62 lines
2.8 KiB
HTML
62 lines
2.8 KiB
HTML
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<html lang="en">
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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="Using as">
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<meta name="generator" content="makeinfo 4.13">
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<link title="Top" rel="start" href="index.html#Top">
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<link rel="up" href="MIPS-FP-ABIs.html#MIPS-FP-ABIs" title="MIPS FP ABIs">
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<link rel="prev" href="MIPS-FP-ABI-Selection.html#MIPS-FP-ABI-Selection" title="MIPS FP ABI Selection">
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<link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
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<!--
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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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<style type="text/css"><!--
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--></style>
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</head>
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<body>
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<div class="node">
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<a name="MIPS-FP-ABI-Compatibility"></a>
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<p>
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Previous: <a rel="previous" accesskey="p" href="MIPS-FP-ABI-Selection.html#MIPS-FP-ABI-Selection">MIPS FP ABI Selection</a>,
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Up: <a rel="up" accesskey="u" href="MIPS-FP-ABIs.html#MIPS-FP-ABIs">MIPS FP ABIs</a>
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<hr>
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</div>
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<h5 class="subsubsection">9.27.9.4 Linking different FP ABI variants</h5>
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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>Special compatibility support exists for O32 with the four
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double-precision FP ABI variants. The ‘<samp><span class="samp">-mfpxx</span></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><span class="samp">-mfp64</span></samp>’ FP ABIs. This makes it desirable for O32 modules to be
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built as ‘<samp><span class="samp">-mfpxx</span></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><span class="samp">-mfp64</span></samp>’ ABI with ‘<samp><span class="samp">-modd-spreg</span></samp>’.
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</body></html>
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