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134 lines
5.0 KiB
HTML
134 lines
5.0 KiB
HTML
4 years ago
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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
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<html>
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<!-- This file documents the GNU Assembler "as".
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Copyright (C) 1991-2019 Free Software Foundation, Inc.
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Permission is granted to copy, distribute and/or modify this document
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under the terms of the GNU Free Documentation License, Version 1.3
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or any later version published by the Free Software Foundation;
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with no Invariant Sections, with no Front-Cover Texts, and with no
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Back-Cover Texts. A copy of the license is included in the
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section entitled "GNU Free Documentation License".
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-->
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<!-- Created by GNU Texinfo 6.4, http://www.gnu.org/software/texinfo/ -->
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<head>
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<title>MicroBlaze Directives (Using as)</title>
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<meta name="description" content="MicroBlaze Directives (Using as)">
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<meta name="keywords" content="MicroBlaze Directives (Using as)">
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<meta name="resource-type" content="document">
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<meta name="distribution" content="global">
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<meta name="Generator" content="makeinfo">
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
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<link href="index.html#Top" rel="start" title="Top">
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<link href="AS-Index.html#AS-Index" rel="index" title="AS Index">
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<link href="index.html#SEC_Contents" rel="contents" title="Table of Contents">
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<link href="MicroBlaze_002dDependent.html#MicroBlaze_002dDependent" rel="up" title="MicroBlaze-Dependent">
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<link href="MicroBlaze-Syntax.html#MicroBlaze-Syntax" rel="next" title="MicroBlaze Syntax">
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<link href="MicroBlaze_002dDependent.html#MicroBlaze_002dDependent" rel="prev" title="MicroBlaze-Dependent">
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<style type="text/css">
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<!--
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a.summary-letter {text-decoration: none}
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blockquote.indentedblock {margin-right: 0em}
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blockquote.smallindentedblock {margin-right: 0em; font-size: smaller}
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blockquote.smallquotation {font-size: smaller}
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div.display {margin-left: 3.2em}
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div.example {margin-left: 3.2em}
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div.lisp {margin-left: 3.2em}
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div.smalldisplay {margin-left: 3.2em}
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div.smallexample {margin-left: 3.2em}
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div.smalllisp {margin-left: 3.2em}
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kbd {font-style: oblique}
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pre.display {font-family: inherit}
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pre.format {font-family: inherit}
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pre.menu-comment {font-family: serif}
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pre.menu-preformatted {font-family: serif}
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pre.smalldisplay {font-family: inherit; font-size: smaller}
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pre.smallexample {font-size: smaller}
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pre.smallformat {font-family: inherit; font-size: smaller}
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pre.smalllisp {font-size: smaller}
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span.nolinebreak {white-space: nowrap}
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span.roman {font-family: initial; font-weight: normal}
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span.sansserif {font-family: sans-serif; font-weight: normal}
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ul.no-bullet {list-style: none}
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-->
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</style>
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</head>
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<body lang="en">
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<a name="MicroBlaze-Directives"></a>
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<div class="header">
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<p>
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Next: <a href="MicroBlaze-Syntax.html#MicroBlaze-Syntax" accesskey="n" rel="next">MicroBlaze Syntax</a>, Up: <a href="MicroBlaze_002dDependent.html#MicroBlaze_002dDependent" accesskey="u" rel="up">MicroBlaze-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>
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</div>
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<hr>
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<a name="Directives-1"></a>
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<h4 class="subsection">9.25.1 Directives</h4>
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<a name="index-MicroBlaze-directives"></a>
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<p>A number of assembler directives are available for MicroBlaze.
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</p>
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<dl compact="compact">
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<dt><code>.data8 <var>expression</var>,...</code></dt>
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<dd><p>This directive is an alias for <code>.byte</code>. Each expression is assembled
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into an eight-bit value.
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</p>
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</dd>
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<dt><code>.data16 <var>expression</var>,...</code></dt>
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<dd><p>This directive is an alias for <code>.hword</code>. Each expression is assembled
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into an 16-bit value.
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</p>
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</dd>
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<dt><code>.data32 <var>expression</var>,...</code></dt>
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<dd><p>This directive is an alias for <code>.word</code>. Each expression is assembled
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into an 32-bit value.
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</p>
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</dd>
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<dt><code>.ent <var>name</var>[,<var>label</var>]</code></dt>
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<dd><p>This directive is an alias for <code>.func</code> denoting the start of function
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<var>name</var> at (optional) <var>label</var>.
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</p>
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</dd>
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<dt><code>.end <var>name</var>[,<var>label</var>]</code></dt>
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<dd><p>This directive is an alias for <code>.endfunc</code> denoting the end of function
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<var>name</var>.
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</p>
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</dd>
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<dt><code>.gpword <var>label</var>,...</code></dt>
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<dd><p>This directive is an alias for <code>.rva</code>. The resolved address of <var>label</var>
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is stored in the data section.
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</p>
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</dd>
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<dt><code>.weakext <var>label</var></code></dt>
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<dd><p>Declare that <var>label</var> is a weak external symbol.
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</p>
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</dd>
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<dt><code>.rodata</code></dt>
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<dd><p>Switch to .rodata section. Equivalent to <code>.section .rodata</code>
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</p>
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</dd>
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<dt><code>.sdata2</code></dt>
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<dd><p>Switch to .sdata2 section. Equivalent to <code>.section .sdata2</code>
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</p>
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</dd>
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<dt><code>.sdata</code></dt>
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<dd><p>Switch to .sdata section. Equivalent to <code>.section .sdata</code>
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</p>
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</dd>
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<dt><code>.bss</code></dt>
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<dd><p>Switch to .bss section. Equivalent to <code>.section .bss</code>
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</p>
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</dd>
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<dt><code>.sbss</code></dt>
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<dd><p>Switch to .sbss section. Equivalent to <code>.section .sbss</code>
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</p></dd>
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</dl>
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</body>
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</html>
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