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: Xtensa Optimizations</title> 17 18<meta name="description" content="Using as: Xtensa Optimizations"> 19<meta name="keywords" content="Using as: Xtensa Optimizations"> 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_002dDependent.html#Xtensa_002dDependent" rel="up" title="Xtensa-Dependent"> 28<link href="Density-Instructions.html#Density-Instructions" rel="next" title="Density Instructions"> 29<link href="Xtensa-Registers.html#Xtensa-Registers" rel="previous" title="Xtensa Registers"> 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="Xtensa-Optimizations"></a> 64<div class="header"> 65<p> 66Next: <a href="Xtensa-Relaxation.html#Xtensa-Relaxation" accesskey="n" rel="next">Xtensa Relaxation</a>, Previous: <a href="Xtensa-Syntax.html#Xtensa-Syntax" accesskey="p" rel="previous">Xtensa Syntax</a>, Up: <a href="Xtensa_002dDependent.html#Xtensa_002dDependent" accesskey="u" rel="up">Xtensa-Dependent</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="Xtensa-Optimizations-1"></a> 70<h4 class="subsection">9.55.3 Xtensa Optimizations</h4> 71<a name="index-optimizations"></a> 72 73<p>The optimizations currently supported by <code>as</code> are 74generation of density instructions where appropriate and automatic 75branch target alignment. 76</p> 77<table class="menu" border="0" cellspacing="0"> 78<tr><td align="left" valign="top">• <a href="Density-Instructions.html#Density-Instructions" accesskey="1">Density Instructions</a>:</td><td> </td><td align="left" valign="top">Using Density Instructions. 79</td></tr> 80<tr><td align="left" valign="top">• <a href="Xtensa-Automatic-Alignment.html#Xtensa-Automatic-Alignment" accesskey="2">Xtensa Automatic Alignment</a>:</td><td> </td><td align="left" valign="top">Automatic Instruction Alignment. 81</td></tr> 82</table> 83 84 85 86 87</body> 88</html> 89