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104 lines
5.3 KiB
HTML
104 lines
5.3 KiB
HTML
4 years ago
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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
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<html>
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<!-- This file documents the GNU Assembler "as".
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Copyright (C) 1991-2019 Free Software Foundation, Inc.
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Permission is granted to copy, distribute and/or modify this document
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under the terms of the GNU Free Documentation License, Version 1.3
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or any later version published by the Free Software Foundation;
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with no Invariant Sections, with no Front-Cover Texts, and with no
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Back-Cover Texts. A copy of the license is included in the
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section entitled "GNU Free Documentation License".
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-->
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<!-- Created by GNU Texinfo 6.4, http://www.gnu.org/software/texinfo/ -->
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<head>
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<title>s390 Syntax (Using as)</title>
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<meta name="description" content="s390 Syntax (Using as)">
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<meta name="keywords" content="s390 Syntax (Using as)">
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<meta name="Generator" content="makeinfo">
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
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<link href="index.html#Top" rel="start" title="Top">
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<link href="AS-Index.html#AS-Index" rel="index" title="AS Index">
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<link href="index.html#SEC_Contents" rel="contents" title="Table of Contents">
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<link href="S_002f390_002dDependent.html#S_002f390_002dDependent" rel="up" title="S/390-Dependent">
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<link href="s390-Register.html#s390-Register" rel="next" title="s390 Register">
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<link href="s390-Characters.html#s390-Characters" rel="prev" title="s390 Characters">
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<style type="text/css">
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</style>
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</head>
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<body lang="en">
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<a name="s390-Syntax"></a>
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<div class="header">
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<p>
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Next: <a href="s390-Directives.html#s390-Directives" accesskey="n" rel="next">s390 Directives</a>, Previous: <a href="s390-Characters.html#s390-Characters" accesskey="p" rel="prev">s390 Characters</a>, Up: <a href="S_002f390_002dDependent.html#S_002f390_002dDependent" accesskey="u" rel="up">S/390-Dependent</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="AS-Index.html#AS-Index" title="Index" rel="index">Index</a>]</p>
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</div>
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<hr>
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<a name="Instruction-syntax"></a>
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<h4 class="subsection">9.40.3 Instruction syntax</h4>
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<a name="index-instruction-syntax_002c-s390"></a>
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<a name="index-s390-instruction-syntax"></a>
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<p>The assembler syntax closely follows the syntax outlined in
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Enterprise Systems Architecture/390 Principles of Operation (SA22-7201)
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and the z/Architecture Principles of Operation (SA22-7832).
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</p>
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<p>Each instruction has two major parts, the instruction mnemonic
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and the instruction operands. The instruction format varies.
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</p>
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<table class="menu" border="0" cellspacing="0">
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<tr><td align="left" valign="top">• <a href="s390-Register.html#s390-Register" accesskey="1">s390 Register</a>:</td><td> </td><td align="left" valign="top">Register Naming
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</td></tr>
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<tr><td align="left" valign="top">• <a href="s390-Mnemonics.html#s390-Mnemonics" accesskey="2">s390 Mnemonics</a>:</td><td> </td><td align="left" valign="top">Instruction Mnemonics
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</td></tr>
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<tr><td align="left" valign="top">• <a href="s390-Operands.html#s390-Operands" accesskey="3">s390 Operands</a>:</td><td> </td><td align="left" valign="top">Instruction Operands
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</td></tr>
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<tr><td align="left" valign="top">• <a href="s390-Formats.html#s390-Formats" accesskey="4">s390 Formats</a>:</td><td> </td><td align="left" valign="top">Instruction Formats
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</td></tr>
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<tr><td align="left" valign="top">• <a href="s390-Aliases.html#s390-Aliases" accesskey="5">s390 Aliases</a>:</td><td> </td><td align="left" valign="top">Instruction Aliases
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</td></tr>
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<tr><td align="left" valign="top">• <a href="s390-Operand-Modifier.html#s390-Operand-Modifier" accesskey="6">s390 Operand Modifier</a>:</td><td> </td><td align="left" valign="top">Instruction Operand Modifier
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</td></tr>
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<tr><td align="left" valign="top">• <a href="s390-Instruction-Marker.html#s390-Instruction-Marker" accesskey="7">s390 Instruction Marker</a>:</td><td> </td><td align="left" valign="top">Instruction Marker
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</td></tr>
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<tr><td align="left" valign="top">• <a href="s390-Literal-Pool-Entries.html#s390-Literal-Pool-Entries" accesskey="8">s390 Literal Pool Entries</a>:</td><td> </td><td align="left" valign="top">Literal Pool Entries
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</td></tr>
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</table>
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</body>
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</html>
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