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78 lines
3.5 KiB
HTML
78 lines
3.5 KiB
HTML
15 years ago
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<title>D10V-Regs - Using as</title>
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<link title="Top" rel="start" href="index.html#Top">
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<link rel="up" href="D10V_002dSyntax.html#D10V_002dSyntax" title="D10V-Syntax">
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<link rel="prev" href="D10V_002dChars.html#D10V_002dChars" title="D10V-Chars">
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<link rel="next" href="D10V_002dAddressing.html#D10V_002dAddressing" title="D10V-Addressing">
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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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<body>
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<div class="node">
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<p>
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<a name="D10V_002dRegs"></a>Next: <a rel="next" accesskey="n" href="D10V_002dAddressing.html#D10V_002dAddressing">D10V-Addressing</a>,
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Previous: <a rel="previous" accesskey="p" href="D10V_002dChars.html#D10V_002dChars">D10V-Chars</a>,
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Up: <a rel="up" accesskey="u" href="D10V_002dSyntax.html#D10V_002dSyntax">D10V-Syntax</a>
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<hr><br>
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</div>
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<h5 class="subsubsection">9.8.2.4 Register Names</h5>
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<p><a name="index-D10V-registers-737"></a><a name="index-registers_002c-D10V-738"></a>You can use the predefined symbols <span class="samp">r0</span> through <span class="samp">r15</span> to refer to the D10V
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registers. You can also use <span class="samp">sp</span> as an alias for <span class="samp">r15</span>. The accumulators
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are <span class="samp">a0</span> and <span class="samp">a1</span>. There are special register-pair names that may
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optionally be used in opcodes that require even-numbered registers. Register names are
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not case sensitive.
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<p>Register Pairs
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<dl>
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<dt><code>r0-r1</code><br><dt><code>r2-r3</code><br><dt><code>r4-r5</code><br><dt><code>r6-r7</code><br><dt><code>r8-r9</code><br><dt><code>r10-r11</code><br><dt><code>r12-r13</code><br><dt><code>r14-r15</code><dd></dl>
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<p>The D10V also has predefined symbols for these control registers and status bits:
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<dl>
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<dt><code>psw</code><dd>Processor Status Word
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<br><dt><code>bpsw</code><dd>Backup Processor Status Word
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<br><dt><code>pc</code><dd>Program Counter
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<br><dt><code>bpc</code><dd>Backup Program Counter
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<br><dt><code>rpt_c</code><dd>Repeat Count
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<br><dt><code>rpt_s</code><dd>Repeat Start address
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<br><dt><code>rpt_e</code><dd>Repeat End address
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<br><dt><code>mod_s</code><dd>Modulo Start address
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<br><dt><code>mod_e</code><dd>Modulo End address
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<br><dt><code>iba</code><dd>Instruction Break Address
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<br><dt><code>f0</code><dd>Flag 0
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<br><dt><code>f1</code><dd>Flag 1
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<br><dt><code>c</code><dd>Carry flag
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</dl>
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</body></html>
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