You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.

RX_002dDirectives.html 4.1KB

3 years ago
123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101
  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. Copyright (C) 1991-2020 Free Software Foundation, Inc.
  5. Permission is granted to copy, distribute and/or modify this document
  6. under the terms of the GNU Free Documentation License, Version 1.3
  7. or any later version published by the Free Software Foundation;
  8. with no Invariant Sections, with no Front-Cover Texts, and with no
  9. Back-Cover Texts. A copy of the license is included in the
  10. section entitled "GNU Free Documentation License".
  11. -->
  12. <!-- Created by GNU Texinfo 6.5, http://www.gnu.org/software/texinfo/ -->
  13. <head>
  14. <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
  15. <title>RX-Directives (Using as)</title>
  16. <meta name="description" content="RX-Directives (Using as)">
  17. <meta name="keywords" content="RX-Directives (Using as)">
  18. <meta name="resource-type" content="document">
  19. <meta name="distribution" content="global">
  20. <meta name="Generator" content="makeinfo">
  21. <link href="index.html#Top" rel="start" title="Top">
  22. <link href="AS-Index.html#AS-Index" rel="index" title="AS Index">
  23. <link href="index.html#SEC_Contents" rel="contents" title="Table of Contents">
  24. <link href="RX_002dDependent.html#RX_002dDependent" rel="up" title="RX-Dependent">
  25. <link href="RX_002dFloat.html#RX_002dFloat" rel="next" title="RX-Float">
  26. <link href="RX_002dModifiers.html#RX_002dModifiers" rel="prev" title="RX-Modifiers">
  27. <style type="text/css">
  28. <!--
  29. a.summary-letter {text-decoration: none}
  30. blockquote.indentedblock {margin-right: 0em}
  31. blockquote.smallindentedblock {margin-right: 0em; font-size: smaller}
  32. blockquote.smallquotation {font-size: smaller}
  33. div.display {margin-left: 3.2em}
  34. div.example {margin-left: 3.2em}
  35. div.lisp {margin-left: 3.2em}
  36. div.smalldisplay {margin-left: 3.2em}
  37. div.smallexample {margin-left: 3.2em}
  38. div.smalllisp {margin-left: 3.2em}
  39. kbd {font-style: oblique}
  40. pre.display {font-family: inherit}
  41. pre.format {font-family: inherit}
  42. pre.menu-comment {font-family: serif}
  43. pre.menu-preformatted {font-family: serif}
  44. pre.smalldisplay {font-family: inherit; font-size: smaller}
  45. pre.smallexample {font-size: smaller}
  46. pre.smallformat {font-family: inherit; font-size: smaller}
  47. pre.smalllisp {font-size: smaller}
  48. span.nolinebreak {white-space: nowrap}
  49. span.roman {font-family: initial; font-weight: normal}
  50. span.sansserif {font-family: sans-serif; font-weight: normal}
  51. ul.no-bullet {list-style: none}
  52. -->
  53. </style>
  54. </head>
  55. <body lang="en">
  56. <a name="RX_002dDirectives"></a>
  57. <div class="header">
  58. <p>
  59. Next: <a href="RX_002dFloat.html#RX_002dFloat" accesskey="n" rel="next">RX-Float</a>, Previous: <a href="RX_002dModifiers.html#RX_002dModifiers" accesskey="p" rel="prev">RX-Modifiers</a>, Up: <a href="RX_002dDependent.html#RX_002dDependent" accesskey="u" rel="up">RX-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>
  60. </div>
  61. <hr>
  62. <a name="Assembler-Directives-6"></a>
  63. <h4 class="subsection">9.40.3 Assembler Directives</h4>
  64. <a name="index-assembler-directives_002c-RX"></a>
  65. <a name="index-RX-assembler-directives"></a>
  66. <p>The RX version of <code>as</code> has the following specific
  67. assembler directives:
  68. </p>
  69. <dl compact="compact">
  70. <dt><code>.3byte</code></dt>
  71. <dd><a name="index-assembler-directive-_002e3byte_002c-RX"></a>
  72. <a name="index-RX-assembler-directive-_002e3byte"></a>
  73. <p>Inserts a 3-byte value into the output file at the current location.
  74. </p>
  75. </dd>
  76. <dt><code>.fetchalign</code></dt>
  77. <dd><a name="index-assembler-directive-_002efetchalign_002c-RX"></a>
  78. <a name="index-RX-assembler-directive-_002efetchalign"></a>
  79. <p>If the next opcode following this directive spans a fetch line
  80. boundary (8 byte boundary), the opcode is aligned to that boundary.
  81. If the next opcode does not span a fetch line, this directive has no
  82. effect. Note that one or more labels may be between this directive
  83. and the opcode; those labels are aligned as well. Any inserted bytes
  84. due to alignment will form a NOP opcode.
  85. </p>
  86. </dd>
  87. </dl>
  88. </body>
  89. </html>