296 lines
13 KiB
HTML
296 lines
13 KiB
HTML
|
<!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) 1991-2016 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 5.2, http://www.gnu.org/software/texinfo/ -->
|
||
|
|
<head>
|
||
|
|
<title>Using as: s390 Formats</title>
|
||
|
|
|
||
|
|
<meta name="description" content="Using as: s390 Formats">
|
||
|
|
<meta name="keywords" content="Using as: s390 Formats">
|
||
|
|
<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="s390-Syntax.html#s390-Syntax" rel="up" title="s390 Syntax">
|
||
|
|
<link href="s390-Aliases.html#s390-Aliases" rel="next" title="s390 Aliases">
|
||
|
|
<link href="s390-Operands.html#s390-Operands" rel="prev" title="s390 Operands">
|
||
|
|
<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-Formats"></a>
|
||
|
|
<div class="header">
|
||
|
|
<p>
|
||
|
|
Next: <a href="s390-Aliases.html#s390-Aliases" accesskey="n" rel="next">s390 Aliases</a>, Previous: <a href="s390-Operands.html#s390-Operands" accesskey="p" rel="prev">s390 Operands</a>, Up: <a href="s390-Syntax.html#s390-Syntax" accesskey="u" rel="up">s390 Syntax</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="Instruction-Formats"></a>
|
||
|
|
<h4 class="subsubsection">9.38.3.4 Instruction Formats</h4>
|
||
|
|
<a name="index-instruction-formats_002c-s390"></a>
|
||
|
|
<a name="index-s390-instruction-formats"></a>
|
||
|
|
|
||
|
|
<p>The Principles of Operation manuals lists 26 instruction formats where
|
||
|
|
some of the formats have multiple variants. For the ‘<samp>.insn</samp>’
|
||
|
|
pseudo directive the assembler recognizes some of the formats.
|
||
|
|
Typically, the most general variant of the instruction format is used
|
||
|
|
by the ‘<samp>.insn</samp>’ directive.
|
||
|
|
</p>
|
||
|
|
<p>The following table lists the abbreviations used in the table of
|
||
|
|
instruction formats:
|
||
|
|
</p>
|
||
|
|
<div class="display">
|
||
|
|
<table>
|
||
|
|
<tr><td><pre class="display">OpCode / OpCd</pre></td><td><pre class="display">Part of the op code.</pre></td></tr>
|
||
|
|
<tr><td><pre class="display">Bx</pre></td><td><pre class="display">Base register number for operand x.</pre></td></tr>
|
||
|
|
<tr><td><pre class="display">Dx</pre></td><td><pre class="display">Displacement for operand x.</pre></td></tr>
|
||
|
|
<tr><td><pre class="display">DLx</pre></td><td><pre class="display">Displacement lower 12 bits for operand x.</pre></td></tr>
|
||
|
|
<tr><td><pre class="display">DHx</pre></td><td><pre class="display">Displacement higher 8-bits for operand x.</pre></td></tr>
|
||
|
|
<tr><td><pre class="display">Rx</pre></td><td><pre class="display">Register number for operand x.</pre></td></tr>
|
||
|
|
<tr><td><pre class="display">Xx</pre></td><td><pre class="display">Index register number for operand x.</pre></td></tr>
|
||
|
|
<tr><td><pre class="display">Ix</pre></td><td><pre class="display">Signed immediate for operand x.</pre></td></tr>
|
||
|
|
<tr><td><pre class="display">Ux</pre></td><td><pre class="display">Unsigned immediate for operand x.</pre></td></tr>
|
||
|
|
</table>
|
||
|
|
</div>
|
||
|
|
|
||
|
|
<p>An instruction is two, four, or six bytes in length and must be aligned
|
||
|
|
on a 2 byte boundary. The first two bits of the instruction specify the
|
||
|
|
length of the instruction, 00 indicates a two byte instruction, 01 and 10
|
||
|
|
indicates a four byte instruction, and 11 indicates a six byte instruction.
