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 5Copyright (C) 1991-2021 Free Software Foundation, Inc. 6 7Permission is granted to copy, distribute and/or modify this document 8under the terms of the GNU Free Documentation License, Version 1.3 9or any later version published by the Free Software Foundation; 10with no Invariant Sections, with no Front-Cover Texts, and with no 11Back-Cover Texts. A copy of the license is included in the 12section entitled "GNU Free Documentation License". 13 --> 14<!-- Created by GNU Texinfo 5.1, http://www.gnu.org/software/texinfo/ --> 15<head> 16<title>Using as: Absolute Literals Directive</title> 17 18<meta name="description" content="Using as: Absolute Literals Directive"> 19<meta name="keywords" content="Using as: Absolute Literals Directive"> 20<meta name="resource-type" content="document"> 21<meta name="distribution" content="global"> 22<meta name="Generator" content="makeinfo"> 23<meta http-equiv="Content-Type" content="text/html; charset=utf-8"> 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="Xtensa-Directives.html#Xtensa-Directives" rel="up" title="Xtensa Directives"> 28<link href="Z80_002dDependent.html#Z80_002dDependent" rel="next" title="Z80-Dependent"> 29<link href="Literal-Prefix-Directive.html#Literal-Prefix-Directive" rel="previous" title="Literal Prefix Directive"> 30<style type="text/css"> 31<!-- 32a.summary-letter {text-decoration: none} 33blockquote.smallquotation {font-size: smaller} 34div.display {margin-left: 3.2em} 35div.example {margin-left: 3.2em} 36div.indentedblock {margin-left: 3.2em} 37div.lisp {margin-left: 3.2em} 38div.smalldisplay {margin-left: 3.2em} 39div.smallexample {margin-left: 3.2em} 40div.smallindentedblock {margin-left: 3.2em; font-size: smaller} 41div.smalllisp {margin-left: 3.2em} 42kbd {font-style:oblique} 43pre.display {font-family: inherit} 44pre.format {font-family: inherit} 45pre.menu-comment {font-family: serif} 46pre.menu-preformatted {font-family: serif} 47pre.smalldisplay {font-family: inherit; font-size: smaller} 48pre.smallexample {font-size: smaller} 49pre.smallformat {font-family: inherit; font-size: smaller} 50pre.smalllisp {font-size: smaller} 51span.nocodebreak {white-space:nowrap} 52span.nolinebreak {white-space:nowrap} 53span.roman {font-family:serif; font-weight:normal} 54span.sansserif {font-family:sans-serif; font-weight:normal} 55ul.no-bullet {list-style: none} 56--> 57</style> 58 59 60</head> 61 62<body lang="en" bgcolor="#FFFFFF" text="#000000" link="#0000FF" vlink="#800080" alink="#FF0000"> 63<a name="Absolute-Literals-Directive"></a> 64<div class="header"> 65<p> 66Previous: <a href="Literal-Prefix-Directive.html#Literal-Prefix-Directive" accesskey="p" rel="previous">Literal Prefix Directive</a>, Up: <a href="Xtensa-Directives.html#Xtensa-Directives" accesskey="u" rel="up">Xtensa Directives</a> [<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> 67</div> 68<hr> 69<a name="absolute_002dliterals"></a> 70<h4 class="subsubsection">9.55.5.7 absolute-literals</h4> 71<a name="index-absolute_002dliterals-directive"></a> 72<a name="index-no_002dabsolute_002dliterals-directive"></a> 73 74<p>The <code>absolute-literals</code> and <code>no-absolute-literals</code> 75directives control the absolute vs. PC-relative mode for <code>L32R</code> 76instructions. These are relevant only for Xtensa configurations that 77include the absolute addressing option for <code>L32R</code> instructions. 78</p> 79<div class="smallexample"> 80<pre class="smallexample"> .begin [no-]absolute-literals 81 .end [no-]absolute-literals 82</pre></div> 83 84<p>These directives do not change the <code>L32R</code> mode—they only cause 85the assembler to emit the appropriate kind of relocation for <code>L32R</code> 86instructions and to place the literal values in the appropriate section. 87To change the <code>L32R</code> mode, the program must write the 88<code>LITBASE</code> special register. It is the programmer’s responsibility 89to keep track of the mode and indicate to the assembler which mode is 90used in each region of code. 91</p> 92<p>If the Xtensa configuration includes the absolute <code>L32R</code> addressing 93option, the default is to assume absolute <code>L32R</code> addressing unless 94the ‘<samp>--no-absolute-literals</samp>’ command-line option is specified. 95Otherwise, the default is to assume PC-relative <code>L32R</code> addressing. 96The <code>absolute-literals</code> directive can then be used to override 97the default determined by the command-line options. 98</p> 99 100 101 102 103 104</body> 105</html> 106