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<title>Using as: Sparc-Directives</title>
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<a name="Sparc_002dDirectives"></a>
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<div class="header">
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<p>
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Previous: <a href="Sparc_002dFloat.html#Sparc_002dFloat" accesskey="p" rel="previous">Sparc-Float</a>, Up: <a href="Sparc_002dDependent.html#Sparc_002dDependent" accesskey="u" rel="up">Sparc-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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<hr>
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<a name="Sparc-Machine-Directives"></a>
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<h4 class="subsection">9.44.5 Sparc Machine Directives</h4>
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<a name="index-SPARC-machine-directives"></a>
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<a name="index-machine-directives_002c-SPARC"></a>
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<p>The Sparc version of <code>as</code> supports the following additional
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machine directives:
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</p>
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<dl compact="compact">
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<dd><a name="index-align-directive_002c-SPARC"></a>
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</dd>
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<dt><code>.align</code></dt>
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<dd><p>This must be followed by the desired alignment in bytes.
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</p>
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<a name="index-common-directive_002c-SPARC"></a>
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</dd>
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<dt><code>.common</code></dt>
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<dd><p>This must be followed by a symbol name, a positive number, and
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<code>"bss"</code>. This behaves somewhat like <code>.comm</code>, but the
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syntax is different.
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</p>
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<a name="index-half-directive_002c-SPARC"></a>
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</dd>
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<dt><code>.half</code></dt>
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<dd><p>This is functionally identical to <code>.short</code>.
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</p>
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<a name="index-nword-directive_002c-SPARC"></a>
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</dd>
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<dt><code>.nword</code></dt>
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<dd><p>On the Sparc, the <code>.nword</code> directive produces native word sized value,
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ie. if assembling with -32 it is equivalent to <code>.word</code>, if assembling
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with -64 it is equivalent to <code>.xword</code>.
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</p>
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<a name="index-proc-directive_002c-SPARC"></a>
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</dd>
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<dt><code>.proc</code></dt>
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<dd><p>This directive is ignored. Any text following it on the same
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line is also ignored.
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</p>
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<a name="index-register-directive_002c-SPARC"></a>
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</dd>
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<dt><code>.register</code></dt>
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<dd><p>This directive declares use of a global application or system register.
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It must be followed by a register name %g2, %g3, %g6 or %g7, comma and
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the symbol name for that register. If symbol name is <code>#scratch</code>,
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it is a scratch register, if it is <code>#ignore</code>, it just suppresses any
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errors about using undeclared global register, but does not emit any
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information about it into the object file. This can be useful e.g. if you
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save the register before use and restore it after.
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</p>
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<a name="index-reserve-directive_002c-SPARC"></a>
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</dd>
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<dt><code>.reserve</code></dt>
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<dd><p>This must be followed by a symbol name, a positive number, and
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<code>"bss"</code>. This behaves somewhat like <code>.lcomm</code>, but the
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syntax is different.
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</p>
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<a name="index-seg-directive_002c-SPARC"></a>
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</dd>
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<dt><code>.seg</code></dt>
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<dd><p>This must be followed by <code>"text"</code>, <code>"data"</code>, or
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<code>"data1"</code>. It behaves like <code>.text</code>, <code>.data</code>, or
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<code>.data 1</code>.
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</p>
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<a name="index-skip-directive_002c-SPARC"></a>
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</dd>
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<dt><code>.skip</code></dt>
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<dd><p>This is functionally identical to the <code>.space</code> directive.
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</p>
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<a name="index-word-directive_002c-SPARC"></a>
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</dd>
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<dt><code>.word</code></dt>
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<dd><p>On the Sparc, the <code>.word</code> directive produces 32 bit values,
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instead of the 16 bit values it produces on many other machines.
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</p>
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<a name="index-xword-directive_002c-SPARC"></a>
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</dd>
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<dt><code>.xword</code></dt>
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<dd><p>On the Sparc V9 processor, the <code>.xword</code> directive produces
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64 bit values.
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</p></dd>
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</dl>
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<hr>
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<div class="header">
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<p>
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Previous: <a href="Sparc_002dFloat.html#Sparc_002dFloat" accesskey="p" rel="previous">Sparc-Float</a>, Up: <a href="Sparc_002dDependent.html#Sparc_002dDependent" accesskey="u" rel="up">Sparc-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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