<!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>D10V-Chars (Using as)</title>
<meta name="description" content="D10V-Chars (Using as)">
<meta name="keywords" content="D10V-Chars (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="D10V_002dSyntax.html#D10V_002dSyntax" rel="up" title="D10V-Syntax">
<link href="D10V_002dRegs.html#D10V_002dRegs" rel="next" title="D10V-Regs">
<link href="D10V_002dSubs.html#D10V_002dSubs" rel="prev" title="D10V-Subs">
<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="D10V_002dChars"></a>
<div class="header">
<p>
Next: <a href="D10V_002dRegs.html#D10V_002dRegs" accesskey="n" rel="next">D10V-Regs</a>, Previous: <a href="D10V_002dSubs.html#D10V_002dSubs" accesskey="p" rel="prev">D10V-Subs</a>, Up: <a href="D10V_002dSyntax.html#D10V_002dSyntax" accesskey="u" rel="up">D10V-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="Special-Characters-8"></a>
<h4 class="subsubsection">9.11.2.3 Special Characters</h4>
<a name="index-line-comment-character_002c-D10V"></a>
<a name="index-D10V-line-comment-character"></a>
<p>A semicolon (‘<samp>;</samp>’) can be used anywhere on a line to start a
comment that extends to the end of the line.
</p>
<p>If a ‘<samp>#</samp>’ appears as the first character of a line, the whole line
is treated as a comment, but in this case the line could also be a
logical line number directive (see <a href="Comments.html#Comments">Comments</a>) or a preprocessor
control command (see <a href="Preprocessing.html#Preprocessing">Preprocessing</a>).
</p>
<a name="index-sub_002dinstruction-ordering_002c-D10V"></a>
<a name="index-D10V-sub_002dinstruction-ordering"></a>
<p>Sub-instructions may be executed in order, in reverse-order, or in parallel.
Instructions listed in the standard one-per-line format will be executed sequentially.
To specify the executing order, use the following symbols:
</p><dl compact="compact">
<dt>‘<samp>-></samp>’</dt>
<dd><p>Sequential with instruction on the left first.
</p></dd>
<dt>‘<samp><-</samp>’</dt>
<dd><p>Sequential with instruction on the right first.
</p></dd>
<dt>‘<samp>||</samp>’</dt>
<dd><p>Parallel
</p></dd>
</dl>
<p>The D10V syntax allows either one instruction per line, one instruction per line with
the execution symbol, or two instructions per line. For example
</p><dl compact="compact">
<dt><code>abs a1 -> abs r0</code></dt>
<dd><p>Execute these sequentially. The instruction on the right is in the right
container and is executed second.
</p></dd>
<dt><code>abs r0 <- abs a1</code></dt>
<dd><p>Execute these reverse-sequentially. The instruction on the right is in the right
container, and is executed first.
</p></dd>
<dt><code>ld2w r2,@r8+ || mac a0,r0,r7</code></dt>
<dd><p>Execute these in parallel.
</p></dd>
<dt><code>ld2w r2,@r8+ ||</code></dt>
<dt><code>mac a0,r0,r7</code></dt>
<dd><p>Two-line format. Execute these in parallel.
</p></dd>
<dt><code>ld2w r2,@r8+</code></dt>
<dt><code>mac a0,r0,r7</code></dt>
<dd><p>Two-line format. Execute these sequentially. Assembler will
put them in the proper containers.
</p></dd>
<dt><code>ld2w r2,@r8+ -></code></dt>
<dt><code>mac a0,r0,r7</code></dt>
<dd><p>Two-line format. Execute these sequentially. Same as above but
second instruction will always go into right container.
</p></dd>
</dl>
<a name="index-symbol-names_002c-_0024-in"></a>
<a name="index-_0024-in-symbol-names"></a>
<p>Since ‘<samp>$</samp>’ has no special meaning, you may use it in symbol names.
</p>
<hr>
<div class="header">
<p>
Next: <a href="D10V_002dRegs.html#D10V_002dRegs" accesskey="n" rel="next">D10V-Regs</a>, Previous: <a href="D10V_002dSubs.html#D10V_002dSubs" accesskey="p" rel="prev">D10V-Subs</a>, Up: <a href="D10V_002dSyntax.html#D10V_002dSyntax" accesskey="u" rel="up">D10V-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>