<!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: Prefix Ops</title> <meta name="description" content="Using as: Prefix Ops"> <meta name="keywords" content="Using as: Prefix Ops"> <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="Integer-Exprs.html#Integer-Exprs" rel="up" title="Integer Exprs"> <link href="Infix-Ops.html#Infix-Ops" rel="next" title="Infix Ops"> <link href="Operators.html#Operators" rel="prev" title="Operators"> <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="Prefix-Ops"></a> <div class="header"> <p> Next: <a href="Infix-Ops.html#Infix-Ops" accesskey="n" rel="next">Infix Ops</a>, Previous: <a href="Operators.html#Operators" accesskey="p" rel="prev">Operators</a>, Up: <a href="Integer-Exprs.html#Integer-Exprs" accesskey="u" rel="up">Integer Exprs</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="Prefix-Operator"></a> <h4 class="subsection">6.2.3 Prefix Operator</h4> <a name="index-prefix-operators"></a> <p><code>as</code> has the following <em>prefix operators</em>. They each take one argument, which must be absolute. </p> <dl compact="compact"> <dt><code>-</code></dt> <dd><p><em>Negation</em>. Two’s complement negation. </p></dd> <dt><code>~</code></dt> <dd><p><em>Complementation</em>. Bitwise not. </p></dd> </dl> </body> </html>