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66Next: <a href="HPPA-Floating-Point.html#HPPA-Floating-Point" accesskey="n" rel="next">HPPA Floating Point</a>, Previous: <a href="HPPA-Options.html#HPPA-Options" accesskey="p" rel="previous">HPPA Options</a>, Up: <a href="HPPA_002dDependent.html#HPPA_002dDependent" accesskey="u" rel="up">HPPA-Dependent</a> &nbsp; [<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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69<a name="Syntax-14"></a>
70<h4 class="subsection">9.15.3 Syntax</h4>
71<p>The assembler syntax closely follows the HPPA instruction set
72reference manual; assembler directives and general syntax closely follow the
73HPPA assembly language reference manual, with a few noteworthy differences.
74</p>
75<p>First, a colon may immediately follow a label definition.  This is
76simply for compatibility with how most assembly language programmers
77write code.
78</p>
79<p>Some obscure expression parsing problems may affect hand written code which
80uses the <code>spop</code> instructions, or code which makes significant
81use of the <code>!</code> line separator.
82</p>
83<p><code>as</code> is much less forgiving about missing arguments and other
84similar oversights than the HP assembler.  <code>as</code> notifies you
85of missing arguments as syntax errors; this is regarded as a feature, not a
86bug.
87</p>
88<p>Finally, <code>as</code> allows you to use an external symbol without
89explicitly importing the symbol.  <em>Warning:</em> in the future this will be
90an error for HPPA targets.
91</p>
92<p>Special characters for HPPA targets include:
93</p>
94<p>&lsquo;<samp>;</samp>&rsquo; is the line comment character.
95</p>
96<p>&lsquo;<samp>!</samp>&rsquo; can be used instead of a newline to separate statements.
97</p>
98<p>Since &lsquo;<samp>$</samp>&rsquo; has no special meaning, you may use it in symbol names.
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