|
||
|
|
</p>
|
||
|
|
<p>The following table lists the s390 instruction formats that are available
|
||
|
|
with the ‘<samp>.insn</samp>’ pseudo directive:
|
||
|
|
</p>
|
||
|
|
<dl compact="compact">
|
||
|
|
<dt><code>E format</code></dt>
|
||
|
|
<dd><pre class="verbatim">+-------------+
|
||
|
|
| OpCode |
|
||
|
|
+-------------+
|
||
|
|
0 15
|
||
|
|
</pre>
|
||
|
|
</dd>
|
||
|
|
<dt><code>RI format: <insn> R1,I2</code></dt>
|
||
|
|
<dd><pre class="verbatim">+--------+----+----+------------------+
|
||
|
|
| OpCode | R1 |OpCd| I2 |
|
||
|
|
+--------+----+----+------------------+
|
||
|
|
0 8 12 16 31
|
||
|
|
</pre>
|
||
|
|
</dd>
|
||
|
|
<dt><code>RIE format: <insn> R1,R3,I2</code></dt>
|
||
|
|
<dd><pre class="verbatim">+--------+----+----+------------------+--------+--------+
|
||
|
|
| OpCode | R1 | R3 | I2 |////////| OpCode |
|
||
|
|
+--------+----+----+------------------+--------+--------+
|
||
|
|
0 8 12 16 32 40 47
|
||
|
|
</pre>
|
||
|
|
</dd>
|
||
|
|
<dt><code>RIL format: <insn> R1,I2</code></dt>
|
||
|
|
<dd><pre class="verbatim">+--------+----+----+------------------------------------+
|
||
|
|
| OpCode | R1 |OpCd| I2 |
|
||
|
|
+--------+----+----+------------------------------------+
|
||
|
|
0 8 12 16 47
|
||
|
|
</pre>
|
||
|
|
</dd>
|
||
|
|
<dt><code>RILU format: <insn> R1,U2</code></dt>
|
||
|
|
<dd><pre class="verbatim">+--------+----+----+------------------------------------+
|
||
|
|
| OpCode | R1 |OpCd| U2 |
|
||
|
|
+--------+----+----+------------------------------------+
|
||
|
|
0 8 12 16 47
|
||
|
|
</pre>
|
||
|
|
</dd>
|
||
|
|
<dt><code>RIS format: <insn> R1,I2,M3,D4(B4)</code></dt>
|
||
|
|
<dd><pre class="verbatim">+--------+----+----+----+-------------+--------+--------+
|
||
|
|
| OpCode | R1 | M3 | B4 | D4 | I2 | Opcode |
|
||
|
|
+--------+----+----+----+-------------+--------+--------+
|
||
|
|
0 8 12 16 20 32 36 47
|
||
|
|
</pre>
|
||
|
|
</dd>
|
||
|
|
<dt><code>RR format: <insn> R1,R2</code></dt>
|
||
|
|
<dd><pre class="verbatim">+--------+----+----+
|
||
|
|
| OpCode | R1 | R2 |
|
||
|
|
+--------+----+----+
|
||
|
|
0 8 12 15
|
||
|
|
</pre>
|
||
|
|
</dd>
|
||
|
|
<dt><code>RRE format: <insn> R1,R2</code></dt>
|
||
|
|
<dd><pre class="verbatim">+------------------+--------+----+----+
|
||
|
|
| OpCode |////////| R1 | R2 |
|
||
|
|
+------------------+--------+----+----+
|
||
|
|
0 16 24 28 31
|
||
|
|
</pre>
|
||
|
|
</dd>
|
||
|
|
<dt><code>RRF format: <insn> R1,R2,R3,M4</code></dt>
|
||
|
|
<dd><pre class="verbatim">+------------------+----+----+----+----+
|
||
|
|
| OpCode | R3 | M4 | R1 | R2 |
|
||
|
|
+------------------+----+----+----+----+
|
||
|
|
0 16 20 24 28 31
|
||
|
|
</pre>
|
||
|
|
</dd>
|
||
|
|
<dt><code>RRS format: <insn> R1,R2,M3,D4(B4)</code></dt>
|
||
|
|
