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<title>Nios II Directives - Using as</title>
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<a name="Nios-II-Directives"></a>
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Next: <a rel="next" accesskey="n" href="Nios-II-Opcodes.html#Nios-II-Opcodes">Nios II Opcodes</a>,
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Previous: <a rel="previous" accesskey="p" href="Nios-II-Relocations.html#Nios-II-Relocations">Nios II Relocations</a>,
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Up: <a rel="up" accesskey="u" href="NiosII_002dDependent.html#NiosII_002dDependent">NiosII-Dependent</a>
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<h4 class="subsection">9.31.4 Nios II Machine Directives</h4>
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<p><a name="index-machine-directives_002c-Nios-II-1804"></a><a name="index-Nios-II-machine-directives-1805"></a>
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<a name="index-g_t_0040code_007balign_007d-directive_002c-Nios-II-1806"></a>
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<dl><dt><code>.align </code><var>expression</var><code> [, </code><var>expression</var><code>]</code><dd>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><a name="index-g_t_0040code_007bhalf_007d-directive_002c-Nios-II-1807"></a><br><dt><code>.half </code><var>expression</var><dd>Create an aligned constant 2 bytes in size.
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<p><a name="index-g_t_0040code_007bword_007d-directive_002c-Nios-II-1808"></a><br><dt><code>.word </code><var>expression</var><dd>Create an aligned constant 4 bytes in size.
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<p><a name="index-g_t_0040code_007bdword_007d-directive_002c-Nios-II-1809"></a><br><dt><code>.dword </code><var>expression</var><dd>Create an aligned constant 8 bytes in size.
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<p><a name="index-g_t_0040code_007b2byte_007d-directive_002c-Nios-II-1810"></a><br><dt><code>.2byte </code><var>expression</var><dd>Create an unaligned constant 2 bytes in size.
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<p><a name="index-g_t_0040code_007b4byte_007d-directive_002c-Nios-II-1811"></a><br><dt><code>.4byte </code><var>expression</var><dd>Create an unaligned constant 4 bytes in size.
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<p><a name="index-g_t_0040code_007b8byte_007d-directive_002c-Nios-II-1812"></a><br><dt><code>.8byte </code><var>expression</var><dd>Create an unaligned constant 8 bytes in size.
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<p><a name="index-g_t_0040code_007b16byte_007d-directive_002c-Nios-II-1813"></a><br><dt><code>.16byte </code><var>expression</var><dd>Create an unaligned constant 16 bytes in size.
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<p><a name="index-g_t_0040code_007bset-noat_007d-directive_002c-Nios-II-1814"></a><br><dt><code>.set noat</code><dd>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><a name="index-g_t_0040code_007bset-at_007d-directive_002c-Nios-II-1815"></a><br><dt><code>.set at</code><dd>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><a name="index-g_t_0040code_007bset-nobreak_007d-directive_002c-Nios-II-1816"></a><br><dt><code>.set nobreak</code><dd>Allows assembly code to use <code>ba</code> and <code>bt</code>
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registers without warning.
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<p><a name="index-g_t_0040code_007bset-break_007d-directive_002c-Nios-II-1817"></a><br><dt><code>.set break</code><dd>Turns warnings back on for using <code>ba</code> and <code>bt</code>
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registers.
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<p><a name="index-g_t_0040code_007bset-norelax_007d-directive_002c-Nios-II-1818"></a><br><dt><code>.set norelax</code><dd>Do not replace any branches or calls.
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<p><a name="index-g_t_0040code_007bset-relaxsection_007d-directive_002c-Nios-II-1819"></a><br><dt><code>.set relaxsection</code><dd>Replace identified out-of-range branches with
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<code>jmp</code> sequences (default).
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<p><a name="index-g_t_0040code_007bset-relaxall_007d-directive_002c-Nios-II-1820"></a><br><dt><code>.set relaxsection</code><dd>Replace all branch and call instructions with
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<code>jmp</code> and <code>callr</code> sequences.
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<p><a name="index-g_t_0040code_007bset_007d-directive_002c-Nios-II-1821"></a><br><dt><code>.set ...</code><dd>All other <code>.set</code> are the normal use.
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</dl>
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