<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
|
<html>
|
<!-- This file documents the GNU Assembler "as".
|
|
Copyright (C) 1991-2021 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".
|
-->
|
<!-- Created by GNU Texinfo 5.1, http://www.gnu.org/software/texinfo/ -->
|
<head>
|
<title>Using as: M68HC11-Directives</title>
|
|
<meta name="description" content="Using as: M68HC11-Directives">
|
<meta name="keywords" content="Using as: M68HC11-Directives">
|
<meta name="resource-type" content="document">
|
<meta name="distribution" content="global">
|
<meta name="Generator" content="makeinfo">
|
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
|
<link href="index.html#Top" rel="start" title="Top">
|
<link href="AS-Index.html#AS-Index" rel="index" title="AS Index">
|
<link href="index.html#SEC_Contents" rel="contents" title="Table of Contents">
|
<link href="M68HC11_002dDependent.html#M68HC11_002dDependent" rel="up" title="M68HC11-Dependent">
|
<link href="M68HC11_002dFloat.html#M68HC11_002dFloat" rel="next" title="M68HC11-Float">
|
<link href="M68HC11_002dModifiers.html#M68HC11_002dModifiers" rel="previous" title="M68HC11-Modifiers">
|
<style type="text/css">
|
<!--
|
a.summary-letter {text-decoration: none}
|
blockquote.smallquotation {font-size: smaller}
|
div.display {margin-left: 3.2em}
|
div.example {margin-left: 3.2em}
|
div.indentedblock {margin-left: 3.2em}
|
div.lisp {margin-left: 3.2em}
|
div.smalldisplay {margin-left: 3.2em}
|
div.smallexample {margin-left: 3.2em}
|
div.smallindentedblock {margin-left: 3.2em; font-size: smaller}
|
div.smalllisp {margin-left: 3.2em}
|
kbd {font-style:oblique}
|
pre.display {font-family: inherit}
|
pre.format {font-family: inherit}
|
pre.menu-comment {font-family: serif}
|
pre.menu-preformatted {font-family: serif}
|
pre.smalldisplay {font-family: inherit; font-size: smaller}
|
pre.smallexample {font-size: smaller}
|
pre.smallformat {font-family: inherit; font-size: smaller}
|
pre.smalllisp {font-size: smaller}
|
span.nocodebreak {white-space:nowrap}
|
span.nolinebreak {white-space:nowrap}
|
span.roman {font-family:serif; font-weight:normal}
|
span.sansserif {font-family:sans-serif; font-weight:normal}
|
ul.no-bullet {list-style: none}
|
-->
|
</style>
|
|
|
</head>
|
|
<body lang="en" bgcolor="#FFFFFF" text="#000000" link="#0000FF" vlink="#800080" alink="#FF0000">
|
<a name="M68HC11_002dDirectives"></a>
|
<div class="header">
|
<p>
|
Next: <a href="M68HC11_002dFloat.html#M68HC11_002dFloat" accesskey="n" rel="next">M68HC11-Float</a>, Previous: <a href="M68HC11_002dModifiers.html#M68HC11_002dModifiers" accesskey="p" rel="previous">M68HC11-Modifiers</a>, Up: <a href="M68HC11_002dDependent.html#M68HC11_002dDependent" accesskey="u" rel="up">M68HC11-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>
|
</div>
|
<hr>
|
<a name="Assembler-Directives-2"></a>
|
<h4 class="subsection">9.23.4 Assembler Directives</h4>
|
|
<a name="index-assembler-directives_002c-M68HC11"></a>
|
<a name="index-assembler-directives_002c-M68HC12"></a>
|
<a name="index-M68HC11-assembler-directives"></a>
|
<a name="index-M68HC12-assembler-directives"></a>
|
|
<p>The 68HC11 and 68HC12 version of <code>as</code> have the following
|
specific assembler directives:
|
</p>
|
<dl compact="compact">
|
<dt><code>.relax</code></dt>
|
<dd><a name="index-assembler-directive-_002erelax_002c-M68HC11"></a>
|
<a name="index-M68HC11-assembler-directive-_002erelax"></a>
|
<p>The relax directive is used by the ‘<samp>GNU Compiler</samp>’ to emit a specific
|
relocation to mark a group of instructions for linker relaxation.
|
The sequence of instructions within the group must be known to the linker
|
so that relaxation can be performed.
|
</p>
|
</dd>
|
<dt><code>.mode [mshort|mlong|mshort-double|mlong-double]</code></dt>
|
<dd><a name="index-assembler-directive-_002emode_002c-M68HC11"></a>
|
<a name="index-M68HC11-assembler-directive-_002emode"></a>
|
<p>This directive specifies the ABI. It overrides the ‘<samp>-mshort</samp>’,
|
‘<samp>-mlong</samp>’, ‘<samp>-mshort-double</samp>’ and ‘<samp>-mlong-double</samp>’ options.
|
</p>
|
</dd>
|
<dt><code>.far <var>symbol</var></code></dt>
|
<dd><a name="index-assembler-directive-_002efar_002c-M68HC11"></a>
|
<a name="index-M68HC11-assembler-directive-_002efar"></a>
|
<p>This directive marks the symbol as a ‘<samp>far</samp>’ symbol meaning that it
|
uses a ‘<samp>call/rtc</samp>’ calling convention as opposed to ‘<samp>jsr/rts</samp>’.
|
During a final link, the linker will identify references to the ‘<samp>far</samp>’
|
symbol and will verify the proper calling convention.
|
</p>
|
</dd>
|
<dt><code>.interrupt <var>symbol</var></code></dt>
|
<dd><a name="index-assembler-directive-_002einterrupt_002c-M68HC11"></a>
|
<a name="index-M68HC11-assembler-directive-_002einterrupt"></a>
|
<p>This directive marks the symbol as an interrupt entry point.
|
This information is then used by the debugger to correctly unwind the
|
frame across interrupts.
|
</p>
|
</dd>
|
<dt><code>.xrefb <var>symbol</var></code></dt>
|
<dd><a name="index-assembler-directive-_002exrefb_002c-M68HC11"></a>
|
<a name="index-M68HC11-assembler-directive-_002exrefb"></a>
|
<p>This directive is defined for compatibility with the
|
‘<samp>Specification for Motorola 8 and 16-Bit Assembly Language Input
|
Standard</samp>’ and is ignored.
|
</p>
|
</dd>
|
</dl>
|
|
|
|
|
</body>
|
</html>
|
