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: Machine Dependencies</title> 17 18<meta name="description" content="Using as: Machine Dependencies"> 19<meta name="keywords" content="Using as: Machine Dependencies"> 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="index.html#Top" rel="up" title="Top"> 28<link href="AArch64_002dDependent.html#AArch64_002dDependent" rel="next" title="AArch64-Dependent"> 29<link href="Defining-New-Object-Attributes.html#Defining-New-Object-Attributes" rel="previous" title="Defining New Object Attributes"> 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="Machine-Dependencies"></a> 64<div class="header"> 65<p> 66Next: <a href="Reporting-Bugs.html#Reporting-Bugs" accesskey="n" rel="next">Reporting Bugs</a>, Previous: <a href="Object-Attributes.html#Object-Attributes" accesskey="p" rel="previous">Object Attributes</a>, Up: <a href="index.html#Top" accesskey="u" rel="up">Top</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="Machine-Dependent-Features"></a> 70<h2 class="chapter">9 Machine Dependent Features</h2> 71 72<a name="index-machine-dependencies"></a> 73<p>The machine instruction sets are (almost by definition) different on 74each machine where <code>as</code> runs. Floating point representations 75vary as well, and <code>as</code> often supports a few additional 76directives or command-line options for compatibility with other 77assemblers on a particular platform. Finally, some versions of 78<code>as</code> support special pseudo-instructions for branch 79optimization. 80</p> 81<p>This chapter discusses most of these differences, though it does not 82include details on any machine’s instruction set. For details on that 83subject, see the hardware manufacturer’s manual. 84</p> 85<table class="menu" border="0" cellspacing="0"> 86<tr><td align="left" valign="top">• <a href="AArch64_002dDependent.html#AArch64_002dDependent" accesskey="1">AArch64-Dependent</a>:</td><td> </td><td align="left" valign="top">AArch64 Dependent Features 87</td></tr> 88<tr><td align="left" valign="top">• <a href="Alpha_002dDependent.html#Alpha_002dDependent" accesskey="2">Alpha-Dependent</a>:</td><td> </td><td align="left" valign="top">Alpha Dependent Features 89</td></tr> 90<tr><td align="left" valign="top">• <a href="ARC_002dDependent.html#ARC_002dDependent" accesskey="3">ARC-Dependent</a>:</td><td> </td><td align="left" valign="top">ARC Dependent Features 91</td></tr> 92<tr><td align="left" valign="top">• <a href="ARM_002dDependent.html#ARM_002dDependent" accesskey="4">ARM-Dependent</a>:</td><td> </td><td align="left" valign="top">ARM Dependent Features 93</td></tr> 94<tr><td align="left" valign="top">• <a href="AVR_002dDependent.html#AVR_002dDependent" accesskey="5">AVR-Dependent</a>:</td><td> </td><td align="left" valign="top">AVR Dependent Features 95</td></tr> 96<tr><td align="left" valign="top">• <a href="Blackfin_002dDependent.html#Blackfin_002dDependent" accesskey="6">Blackfin-Dependent</a>:</td><td> </td><td align="left" valign="top">Blackfin Dependent Features 97</td></tr> 98<tr><td align="left" valign="top">• <a href="BPF_002dDependent.html#BPF_002dDependent" accesskey="7">BPF-Dependent</a>:</td><td> </td><td align="left" valign="top">BPF Dependent Features 99</td></tr> 100<tr><td align="left" valign="top">• <a href="CR16_002dDependent.html#CR16_002dDependent" accesskey="8">CR16-Dependent</a>:</td><td> </td><td align="left" valign="top">CR16 Dependent