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105 lines
4.3 KiB
HTML
105 lines
4.3 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>Arguments (Using as)</title>
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<meta name="description" content="Arguments (Using as)">
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<meta name="keywords" content="Arguments (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="Integer-Exprs.html#Integer-Exprs" rel="up" title="Integer Exprs">
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<link href="Operators.html#Operators" rel="next" title="Operators">
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<link href="Integer-Exprs.html#Integer-Exprs" rel="prev" title="Integer Exprs">
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<style type="text/css">
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a.summary-letter {text-decoration: none}
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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="Arguments"></a>
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<div class="header">
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<p>
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Next: <a href="Operators.html#Operators" accesskey="n" rel="next">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>
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</div>
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<hr>
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<a name="Arguments-1"></a>
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<h4 class="subsection">6.2.1 Arguments</h4>
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<a name="index-expression-arguments"></a>
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<a name="index-arguments-in-expressions"></a>
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<a name="index-operands-in-expressions"></a>
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<a name="index-arithmetic-operands"></a>
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<p><em>Arguments</em> are symbols, numbers or subexpressions. In other
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contexts arguments are sometimes called “arithmetic operands”. In
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this manual, to avoid confusing them with the “instruction operands” of
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the machine language, we use the term “argument” to refer to parts of
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expressions only, reserving the word “operand” to refer only to machine
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instruction operands.
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</p>
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<p>Symbols are evaluated to yield {<var>section</var> <var>NNN</var>} where
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<var>section</var> is one of text, data, bss, absolute,
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or undefined. <var>NNN</var> is a signed, 2’s complement 32 bit
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integer.
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</p>
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<p>Numbers are usually integers.
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</p>
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<p>A number can be a flonum or bignum. In this case, you are warned
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that only the low order 32 bits are used, and <code>as</code> pretends
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these 32 bits are an integer. You may write integer-manipulating
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instructions that act on exotic constants, compatible with other
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assemblers.
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</p>
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<a name="index-subexpressions"></a>
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<p>Subexpressions are a left parenthesis ‘<samp>(</samp>’ followed by an integer
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expression, followed by a right parenthesis ‘<samp>)</samp>’; or a prefix
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operator followed by an argument.
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</p>
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</body>
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</html>
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