65 lines
2.8 KiB
HTML
65 lines
2.8 KiB
HTML
|
<html lang="en">
|
||
|
|
<head>
|
||
|
|
<title>Expressions - 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="Symbols.html#Symbols" title="Symbols">
|
||
|
|
<link rel="next" href="Pseudo-Ops.html#Pseudo-Ops" title="Pseudo Ops">
|
||
|
|
<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="Expressions"></a>Next: <a rel="next" accesskey="n" href="Pseudo-Ops.html#Pseudo-Ops">Pseudo Ops</a>,
|
||
|
|
Previous: <a rel="previous" accesskey="p" href="Symbols.html#Symbols">Symbols</a>,
|
||
|
|
Up: <a rel="up" accesskey="u" href="index.html#Top">Top</a>
|
||
|
|
<hr><br>
|
||
|
|
</div>
|
||
|
|
|
||
|
|
<h2 class="chapter">6 Expressions</h2>
|
||
|
|
|
||
|
|
<p><a name="index-expressions-241"></a><a name="index-addresses-242"></a><a name="index-numeric-values-243"></a>An <dfn>expression</dfn> specifies an address or numeric value.
|
||
|
|
Whitespace may precede and/or follow an expression.
|
||
|
|
|
||
|
|
<p>The result of an expression must be an absolute number, or else an offset into
|
||
|
|
a particular section. If an expression is not absolute, and there is not
|
||
|
|
enough information when <span class="command">as</span> sees the expression to know its
|
||
|
|
section, a second pass over the source program might be necessary to interpret
|
||
|
|
the expression—but the second pass is currently not implemented.
|
||
|
|
<span class="command">as</span> aborts with an error message in this situation.
|
||
|
|
|
||
|
|
<ul class="menu">
|
||
|
|
<li><a accesskey="1" href="Empty-Exprs.html#Empty-Exprs">Empty Exprs</a>: Empty Expressions
|
||
|
|
<li><a accesskey="2" href="Integer-Exprs.html#Integer-Exprs">Integer Exprs</a>: Integer Expressions
|
||
|
|
</ul>
|
||
|
|
|
||
|
|
</body></html>
|
||
|
|
|