<html lang="en"> <head> <title>RX-Directives - Using as</title> <meta http-equiv="Content-Type" content="text/html"> <meta name="description" content="Using as"> <meta name="generator" content="makeinfo 4.13"> <link title="Top" rel="start" href="index.html#Top"> <link rel="up" href="RX_002dDependent.html#RX_002dDependent" title="RX-Dependent"> <link rel="prev" href="RX_002dModifiers.html#RX_002dModifiers" title="RX-Modifiers"> <link rel="next" href="RX_002dFloat.html#RX_002dFloat" title="RX-Float"> <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage"> <!-- This file documents the GNU Assembler "as". Copyright (C) 1991-2015 Free Software Foundation, Inc. Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.3 or any later version published by the Free Software Foundation; with no Invariant Sections, with no Front-Cover Texts, and with no Back-Cover Texts. A copy of the license is included in the section entitled ``GNU Free Documentation License''. --> <meta http-equiv="Content-Style-Type" content="text/css"> <style type="text/css"><!-- pre.display { font-family:inherit } pre.format { font-family:inherit } pre.smalldisplay { font-family:inherit; font-size:smaller } pre.smallformat { font-family:inherit; font-size:smaller } pre.smallexample { font-size:smaller } pre.smalllisp { font-size:smaller } span.sc { font-variant:small-caps } span.roman { font-family:serif; font-weight:normal; } span.sansserif { font-family:sans-serif; font-weight:normal; } --></style> </head> <body> <div class="node"> <a name="RX-Directives"></a> <a name="RX_002dDirectives"></a> <p> Next: <a rel="next" accesskey="n" href="RX_002dFloat.html#RX_002dFloat">RX-Float</a>, Previous: <a rel="previous" accesskey="p" href="RX_002dModifiers.html#RX_002dModifiers">RX-Modifiers</a>, Up: <a rel="up" accesskey="u" href="RX_002dDependent.html#RX_002dDependent">RX-Dependent</a> <hr> </div> <h4 class="subsection">9.37.3 Assembler Directives</h4> <p><a name="index-assembler-directives_002c-RX-1858"></a><a name="index-RX-assembler-directives-1859"></a> The RX version of <code>as</code> has the following specific assembler directives: <dl> <dt><code>.3byte</code><dd><a name="index-assembler-directive-_002e3byte_002c-RX-1860"></a><a name="index-RX-assembler-directive-_002e3byte-1861"></a>Inserts a 3-byte value into the output file at the current location. <br><dt><code>.fetchalign</code><dd><a name="index-assembler-directive-_002efetchalign_002c-RX-1862"></a><a name="index-RX-assembler-directive-_002efetchalign-1863"></a>If the next opcode following this directive spans a fetch line boundary (8 byte boundary), the opcode is aligned to that boundary. If the next opcode does not span a fetch line, this directive has no effect. Note that one or more labels may be between this directive and the opcode; those labels are aligned as well. Any inserted bytes due to alignment will form a NOP opcode. </dl> </body></html>