113 lines
4.3 KiB
HTML
113 lines
4.3 KiB
HTML
<!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) 1991-2016 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: SH-Regs</title>
|
|
|
|
<meta name="description" content="Using as: SH-Regs">
|
|
<meta name="keywords" content="Using as: SH-Regs">
|
|
<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="SH-Syntax.html#SH-Syntax" rel="up" title="SH Syntax">
|
|
<link href="SH_002dAddressing.html#SH_002dAddressing" rel="next" title="SH-Addressing">
|
|
<link href="SH_002dChars.html#SH_002dChars" rel="prev" title="SH-Chars">
|
|
<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="SH_002dRegs"></a>
|
|
<div class="header">
|
|
<p>
|
|
Next: <a href="SH_002dAddressing.html#SH_002dAddressing" accesskey="n" rel="next">SH-Addressing</a>, Previous: <a href="SH_002dChars.html#SH_002dChars" accesskey="p" rel="prev">SH-Chars</a>, Up: <a href="SH-Syntax.html#SH-Syntax" accesskey="u" rel="up">SH Syntax</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="Register-Names-13"></a>
|
|
<h4 class="subsubsection">9.40.2.2 Register Names</h4>
|
|
|
|
<a name="index-SH-registers"></a>
|
|
<a name="index-registers_002c-SH"></a>
|
|
<p>You can use the predefined symbols ‘<samp>r0</samp>’, ‘<samp>r1</samp>’, ‘<samp>r2</samp>’,
|
|
‘<samp>r3</samp>’, ‘<samp>r4</samp>’, ‘<samp>r5</samp>’, ‘<samp>r6</samp>’, ‘<samp>r7</samp>’, ‘<samp>r8</samp>’,
|
|
‘<samp>r9</samp>’, ‘<samp>r10</samp>’, ‘<samp>r11</samp>’, ‘<samp>r12</samp>’, ‘<samp>r13</samp>’, ‘<samp>r14</samp>’,
|
|
and ‘<samp>r15</samp>’ to refer to the SH registers.
|
|
</p>
|
|
<p>The SH also has these control registers:
|
|
</p>
|
|
<dl compact="compact">
|
|
<dt><code>pr</code></dt>
|
|
<dd><p>procedure register (holds return address)
|
|
</p>
|
|
</dd>
|
|
<dt><code>pc</code></dt>
|
|
<dd><p>program counter
|
|
</p>
|
|
</dd>
|
|
<dt><code>mach</code></dt>
|
|
<dt><code>macl</code></dt>
|
|
<dd><p>high and low multiply accumulator registers
|
|
</p>
|
|
</dd>
|
|
<dt><code>sr</code></dt>
|
|
<dd><p>status register
|
|
</p>
|
|
</dd>
|
|
<dt><code>gbr</code></dt>
|
|
<dd><p>global base register
|
|
</p>
|
|
</dd>
|
|
<dt><code>vbr</code></dt>
|
|
<dd><p>vector base register (for interrupt vectors)
|
|
</p></dd>
|
|
</dl>
|
|
|
|
|
|
|
|
|
|
</body>
|
|
</html>
|