114 lines
4.6 KiB
HTML
114 lines
4.6 KiB
HTML
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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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<!-- Copyright (C) 1988-2016 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 or
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any later version published by the Free Software Foundation; with the
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Invariant Sections being "Funding Free Software", the Front-Cover
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Texts being (a) (see below), and with the Back-Cover Texts being (b)
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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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(b) The FSF's Back-Cover Text is:
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You have freedom to copy and modify this GNU Manual, like GNU
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software. Copies published by the Free Software Foundation raise
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funds for GNU development. -->
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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): M32C Pragmas</title>
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<meta name="description" content="Using the GNU Compiler Collection (GCC): M32C Pragmas">
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<meta name="keywords" content="Using the GNU Compiler Collection (GCC): M32C Pragmas">
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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="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="Pragmas.html#Pragmas" rel="up" title="Pragmas">
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<link href="MeP-Pragmas.html#MeP-Pragmas" rel="next" title="MeP Pragmas">
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<link href="ARM-Pragmas.html#ARM-Pragmas" rel="prev" title="ARM Pragmas">
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<style type="text/css">
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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" bgcolor="#FFFFFF" text="#000000" link="#0000FF" vlink="#800080" alink="#FF0000">
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<a name="M32C-Pragmas"></a>
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<div class="header">
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<p>
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Next: <a href="MeP-Pragmas.html#MeP-Pragmas" accesskey="n" rel="next">MeP Pragmas</a>, Previous: <a href="ARM-Pragmas.html#ARM-Pragmas" accesskey="p" rel="prev">ARM Pragmas</a>, Up: <a href="Pragmas.html#Pragmas" accesskey="u" rel="up">Pragmas</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="M32C-Pragmas-1"></a>
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<h4 class="subsection">6.61.3 M32C Pragmas</h4>
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<dl compact="compact">
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<dt><code>GCC memregs <var>number</var></code></dt>
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<dd><a name="index-pragma_002c-memregs"></a>
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<p>Overrides the command-line option <code>-memregs=</code> for the current
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file. Use with care! This pragma must be before any function in the
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file, and mixing different memregs values in different objects may
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make them incompatible. This pragma is useful when a
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performance-critical function uses a memreg for temporary values,
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as it may allow you to reduce the number of memregs used.
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</p>
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</dd>
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<dt><code>ADDRESS <var>name</var> <var>address</var></code></dt>
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<dd><a name="index-pragma_002c-address"></a>
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<p>For any declared symbols matching <var>name</var>, this does three things
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to that symbol: it forces the symbol to be located at the given
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address (a number), it forces the symbol to be volatile, and it
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changes the symbol’s scope to be static. This pragma exists for
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compatibility with other compilers, but note that the common
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<code>1234H</code> numeric syntax is not supported (use <code>0x1234</code>
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instead). Example:
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</p>
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<div class="smallexample">
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<pre class="smallexample">#pragma ADDRESS port3 0x103
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char port3;
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</pre></div>
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</dd>
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</dl>
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</body>
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</html>
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