Features 101</td></tr> 102<tr><td align="left" valign="top">• <a href="CRIS_002dDependent.html#CRIS_002dDependent" accesskey="9">CRIS-Dependent</a>:</td><td> </td><td align="left" valign="top">CRIS Dependent Features 103</td></tr> 104<tr><td align="left" valign="top">• <a href="C_002dSKY_002dDependent.html#C_002dSKY_002dDependent">C-SKY-Dependent</a>:</td><td> </td><td align="left" valign="top">C-SKY Dependent Features 105</td></tr> 106<tr><td align="left" valign="top">• <a href="D10V_002dDependent.html#D10V_002dDependent">D10V-Dependent</a>:</td><td> </td><td align="left" valign="top">D10V Dependent Features 107</td></tr> 108<tr><td align="left" valign="top">• <a href="D30V_002dDependent.html#D30V_002dDependent">D30V-Dependent</a>:</td><td> </td><td align="left" valign="top">D30V Dependent Features 109</td></tr> 110<tr><td align="left" valign="top">• <a href="Epiphany_002dDependent.html#Epiphany_002dDependent">Epiphany-Dependent</a>:</td><td> </td><td align="left" valign="top">EPIPHANY Dependent Features 111</td></tr> 112<tr><td align="left" valign="top">• <a href="H8_002f300_002dDependent.html#H8_002f300_002dDependent">H8/300-Dependent</a>:</td><td> </td><td align="left" valign="top">Renesas H8/300 Dependent Features 113</td></tr> 114<tr><td align="left" valign="top">• <a href="HPPA_002dDependent.html#HPPA_002dDependent">HPPA-Dependent</a>:</td><td> </td><td align="left" valign="top">HPPA Dependent Features 115</td></tr> 116<tr><td align="left" valign="top">• <a href="i386_002dDependent.html#i386_002dDependent">i386-Dependent</a>:</td><td> </td><td align="left" valign="top">Intel 80386 and AMD x86-64 Dependent Features 117</td></tr> 118<tr><td align="left" valign="top">• <a href="IA_002d64_002dDependent.html#IA_002d64_002dDependent">IA-64-Dependent</a>:</td><td> </td><td align="left" valign="top">Intel IA-64 Dependent Features 119</td></tr> 120<tr><td align="left" valign="top">• <a href="IP2K_002dDependent.html#IP2K_002dDependent">IP2K-Dependent</a>:</td><td> </td><td align="left" valign="top">IP2K Dependent Features 121</td></tr> 122<tr><td align="left" valign="top">• <a href="LM32_002dDependent.html#LM32_002dDependent">LM32-Dependent</a>:</td><td> </td><td align="left" valign="top">LM32 Dependent Features 123</td></tr> 124<tr><td align="left" valign="top">• <a href="M32C_002dDependent.html#M32C_002dDependent">M32C-Dependent</a>:</td><td> </td><td align="left" valign="top">M32C Dependent Features 125</td></tr> 126<tr><td align="left" valign="top">• <a href="M32R_002dDependent.html#M32R_002dDependent">M32R-Dependent</a>:</td><td> </td><td align="left" valign="top">M32R Dependent Features 127</td></tr> 128<tr><td align="left" valign="top">• <a href="M68K_002dDependent.html#M68K_002dDependent">M68K-Dependent</a>:</td><td> </td><td align="left" valign="top">M680x0 Dependent Features 129</td></tr> 130<tr><td align="left" valign="top">• <a href="M68HC11_002dDependent.html#M68HC11_002dDependent">M68HC11-Dependent</a>:</td><td> </td><td align="left" valign="top">M68HC11 and 68HC12 Dependent Features 131</td></tr> 132<tr><td align="left" valign="top">• <a href="S12Z_002dDependent.html#S12Z_002dDependent">S12Z-Dependent</a>:</td><td> </td><td align="left" valign="top">S12Z Dependent Features 133</td></tr> 134<tr><td align="left" valign="top">• <a href="Meta_002dDependent.html#Meta_002dDependent">Meta-Dependent </a>:</td><td> </td><td align="left" valign="top">Meta Dependent Features 135</td></tr> 