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62 lines
2.6 KiB
HTML
62 lines
2.6 KiB
HTML
4 years ago
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<html lang="en">
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<head>
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<title>Labels - Using as</title>
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<meta http-equiv="Content-Type" content="text/html">
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<meta name="description" content="Using as">
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<meta name="generator" content="makeinfo 4.13">
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<link title="Top" rel="start" href="index.html#Top">
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<link rel="up" href="Symbols.html#Symbols" title="Symbols">
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<link rel="next" href="Setting-Symbols.html#Setting-Symbols" title="Setting Symbols">
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<link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
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<!--
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This file documents the GNU Assembler "as".
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Copyright (C) 1991-2015 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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<meta http-equiv="Content-Style-Type" content="text/css">
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<style type="text/css"><!--
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pre.display { font-family:inherit }
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pre.format { font-family:inherit }
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pre.smalldisplay { font-family:inherit; font-size:smaller }
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pre.smallformat { font-family:inherit; font-size:smaller }
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pre.smallexample { font-size:smaller }
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pre.smalllisp { font-size:smaller }
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span.sc { font-variant:small-caps }
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span.roman { font-family:serif; font-weight:normal; }
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span.sansserif { font-family:sans-serif; font-weight:normal; }
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--></style>
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</head>
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<body>
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<div class="node">
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<a name="Labels"></a>
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<p>
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Next: <a rel="next" accesskey="n" href="Setting-Symbols.html#Setting-Symbols">Setting Symbols</a>,
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Up: <a rel="up" accesskey="u" href="Symbols.html#Symbols">Symbols</a>
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<hr>
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</div>
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<h3 class="section">5.1 Labels</h3>
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<p><a name="index-labels-210"></a>A <dfn>label</dfn> is written as a symbol immediately followed by a colon
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‘<samp><span class="samp">:</span></samp>’. The symbol then represents the current value of the
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active location counter, and is, for example, a suitable instruction
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operand. You are warned if you use the same symbol to represent two
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different locations: the first definition overrides any other
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definitions.
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<p>On the HPPA, the usual form for a label need not be immediately followed by a
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colon, but instead must start in column zero. Only one label may be defined on
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a single line. To work around this, the HPPA version of <samp><span class="command">as</span></samp> also
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provides a special directive <code>.label</code> for defining labels more flexibly.
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</body></html>
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