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85 lines
3.9 KiB
HTML
85 lines
3.9 KiB
HTML
4 years ago
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<title>LM32-Regs - Using as</title>
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<meta name="description" content="Using as">
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<link title="Top" rel="start" href="index.html#Top">
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<link rel="up" href="LM32-Syntax.html#LM32-Syntax" title="LM32 Syntax">
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<link rel="next" href="LM32_002dModifiers.html#LM32_002dModifiers" title="LM32-Modifiers">
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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) 1991-2015 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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--></style>
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</head>
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<body>
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<div class="node">
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<a name="LM32-Regs"></a>
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<a name="LM32_002dRegs"></a>
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<p>
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Next: <a rel="next" accesskey="n" href="LM32_002dModifiers.html#LM32_002dModifiers">LM32-Modifiers</a>,
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Up: <a rel="up" accesskey="u" href="LM32-Syntax.html#LM32-Syntax">LM32 Syntax</a>
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<hr>
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</div>
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<h5 class="subsubsection">9.20.2.1 Register Names</h5>
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<p><a name="index-LM32-register-names-1252"></a><a name="index-register-names_002c-LM32-1253"></a>
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LM32 has 32 x 32-bit general purpose registers ‘<samp><span class="samp">r0</span></samp>’,
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‘<samp><span class="samp">r1</span></samp>’, ... ‘<samp><span class="samp">r31</span></samp>’.
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<p>The following aliases are defined: ‘<samp><span class="samp">gp</span></samp>’ - ‘<samp><span class="samp">r26</span></samp>’,
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‘<samp><span class="samp">fp</span></samp>’ - ‘<samp><span class="samp">r27</span></samp>’, ‘<samp><span class="samp">sp</span></samp>’ - ‘<samp><span class="samp">r28</span></samp>’,
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‘<samp><span class="samp">ra</span></samp>’ - ‘<samp><span class="samp">r29</span></samp>’, ‘<samp><span class="samp">ea</span></samp>’ - ‘<samp><span class="samp">r30</span></samp>’,
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‘<samp><span class="samp">ba</span></samp>’ - ‘<samp><span class="samp">r31</span></samp>’.
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<p>LM32 has the following Control and Status Registers (CSRs).
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<dl>
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<dt><code>IE</code><dd>Interrupt enable.
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<br><dt><code>IM</code><dd>Interrupt mask.
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<br><dt><code>IP</code><dd>Interrupt pending.
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<br><dt><code>ICC</code><dd>Instruction cache control.
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<br><dt><code>DCC</code><dd>Data cache control.
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<br><dt><code>CC</code><dd>Cycle counter.
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<br><dt><code>CFG</code><dd>Configuration.
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<br><dt><code>EBA</code><dd>Exception base address.
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<br><dt><code>DC</code><dd>Debug control.
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<br><dt><code>DEBA</code><dd>Debug exception base address.
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<br><dt><code>JTX</code><dd>JTAG transmit.
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<br><dt><code>JRX</code><dd>JTAG receive.
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<br><dt><code>BP0</code><dd>Breakpoint 0.
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<br><dt><code>BP1</code><dd>Breakpoint 1.
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<br><dt><code>BP2</code><dd>Breakpoint 2.
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<br><dt><code>BP3</code><dd>Breakpoint 3.
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<br><dt><code>WP0</code><dd>Watchpoint 0.
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<br><dt><code>WP1</code><dd>Watchpoint 1.
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<br><dt><code>WP2</code><dd>Watchpoint 2.
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<br><dt><code>WP3</code><dd>Watchpoint 3.
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</dl>
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</body></html>
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