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toolchain-gcc-arm-embedded/share/doc/gcc-arm-none-eabi/html/as.html/SH_002dRegs.html

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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.

  6. 

  7. Permission is granted to copy, distribute and/or modify this document

  8. under the terms of the GNU Free Documentation License, Version 1.3

  9. or any later version published by the Free Software Foundation;

  10. with no Invariant Sections, with no Front-Cover Texts, and with no

  11. Back-Cover Texts.  A copy of the license is included in the

  12. section entitled "GNU Free Documentation License".

  13.  -->

  14. <!-- Created by GNU Texinfo 6.5, http://www.gnu.org/software/texinfo/ -->

  15. <head>

  16. <meta http-equiv="Content-Type" content="text/html; charset=utf-8">

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

  18. 

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

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

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  23. <meta name="Generator" content="makeinfo">

  24. <link href="index.html#Top" rel="start" title="Top">

  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="SH-Syntax.html#SH-Syntax" rel="up" title="SH Syntax">

  28. <link href="SH_002dAddressing.html#SH_002dAddressing" rel="next" title="SH-Addressing">

  29. <link href="SH_002dChars.html#SH_002dChars" rel="prev" title="SH-Chars">

  30. <style type="text/css">

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  56. </style>

  57. 

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  59. </head>

  60. 

  61. <body lang="en">

  62. <a name="SH_002dRegs"></a>

  63. <div class="header">

  64. <p>

  65. Next: <a href="SH_002dAddressing.html#SH_002dAddressing" accesskey="n" rel="next">SH-Addressing</a>, Previous: <a href="SH_002dChars.html#SH_002dChars" accesskey="p" rel="prev">SH-Chars</a>, Up: <a href="SH-Syntax.html#SH-Syntax" accesskey="u" rel="up">SH 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-15"></a>

  69. <h4 class="subsubsection">9.43.2.2 Register Names</h4>

  70. 

  71. <a name="index-SH-registers"></a>

  72. <a name="index-registers_002c-SH"></a>

  73. <p>You can use the predefined symbols &lsquo;<samp>r0</samp>&rsquo;, &lsquo;<samp>r1</samp>&rsquo;, &lsquo;<samp>r2</samp>&rsquo;,

  74. &lsquo;<samp>r3</samp>&rsquo;, &lsquo;<samp>r4</samp>&rsquo;, &lsquo;<samp>r5</samp>&rsquo;, &lsquo;<samp>r6</samp>&rsquo;, &lsquo;<samp>r7</samp>&rsquo;, &lsquo;<samp>r8</samp>&rsquo;,

  75. &lsquo;<samp>r9</samp>&rsquo;, &lsquo;<samp>r10</samp>&rsquo;, &lsquo;<samp>r11</samp>&rsquo;, &lsquo;<samp>r12</samp>&rsquo;, &lsquo;<samp>r13</samp>&rsquo;, &lsquo;<samp>r14</samp>&rsquo;,

  76. and &lsquo;<samp>r15</samp>&rsquo; to refer to the SH registers.

  77. </p>

  78. <p>The SH also has these control registers:

  79. </p>

  80. <dl compact="compact">

  81. <dt><code>pr</code></dt>

  82. <dd><p>procedure register (holds return address)

  83. </p>

  84. </dd>

  85. <dt><code>pc</code></dt>

  86. <dd><p>program counter

  87. </p>

  88. </dd>

  89. <dt><code>mach</code></dt>

  90. <dt><code>macl</code></dt>

  91. <dd><p>high and low multiply accumulator registers

  92. </p>

  93. </dd>

  94. <dt><code>sr</code></dt>

  95. <dd><p>status register

  96. </p>

  97. </dd>

  98. <dt><code>gbr</code></dt>

  99. <dd><p>global base register

  100. </p>

  101. </dd>

  102. <dt><code>vbr</code></dt>

  103. <dd><p>vector base register (for interrupt vectors)

  104. </p></dd>

  105. </dl>

  106. 

  107. 

  108. 

  109. 

  110. </body>

  111. </html>