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<title>Using as: Nios II Directives</title>
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<a name="Nios-II-Directives"></a>
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<div class="header">
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<p>
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Next: <a href="Nios-II-Opcodes.html#Nios-II-Opcodes" accesskey="n" rel="next">Nios II Opcodes</a>, Previous: <a href="Nios-II-Relocations.html#Nios-II-Relocations" accesskey="p" rel="previous">Nios II Relocations</a>, Up: <a href="NiosII_002dDependent.html#NiosII_002dDependent" accesskey="u" rel="up">NiosII-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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</div>
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<hr>
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<a name="Nios-II-Machine-Directives"></a>
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<h4 class="subsection">9.31.4 Nios II Machine Directives</h4>
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<a name="index-machine-directives_002c-Nios-II"></a>
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<a name="index-Nios-II-machine-directives"></a>
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<dl compact="compact">
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<dd>
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<a name="index-align-directive_002c-Nios-II"></a>
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</dd>
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<dt><code>.align <var>expression</var> [, <var>expression</var>]</code></dt>
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<dd><p>This is the generic <code>.align</code> directive, however
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this aligns to a power of two.
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</p>
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<a name="index-half-directive_002c-Nios-II"></a>
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</dd>
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<dt><code>.half <var>expression</var></code></dt>
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<dd><p>Create an aligned constant 2 bytes in size.
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</p>
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<a name="index-word-directive_002c-Nios-II"></a>
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</dd>
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<dt><code>.word <var>expression</var></code></dt>
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<dd><p>Create an aligned constant 4 bytes in size.
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</p>
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<a name="index-dword-directive_002c-Nios-II"></a>
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</dd>
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<dt><code>.dword <var>expression</var></code></dt>
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<dd><p>Create an aligned constant 8 bytes in size.
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</p>
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<a name="index-2byte-directive_002c-Nios-II"></a>
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</dd>
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<dt><code>.2byte <var>expression</var></code></dt>
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<dd><p>Create an unaligned constant 2 bytes in size.
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</p>
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<a name="index-4byte-directive_002c-Nios-II"></a>
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</dd>
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<dt><code>.4byte <var>expression</var></code></dt>
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<dd><p>Create an unaligned constant 4 bytes in size.
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</p>
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<a name="index-8byte-directive_002c-Nios-II"></a>
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</dd>
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<dt><code>.8byte <var>expression</var></code></dt>
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<dd><p>Create an unaligned constant 8 bytes in size.
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</p>
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<a name="index-16byte-directive_002c-Nios-II"></a>
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</dd>
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<dt><code>.16byte <var>expression</var></code></dt>
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<dd><p>Create an unaligned constant 16 bytes in size.
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</p>
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<a name="index-set-noat-directive_002c-Nios-II"></a>
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</dd>
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<dt><code>.set noat</code></dt>
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<dd><p>Allows assembly code to use <code>at</code> register without
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warning. Macro or relaxation expansions
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generate warnings.
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</p>
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<a name="index-set-at-directive_002c-Nios-II"></a>
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</dd>
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<dt><code>.set at</code></dt>
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<dd><p>Assembly code using <code>at</code> register generates
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warnings, and macro expansion and relaxation are
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enabled.
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</p>
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<a name="index-set-nobreak-directive_002c-Nios-II"></a>
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</dd>
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<dt><code>.set nobreak</code></dt>
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<dd><p>Allows assembly code to use <code>ba</code> and <code>bt</code>
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registers without warning.
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</p>
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<a name="index-set-break-directive_002c-Nios-II"></a>
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</dd>
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<dt><code>.set break</code></dt>
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<dd><p>Turns warnings back on for using <code>ba</code> and <code>bt</code>
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registers.
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</p>
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<a name="index-set-norelax-directive_002c-Nios-II"></a>
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</dd>
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<dt><code>.set norelax</code></dt>
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<dd><p>Do not replace any branches or calls.
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</p>
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<a name="index-set-relaxsection-directive_002c-Nios-II"></a>
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</dd>
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<dt><code>.set relaxsection</code></dt>
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<dd><p>Replace identified out-of-range branches with
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<code>jmp</code> sequences (default).
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</p>
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<a name="index-set-relaxall-directive_002c-Nios-II"></a>
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</dd>
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<dt><code>.set relaxsection</code></dt>
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<dd><p>Replace all branch and call instructions with
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<code>jmp</code> and <code>callr</code> sequences.
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</p>
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<a name="index-set-directive_002c-Nios-II"></a>
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</dd>
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<dt><code>.set …</code></dt>
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<dd><p>All other <code>.set</code> are the normal use.
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</p>
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</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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Next: <a href="Nios-II-Opcodes.html#Nios-II-Opcodes" accesskey="n" rel="next">Nios II Opcodes</a>, Previous: <a href="Nios-II-Relocations.html#Nios-II-Relocations" accesskey="p" rel="previous">Nios II Relocations</a>, Up: <a href="NiosII_002dDependent.html#NiosII_002dDependent" accesskey="u" rel="up">NiosII-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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