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98 lines
5.4 KiB
HTML
98 lines
5.4 KiB
HTML
4 years ago
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<title>Nios II Directives - Using as</title>
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<meta name="description" content="Using as">
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<meta name="generator" content="makeinfo 4.13">
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<link title="Top" rel="start" href="index.html#Top">
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<link rel="up" href="NiosII_002dDependent.html#NiosII_002dDependent" title="NiosII-Dependent">
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<link rel="prev" href="Nios-II-Relocations.html#Nios-II-Relocations" title="Nios II Relocations">
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<link rel="next" href="Nios-II-Opcodes.html#Nios-II-Opcodes" title="Nios II Opcodes">
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<link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage">
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<!--
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This file documents the GNU Assembler "as".
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Copyright (C) 1991-2015 Free Software Foundation, Inc.
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Permission is granted to copy, distribute and/or modify this document
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under the terms of the GNU Free Documentation License, Version 1.3
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or any later version published by the Free Software Foundation;
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with no Invariant Sections, with no Front-Cover Texts, and with no
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Back-Cover Texts. A copy of the license is included in the
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section entitled ``GNU Free Documentation License''.
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</head>
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<body>
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<div class="node">
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<a name="Nios-II-Directives"></a>
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<p>
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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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<hr>
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</div>
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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-1696"></a><a name="index-Nios-II-machine-directives-1697"></a>
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<a name="index-g_t_0040code_007balign_007d-directive_002c-Nios-II-1698"></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-1699"></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-1700"></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-1701"></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-1702"></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-1703"></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-1704"></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-1705"></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-1706"></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-1707"></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-1708"></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-1709"></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-1710"></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-1711"></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-1712"></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-1713"></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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</body></html>
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