136<tr><td align="left" valign="top">• <a href="MicroBlaze_002dDependent.html#MicroBlaze_002dDependent">MicroBlaze-Dependent</a>:</td><td> </td><td align="left" valign="top">MICROBLAZE Dependent Features 137</td></tr> 138<tr><td align="left" valign="top">• <a href="MIPS_002dDependent.html#MIPS_002dDependent">MIPS-Dependent</a>:</td><td> </td><td align="left" valign="top">MIPS Dependent Features 139</td></tr> 140<tr><td align="left" valign="top">• <a href="MMIX_002dDependent.html#MMIX_002dDependent">MMIX-Dependent</a>:</td><td> </td><td align="left" valign="top">MMIX Dependent Features 141</td></tr> 142<tr><td align="left" valign="top">• <a href="MSP430_002dDependent.html#MSP430_002dDependent">MSP430-Dependent</a>:</td><td> </td><td align="left" valign="top">MSP430 Dependent Features 143</td></tr> 144<tr><td align="left" valign="top">• <a href="NDS32_002dDependent.html#NDS32_002dDependent">NDS32-Dependent</a>:</td><td> </td><td align="left" valign="top">Andes NDS32 Dependent Features 145</td></tr> 146<tr><td align="left" valign="top">• <a href="NiosII_002dDependent.html#NiosII_002dDependent">NiosII-Dependent</a>:</td><td> </td><td align="left" valign="top">Altera Nios II Dependent Features 147</td></tr> 148<tr><td align="left" valign="top">• <a href="NS32K_002dDependent.html#NS32K_002dDependent">NS32K-Dependent</a>:</td><td> </td><td align="left" valign="top">NS32K Dependent Features 149</td></tr> 150<tr><td align="left" valign="top">• <a href="OpenRISC_002dDependent.html#OpenRISC_002dDependent">OpenRISC-Dependent</a>:</td><td> </td><td align="left" valign="top">OpenRISC 1000 Features 151</td></tr> 152<tr><td align="left" valign="top">• <a href="PDP_002d11_002dDependent.html#PDP_002d11_002dDependent">PDP-11-Dependent</a>:</td><td> </td><td align="left" valign="top">PDP-11 Dependent Features 153</td></tr> 154<tr><td align="left" valign="top">• <a href="PJ_002dDependent.html#PJ_002dDependent">PJ-Dependent</a>:</td><td> </td><td align="left" valign="top">picoJava Dependent Features 155</td></tr> 156<tr><td align="left" valign="top">• <a href="PPC_002dDependent.html#PPC_002dDependent">PPC-Dependent</a>:</td><td> </td><td align="left" valign="top">PowerPC Dependent Features 157</td></tr> 158<tr><td align="left" valign="top">• <a href="PRU_002dDependent.html#PRU_002dDependent">PRU-Dependent</a>:</td><td> </td><td align="left" valign="top">PRU Dependent Features 159</td></tr> 160<tr><td align="left" valign="top">• <a href="RISC_002dV_002dDependent.html#RISC_002dV_002dDependent">RISC-V-Dependent</a>:</td><td> </td><td align="left" valign="top">RISC-V Dependent Features 161</td></tr> 162<tr><td align="left" valign="top">• <a href="RL78_002dDependent.html#RL78_002dDependent">RL78-Dependent</a>:</td><td> </td><td align="left" valign="top">RL78 Dependent Features 163</td></tr> 164<tr><td align="left" valign="top">• <a href="RX_002dDependent.html#RX_002dDependent">RX-Dependent</a>:</td><td> </td><td align="left" valign="top">RX Dependent Features 165</td></tr> 166<tr><td align="left" valign="top">• <a href="S_002f390_002dDependent.html#S_002f390_002dDependent">S/390-Dependent</a>:</td><td> </td><td align="left" valign="top">IBM S/390 Dependent Features 167</td></tr> 168<tr><td align="left" valign="top">• <a href="SCORE_002dDependent.html#SCORE_002dDependent">SCORE-Dependent</a>:</td><td> </td><td align="left" valign="top">SCORE Dependent Features 169</td></tr> 170<tr><td align="left" valign="top">• <a