75 lines
3.1 KiB
HTML
75 lines
3.1 KiB
HTML
<html lang="en">
|
|
<head>
|
|
<title>SH64-Addressing - Using as</title>
|
|
<meta http-equiv="Content-Type" content="text/html">
|
|
<meta name="description" content="Using as">
|
|
<meta name="generator" content="makeinfo 4.7">
|
|
<link title="Top" rel="start" href="index.html#Top">
|
|
<link rel="up" href="SH64-Syntax.html#SH64-Syntax" title="SH64 Syntax">
|
|
<link rel="prev" href="SH64_002dRegs.html#SH64_002dRegs" title="SH64-Regs">
|
|
<link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
|
|
<!--
|
|
This file documents the GNU Assembler "as".
|
|
|
|
Copyright (C) 1991, 92, 93, 94, 95, 96, 97, 98, 99, 2000, 2001, 2002,
|
|
2006, 2007 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 1.1
|
|
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''.
|
|
|
|
man end-->
|
|
<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; }
|
|
--></style>
|
|
</head>
|
|
<body>
|
|
<div class="node">
|
|
<p>
|
|
<a name="SH64_002dAddressing"></a>Previous: <a rel="previous" accesskey="p" href="SH64_002dRegs.html#SH64_002dRegs">SH64-Regs</a>,
|
|
Up: <a rel="up" accesskey="u" href="SH64-Syntax.html#SH64-Syntax">SH64 Syntax</a>
|
|
<hr><br>
|
|
</div>
|
|
|
|
<h5 class="subsubsection">9.29.2.3 Addressing Modes</h5>
|
|
|
|
<p><a name="index-addressing-modes_002c-SH64-1483"></a><a name="index-SH64-addressing-modes-1484"></a>
|
|
SH64 operands consist of either a register or immediate value. The
|
|
immediate value can be a constant or label reference (or portion of a
|
|
label reference), as in this example:
|
|
|
|
<pre class="example"> movi 4,r2
|
|
pt function, tr4
|
|
movi (function >> 16) & 65535,r0
|
|
shori function & 65535, r0
|
|
ld.l r0,4,r0
|
|
</pre>
|
|
<p><a name="index-datalabel_002c-SH64-1485"></a>Instruction label references can reference labels in either SHmedia or
|
|
SHcompact. To differentiate between the two, labels in SHmedia sections
|
|
will always have the least significant bit set (i.e. they will be odd),
|
|
which SHcompact labels will have the least significant bit reset
|
|
(i.e. they will be even). If you need to reference the actual address
|
|
of a label, you can use the <code>datalabel</code> modifier, as in this
|
|
example:
|
|
|
|
<pre class="example"> .long function
|
|
.long datalabel function
|
|
</pre>
|
|
<p>In that example, the first longword may or may not have the least
|
|
significant bit set depending on whether the label is an SHmedia label
|
|
or an SHcompact label. The second longword will be the actual address
|
|
of the label, regardless of what type of label it is.
|
|
|
|
</body></html>
|
|
|