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123 lines
4.7 KiB
HTML
123 lines
4.7 KiB
HTML
4 years ago
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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) 1991-2019 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 6.4, http://www.gnu.org/software/texinfo/ -->
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<head>
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<title>Altmacro (Using as)</title>
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<meta name="description" content="Altmacro (Using as)">
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<meta name="keywords" content="Altmacro (Using as)">
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<meta name="resource-type" content="document">
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<meta name="distribution" content="global">
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<meta name="Generator" content="makeinfo">
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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="Pseudo-Ops.html#Pseudo-Ops" rel="up" title="Pseudo Ops">
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<link href="Ascii.html#Ascii" rel="next" title="Ascii">
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<link href="Align.html#Align" rel="prev" title="Align">
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<style type="text/css">
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<!--
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a.summary-letter {text-decoration: none}
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blockquote.indentedblock {margin-right: 0em}
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blockquote.smallindentedblock {margin-right: 0em; font-size: smaller}
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blockquote.smallquotation {font-size: smaller}
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div.display {margin-left: 3.2em}
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div.example {margin-left: 3.2em}
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div.lisp {margin-left: 3.2em}
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div.smalldisplay {margin-left: 3.2em}
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div.smallexample {margin-left: 3.2em}
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div.smalllisp {margin-left: 3.2em}
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kbd {font-style: oblique}
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pre.display {font-family: inherit}
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pre.format {font-family: inherit}
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pre.menu-comment {font-family: serif}
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pre.menu-preformatted {font-family: serif}
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pre.smalldisplay {font-family: inherit; font-size: smaller}
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pre.smallexample {font-size: smaller}
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pre.smallformat {font-family: inherit; font-size: smaller}
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pre.smalllisp {font-size: smaller}
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span.nolinebreak {white-space: nowrap}
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span.roman {font-family: initial; font-weight: normal}
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span.sansserif {font-family: sans-serif; font-weight: normal}
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ul.no-bullet {list-style: none}
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-->
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</style>
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</head>
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<body lang="en">
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<a name="Altmacro"></a>
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<div class="header">
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<p>
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Next: <a href="Ascii.html#Ascii" accesskey="n" rel="next">Ascii</a>, Previous: <a href="Align.html#Align" accesskey="p" rel="prev">Align</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>
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</div>
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<hr>
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<a name="g_t_002ealtmacro"></a>
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<h3 class="section">7.4 <code>.altmacro</code></h3>
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<p>Enable alternate macro mode, enabling:
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</p>
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<dl compact="compact">
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<dt><code>LOCAL <var>name</var> [ , … ]</code>
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<a name="index-LOCAL-name-_005b-_002c-_2026-_005d"></a>
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</dt>
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<dd><p>One additional directive, <code>LOCAL</code>, is available. It is used to
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generate a string replacement for each of the <var>name</var> arguments, and
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replace any instances of <var>name</var> in each macro expansion. The
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replacement string is unique in the assembly, and different for each
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separate macro expansion. <code>LOCAL</code> allows you to write macros that
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define symbols, without fear of conflict between separate macro expansions.
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</p>
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</dd>
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<dt><code>String delimiters</code>
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<a name="index-String-delimiters"></a>
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</dt>
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<dd><p>You can write strings delimited in these other ways besides
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<code>"<var>string</var>"</code>:
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</p>
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<dl compact="compact">
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<dt><code>'<var>string</var>'</code></dt>
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<dd><p>You can delimit strings with single-quote characters.
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</p>
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</dd>
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<dt><code><<var>string</var>></code></dt>
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<dd><p>You can delimit strings with matching angle brackets.
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</p></dd>
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</dl>
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</dd>
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<dt><code>single-character string escape</code>
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<a name="index-single_002dcharacter-string-escape"></a>
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</dt>
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<dd><p>To include any single character literally in a string (even if the
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character would otherwise have some special meaning), you can prefix the
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character with ‘<samp>!</samp>’ (an exclamation mark). For example, you can
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write ‘<samp><4.3 !> 5.4!!></samp>’ to get the literal text ‘<samp>4.3 > 5.4!</samp>’.
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</p>
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</dd>
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<dt><code>Expression results as strings</code>
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<a name="index-Expression-results-as-strings"></a>
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</dt>
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<dd><p>You can write ‘<samp>%<var>expr</var></samp>’ to evaluate the expression <var>expr</var>
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and use the result as a string.
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</p></dd>
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</dl>
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</body>
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</html>
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