href="SH_002dDependent.html#SH_002dDependent">SH-Dependent</a>:</td><td> </td><td align="left" valign="top">Renesas / SuperH SH Dependent Features 171</td></tr> 172<tr><td align="left" valign="top">• <a href="Sparc_002dDependent.html#Sparc_002dDependent">Sparc-Dependent</a>:</td><td> </td><td align="left" valign="top">SPARC Dependent Features 173</td></tr> 174<tr><td align="left" valign="top">• <a href="TIC54X_002dDependent.html#TIC54X_002dDependent">TIC54X-Dependent</a>:</td><td> </td><td align="left" valign="top">TI TMS320C54x Dependent Features 175</td></tr> 176<tr><td align="left" valign="top">• <a href="TIC6X_002dDependent.html#TIC6X_002dDependent">TIC6X-Dependent </a>:</td><td> </td><td align="left" valign="top">TI TMS320C6x Dependent Features 177</td></tr> 178<tr><td align="left" valign="top">• <a href="TILE_002dGx_002dDependent.html#TILE_002dGx_002dDependent">TILE-Gx-Dependent </a>:</td><td> </td><td align="left" valign="top">Tilera TILE-Gx Dependent Features 179</td></tr> 180<tr><td align="left" valign="top">• <a href="TILEPro_002dDependent.html#TILEPro_002dDependent">TILEPro-Dependent </a>:</td><td> </td><td align="left" valign="top">Tilera TILEPro Dependent Features 181</td></tr> 182<tr><td align="left" valign="top">• <a href="V850_002dDependent.html#V850_002dDependent">V850-Dependent</a>:</td><td> </td><td align="left" valign="top">V850 Dependent Features 183</td></tr> 184<tr><td align="left" valign="top">• <a href="Vax_002dDependent.html#Vax_002dDependent">Vax-Dependent</a>:</td><td> </td><td align="left" valign="top">VAX Dependent Features 185</td></tr> 186<tr><td align="left" valign="top">• <a href="Visium_002dDependent.html#Visium_002dDependent">Visium-Dependent</a>:</td><td> </td><td align="left" valign="top">Visium Dependent Features 187</td></tr> 188<tr><td align="left" valign="top">• <a href="WebAssembly_002dDependent.html#WebAssembly_002dDependent">WebAssembly-Dependent</a>:</td><td> </td><td align="left" valign="top">WebAssembly Dependent Features 189</td></tr> 190<tr><td align="left" valign="top">• <a href="XGATE_002dDependent.html#XGATE_002dDependent">XGATE-Dependent</a>:</td><td> </td><td align="left" valign="top">XGATE Dependent Features 191</td></tr> 192<tr><td align="left" valign="top">• <a href="XSTORMY16_002dDependent.html#XSTORMY16_002dDependent">XSTORMY16-Dependent</a>:</td><td> </td><td align="left" valign="top">XStormy16 Dependent Features 193</td></tr> 194<tr><td align="left" valign="top">• <a href="Xtensa_002dDependent.html#Xtensa_002dDependent">Xtensa-Dependent</a>:</td><td> </td><td align="left" valign="top">Xtensa Dependent Features 195</td></tr> 196<tr><td align="left" valign="top">• <a href="Z80_002dDependent.html#Z80_002dDependent">Z80-Dependent</a>:</td><td> </td><td align="left" valign="top">Z80 Dependent Features 197</td></tr> 198<tr><td align="left" valign="top">• <a href="Z8000_002dDependent.html#Z8000_002dDependent">Z8000-Dependent</a>:</td><td> </td><td align="left" valign="top">Z8000 Dependent Features 199</td></tr> 200</table> 201 202 203 204 205<hr> 206<div class="header"> 207<p> 208Next: <a href="Reporting-Bugs.html#Reporting-Bugs" accesskey="n" rel="next">Reporting Bugs</a>, Previous: <a href="Object-Attributes.html#Object-Attributes" accesskey="p" rel="previous">Object Attributes</a>, Up: <a href="index.html#Top" accesskey="u" rel="up">Top</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> 209</div> 210 211 212 213</body> 214</html> 215