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  1. <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">

  2. <html>

  3. <!-- This file documents the GNU Assembler "as".

  4. 

  5. Copyright (C) 1991-2020 Free Software Foundation, Inc.

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  15. <head>

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  17. <title>LM32-Regs (Using as)</title>

  18. 

  19. <meta name="description" content="LM32-Regs (Using as)">

  20. <meta name="keywords" content="LM32-Regs (Using as)">

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  25. <link href="AS-Index.html#AS-Index" rel="index" title="AS Index">

  26. <link href="index.html#SEC_Contents" rel="contents" title="Table of Contents">

  27. <link href="LM32-Syntax.html#LM32-Syntax" rel="up" title="LM32 Syntax">

  28. <link href="LM32_002dModifiers.html#LM32_002dModifiers" rel="next" title="LM32-Modifiers">

  29. <link href="LM32-Syntax.html#LM32-Syntax" rel="prev" title="LM32 Syntax">

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  61. <body lang="en">

  62. <a name="LM32_002dRegs"></a>

  63. <div class="header">

  64. <p>

  65. Next: <a href="LM32_002dModifiers.html#LM32_002dModifiers" accesskey="n" rel="next">LM32-Modifiers</a>, Up: <a href="LM32-Syntax.html#LM32-Syntax" accesskey="u" rel="up">LM32 Syntax</a> &nbsp; [<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>

  66. </div>

  67. <hr>

  68. <a name="Register-Names-10"></a>

  69. <h4 class="subsubsection">9.19.2.1 Register Names</h4>

  70. 

  71. <a name="index-LM32-register-names"></a>

  72. <a name="index-register-names_002c-LM32"></a>

  73. 

  74. <p>LM32 has 32 x 32-bit general purpose registers &lsquo;<samp>r0</samp>&rsquo;,

  75. &lsquo;<samp>r1</samp>&rsquo;, ... &lsquo;<samp>r31</samp>&rsquo;.

  76. </p>

  77. <p>The following aliases are defined: &lsquo;<samp>gp</samp>&rsquo; - &lsquo;<samp>r26</samp>&rsquo;,

  78. &lsquo;<samp>fp</samp>&rsquo; - &lsquo;<samp>r27</samp>&rsquo;, &lsquo;<samp>sp</samp>&rsquo; - &lsquo;<samp>r28</samp>&rsquo;,

  79. &lsquo;<samp>ra</samp>&rsquo; - &lsquo;<samp>r29</samp>&rsquo;, &lsquo;<samp>ea</samp>&rsquo; - &lsquo;<samp>r30</samp>&rsquo;,

  80. &lsquo;<samp>ba</samp>&rsquo; - &lsquo;<samp>r31</samp>&rsquo;.

  81. </p>

  82. <p>LM32 has the following Control and Status Registers (CSRs).

  83. </p>

  84. <dl compact="compact">

  85. <dt><code>IE</code></dt>

  86. <dd><p>Interrupt enable.

  87. </p></dd>

  88. <dt><code>IM</code></dt>

  89. <dd><p>Interrupt mask.

  90. </p></dd>

  91. <dt><code>IP</code></dt>

  92. <dd><p>Interrupt pending.

  93. </p></dd>

  94. <dt><code>ICC</code></dt>

  95. <dd><p>Instruction cache control.

  96. </p></dd>

  97. <dt><code>DCC</code></dt>

  98. <dd><p>Data cache control.

  99. </p></dd>

  100. <dt><code>CC</code></dt>

  101. <dd><p>Cycle counter.

  102. </p></dd>

  103. <dt><code>CFG</code></dt>

  104. <dd><p>Configuration.

  105. </p></dd>

  106. <dt><code>EBA</code></dt>

  107. <dd><p>Exception base address.

  108. </p></dd>

  109. <dt><code>DC</code></dt>

  110. <dd><p>Debug control.

  111. </p></dd>

  112. <dt><code>DEBA</code></dt>

  113. <dd><p>Debug exception base address.

  114. </p></dd>

  115. <dt><code>JTX</code></dt>

  116. <dd><p>JTAG transmit.

  117. </p></dd>

  118. <dt><code>JRX</code></dt>

  119. <dd><p>JTAG receive.

  120. </p></dd>

  121. <dt><code>BP0</code></dt>

  122. <dd><p>Breakpoint 0.

  123. </p></dd>

  124. <dt><code>BP1</code></dt>

  125. <dd><p>Breakpoint 1.

  126. </p></dd>

  127. <dt><code>BP2</code></dt>

  128. <dd><p>Breakpoint 2.

  129. </p></dd>

  130. <dt><code>BP3</code></dt>

  131. <dd><p>Breakpoint 3.

  132. </p></dd>

  133. <dt><code>WP0</code></dt>

  134. <dd><p>Watchpoint 0.

  135. </p></dd>

  136. <dt><code>WP1</code></dt>

  137. <dd><p>Watchpoint 1.

  138. </p></dd>

  139. <dt><code>WP2</code></dt>

  140. <dd><p>Watchpoint 2.

  141. </p></dd>

  142. <dt><code>WP3</code></dt>

  143. <dd><p>Watchpoint 3.

  144. </p></dd>

  145. </dl>

  146. 

  147. 

  148. 

  149. 

  150. </body>

  151. </html>