1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950515253545556575859606162636465666768697071727374757677787980818283848586878889909192939495969798 |
- <!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) 1991-2017 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: Set</title>
- <meta name="description" content="Using as: Set">
- <meta name="keywords" content="Using as: Set">
- <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="Pseudo-Ops.html#Pseudo-Ops" rel="up" title="Pseudo Ops">
- <link href="Short.html#Short" rel="next" title="Short">
- <link href="Section.html#Section" rel="prev" title="Section">
- <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="Set"></a>
- <div class="header">
- <p>
- Next: <a href="Short.html#Short" accesskey="n" rel="next">Short</a>, Previous: <a href="Section.html#Section" accesskey="p" rel="prev">Section</a>, Up: <a href="Pseudo-Ops.html#Pseudo-Ops" accesskey="u" rel="up">Pseudo Ops</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="g_t_002eset-symbol_002c-expression"></a>
- <h3 class="section">7.79 <code>.set <var>symbol</var>, <var>expression</var></code></h3>
- <a name="index-set-directive"></a>
- <a name="index-symbol-value_002c-setting"></a>
- <p>Set the value of <var>symbol</var> to <var>expression</var>. This
- changes <var>symbol</var>’s value and type to conform to
- <var>expression</var>. If <var>symbol</var> was flagged as external, it remains
- flagged (see <a href="Symbol-Attributes.html#Symbol-Attributes">Symbol Attributes</a>).
- </p>
- <p>You may <code>.set</code> a symbol many times in the same assembly provided that the
- values given to the symbol are constants. Values that are based on expressions
- involving other symbols are allowed, but some targets may restrict this to only
- being done once per assembly. This is because those targets do not set the
- addresses of symbols at assembly time, but rather delay the assignment until a
- final link is performed. This allows the linker a chance to change the code in
- the files, changing the location of, and the relative distance between, various
- different symbols.
- </p>
- <p>If you <code>.set</code> a global symbol, the value stored in the object
- file is the last value stored into it.
- </p>
- <p>On Z80 <code>set</code> is a real instruction, use
- ‘<samp><var>symbol</var> defl <var>expression</var></samp>’ instead.
- </p>
- </body>
- </html>
|