You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
90 lines
5.3 KiB
HTML
90 lines
5.3 KiB
HTML
<html lang="en">
|
|
<head>
|
|
<title>AArch64 Extensions - Using as</title>
|
|
<meta http-equiv="Content-Type" content="text/html">
|
|
<meta name="description" content="Using as">
|
|
<meta name="generator" content="makeinfo 4.13">
|
|
<link title="Top" rel="start" href="index.html#Top">
|
|
<link rel="up" href="AArch64_002dDependent.html#AArch64_002dDependent" title="AArch64-Dependent">
|
|
<link rel="prev" href="AArch64-Options.html#AArch64-Options" title="AArch64 Options">
|
|
<link rel="next" href="AArch64-Syntax.html#AArch64-Syntax" title="AArch64 Syntax">
|
|
<link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
|
|
<!--
|
|
This file documents the GNU Assembler "as".
|
|
|
|
Copyright (C) 1991-2015 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''.
|
|
|
|
-->
|
|
<meta http-equiv="Content-Style-Type" content="text/css">
|
|
<style type="text/css"><!--
|
|
pre.display { font-family:inherit }
|
|
pre.format { font-family:inherit }
|
|
pre.smalldisplay { font-family:inherit; font-size:smaller }
|
|
pre.smallformat { font-family:inherit; font-size:smaller }
|
|
pre.smallexample { font-size:smaller }
|
|
pre.smalllisp { font-size:smaller }
|
|
span.sc { font-variant:small-caps }
|
|
span.roman { font-family:serif; font-weight:normal; }
|
|
span.sansserif { font-family:sans-serif; font-weight:normal; }
|
|
--></style>
|
|
</head>
|
|
<body>
|
|
<div class="node">
|
|
<a name="AArch64-Extensions"></a>
|
|
<p>
|
|
Next: <a rel="next" accesskey="n" href="AArch64-Syntax.html#AArch64-Syntax">AArch64 Syntax</a>,
|
|
Previous: <a rel="previous" accesskey="p" href="AArch64-Options.html#AArch64-Options">AArch64 Options</a>,
|
|
Up: <a rel="up" accesskey="u" href="AArch64_002dDependent.html#AArch64_002dDependent">AArch64-Dependent</a>
|
|
<hr>
|
|
</div>
|
|
|
|
<h4 class="subsection">9.1.2 Architecture Extensions</h4>
|
|
|
|
<p>The table below lists the permitted architecture extensions that are
|
|
supported by the assembler and the conditions under which they are
|
|
automatically enabled.
|
|
|
|
<p>Multiple extensions may be specified, separated by a <code>+</code>.
|
|
Extension mnemonics may also be removed from those the assembler
|
|
accepts. This is done by prepending <code>no</code> to the option that adds
|
|
the extension. Extensions that are removed must be listed after all
|
|
extensions that have been added.
|
|
|
|
<p>Enabling an extension that requires other extensions will
|
|
automatically cause those extensions to be enabled. Similarly,
|
|
disabling an extension that is required by other extensions will
|
|
automatically cause those extensions to be disabled.
|
|
|
|
<p><table summary=""><tr align="left"><th valign="top" width="12%">Extension </th><th valign="top" width="17%">Minimum Architecture </th><th valign="top" width="17%">Enabled by default
|
|
</th><th valign="top" width="54%">Description
|
|
<br></th></tr><tr align="left"><td valign="top" width="12%"><code>crc</code> </td><td valign="top" width="17%">ARMv8-A </td><td valign="top" width="17%">ARMv8.1-A or later
|
|
</td><td valign="top" width="54%">Enable CRC instructions.
|
|
<br></td></tr><tr align="left"><td valign="top" width="12%"><code>crypto</code> </td><td valign="top" width="17%">ARMv8-A </td><td valign="top" width="17%">No
|
|
</td><td valign="top" width="54%">Enable cryptographic extensions. This implies <code>fp</code> and <code>simd</code>.
|
|
<br></td></tr><tr align="left"><td valign="top" width="12%"><code>fp</code> </td><td valign="top" width="17%">ARMv8-A </td><td valign="top" width="17%">ARMv8-A or later
|
|
</td><td valign="top" width="54%">Enable floating-point extensions.
|
|
<br></td></tr><tr align="left"><td valign="top" width="12%"><code>simd</code> </td><td valign="top" width="17%">ARMv8-A </td><td valign="top" width="17%">ARMv8-A or later
|
|
</td><td valign="top" width="54%">Enable Advanced SIMD extensions. This implies <code>fp</code>.
|
|
<br></td></tr><tr align="left"><td valign="top" width="12%"><code>pan</code> </td><td valign="top" width="17%">ARMv8-A </td><td valign="top" width="17%">ARMv8-A or later
|
|
</td><td valign="top" width="54%">Enable Privileged Access Never support.
|
|
<br></td></tr><tr align="left"><td valign="top" width="12%"><code>lor</code> </td><td valign="top" width="17%">ARMv8-A </td><td valign="top" width="17%">ARMv8-A or later
|
|
</td><td valign="top" width="54%">Enable Limited Ordering Regions extensions.
|
|
<br></td></tr><tr align="left"><td valign="top" width="12%"><code>rdma</code> </td><td valign="top" width="17%">ARMv8-A </td><td valign="top" width="17%">ARMv8-A or later
|
|
</td><td valign="top" width="54%">Enable ARMv8.1 Advanced SIMD extensions. This implies <code>simd</code>.
|
|
<br></td></tr><tr align="left"><td valign="top" width="12%"><code>fp16</code> </td><td valign="top" width="17%">ARMv8.2-A </td><td valign="top" width="17%">ARMv8.2-A or later
|
|
</td><td valign="top" width="54%">Enable ARMv8.2 16-bit floating-point support. This implies
|
|
<code>fp</code>.
|
|
<br></td></tr><tr align="left"><td valign="top" width="12%"><code>profile</code> </td><td valign="top" width="17%">ARMv8.2-A </td><td valign="top" width="17%">No
|
|
</td><td valign="top" width="54%">Enable statistical profiling extensions.
|
|
<br></td></tr></table>
|
|
|
|
</body></html>
|
|
|