visus
/
toolchain-gcc-arm-embedded


			
							<!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) 1991-2020 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 6.5, http://www.gnu.org/software/texinfo/ -->
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>NDS32-Regs (Using as)</title>

<meta name="description" content="NDS32-Regs (Using as)">
<meta name="keywords" content="NDS32-Regs (Using as)">
<meta name="resource-type" content="document">
<meta name="distribution" content="global">
<meta name="Generator" content="makeinfo">
<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="NDS32-Syntax.html#NDS32-Syntax" rel="up" title="NDS32 Syntax">
<link href="NDS32_002dOps.html#NDS32_002dOps" rel="next" title="NDS32-Ops">
<link href="NDS32_002dChars.html#NDS32_002dChars" rel="prev" title="NDS32-Chars">
<style type="text/css">
<!--
a.summary-letter {text-decoration: none}
blockquote.indentedblock {margin-right: 0em}
blockquote.smallindentedblock {margin-right: 0em; font-size: smaller}
blockquote.smallquotation {font-size: smaller}
div.display {margin-left: 3.2em}
div.example {margin-left: 3.2em}
div.lisp {margin-left: 3.2em}
div.smalldisplay {margin-left: 3.2em}
div.smallexample {margin-left: 3.2em}
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.nolinebreak {white-space: nowrap}
span.roman {font-family: initial; font-weight: normal}
span.sansserif {font-family: sans-serif; font-weight: normal}
ul.no-bullet {list-style: none}
-->
</style>


</head>

<body lang="en">
<a name="NDS32_002dRegs"></a>
<div class="header">
<p>
Next: <a href="NDS32_002dOps.html#NDS32_002dOps" accesskey="n" rel="next">NDS32-Ops</a>, Previous: <a href="NDS32_002dChars.html#NDS32_002dChars" accesskey="p" rel="prev">NDS32-Chars</a>, Up: <a href="NDS32-Syntax.html#NDS32-Syntax" accesskey="u" rel="up">NDS32 Syntax</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>
</div>
<hr>
<a name="Register-Names-13"></a>
<h4 class="subsubsection">9.30.2.2 Register Names</h4>
<dl compact="compact">
<dt><code>General purpose registers (GPR)</code></dt>
<dd><p>There are 32 32-bit general purpose registers $r0 to $r31.
</p>
</dd>
<dt><code>Accumulators d0 and d1</code></dt>
<dd><p>64-bit accumulators: $d0.hi, $d0.lo, $d1.hi, and $d1.lo.
</p>
</dd>
<dt><code>Assembler reserved register $ta</code></dt>
<dd><p>Register $ta ($r15) is reserved for assembler using.
</p>
</dd>
<dt><code>Operating system reserved registers $p0 and $p1</code></dt>
<dd><p>Registers $p0 ($r26) and $p1 ($r27) are used by operating system as scratch
registers.
</p>
</dd>
<dt><code>Frame pointer $fp</code></dt>
<dd><p>Register $r28 is regarded as the frame pointer.
</p>
</dd>
<dt><code>Global pointer</code></dt>
<dd><p>Register $r29 is regarded as the global pointer.
</p>
</dd>
<dt><code>Link pointer</code></dt>
<dd><p>Register $r30 is regarded as the link pointer.
</p>
</dd>
<dt><code>Stack pointer</code></dt>
<dd><p>Register $r31 is regarded as the stack pointer.
</p></dd>
</dl>


</body>
</html>