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161 lines
6.4 KiB
HTML
161 lines
6.4 KiB
HTML
4 years ago
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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
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<html>
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<!-- This file documents the GNU Assembler "as".
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Copyright (C) 1991-2019 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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-->
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<!-- Created by GNU Texinfo 6.4, http://www.gnu.org/software/texinfo/ -->
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<head>
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<title>s390 Options (Using as)</title>
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<meta name="description" content="s390 Options (Using as)">
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<meta name="keywords" content="s390 Options (Using as)">
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<meta name="resource-type" content="document">
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<meta name="distribution" content="global">
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<meta name="Generator" content="makeinfo">
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
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<link href="index.html#Top" rel="start" title="Top">
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<link href="AS-Index.html#AS-Index" rel="index" title="AS Index">
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<link href="index.html#SEC_Contents" rel="contents" title="Table of Contents">
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<link href="S_002f390_002dDependent.html#S_002f390_002dDependent" rel="up" title="S/390-Dependent">
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<link href="s390-Characters.html#s390-Characters" rel="next" title="s390 Characters">
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<link href="S_002f390_002dDependent.html#S_002f390_002dDependent" rel="prev" title="S/390-Dependent">
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-->
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</style>
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</head>
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<body lang="en">
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<a name="s390-Options"></a>
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<div class="header">
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<p>
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Next: <a href="s390-Characters.html#s390-Characters" accesskey="n" rel="next">s390 Characters</a>, Up: <a href="S_002f390_002dDependent.html#S_002f390_002dDependent" accesskey="u" rel="up">S/390-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="Options-20"></a>
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<h4 class="subsection">9.40.1 Options</h4>
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<a name="index-options-for-s390"></a>
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<a name="index-s390-options"></a>
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<p>The following table lists all available s390 specific options:
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</p>
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<dl compact="compact">
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<dd><a name="index-_002dm31-option_002c-s390"></a>
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<a name="index-_002dm64-option_002c-s390"></a>
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</dd>
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<dt><code>-m31 | -m64</code></dt>
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<dd><p>Select 31- or 64-bit ABI implying a word size of 32- or 64-bit.
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</p>
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<p>These options are only available with the ELF object file format, and
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require that the necessary BFD support has been included (on a 31-bit
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platform you must add –enable-64-bit-bfd on the call to the configure
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script to enable 64-bit usage and use s390x as target platform).
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</p>
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<a name="index-_002dmesa-option_002c-s390"></a>
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<a name="index-_002dmzarch-option_002c-s390"></a>
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</dd>
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<dt><code>-mesa | -mzarch</code></dt>
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<dd><p>Select the architecture mode, either the Enterprise System Architecture
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(esa) mode or the z/Architecture mode (zarch).
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</p>
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<p>The 64-bit instructions are only available with the z/Architecture mode.
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The combination of ‘<samp>-m64</samp>’ and ‘<samp>-mesa</samp>’ results in a warning
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message.
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</p>
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<a name="index-_002dmarch_003d-option_002c-s390"></a>
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</dd>
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<dt><code>-march=<var>CPU</var></code></dt>
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<dd><p>This option specifies the target processor. The following processor names
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are recognized:
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<code>g5</code> (or <code>arch3</code>),
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<code>g6</code>,
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<code>z900</code> (or <code>arch5</code>),
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<code>z990</code> (or <code>arch6</code>),
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<code>z9-109</code>,
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<code>z9-ec</code> (or <code>arch7</code>),
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<code>z10</code> (or <code>arch8</code>),
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<code>z196</code> (or <code>arch9</code>),
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<code>zEC12</code> (or <code>arch10</code>),
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<code>z13</code> (or <code>arch11</code>),
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<code>z14</code> (or <code>arch12</code>), and
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<code>arch13</code>).
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</p>
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<p>Assembling an instruction that is not supported on the target
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processor results in an error message.
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</p>
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<p>The processor names starting with <code>arch</code> refer to the edition
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number in the Principle of Operations manual. They can be used as
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alternate processor names and have been added for compatibility with
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the IBM XL compiler.
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</p>
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<p><code>arch3</code>, <code>g5</code> and <code>g6</code> cannot be used with the
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‘<samp>-mzarch</samp>’ option since the z/Architecture mode is not supported
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on these processor levels.
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</p>
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<p>There is no <code>arch4</code> option supported. <code>arch4</code> matches
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<code>-march=arch5 -mesa</code>.
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</p>
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<a name="index-_002dmregnames-option_002c-s390"></a>
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</dd>
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<dt><code>-mregnames</code></dt>
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<dd><p>Allow symbolic names for registers.
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</p>
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<a name="index-_002dmno_002dregnames-option_002c-s390"></a>
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</dd>
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<dt><code>-mno-regnames</code></dt>
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<dd><p>Do not allow symbolic names for registers.
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</p>
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<a name="index-_002dmwarn_002dareg_002dzero-option_002c-s390"></a>
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</dd>
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<dt><code>-mwarn-areg-zero</code></dt>
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<dd><p>Warn whenever the operand for a base or index register has been specified
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but evaluates to zero. This can indicate the misuse of general purpose
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register 0 as an address register.
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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="s390-Characters.html#s390-Characters" accesskey="n" rel="next">s390 Characters</a>, Up: <a href="S_002f390_002dDependent.html#S_002f390_002dDependent" accesskey="u" rel="up">S/390-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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</body>
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</html>
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