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MIPS-FP-ABI-Compatibility.html

MIPS-FP-ABI-Compatibility.html 3.9 KB
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  63. <a name="MIPS-FP-ABI-Compatibility"></a>
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  66. 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> &nbsp; [<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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  69. <a name="Linking-different-FP-ABI-variants"></a>
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  70. <h4 class="subsubsection">9.27.9.4 Linking different FP ABI variants</h4>
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  71. <p>Modules using the default FP ABI (no floating-point) can be linked with
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  72. any other (singular) FP ABI variant.
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  73. </p>
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  74. <p>Special compatibility support exists for O32 with the four
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  75. double-precision FP ABI variants.  The &lsquo;<samp>-mfpxx</samp>&rsquo; FP ABI is specifically
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  76. designed to be compatible with the standard double-precision ABI and the
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  77. &lsquo;<samp>-mfp64</samp>&rsquo; FP ABIs.  This makes it desirable for O32 modules to be
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  78. built as &lsquo;<samp>-mfpxx</samp>&rsquo; to ensure the maximum compatibility with other
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  79. modules produced for more specific needs.  The only FP ABIs which cannot
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  80. be linked together are the standard double-precision ABI and the full
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  81. &lsquo;<samp>-mfp64</samp>&rsquo; ABI with &lsquo;<samp>-modd-spreg</samp>&rsquo;.
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