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toolchain-gcc-arm-embedded/share/doc/gcc-arm-none-eabi/html/as.html/SH_002dAddressing.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-Addressing (Using as)</title>

  18. 

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

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

  21. <meta name="resource-type" content="document">

  22. <meta name="distribution" content="global">

  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-Floating-Point.html#SH-Floating-Point" rel="next" title="SH Floating Point">

  29. <link href="SH_002dRegs.html#SH_002dRegs" rel="prev" title="SH-Regs">

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

  31. <!--

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  56. </style>

  57. 

  58. 

  59. </head>

  60. 

  61. <body lang="en">

  62. <a name="SH_002dAddressing"></a>

  63. <div class="header">

  64. <p>

  65. Previous: <a href="SH_002dRegs.html#SH_002dRegs" accesskey="p" rel="prev">SH-Regs</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="Addressing-Modes-4"></a>

  69. <h4 class="subsubsection">9.43.2.3 Addressing Modes</h4>

  70. 

  71. <a name="index-addressing-modes_002c-SH"></a>

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

  73. <p><code>as</code> understands the following addressing modes for the SH.

  74. <code>R<var>n</var></code> in the following refers to any of the numbered

  75. registers, but <em>not</em> the control registers.

  76. </p>

  77. <dl compact="compact">

  78. <dt><code>R<var>n</var></code></dt>

  79. <dd><p>Register direct

  80. </p>

  81. </dd>

  82. <dt><code>@R<var>n</var></code></dt>

  83. <dd><p>Register indirect

  84. </p>

  85. </dd>

  86. <dt><code>@-R<var>n</var></code></dt>

  87. <dd><p>Register indirect with pre-decrement

  88. </p>

  89. </dd>

  90. <dt><code>@R<var>n</var>+</code></dt>

  91. <dd><p>Register indirect with post-increment

  92. </p>

  93. </dd>

  94. <dt><code>@(<var>disp</var>, R<var>n</var>)</code></dt>

  95. <dd><p>Register indirect with displacement

  96. </p>

  97. </dd>

  98. <dt><code>@(R0, R<var>n</var>)</code></dt>

  99. <dd><p>Register indexed

  100. </p>

  101. </dd>

  102. <dt><code>@(<var>disp</var>, GBR)</code></dt>

  103. <dd><p><code>GBR</code> offset

  104. </p>

  105. </dd>

  106. <dt><code>@(R0, GBR)</code></dt>

  107. <dd><p>GBR indexed

  108. </p>

  109. </dd>

  110. <dt><code><var>addr</var></code></dt>

  111. <dt><code>@(<var>disp</var>, PC)</code></dt>

  112. <dd><p>PC relative address (for branch or for addressing memory).  The

  113. <code>as</code> implementation allows you to use the simpler form

  114. <var>addr</var> anywhere a PC relative address is called for; the alternate

  115. form is supported for compatibility with other assemblers.

  116. </p>

  117. </dd>

  118. <dt><code>#<var>imm</var></code></dt>

  119. <dd><p>Immediate data

  120. </p></dd>

  121. </dl>

  122. 

  123. 

  124. 

  125. 

  126. </body>

  127. </html>