<dd><pre class="verbatim">+--------+----+----+----+-------------+----+----+--------+
|
||
|
|
| OpCode | R1 | R3 | B4 | D4 | M3 |////| OpCode |
|
||
|
|
+--------+----+----+----+-------------+----+----+--------+
|
||
|
|
0 8 12 16 20 32 36 40 47
|
||
|
|
</pre>
|
||
|
|
</dd>
|
||
|
|
<dt><code>RS format: <insn> R1,R3,D2(B2)</code></dt>
|
||
|
|
<dd><pre class="verbatim">+--------+----+----+----+-------------+
|
||
|
|
| OpCode | R1 | R3 | B2 | D2 |
|
||
|
|
+--------+----+----+----+-------------+
|
||
|
|
0 8 12 16 20 31
|
||
|
|
</pre>
|
||
|
|
</dd>
|
||
|
|
<dt><code>RSE format: <insn> R1,R3,D2(B2)</code></dt>
|
||
|
|
<dd><pre class="verbatim">+--------+----+----+----+-------------+--------+--------+
|
||
|
|
| OpCode | R1 | R3 | B2 | D2 |////////| OpCode |
|
||
|
|
+--------+----+----+----+-------------+--------+--------+
|
||
|
|
0 8 12 16 20 32 40 47
|
||
|
|
</pre>
|
||
|
|
</dd>
|
||
|
|
<dt><code>RSI format: <insn> R1,R3,I2</code></dt>
|
||
|
|
<dd><pre class="verbatim">+--------+----+----+------------------------------------+
|
||
|
|
| OpCode | R1 | R3 | I2 |
|
||
|
|
+--------+----+----+------------------------------------+
|
||
|
|
0 8 12 16 47
|
||
|
|
</pre>
|
||
|
|
</dd>
|
||
|
|
<dt><code>RSY format: <insn> R1,R3,D2(B2)</code></dt>
|
||
|
|
<dd><pre class="verbatim">+--------+----+----+----+-------------+--------+--------+
|
||
|
|
| OpCode | R1 | R3 | B2 | DL2 | DH2 | OpCode |
|
||
|
|
+--------+----+----+----+-------------+--------+--------+
|
||
|
|
0 8 12 16 20 32 40 47
|
||
|
|
</pre>
|
||
|
|
</dd>
|
||
|
|
<dt><code>RX format: <insn> R1,D2(X2,B2)</code></dt>
|
||
|
|
<dd><pre class="verbatim">+--------+----+----+----+-------------+
|
||
|
|
| OpCode | R1 | X2 | B2 | D2 |
|
||
|
|
+--------+----+----+----+-------------+
|
||
|
|
0 8 12 16 20 31
|
||
|
|
</pre>
|
||
|
|
</dd>
|
||
|
|
<dt><code>RXE format: <insn> R1,D2(X2,B2)</code></dt>
|
||
|
|
<dd><pre class="verbatim">+--------+----+----+----+-------------+--------+--------+
|
||
|
|
| OpCode | R1 | X2 | B2 | D2 |////////| OpCode |
|
||
|
|
+--------+----+----+----+-------------+--------+--------+
|
||
|
|
0 8 12 16 20 32 40 47
|
||
|
|
</pre>
|
||
|
|
</dd>
|
||
|
|
<dt><code>RXF format: <insn> R1,R3,D2(X2,B2)</code></dt>
|
||
|
|
<dd><pre class="verbatim">+--------+----+----+----+-------------+----+---+--------+
|
||
|
|
| OpCode | R3 | X2 | B2 | D2 | R1 |///| OpCode |
|
||
|
|
+--------+----+----+----+-------------+----+---+--------+
|
||
|
|
0 8 12 16 20 32 36 40 47
|
||
|
|
</pre>
|
||
|
|
</dd>
|
||
|
|
<dt><code>RXY format: <insn> R1,D2(X2,B2)</code></dt>
|
||
|
|
<dd><pre class="verbatim">+--------+----+----+----+-------------+--------+--------+
|
||
|
|
| OpCode | R1 | X2 | B2 | DL2 | DH2 | OpCode |
|
||
|
|
+--------+----+----+----+-------------+--------+--------+
