| <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> |
| <html> |
| <!-- This file documents the GNU Assembler "as". |
| |
| Copyright (C) 1991-2014 Free Software Foundation, Inc. |
| |
| Permission is granted to copy, distribute and/or modify this document |
| under the terms of the GNU Free Documentation License, Version 1.3 |
| or any later version published by the Free Software Foundation; |
| with no Invariant Sections, with no Front-Cover Texts, and with no |
| Back-Cover Texts. A copy of the license is included in the |
| section entitled "GNU Free Documentation License". |
| --> |
| <!-- Created by GNU Texinfo 5.2, http://www.gnu.org/software/texinfo/ --> |
| <head> |
| <title>Using as: MIPS FP ABI Compatibility</title> |
| |
| <meta name="description" content="Using as: MIPS FP ABI Compatibility"> |
| <meta name="keywords" content="Using as: MIPS FP ABI Compatibility"> |
| <meta name="resource-type" content="document"> |
| <meta name="distribution" content="global"> |
| <meta name="Generator" content="makeinfo"> |
| <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> |
| <link href="index.html#Top" rel="start" title="Top"> |
| <link href="AS-Index.html#AS-Index" rel="index" title="AS Index"> |
| <link href="index.html#SEC_Contents" rel="contents" title="Table of Contents"> |
| <link href="MIPS-FP-ABIs.html#MIPS-FP-ABIs" rel="up" title="MIPS FP ABIs"> |
| <link href="MIPS-NaN-Encodings.html#MIPS-NaN-Encodings" rel="next" title="MIPS NaN Encodings"> |
| <link href="MIPS-FP-ABI-Selection.html#MIPS-FP-ABI-Selection" rel="prev" title="MIPS FP ABI Selection"> |
| <style type="text/css"> |
| <!-- |
| a.summary-letter {text-decoration: none} |
| blockquote.smallquotation {font-size: smaller} |
| div.display {margin-left: 3.2em} |
| div.example {margin-left: 3.2em} |
| div.indentedblock {margin-left: 3.2em} |
| div.lisp {margin-left: 3.2em} |
| div.smalldisplay {margin-left: 3.2em} |
| div.smallexample {margin-left: 3.2em} |
| div.smallindentedblock {margin-left: 3.2em; font-size: smaller} |
| div.smalllisp {margin-left: 3.2em} |
| kbd {font-style:oblique} |
| pre.display {font-family: inherit} |
| pre.format {font-family: inherit} |
| pre.menu-comment {font-family: serif} |
| pre.menu-preformatted {font-family: serif} |
| pre.smalldisplay {font-family: inherit; font-size: smaller} |
| pre.smallexample {font-size: smaller} |
| pre.smallformat {font-family: inherit; font-size: smaller} |
| pre.smalllisp {font-size: smaller} |
| span.nocodebreak {white-space:nowrap} |
| span.nolinebreak {white-space:nowrap} |
| span.roman {font-family:serif; font-weight:normal} |
| span.sansserif {font-family:sans-serif; font-weight:normal} |
| ul.no-bullet {list-style: none} |
| --> |
| </style> |
| |
| |
| </head> |
| |
| <body lang="en" bgcolor="#FFFFFF" text="#000000" link="#0000FF" vlink="#800080" alink="#FF0000"> |
| <a name="MIPS-FP-ABI-Compatibility"></a> |
| <div class="header"> |
| <p> |
| 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> |
| </div> |
| <hr> |
| <a name="Linking-different-FP-ABI-variants"></a> |
| <h4 class="subsubsection">9.27.9.4 Linking different FP ABI variants</h4> |
| <p>Modules using the default FP ABI (no floating-point) can be linked with |
| any other (singular) FP ABI variant. |
| </p> |
| <p>Special compatibility support exists for O32 with the four |
| double-precision FP ABI variants. The ‘<samp>-mfpxx</samp>’ FP ABI is specifically |
| designed to be compatible with the standard double-precision ABI and the |
| ‘<samp>-mfp64</samp>’ FP ABIs. This makes it desirable for O32 modules to be |
| built as ‘<samp>-mfpxx</samp>’ to ensure the maximum compatibility with other |
| modules produced for more specific needs. The only FP ABIs which cannot |
| be linked together are the standard double-precision ABI and the full |
| ‘<samp>-mfp64</samp>’ ABI with ‘<samp>-modd-spreg</samp>’. |
| </p> |
| |
| |
| |
| </body> |
| </html> |
