|
<head>
|
|
<title>80386 Programmer's Reference Manual -- Opcode AND</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="ADD.HTM" tppabs="http://webster.cs.ucr.edu/Page_TechDocs/Doc386/ADD.HTM"> ADD Add</a><br>
|
|
<b>next:</b><a href="ARPL.HTM" tppabs="http://webster.cs.ucr.edu/Page_TechDocs/Doc386/ARPL.HTM"> ARPL Adjust RPL Field of Selector</a>
|
|
<p>
|
|
<hr>
|
|
<p>
|
|
<h1>AND -- Logical AND</h1>
|
|
<pre>
|
|
|
|
|
|
|
|
Opcode Instruction Clocks Description
|
|
|
|
24 ib AND AL,imm8 2 AND immediate byte to AL
|
|
25 iw AND AX,imm16 2 AND immediate word to AX
|
|
25 id AND EAX,imm32 2 AND immediate dword to EAX
|
|
80 /4 ib AND r/m8,imm8 2/7 AND immediate byte to r/m byte
|
|
81 /4 iw AND r/m16,imm16 2/7 AND immediate word to r/m word
|
|
81 /4 id AND r/m32,imm32 2/7 AND immediate dword to r/m dword
|
|
83 /4 ib AND r/m16,imm8 2/7 AND sign-extended immediate byte
|
|
with r/m word
|
|
83 /4 ib AND r/m32,imm8 2/7 AND sign-extended immediate byte
|
|
with r/m dword
|
|
20 /r AND r/m8,r8 2/7 AND byte register to r/m byte
|
|
21 /r AND r/m16,r16 2/7 AND word register to r/m word
|
|
21 /r AND r/m32,r32 2/7 AND dword register to r/m dword
|
|
22 /r AND r8,r/m8 2/6 AND r/m byte to byte register
|
|
23 /r AND r16,r/m16 2/6 AND r/m word to word register
|
|
23 /r AND r32,r/m32 2/6 AND r/m dword to dword register
|
|
</pre>
|
|
<h2>Operation</h2>
|
|
<pre>
|
|
|
|
|
|
|
|
DEST := DEST AND SRC;
|
|
CF := 0;
|
|
OF := 0;
|
|
</pre>
|
|
<h2>Description</h2>
|
|
Each bit of the result of the AND instruction is a 1 if both corresponding bits of the operands are 1; otherwise, it becomes a 0.
|
|
<h2>Flags Affected</h2>
|
|
CF := 0, OF := 0; PF, SF, and ZF 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 result 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="ADD.HTM" tppabs="http://webster.cs.ucr.edu/Page_TechDocs/Doc386/ADD.HTM"> ADD Add</a><br>
|
|
<b>next:</b><a href="ARPL.HTM" tppabs="http://webster.cs.ucr.edu/Page_TechDocs/Doc386/ARPL.HTM"> ARPL Adjust RPL Field of Selector</a>
|
|
</body>
|
|
|