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.
159 lines
6.3 KiB
HTML
159 lines
6.3 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) 1991-2019 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 6.4, http://www.gnu.org/software/texinfo/ -->
|
|
<head>
|
|
<title>MSP430-Ext (Using as)</title>
|
|
|
|
<meta name="description" content="MSP430-Ext (Using as)">
|
|
<meta name="keywords" content="MSP430-Ext (Using as)">
|
|
<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="MSP430-Syntax.html#MSP430-Syntax" rel="up" title="MSP430 Syntax">
|
|
<link href="MSP430-Floating-Point.html#MSP430-Floating-Point" rel="next" title="MSP430 Floating Point">
|
|
<link href="MSP430_002dRegs.html#MSP430_002dRegs" rel="prev" title="MSP430-Regs">
|
|
<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="MSP430_002dExt"></a>
|
|
<div class="header">
|
|
<p>
|
|
Previous: <a href="MSP430_002dRegs.html#MSP430_002dRegs" accesskey="p" rel="prev">MSP430-Regs</a>, Up: <a href="MSP430-Syntax.html#MSP430-Syntax" accesskey="u" rel="up">MSP430 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="Assembler-Extensions"></a>
|
|
<h4 class="subsubsection">9.28.2.4 Assembler Extensions</h4>
|
|
<a name="index-MSP430-Assembler-Extensions"></a>
|
|
|
|
<dl compact="compact">
|
|
<dt><code>@rN</code></dt>
|
|
<dd><p>As destination operand being treated as ‘<samp>0(rn)</samp>’
|
|
</p>
|
|
</dd>
|
|
<dt><code>0(rN)</code></dt>
|
|
<dd><p>As source operand being treated as ‘<samp>@rn</samp>’
|
|
</p>
|
|
</dd>
|
|
<dt><code>jCOND +N</code></dt>
|
|
<dd><p>Skips next N bytes followed by jump instruction and equivalent to
|
|
‘<samp>jCOND $+N+2</samp>’
|
|
</p>
|
|
</dd>
|
|
</dl>
|
|
|
|
<p>Also, there are some instructions, which cannot be found in other assemblers.
|
|
These are branch instructions, which has different opcodes upon jump distance.
|
|
They all got PC relative addressing mode.
|
|
</p>
|
|
<dl compact="compact">
|
|
<dt><code>beq label</code></dt>
|
|
<dd><p>A polymorph instruction which is ‘<samp>jeq label</samp>’ in case if jump distance
|
|
within allowed range for cpu’s jump instruction. If not, this unrolls into
|
|
a sequence of
|
|
</p><div class="smallexample">
|
|
<pre class="smallexample"> jne $+6
|
|
br label
|
|
</pre></div>
|
|
|
|
</dd>
|
|
<dt><code>bne label</code></dt>
|
|
<dd><p>A polymorph instruction which is ‘<samp>jne label</samp>’ or ‘<samp>jeq +4; br label</samp>’
|
|
</p>
|
|
</dd>
|
|
<dt><code>blt label</code></dt>
|
|
<dd><p>A polymorph instruction which is ‘<samp>jl label</samp>’ or ‘<samp>jge +4; br label</samp>’
|
|
</p>
|
|
</dd>
|
|
<dt><code>bltn label</code></dt>
|
|
<dd><p>A polymorph instruction which is ‘<samp>jn label</samp>’ or ‘<samp>jn +2; jmp +4; br label</samp>’
|
|
</p>
|
|
</dd>
|
|
<dt><code>bltu label</code></dt>
|
|
<dd><p>A polymorph instruction which is ‘<samp>jlo label</samp>’ or ‘<samp>jhs +2; br label</samp>’
|
|
</p>
|
|
</dd>
|
|
<dt><code>bge label</code></dt>
|
|
<dd><p>A polymorph instruction which is ‘<samp>jge label</samp>’ or ‘<samp>jl +4; br label</samp>’
|
|
</p>
|
|
</dd>
|
|
<dt><code>bgeu label</code></dt>
|
|
<dd><p>A polymorph instruction which is ‘<samp>jhs label</samp>’ or ‘<samp>jlo +4; br label</samp>’
|
|
</p>
|
|
</dd>
|
|
<dt><code>bgt label</code></dt>
|
|
<dd><p>A polymorph instruction which is ‘<samp>jeq +2; jge label</samp>’ or ‘<samp>jeq +6; jl +4; br label</samp>’
|
|
</p>
|
|
</dd>
|
|
<dt><code>bgtu label</code></dt>
|
|
<dd><p>A polymorph instruction which is ‘<samp>jeq +2; jhs label</samp>’ or ‘<samp>jeq +6; jlo +4; br label</samp>’
|
|
</p>
|
|
</dd>
|
|
<dt><code>bleu label</code></dt>
|
|
<dd><p>A polymorph instruction which is ‘<samp>jeq label; jlo label</samp>’ or ‘<samp>jeq +2; jhs +4; br label</samp>’
|
|
</p>
|
|
</dd>
|
|
<dt><code>ble label</code></dt>
|
|
<dd><p>A polymorph instruction which is ‘<samp>jeq label; jl label</samp>’ or ‘<samp>jeq +2; jge +4; br label</samp>’
|
|
</p>
|
|
</dd>
|
|
<dt><code>jump label</code></dt>
|
|
<dd><p>A polymorph instruction which is ‘<samp>jmp label</samp>’ or ‘<samp>br label</samp>’
|
|
</p></dd>
|
|
</dl>
|
|
|
|
|
|
<hr>
|
|
<div class="header">
|
|
<p>
|
|
Previous: <a href="MSP430_002dRegs.html#MSP430_002dRegs" accesskey="p" rel="prev">MSP430-Regs</a>, Up: <a href="MSP430-Syntax.html#MSP430-Syntax" accesskey="u" rel="up">MSP430 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>
|
|
|
|
|
|
|
|
</body>
|
|
</html>
|