123 lines
5.2 KiB
HTML
123 lines
5.2 KiB
HTML
<html>
|
||
<head>
|
||
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
|
||
<title>2. Basic Specification Layout</title>
|
||
<link rel="stylesheet" type="text/css" href="Frontpage.css">
|
||
<link rel="stylesheet" type="text/css" href="languages.css">
|
||
<meta name="generator" content="DocBook XSL Stylesheets V1.78.1">
|
||
<link rel="home" href="sleigh.html" title="SLEIGH">
|
||
<link rel="up" href="sleigh.html" title="SLEIGH">
|
||
<link rel="prev" href="sleigh.html" title="SLEIGH">
|
||
<link rel="next" href="sleigh_preprocessing.html" title="3. Preprocessing">
|
||
</head>
|
||
<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF">
|
||
<div class="navheader">
|
||
<table width="100%" summary="Navigation header">
|
||
<tr><th colspan="3" align="center">2. Basic Specification Layout</th></tr>
|
||
<tr>
|
||
<td width="20%" align="left">
|
||
<a accesskey="p" href="sleigh.html">Prev</a> </td>
|
||
<th width="60%" align="center"> </th>
|
||
<td width="20%" align="right"> <a accesskey="n" href="sleigh_preprocessing.html">Next</a>
|
||
</td>
|
||
</tr>
|
||
</table>
|
||
<hr>
|
||
</div>
|
||
<div class="sect1">
|
||
<div class="titlepage"><div><div><h2 class="title" style="clear: both">
|
||
<a name="sleigh_layout"></a>2. Basic Specification Layout</h2></div></div></div>
|
||
<p>
|
||
A SLEIGH specification is typically contained in a single file,
|
||
although see <a class="xref" href="sleigh_preprocessing.html#sleigh_including_files" title="3.1. Including Files">Section 3.1, “Including Files”</a>. The file must
|
||
follow a specific format as parsed by the SLEIGH compiler. In this
|
||
section, we list the basic formatting rules for this file as enforced
|
||
by the compiler.
|
||
</p>
|
||
<div class="sect2">
|
||
<div class="titlepage"><div><div><h3 class="title">
|
||
<a name="idm140526920986416"></a>2.1. Comments</h3></div></div></div>
|
||
<p>
|
||
Comments start with the ‘#’ character and continue to the end of the
|
||
line. Comments can appear anywhere except the <span class="emphasis"><em>display section</em></span> of a
|
||
constructor (see <a class="xref" href="sleigh_constructors.html#sleigh_display_section" title="7.3. The Display Section">Section 7.3, “The Display Section”</a>) where the ‘#’ character will be
|
||
interpreted as something that should be printed in disassembly.
|
||
</p>
|
||
</div>
|
||
<div class="sect2">
|
||
<div class="titlepage"><div><div><h3 class="title">
|
||
<a name="idm140526920983776"></a>2.2. Identifiers</h3></div></div></div>
|
||
<p>
|
||
Identifiers are made up of letters a-z, capitals A-Z, digits 0-9 and
|
||
the characters ‘.’ and ‘_’. An identifier can use these characters in
|
||
any order and for any length, but it must not start with a digit.
|
||
</p>
|
||
</div>
|
||
<div class="sect2">
|
||
<div class="titlepage"><div><div><h3 class="title">
|
||
<a name="idm140526920982144"></a>2.3. Strings</h3></div></div></div>
|
||
<p>
|
||
String literals can be used, when specifying names and when specifying
|
||
how disassembly should be printed, so that special characters are
|
||
treated as literals. Strings are surrounded by the double quote
|
||
character ‘”’ and all characters in between lose their special
|
||
meaning.
|
||
</p>
|
||
</div>
|
||
<div class="sect2">
|
||
<div class="titlepage"><div><div><h3 class="title">
|
||
<a name="idm140526920980384"></a>2.4. Integers</h3></div></div></div>
|
||
<p>
|
||
Integers are specified either in a decimal format or in a standard
|
||
<span class="emphasis"><em>C-style</em></span> hexadecimal format by prepending the
|
||
number with “0x”. Alternately, a binary representation of an integer
|
||
can be given by prepending the string of '0' and '1' characters with "0b".
|
||
</p>
|
||
<div class="informalexample"><pre class="programlisting">
|
||
1006789
|
||
0xF5CC5
|
||
0xf5cc5
|
||
0b11110101110011000101
|
||
</pre></div>
|
||
<p>
|
||
Numbers are treated as unsigned
|
||
except when used in patterns where they are treated as signed (see
|
||
<a class="xref" href="sleigh_constructors.html#sleigh_bit_pattern" title="7.4. The Bit Pattern Section">Section 7.4, “The Bit Pattern Section”</a>). The number of bytes used to
|
||
encode the integer when specifying the semantics of an instruction is
|
||
inferred from other parts of the syntax (see
|
||
<a class="xref" href="sleigh_constructors.html#sleigh_display_section" title="7.3. The Display Section">Section 7.3, “The Display Section”</a>). Otherwise, integers should
|
||
be thought of as having arbitrary precision. Currently, SLEIGH stores
|
||
integers internally with 64 bits of precision.
|
||
</p>
|
||
</div>
|
||
<div class="sect2">
|
||
<div class="titlepage"><div><div><h3 class="title">
|
||
<a name="idm140526920976000"></a>2.5. White Space</h3></div></div></div>
|
||
<p>
|
||
White space characters include space, tab, line-feed, vertical
|
||
line-feed, and carriage-return (‘ ‘, ‘\t’, ‘\r’, ‘\v’,
|
||
‘\n’). Variations in spacing have no effect on the parsing of the file
|
||
except in string literals.
|
||
</p>
|
||
</div>
|
||
</div>
|
||
<div class="navfooter">
|
||
<hr>
|
||
<table width="100%" summary="Navigation footer">
|
||
<tr>
|
||
<td width="40%" align="left">
|
||
<a accesskey="p" href="sleigh.html">Prev</a> </td>
|
||
<td width="20%" align="center"> </td>
|
||
<td width="40%" align="right"> <a accesskey="n" href="sleigh_preprocessing.html">Next</a>
|
||
</td>
|
||
</tr>
|
||
<tr>
|
||
<td width="40%" align="left" valign="top">SLEIGH </td>
|
||
<td width="20%" align="center"><a accesskey="h" href="sleigh.html">Home</a></td>
|
||
<td width="40%" align="right" valign="top"> 3. Preprocessing</td>
|
||
</tr>
|
||
</table>
|
||
</div>
|
||
</body>
|
||
</html>
|