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110 lines
4.9 KiB
HTML
110 lines
4.9 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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<!-- Copyright (C) 1988-2019 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 or
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any later version published by the Free Software Foundation; with the
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Invariant Sections being "Free Software" and "Free Software Needs
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Free Documentation", with the Front-Cover Texts being "A GNU Manual,"
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and with the Back-Cover Texts as in (a) below.
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(a) The FSF's Back-Cover Text is: "You are free to copy and modify
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this GNU Manual. Buying copies from GNU Press supports the FSF in
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developing GNU and promoting software freedom." -->
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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>MIPS Embedded (Debugging with GDB)</title>
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<meta name="description" content="MIPS Embedded (Debugging with GDB)">
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<meta name="keywords" content="MIPS Embedded (Debugging with GDB)">
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<meta name="distribution" content="global">
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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="Concept-Index.html#Concept-Index" rel="index" title="Concept Index">
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<link href="index.html#SEC_Contents" rel="contents" title="Table of Contents">
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<link href="Embedded-Processors.html#Embedded-Processors" rel="up" title="Embedded Processors">
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<link href="OpenRISC-1000.html#OpenRISC-1000" rel="next" title="OpenRISC 1000">
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<link href="MicroBlaze.html#MicroBlaze" rel="prev" title="MicroBlaze">
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</head>
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<body lang="en">
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<a name="MIPS-Embedded"></a>
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<div class="header">
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<p>
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Next: <a href="OpenRISC-1000.html#OpenRISC-1000" accesskey="n" rel="next">OpenRISC 1000</a>, Previous: <a href="MicroBlaze.html#MicroBlaze" accesskey="p" rel="prev">MicroBlaze</a>, Up: <a href="Embedded-Processors.html#Embedded-Processors" accesskey="u" rel="up">Embedded Processors</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Concept-Index.html#Concept-Index" title="Index" rel="index">Index</a>]</p>
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</div>
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<hr>
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<a name="MIPS-Embedded-1"></a>
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<h4 class="subsection">21.3.5 <acronym>MIPS</acronym> Embedded</h4>
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<p><small>GDB</small> supports these special commands for <acronym>MIPS</acronym> targets:
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</p>
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<dl compact="compact">
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<dt><code>set mipsfpu double</code></dt>
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<dt><code>set mipsfpu single</code></dt>
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<dt><code>set mipsfpu none</code></dt>
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<dt><code>set mipsfpu auto</code></dt>
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<dt><code>show mipsfpu</code></dt>
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<dd><a name="index-set-mipsfpu"></a>
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<a name="index-show-mipsfpu"></a>
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<a name="index-MIPS-remote-floating-point"></a>
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<a name="index-floating-point_002c-MIPS-remote"></a>
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<p>If your target board does not support the <acronym>MIPS</acronym> floating point
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coprocessor, you should use the command ‘<samp>set mipsfpu none</samp>’ (if you
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need this, you may wish to put the command in your <small>GDB</small> init
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file). This tells <small>GDB</small> how to find the return value of
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functions which return floating point values. It also allows
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<small>GDB</small> to avoid saving the floating point registers when calling
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functions on the board. If you are using a floating point coprocessor
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with only single precision floating point support, as on the <small>R4650</small>
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processor, use the command ‘<samp>set mipsfpu single</samp>’. The default
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double precision floating point coprocessor may be selected using
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‘<samp>set mipsfpu double</samp>’.
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</p>
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<p>In previous versions the only choices were double precision or no
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floating point, so ‘<samp>set mipsfpu on</samp>’ will select double precision
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and ‘<samp>set mipsfpu off</samp>’ will select no floating point.
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</p>
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<p>As usual, you can inquire about the <code>mipsfpu</code> variable with
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‘<samp>show mipsfpu</samp>’.
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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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