1<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> 2<html> 3<!-- Copyright (C) 1988-2021 Free Software Foundation, Inc. 4 5Permission is granted to copy, distribute and/or modify this document 6under the terms of the GNU Free Documentation License, Version 1.3 or 7any later version published by the Free Software Foundation; with the 8Invariant Sections being "Free Software" and "Free Software Needs 9Free Documentation", with the Front-Cover Texts being "A GNU Manual," 10and with the Back-Cover Texts as in (a) below. 11 12(a) The FSF's Back-Cover Text is: "You are free to copy and modify 13this GNU Manual. Buying copies from GNU Press supports the FSF in 14developing GNU and promoting software freedom." --> 15<!-- Created by GNU Texinfo 5.1, http://www.gnu.org/software/texinfo/ --> 16<head> 17<title>Debugging with GDB: NDS32 Features</title> 18 19<meta name="description" content="Debugging with GDB: NDS32 Features"> 20<meta name="keywords" content="Debugging with GDB: NDS32 Features"> 21<meta name="resource-type" content="document"> 22<meta name="distribution" content="global"> 23<meta name="Generator" content="makeinfo"> 24<meta http-equiv="Content-Type" content="text/html; charset=utf-8"> 25<link href="index.html#Top" rel="start" title="Top"> 26<link href="Concept-Index.html#Concept-Index" rel="index" title="Concept Index"> 27<link href="index.html#SEC_Contents" rel="contents" title="Table of Contents"> 28<link href="Standard-Target-Features.html#Standard-Target-Features" rel="up" title="Standard Target Features"> 29<link href="Nios-II-Features.html#Nios-II-Features" rel="next" title="Nios II Features"> 30<link href="M68K-Features.html#M68K-Features" rel="previous" title="M68K Features"> 31<style type="text/css"> 32<!-- 33a.summary-letter {text-decoration: none} 34blockquote.smallquotation {font-size: smaller} 35div.display {margin-left: 3.2em} 36div.example {margin-left: 3.2em} 37div.indentedblock {margin-left: 3.2em} 38div.lisp {margin-left: 3.2em} 39div.smalldisplay {margin-left: 3.2em} 40div.smallexample {margin-left: 3.2em} 41div.smallindentedblock {margin-left: 3.2em; font-size: smaller} 42div.smalllisp {margin-left: 3.2em} 43kbd {font-style:oblique} 44pre.display {font-family: inherit} 45pre.format {font-family: inherit} 46pre.menu-comment {font-family: serif} 47pre.menu-preformatted {font-family: serif} 48pre.smalldisplay {font-family: inherit; font-size: smaller} 49pre.smallexample {font-size: smaller} 50pre.smallformat {font-family: inherit; font-size: smaller} 51pre.smalllisp {font-size: smaller} 52span.nocodebreak {white-space:nowrap} 53span.nolinebreak {white-space:nowrap} 54span.roman {font-family:serif; font-weight:normal} 55span.sansserif {font-family:sans-serif; font-weight:normal} 56ul.no-bullet {list-style: none} 57--> 58</style> 59 60 61</head> 62 63<body lang="en" bgcolor="#FFFFFF" text="#000000" link="#0000FF" vlink="#800080" alink="#FF0000"> 64<a name="NDS32-Features"></a> 65<div class="header"> 66<p> 67Next: <a href="Nios-II-Features.html#Nios-II-Features" accesskey="n" rel="next">Nios II Features</a>, Previous: <a href="M68K-Features.html#M68K-Features" accesskey="p" rel="previous">M68K Features</a>, Up: <a href="Standard-Target-Features.html#Standard-Target-Features" accesskey="u" rel="up">Standard Target Features</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Concept-Index.html#Concept-Index" title="Index" rel="index">Index</a>]</p> 68</div> 69<hr> 70<a name="NDS32-Features-1"></a> 71<h4 class="subsection">G.5.8 NDS32 Features</h4> 72<a name="index-target-descriptions_002c-NDS32-features"></a> 73 74<p>The ‘<samp>org.gnu.gdb.nds32.core</samp>’ feature is required for NDS32 75targets. It should contain at least registers ‘<samp>r0</samp>’ through 76‘<samp>r10</samp>’, ‘<samp>r15</samp>’, ‘<samp>fp</samp>’, ‘<samp>gp</samp>’, ‘<samp>lp</samp>’, ‘<samp>sp</samp>’, 77and ‘<samp>pc</samp>’. 78</p> 79<p>The ‘<samp>org.gnu.gdb.nds32.fpu</samp>’ feature is optional. If present, 80it should contain 64-bit double-precision floating-point registers 81‘<samp>fd0</samp>’ through <em>fdN</em>, which should be ‘<samp>fd3</samp>’, ‘<samp>fd7</samp>’, 82‘<samp>fd15</samp>’, or ‘<samp>fd31</samp>’ based on the FPU configuration implemented. 83</p> 84<p><em>Note:</em> The first sixteen 64-bit double-precision floating-point 85registers are overlapped with the thirty-two 32-bit single-precision 86floating-point registers. The 32-bit single-precision registers, if 87not being listed explicitly, will be synthesized from halves of the 88overlapping 64-bit double-precision registers. Listing 32-bit 89single-precision registers explicitly is deprecated, and the 90support to it could be totally removed some day. 91</p> 92 93 94 95</body> 96</html> 97