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| <title>Using as: Labels</title> |
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| Next: <a href="Setting-Symbols.html#Setting-Symbols" accesskey="n" rel="next">Setting Symbols</a>, Up: <a href="Symbols.html#Symbols" accesskey="u" rel="up">Symbols</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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| <a name="Labels-1"></a> |
| <h3 class="section">5.1 Labels</h3> |
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| <a name="index-labels"></a> |
| <p>A <em>label</em> is written as a symbol immediately followed by a colon |
| ‘<samp>:</samp>’. The symbol then represents the current value of the |
| active location counter, and is, for example, a suitable instruction |
| operand. You are warned if you use the same symbol to represent two |
| different locations: the first definition overrides any other |
| definitions. |
| </p> |
| <p>On the HPPA, the usual form for a label need not be immediately followed by a |
| colon, but instead must start in column zero. Only one label may be defined on |
| a single line. To work around this, the HPPA version of <code>as</code> also |
| provides a special directive <code>.label</code> for defining labels more flexibly. |
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