<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 4.7"> <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, 92, 93, 94, 95, 96, 97, 98, 99, 2000, 2001, 2002, 2006, 2007 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 1.1 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''. man end--> <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; } --></style> </head> <body> <div class="node"> <p> <a name="Syntax"></a>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><br> </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. <span class="command">as</span> syntax is similar to what many other assemblers use; it is inspired by the BSD 4.2 assembler, except that <span class="command">as</span> 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>