|
||
|
|
0 8 12 16 20 32 36 40 47
|
||
|
|
</pre>
|
||
|
|
</dd>
|
||
|
|
<dt><code>S format: <insn> D2(B2)</code></dt>
|
||
|
|
<dd><pre class="verbatim">+------------------+----+-------------+
|
||
|
|
| OpCode | B2 | D2 |
|
||
|
|
+------------------+----+-------------+
|
||
|
|
0 16 20 31
|
||
|
|
</pre>
|
||
|
|
</dd>
|
||
|
|
<dt><code>SI format: <insn> D1(B1),I2</code></dt>
|
||
|
|
<dd><pre class="verbatim">+--------+---------+----+-------------+
|
||
|
|
| OpCode | I2 | B1 | D1 |
|
||
|
|
+--------+---------+----+-------------+
|
||
|
|
0 8 16 20 31
|
||
|
|
</pre>
|
||
|
|
</dd>
|
||
|
|
<dt><code>SIY format: <insn> D1(B1),U2</code></dt>
|
||
|
|
<dd><pre class="verbatim">+--------+---------+----+-------------+--------+--------+
|
||
|
|
| OpCode | I2 | B1 | DL1 | DH1 | OpCode |
|
||
|
|
+--------+---------+----+-------------+--------+--------+
|
||
|
|
0 8 16 20 32 36 40 47
|
||
|
|
</pre>
|
||
|
|
</dd>
|
||
|
|
<dt><code>SIL format: <insn> D1(B1),I2</code></dt>
|
||
|
|
<dd><pre class="verbatim">+------------------+----+-------------+-----------------+
|
||
|
|
| OpCode | B1 | D1 | I2 |
|
||
|
|
+------------------+----+-------------+-----------------+
|
||
|
|
0 16 20 32 47
|
||
|
|
</pre>
|
||
|
|
</dd>
|
||
|
|
<dt><code>SS format: <insn> D1(R1,B1),D2(B3),R3</code></dt>
|
||
|
|
<dd><pre class="verbatim">+--------+----+----+----+-------------+----+------------+
|
||
|
|
| OpCode | R1 | R3 | B1 | D1 | B2 | D2 |
|
||
|
|
+--------+----+----+----+-------------+----+------------+
|
||
|
|
0 8 12 16 20 32 36 47
|
||
|
|
</pre>
|
||
|
|
</dd>
|
||
|
|
<dt><code>SSE format: <insn> D1(B1),D2(B2)</code></dt>
|
||
|
|
<dd><pre class="verbatim">+------------------+----+-------------+----+------------+
|
||
|
|
| OpCode | B1 | D1 | B2 | D2 |
|
||
|
|
+------------------+----+-------------+----+------------+
|
||
|
|
0 8 12 16 20 32 36 47
|
||
|
|
</pre>
|
||
|
|
</dd>
|
||
|
|
<dt><code>SSF format: <insn> D1(B1),D2(B2),R3</code></dt>
|
||
|
|
<dd><pre class="verbatim">+--------+----+----+----+-------------+----+------------+
|
||
|
|
| OpCode | R3 |OpCd| B1 | D1 | B2 | D2 |
|
||
|
|
+--------+----+----+----+-------------+----+------------+
|
||
|
|
0 8 12 16 20 32 36 47
|
||
|
|
</pre>
|
||
|
|
</dd>
|
||
|
|
</dl>
|
||
|
|
|
||
|
|
<p>For the complete list of all instruction format variants see the
|
||
|
|
Principles of Operation manuals.
|
||
|
|
</p>
|
||
|
|
<hr>
|
||
|
|
<div class="header">
|
||
|
|
<p>
|
||
|
|
Next: <a href="s390-Aliases.html#s390-Aliases" accesskey="n" rel="next">s390 Aliases</a>, Previous: <a href="s390-Operands.html#s390-Operands" accesskey="p" rel="prev">s390 Operands</a>, Up: <a href="s390-Syntax.html#s390-Syntax" accesskey="u" rel="up">s390 Syntax</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>
|