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105 lines
5.4 KiB
HTML
105 lines
5.4 KiB
HTML
15 years ago
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<html lang="en">
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<head>
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<title>CRIS-Pseudos - Using as</title>
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<meta http-equiv="Content-Type" content="text/html">
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<meta name="description" content="Using as">
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<meta name="generator" content="makeinfo 4.7">
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<link title="Top" rel="start" href="index.html#Top">
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<link rel="up" href="CRIS_002dSyntax.html#CRIS_002dSyntax" title="CRIS-Syntax">
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<link rel="prev" href="CRIS_002dRegs.html#CRIS_002dRegs" title="CRIS-Regs">
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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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man end-->
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<meta http-equiv="Content-Style-Type" content="text/css">
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<style type="text/css"><!--
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pre.display { font-family:inherit }
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pre.format { font-family:inherit }
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pre.smalllisp { font-size:smaller }
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span.sc { font-variant:small-caps }
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span.roman { font-family: serif; font-weight: normal; }
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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="CRIS_002dPseudos"></a>Previous: <a rel="previous" accesskey="p" href="CRIS_002dRegs.html#CRIS_002dRegs">CRIS-Regs</a>,
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Up: <a rel="up" accesskey="u" href="CRIS_002dSyntax.html#CRIS_002dSyntax">CRIS-Syntax</a>
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<hr><br>
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</div>
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<h5 class="subsubsection">9.7.4.4 Assembler Directives</h5>
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<p><a name="index-assembler-directives_002c-CRIS-706"></a><a name="index-pseudo_002dops_002c-CRIS-707"></a><a name="index-CRIS-assembler-directives-708"></a><a name="index-CRIS-pseudo_002dops-709"></a>
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There are a few CRIS-specific pseudo-directives in addition to
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the generic ones. See <a href="Pseudo-Ops.html#Pseudo-Ops">Pseudo Ops</a>. Constants emitted by
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pseudo-directives are in little-endian order for CRIS. There is
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no support for floating-point-specific directives for CRIS.
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<dl>
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<dt><code>.dword EXPRESSIONS</code><dd><a name="index-assembler-directive-_002edword_002c-CRIS-710"></a><a name="index-pseudo_002dop-_002edword_002c-CRIS-711"></a><a name="index-CRIS-assembler-directive-_002edword-712"></a><a name="index-CRIS-pseudo_002dop-_002edword-713"></a>
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The <code>.dword</code> directive is a synonym for <code>.int</code>,
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expecting zero or more EXPRESSIONS, separated by commas. For
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each expression, a 32-bit little-endian constant is emitted.
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<br><dt><code>.syntax ARGUMENT</code><dd><a name="index-assembler-directive-_002esyntax_002c-CRIS-714"></a><a name="index-pseudo_002dop-_002esyntax_002c-CRIS-715"></a><a name="index-CRIS-assembler-directive-_002esyntax-716"></a><a name="index-CRIS-pseudo_002dop-_002esyntax-717"></a>The <code>.syntax</code> directive takes as <var>ARGUMENT</var> one of the
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following case-sensitive choices.
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<dl>
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<dt><code>no_register_prefix</code><dd>
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The <code>.syntax no_register_prefix</code> <a name="crisnous"></a>directive
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makes a <span class="samp">$</span> character prefix on all registers optional. It
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overrides a previous setting, including the corresponding effect
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of the option <span class="option">--no-underscore</span>. If this directive is
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used when ordinary symbols do not have a <span class="samp">_</span> character
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prefix, care must be taken to avoid ambiguities whether an
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operand is a register or a symbol; using symbols with names the
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same as general or special registers then invoke undefined
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behavior.
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<br><dt><code>register_prefix</code><dd>
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This directive makes a <span class="samp">$</span> character prefix on all
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registers mandatory. It overrides a previous setting, including
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the corresponding effect of the option <span class="option">--underscore</span>.
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<br><dt><code>leading_underscore</code><dd>
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This is an assertion directive, emitting an error if the
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<span class="option">--no-underscore</span> option is in effect.
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<br><dt><code>no_leading_underscore</code><dd>
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This is the opposite of the <code>.syntax leading_underscore</code>
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directive and emits an error if the option <span class="option">--underscore</span>
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is in effect.
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</dl>
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<br><dt><code>.arch ARGUMENT</code><dd><a name="index-assembler-directive-_002earch_002c-CRIS-718"></a><a name="index-pseudo_002dop-_002earch_002c-CRIS-719"></a><a name="index-CRIS-assembler-directive-_002earch-720"></a><a name="index-CRIS-pseudo_002dop-_002earch-721"></a>This is an assertion directive, giving an error if the specified
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<var>ARGUMENT</var> is not the same as the specified or default value
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for the <span class="option">--march=</span><var>architecture</var> option
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(see <a href="march_002doption.html#march_002doption">march-option</a>).
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<!-- If you compare with md_pseudo_table, you see that we don't -->
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<!-- document ".file" and ".loc" here. This is because we're just -->
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<!-- wrapping the corresponding ELF function and emitting an error for -->
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<!-- a.out. -->
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</dl>
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<!-- Copyright 1996, 2000, 2002 Free Software Foundation, Inc. -->
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<!-- This is part of the GAS manual. -->
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<!-- For copying conditions, see the file as.texinfo. -->
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</body></html>
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