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toolchain-gcc-arm-embedded/share/doc/gcc-arm-none-eabi/html/as.html/Z80-Syntax.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>Z80 Syntax (Using as)</title>

  18. 

  19. <meta name="description" content="Z80 Syntax (Using as)">

  20. <meta name="keywords" content="Z80 Syntax (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="Z80_002dDependent.html#Z80_002dDependent" rel="up" title="Z80-Dependent">

  28. <link href="Z80_002dChars.html#Z80_002dChars" rel="next" title="Z80-Chars">

  29. <link href="Z80-Options.html#Z80-Options" rel="prev" title="Z80 Options">

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

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  56. </style>

  57. 

  58. 

  59. </head>

  60. 

  61. <body lang="en">

  62. <a name="Z80-Syntax"></a>

  63. <div class="header">

  64. <p>

  65. Next: <a href="Z80-Floating-Point.html#Z80-Floating-Point" accesskey="n" rel="next">Z80 Floating Point</a>, Previous: <a href="Z80-Options.html#Z80-Options" accesskey="p" rel="prev">Z80 Options</a>, Up: <a href="Z80_002dDependent.html#Z80_002dDependent" accesskey="u" rel="up">Z80-Dependent</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="Syntax-35"></a>

  69. <h4 class="subsection">9.56.2 Syntax</h4>

  70. <p>The assembler syntax closely follows the &rsquo;Z80 family CPU User Manual&rsquo; by

  71. Zilog.

  72. In expressions a single &lsquo;<samp>=</samp>&rsquo; may be used as &ldquo;is equal to&rdquo;

  73. comparison operator.

  74. </p>

  75. <p>Suffices can be used to indicate the radix of integer constants;

  76. &lsquo;<samp>H</samp>&rsquo; or &lsquo;<samp>h</samp>&rsquo; for hexadecimal, &lsquo;<samp>D</samp>&rsquo; or &lsquo;<samp>d</samp>&rsquo; for decimal,

  77. &lsquo;<samp>Q</samp>&rsquo;, &lsquo;<samp>O</samp>&rsquo;, &lsquo;<samp>q</samp>&rsquo; or &lsquo;<samp>o</samp>&rsquo; for octal, and &lsquo;<samp>B</samp>&rsquo; for

  78. binary.

  79. </p>

  80. <p>The suffix &lsquo;<samp>b</samp>&rsquo; denotes a backreference to local label.

  81. </p>

  82. <table class="menu" border="0" cellspacing="0">

  83. <tr><td align="left" valign="top">&bull; <a href="Z80_002dChars.html#Z80_002dChars" accesskey="1">Z80-Chars</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">Special Characters

  84. </td></tr>

  85. <tr><td align="left" valign="top">&bull; <a href="Z80_002dRegs.html#Z80_002dRegs" accesskey="2">Z80-Regs</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">Register Names

  86. </td></tr>

  87. <tr><td align="left" valign="top">&bull; <a href="Z80_002dCase.html#Z80_002dCase" accesskey="3">Z80-Case</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">Case Sensitivity

  88. </td></tr>

  89. <tr><td align="left" valign="top">&bull; <a href="Z80_002dLabels.html#Z80_002dLabels" accesskey="4">Z80-Labels</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">Labels

  90. </td></tr>

  91. </table>

  92. 

  93. 

  94. 

  95. 

  96. </body>

  97. </html>