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61 lines
2.8 KiB
HTML
61 lines
2.8 KiB
HTML
15 years ago
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<title>MIPS autoextend - Using as</title>
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<meta name="description" content="Using as">
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<link title="Top" rel="start" href="index.html#Top">
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<link rel="up" href="MIPS_002dDependent.html#MIPS_002dDependent" title="MIPS-Dependent">
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<link rel="prev" href="MIPS-symbol-sizes.html#MIPS-symbol-sizes" title="MIPS symbol sizes">
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<link rel="next" href="MIPS-insn.html#MIPS-insn" title="MIPS insn">
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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, 92, 93, 94, 95, 96, 97, 98, 99, 2000, 2001, 2002,
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2006, 2007 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 1.1
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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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--></style>
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</head>
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<body>
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<div class="node">
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<p>
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<a name="MIPS-autoextend"></a>Next: <a rel="next" accesskey="n" href="MIPS-insn.html#MIPS-insn">MIPS insn</a>,
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Previous: <a rel="previous" accesskey="p" href="MIPS-symbol-sizes.html#MIPS-symbol-sizes">MIPS symbol sizes</a>,
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Up: <a rel="up" accesskey="u" href="MIPS_002dDependent.html#MIPS_002dDependent">MIPS-Dependent</a>
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<hr><br>
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</div>
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<h4 class="subsection">9.22.6 Directives for extending MIPS 16 bit instructions</h4>
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<p><a name="index-_0040code_007b_002eset-autoextend_007d-1219"></a><a name="index-_0040code_007b_002eset-noautoextend_007d-1220"></a>By default, MIPS 16 instructions are automatically extended to 32 bits
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when necessary. The directive <code>.set noautoextend</code> will turn this
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off. When <code>.set noautoextend</code> is in effect, any 32 bit instruction
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must be explicitly extended with the <code>.e</code> modifier (e.g.,
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<code>li.e $4,1000</code>). The directive <code>.set autoextend</code> may be used
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to once again automatically extend instructions when necessary.
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<p>This directive is only meaningful when in MIPS 16 mode. Traditional
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<span class="sc">mips</span> assemblers do not support this directive.
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</body></html>
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