<html lang="en"> <head> <title>Syntax - Using as</title> <meta http-equiv="Content-Type" content="text/html"> <meta name="description" content="Using as"> <meta name="generator" content="makeinfo 4.13"> <link title="Top" rel="start" href="index.html#Top"> <link rel="prev" href="Invoking.html#Invoking" title="Invoking"> <link rel="next" href="Sections.html#Sections" title="Sections"> <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage"> <!-- This file documents the GNU Assembler "as". Copyright (C) 1991-2015 Free Software Foundation, Inc. Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.3 or any later version published by the Free Software Foundation; with no Invariant Sections, with no Front-Cover Texts, and with no Back-Cover Texts. A copy of the license is included in the section entitled ``GNU Free Documentation License''. --> <meta http-equiv="Content-Style-Type" content="text/css"> <style type="text/css"><!-- pre.display { font-family:inherit } pre.format { font-family:inherit } pre.smalldisplay { font-family:inherit; font-size:smaller } pre.smallformat { font-family:inherit; font-size:smaller } pre.smallexample { font-size:smaller } pre.smalllisp { font-size:smaller } span.sc { font-variant:small-caps } span.roman { font-family:serif; font-weight:normal; } span.sansserif { font-family:sans-serif; font-weight:normal; } --></style> </head> <body> <div class="node"> <a name="Syntax"></a> <p> Next: <a rel="next" accesskey="n" href="Sections.html#Sections">Sections</a>, Previous: <a rel="previous" accesskey="p" href="Invoking.html#Invoking">Invoking</a>, Up: <a rel="up" accesskey="u" href="index.html#Top">Top</a> <hr> </div> <h2 class="chapter">3 Syntax</h2> <p><a name="index-machine_002dindependent-syntax-112"></a><a name="index-syntax_002c-machine_002dindependent-113"></a>This chapter describes the machine-independent syntax allowed in a source file. <samp><span class="command">as</span></samp> syntax is similar to what many other assemblers use; it is inspired by the BSD 4.2 assembler, except that <samp><span class="command">as</span></samp> does not assemble Vax bit-fields. <ul class="menu"> <li><a accesskey="1" href="Preprocessing.html#Preprocessing">Preprocessing</a>: Preprocessing <li><a accesskey="2" href="Whitespace.html#Whitespace">Whitespace</a>: Whitespace <li><a accesskey="3" href="Comments.html#Comments">Comments</a>: Comments <li><a accesskey="4" href="Symbol-Intro.html#Symbol-Intro">Symbol Intro</a>: Symbols <li><a accesskey="5" href="Statements.html#Statements">Statements</a>: Statements <li><a accesskey="6" href="Constants.html#Constants">Constants</a>: Constants </ul> </body></html>