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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>MMIX-Chars (Using as)</title>

  18. 

  19. <meta name="description" content="MMIX-Chars (Using as)">

  20. <meta name="keywords" content="MMIX-Chars (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="MMIX_002dSyntax.html#MMIX_002dSyntax" rel="up" title="MMIX-Syntax">

  28. <link href="MMIX_002dSymbols.html#MMIX_002dSymbols" rel="next" title="MMIX-Symbols">

  29. <link href="MMIX_002dSyntax.html#MMIX_002dSyntax" rel="prev" title="MMIX-Syntax">

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

  31. <!--

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  57. 

  58. 

  59. </head>

  60. 

  61. <body lang="en">

  62. <a name="MMIX_002dChars"></a>

  63. <div class="header">

  64. <p>

  65. Next: <a href="MMIX_002dSymbols.html#MMIX_002dSymbols" accesskey="n" rel="next">MMIX-Symbols</a>, Up: <a href="MMIX_002dSyntax.html#MMIX_002dSyntax" accesskey="u" rel="up">MMIX-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="Special-Characters-21"></a>

  69. <h4 class="subsubsection">9.28.3.1 Special Characters</h4>

  70. <a name="index-line-comment-characters_002c-MMIX"></a>

  71. <a name="index-MMIX-line-comment-characters"></a>

  72. 

  73. <p>The characters &lsquo;<samp>*</samp>&rsquo; and &lsquo;<samp>#</samp>&rsquo; are line comment characters; each

  74. start a comment at the beginning of a line, but only at the beginning of a

  75. line.  A &lsquo;<samp>#</samp>&rsquo; prefixes a hexadecimal number if found elsewhere on a

  76. line.  If a &lsquo;<samp>#</samp>&rsquo; appears at the start of a line the whole line is

  77. treated as a comment, but the line can also act as a logical line

  78. number directive (see <a href="Comments.html#Comments">Comments</a>) or a preprocessor control command

  79. (see <a href="Preprocessing.html#Preprocessing">Preprocessing</a>).

  80. </p>

  81. <p>Two other characters, &lsquo;<samp>%</samp>&rsquo; and &lsquo;<samp>!</samp>&rsquo;, each start a comment anywhere

  82. on the line.  Thus you can&rsquo;t use the &lsquo;<samp>modulus</samp>&rsquo; and &lsquo;<samp>not</samp>&rsquo;

  83. operators in expressions normally associated with these two characters.

  84. </p>

  85. <p>A &lsquo;<samp>;</samp>&rsquo; is a line separator, treated as a new-line, so separate

  86. instructions can be specified on a single line.

  87. </p>

  88. 

  89. 

  90. 

  91. </body>

  92. </html>