<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
|
<html>
|
<!-- This file documents the GNU Assembler "as".
|
|
Copyright (C) 1991-2021 Free Software Foundation, Inc.
|
|
Permission is granted to copy, distribute and/or modify this document
|
under the terms of the GNU Free Documentation License, Version 1.3
|
or any later version published by the Free Software Foundation;
|
with no Invariant Sections, with no Front-Cover Texts, and with no
|
Back-Cover Texts. A copy of the license is included in the
|
section entitled "GNU Free Documentation License".
|
-->
|
<!-- Created by GNU Texinfo 5.1, http://www.gnu.org/software/texinfo/ -->
|
<head>
|
<title>Using as: s390 Options</title>
|
|
<meta name="description" content="Using as: s390 Options">
|
<meta name="keywords" content="Using as: s390 Options">
|
<meta name="resource-type" content="document">
|
<meta name="distribution" content="global">
|
<meta name="Generator" content="makeinfo">
|
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
|
<link href="index.html#Top" rel="start" title="Top">
|
<link href="AS-Index.html#AS-Index" rel="index" title="AS Index">
|
<link href="index.html#SEC_Contents" rel="contents" title="Table of Contents">
|
<link href="S_002f390_002dDependent.html#S_002f390_002dDependent" rel="up" title="S/390-Dependent">
|
<link href="s390-Characters.html#s390-Characters" rel="next" title="s390 Characters">
|
<link href="S_002f390_002dDependent.html#S_002f390_002dDependent" rel="previous" title="S/390-Dependent">
|
<style type="text/css">
|
<!--
|
a.summary-letter {text-decoration: none}
|
blockquote.smallquotation {font-size: smaller}
|
div.display {margin-left: 3.2em}
|
div.example {margin-left: 3.2em}
|
div.indentedblock {margin-left: 3.2em}
|
div.lisp {margin-left: 3.2em}
|
div.smalldisplay {margin-left: 3.2em}
|
div.smallexample {margin-left: 3.2em}
|
div.smallindentedblock {margin-left: 3.2em; font-size: smaller}
|
div.smalllisp {margin-left: 3.2em}
|
kbd {font-style:oblique}
|
pre.display {font-family: inherit}
|
pre.format {font-family: inherit}
|
pre.menu-comment {font-family: serif}
|
pre.menu-preformatted {font-family: serif}
|
pre.smalldisplay {font-family: inherit; font-size: smaller}
|
pre.smallexample {font-size: smaller}
|
pre.smallformat {font-family: inherit; font-size: smaller}
|
pre.smalllisp {font-size: smaller}
|
span.nocodebreak {white-space:nowrap}
|
span.nolinebreak {white-space:nowrap}
|
span.roman {font-family:serif; font-weight:normal}
|
span.sansserif {font-family:sans-serif; font-weight:normal}
|
ul.no-bullet {list-style: none}
|
-->
|
</style>
|
|
|
</head>
|
|
<body lang="en" bgcolor="#FFFFFF" text="#000000" link="#0000FF" vlink="#800080" alink="#FF0000">
|
<a name="s390-Options"></a>
|
<div class="header">
|
<p>
|
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>
|
</div>
|
<hr>
|
<a name="Options-21"></a>
|
<h4 class="subsection">9.41.1 Options</h4>
|
<a name="index-options-for-s390"></a>
|
<a name="index-s390-options"></a>
|
|
<p>The following table lists all available s390 specific options:
|
</p>
|
<dl compact="compact">
|
<dd><a name="index-_002dm31-option_002c-s390"></a>
|
<a name="index-_002dm64-option_002c-s390"></a>
|
</dd>
|
<dt><code>-m31 | -m64</code></dt>
|
<dd><p>Select 31- or 64-bit ABI implying a word size of 32- or 64-bit.
|
</p>
|
<p>These options are only available with the ELF object file format, and
|
require that the necessary BFD support has been included (on a 31-bit
|
platform you must add –enable-64-bit-bfd on the call to the configure
|
script to enable 64-bit usage and use s390x as target platform).
|
</p>
|
<a name="index-_002dmesa-option_002c-s390"></a>
|
<a name="index-_002dmzarch-option_002c-s390"></a>
|
</dd>
|
<dt><code>-mesa | -mzarch</code></dt>
|
<dd><p>Select the architecture mode, either the Enterprise System Architecture
|
(esa) mode or the z/Architecture mode (zarch).
|
</p>
|
<p>The 64-bit instructions are only available with the z/Architecture mode.
|
The combination of ‘<samp>-m64</samp>’ and ‘<samp>-mesa</samp>’ results in a warning
|
message.
|
</p>
|
<a name="index-_002dmarch_003d-option_002c-s390"></a>
|
</dd>
|
<dt><code>-march=<var>CPU</var></code></dt>
|
<dd><p>This option specifies the target processor. The following processor names
|
are recognized:
|
<code>g5</code> (or <code>arch3</code>),
|
<code>g6</code>,
|
<code>z900</code> (or <code>arch5</code>),
|
<code>z990</code> (or <code>arch6</code>),
|
<code>z9-109</code>,
|
<code>z9-ec</code> (or <code>arch7</code>),
|
<code>z10</code> (or <code>arch8</code>),
|
<code>z196</code> (or <code>arch9</code>),
|
<code>zEC12</code> (or <code>arch10</code>),
|
<code>z13</code> (or <code>arch11</code>),
|
<code>z14</code> (or <code>arch12</code>),
|
<code>z15</code> (or <code>arch13</code>), and
|
<code>arch14</code>.
|
</p>
|
<p>Assembling an instruction that is not supported on the target
|
processor results in an error message.
|
</p>
|
<p>The processor names starting with <code>arch</code> refer to the edition
|
number in the Principle of Operations manual. They can be used as
|
alternate processor names and have been added for compatibility with
|
the IBM XL compiler.
|
</p>
|
<p><code>arch3</code>, <code>g5</code> and <code>g6</code> cannot be used with the
|
‘<samp>-mzarch</samp>’ option since the z/Architecture mode is not supported
|
on these processor levels.
|
</p>
|
<p>There is no <code>arch4</code> option supported. <code>arch4</code> matches
|
<code>-march=arch5 -mesa</code>.
|
</p>
|
<a name="index-_002dmregnames-option_002c-s390"></a>
|
</dd>
|
<dt><code>-mregnames</code></dt>
|
<dd><p>Allow symbolic names for registers.
|
</p>
|
<a name="index-_002dmno_002dregnames-option_002c-s390"></a>
|
</dd>
|
<dt><code>-mno-regnames</code></dt>
|
<dd><p>Do not allow symbolic names for registers.
|
</p>
|
<a name="index-_002dmwarn_002dareg_002dzero-option_002c-s390"></a>
|
</dd>
|
<dt><code>-mwarn-areg-zero</code></dt>
|
<dd><p>Warn whenever the operand for a base or index register has been specified
|
but evaluates to zero. This can indicate the misuse of general purpose
|
register 0 as an address register.
|
</p>
|
</dd>
|
</dl>
|
|
<hr>
|
<div class="header">
|
<p>
|
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>
|
</div>
|
|
|
|
</body>
|
</html>
|
