121 lines
5.7 KiB
HTML
121 lines
5.7 KiB
HTML
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Permission is granted to copy, distribute and/or modify this document
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(see below). A copy of the license is included in the section entitled
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"GNU Free Documentation License".
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(a) The FSF's Front-Cover Text is:
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A GNU Manual
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<!-- Created by GNU Texinfo 5.2, http://www.gnu.org/software/texinfo/ -->
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<head>
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<title>Using the GNU Compiler Collection (GCC): Nios II Function Attributes</title>
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<meta name="description" content="Using the GNU Compiler Collection (GCC): Nios II Function Attributes">
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<meta name="keywords" content="Using the GNU Compiler Collection (GCC): Nios II Function Attributes">
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<link href="index.html#Top" rel="start" title="Top">
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<link href="Option-Index.html#Option-Index" rel="index" title="Option Index">
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<link href="index.html#SEC_Contents" rel="contents" title="Table of Contents">
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<link href="Function-Attributes.html#Function-Attributes" rel="up" title="Function Attributes">
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<link href="Nvidia-PTX-Function-Attributes.html#Nvidia-PTX-Function-Attributes" rel="next" title="Nvidia PTX Function Attributes">
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<link href="NDS32-Function-Attributes.html#NDS32-Function-Attributes" rel="prev" title="NDS32 Function Attributes">
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<body lang="en" bgcolor="#FFFFFF" text="#000000" link="#0000FF" vlink="#800080" alink="#FF0000">
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<a name="Nios-II-Function-Attributes"></a>
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<div class="header">
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<p>
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Next: <a href="Nvidia-PTX-Function-Attributes.html#Nvidia-PTX-Function-Attributes" accesskey="n" rel="next">Nvidia PTX Function Attributes</a>, Previous: <a href="NDS32-Function-Attributes.html#NDS32-Function-Attributes" accesskey="p" rel="prev">NDS32 Function Attributes</a>, Up: <a href="Function-Attributes.html#Function-Attributes" accesskey="u" rel="up">Function Attributes</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Option-Index.html#Option-Index" title="Index" rel="index">Index</a>]</p>
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</div>
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<hr>
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<a name="Nios-II-Function-Attributes-1"></a>
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<h4 class="subsection">6.31.21 Nios II Function Attributes</h4>
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<p>These function attributes are supported by the Nios II back end:
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</p>
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<dl compact="compact">
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<dt><code>target (<var>options</var>)</code></dt>
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<dd><a name="index-target-function-attribute-2"></a>
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<p>As discussed in <a href="Common-Function-Attributes.html#Common-Function-Attributes">Common Function Attributes</a>, this attribute
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allows specification of target-specific compilation options.
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</p>
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<p>When compiling for Nios II, the following options are allowed:
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</p>
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<dl compact="compact">
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<dt>‘<samp>custom-<var>insn</var>=<var>N</var></samp>’</dt>
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<dt>‘<samp>no-custom-<var>insn</var></samp>’</dt>
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<dd><a name="index-target_0028_0022custom_002dinsn_003dN_0022_0029-function-attribute_002c-Nios-II"></a>
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<a name="index-target_0028_0022no_002dcustom_002dinsn_0022_0029-function-attribute_002c-Nios-II"></a>
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<p>Each ‘<samp>custom-<var>insn</var>=<var>N</var></samp>’ attribute locally enables use of a
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custom instruction with encoding <var>N</var> when generating code that uses
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<var>insn</var>. Similarly, ‘<samp>no-custom-<var>insn</var></samp>’ locally inhibits use of
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the custom instruction <var>insn</var>.
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These target attributes correspond to the
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<samp>-mcustom-<var>insn</var>=<var>N</var></samp> and <samp>-mno-custom-<var>insn</var></samp>
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command-line options, and support the same set of <var>insn</var> keywords.
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See <a href="Nios-II-Options.html#Nios-II-Options">Nios II Options</a>, for more information.
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</p>
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</dd>
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<dt>‘<samp>custom-fpu-cfg=<var>name</var></samp>’</dt>
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<dd><a name="index-target_0028_0022custom_002dfpu_002dcfg_003dname_0022_0029-function-attribute_002c-Nios-II"></a>
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<p>This attribute corresponds to the <samp>-mcustom-fpu-cfg=<var>name</var></samp>
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command-line option, to select a predefined set of custom instructions
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named <var>name</var>.
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See <a href="Nios-II-Options.html#Nios-II-Options">Nios II Options</a>, for more information.
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</p></dd>
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</dl>
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</dd>
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</dl>
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</body>
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</html>
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