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| Next: <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="prev">HPPA Options</a>, Up: <a href="HPPA_002dDependent.html#HPPA_002dDependent" accesskey="u" rel="up">HPPA-Dependent</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="Syntax-12"></a> |
| <h4 class="subsection">9.13.3 Syntax</h4> |
| <p>The assembler syntax closely follows the HPPA instruction set |
| reference manual; assembler directives and general syntax closely follow the |
| HPPA assembly language reference manual, with a few noteworthy differences. |
| </p> |
| <p>First, a colon may immediately follow a label definition. This is |
| simply for compatibility with how most assembly language programmers |
| write code. |
| </p> |
| <p>Some obscure expression parsing problems may affect hand written code which |
| uses the <code>spop</code> instructions, or code which makes significant |
| use of the <code>!</code> line separator. |
| </p> |
| <p><code>as</code> is much less forgiving about missing arguments and other |
| similar oversights than the HP assembler. <code>as</code> notifies you |
| of missing arguments as syntax errors; this is regarded as a feature, not a |
| bug. |
| </p> |
| <p>Finally, <code>as</code> allows you to use an external symbol without |
| explicitly importing the symbol. <em>Warning:</em> in the future this will be |
| an error for HPPA targets. |
| </p> |
| <p>Special characters for HPPA targets include: |
| </p> |
| <p>‘<samp>;</samp>’ is the line comment character. |
| </p> |
| <p>‘<samp>!</samp>’ can be used instead of a newline to separate statements. |
| </p> |
| <p>Since ‘<samp>$</samp>’ has no special meaning, you may use it in symbol names. |
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