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87 lines
3.9 KiB
HTML
87 lines
3.9 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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<!-- 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>MIPS FP ABI Compatibility (Using as)</title>
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<meta name="description" content="MIPS FP ABI Compatibility (Using as)">
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<meta name="keywords" content="MIPS FP ABI Compatibility (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="MIPS-FP-ABIs.html#MIPS-FP-ABIs" rel="up" title="MIPS FP ABIs">
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<link href="MIPS-NaN-Encodings.html#MIPS-NaN-Encodings" rel="next" title="MIPS NaN Encodings">
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<link href="MIPS-FP-ABI-Selection.html#MIPS-FP-ABI-Selection" rel="prev" title="MIPS FP ABI Selection">
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<style type="text/css">
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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="MIPS-FP-ABI-Compatibility"></a>
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<div class="header">
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<p>
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Previous: <a href="MIPS-FP-ABI-Selection.html#MIPS-FP-ABI-Selection" accesskey="p" rel="prev">MIPS FP ABI Selection</a>, Up: <a href="MIPS-FP-ABIs.html#MIPS-FP-ABIs" accesskey="u" rel="up">MIPS FP ABIs</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="Linking-different-FP-ABI-variants"></a>
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<h4 class="subsubsection">9.26.9.4 Linking different FP ABI variants</h4>
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<p>Modules using the default FP ABI (no floating-point) can be linked with
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any other (singular) FP ABI variant.
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</p>
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<p>Special compatibility support exists for O32 with the four
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double-precision FP ABI variants. The ‘<samp>-mfpxx</samp>’ FP ABI is specifically
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designed to be compatible with the standard double-precision ABI and the
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‘<samp>-mfp64</samp>’ FP ABIs. This makes it desirable for O32 modules to be
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built as ‘<samp>-mfpxx</samp>’ to ensure the maximum compatibility with other
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modules produced for more specific needs. The only FP ABIs which cannot
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be linked together are the standard double-precision ABI and the full
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‘<samp>-mfp64</samp>’ ABI with ‘<samp>-modd-spreg</samp>’.
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</p>
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</body>
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</html>
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