113 lines
4.5 KiB
HTML
113 lines
4.5 KiB
HTML
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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
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<html>
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<!-- This file documents the GNU Assembler "as".
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Copyright (C) 1991-2016 Free Software Foundation, Inc.
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Permission is granted to copy, distribute and/or modify this document
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under the terms of the GNU Free Documentation License, Version 1.3
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or any later version published by the Free Software Foundation;
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with no Invariant Sections, with no Front-Cover Texts, and with no
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Back-Cover Texts. A copy of the license is included in the
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section entitled "GNU Free Documentation License".
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-->
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<!-- Created by GNU Texinfo 5.2, http://www.gnu.org/software/texinfo/ -->
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<head>
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<title>Using as: XStormy16 Opcodes</title>
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<meta name="description" content="Using as: XStormy16 Opcodes">
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<meta name="keywords" content="Using as: XStormy16 Opcodes">
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
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<link href="index.html#Top" rel="start" title="Top">
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<link href="AS-Index.html#AS-Index" rel="index" title="AS Index">
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<link href="index.html#SEC_Contents" rel="contents" title="Table of Contents">
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<link href="XSTORMY16_002dDependent.html#XSTORMY16_002dDependent" rel="up" title="XSTORMY16-Dependent">
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<link href="Xtensa_002dDependent.html#Xtensa_002dDependent" rel="next" title="Xtensa-Dependent">
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<link href="XStormy16-Directives.html#XStormy16-Directives" rel="prev" title="XStormy16 Directives">
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</style>
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</head>
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<body lang="en" bgcolor="#FFFFFF" text="#000000" link="#0000FF" vlink="#800080" alink="#FF0000">
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<a name="XStormy16-Opcodes"></a>
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<div class="header">
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<p>
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Previous: <a href="XStormy16-Directives.html#XStormy16-Directives" accesskey="p" rel="prev">XStormy16 Directives</a>, Up: <a href="XSTORMY16_002dDependent.html#XSTORMY16_002dDependent" accesskey="u" rel="up">XSTORMY16-Dependent</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>
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</div>
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<hr>
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<a name="XStormy16-Pseudo_002dOpcodes"></a>
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<h4 class="subsection">9.51.3 XStormy16 Pseudo-Opcodes</h4>
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<a name="index-XStormy16-pseudo_002dopcodes"></a>
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<a name="index-pseudo_002dopcodes-for-XStormy16"></a>
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<p><code>as</code> implements all the standard XStormy16 opcodes.
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</p>
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<p><code>as</code> also implements the following pseudo ops:
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</p>
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<dl compact="compact">
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<dd>
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<a name="index-_0040lo-pseudo_002dop_002c-XStormy16"></a>
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</dd>
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<dt><code>@lo()</code></dt>
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<dd><p>Computes the lower 16 bits of the given expression and stores it into
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the immediate operand field of the given instruction. For example:
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</p>
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<p>‘<samp>add r6, @lo(here - there)</samp>’
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</p>
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<p>computes the difference between the address of labels ’here’ and
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’there’, takes the lower 16 bits of this difference and adds it to
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register 6.
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</p>
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<a name="index-_0040hi-pseudo_002dop_002c-XStormy16"></a>
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</dd>
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<dt><code>@hi()</code></dt>
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<dd><p>Computes the higher 16 bits of the given expression and stores it into
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the immediate operand field of the given instruction. For example:
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</p>
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<p>‘<samp>addc r7, @hi(here - there)</samp>’
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</p>
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<p>computes the difference between the address of labels ’here’ and
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’there’, takes the upper 16 bits of this difference, shifts it down 16
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bits and then adds it, along with the carry bit, to the value in
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register 7.
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</p>
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</dd>
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</dl>
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</body>
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</html>
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