From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 17321 invoked by alias); 23 Aug 2013 03:46:40 -0000 Mailing-List: contact libc-ports-help@sourceware.org; run by ezmlm Precedence: bulk List-Id: List-Subscribe: List-Post: List-Help: , Sender: libc-ports-owner@sourceware.org Received: (qmail 17301 invoked by uid 89); 23 Aug 2013 03:46:40 -0000 X-Spam-SWARE-Status: No, score=0.2 required=5.0 tests=AWL,BAYES_00,KHOP_DYNAMIC2,RDNS_DYNAMIC,TVD_RCVD_IP autolearn=no version=3.3.2 X-Spam-User: qpsmtpd, 2 recipients Received: from 216-12-86-13.cv.mvl.ntelos.net (HELO brightrain.aerifal.cx) (216.12.86.13) by sourceware.org (qpsmtpd/0.84/v0.84-167-ge50287c) with ESMTP; Fri, 23 Aug 2013 03:46:20 +0000 Received: from dalias by brightrain.aerifal.cx with local (Exim 3.15 #2) id 1VCiKH-0001eT-00; Fri, 23 Aug 2013 03:46:17 +0000 Date: Fri, 23 Aug 2013 03:46:00 -0000 To: "Maciej W. Rozycki" Cc: libc-ports@sourceware.org, libc-alpha@sourceware.org, Doug Gilmore Subject: Re: [RFC][PATCH] MIPS: IEEE 754-2008 NaN encoding support Message-ID: <20130823034617.GP20515@brightrain.aerifal.cx> References: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.21 (2010-09-15) From: Rich Felker X-SW-Source: 2013-08/txt/msg00036.txt.bz2 On Fri, Aug 23, 2013 at 12:52:43AM +0100, Maciej W. Rozycki wrote: > As from revision 3.50 [2][3] the MIPS Architecture provides for > processors that support the IEEE 754-2008 preferred NaN encoding format. > As the two formats (further referred to as "legacy NaN" and "2008 NaN") > are incompatible to each other, tools will have to provide support for the > two formats to help people avoid using incompatible binary modules. Here > is the glibc part. > [...] > References: > > [1] "IEEE Standard for Floating-Point Arithmetic", IEEE Computer Society, > IEEE Std 754-2008, 29 August 2008 > > [2] "MIPS Architecture For Programmers, Volume I-A: Introduction to the > MIPS32 Architecture", MIPS Technologies, Inc., Document Number: > MD00082, Revision 3.50, September 20, 2012 > > [3] "MIPS Architecture For Programmers, Volume I-A: Introduction to the > MIPS64 Architecture", MIPS Technologies, Inc., Document Number: > MD00083, Revision 3.50, September 20, 2012 These documents do not seem to be publicly available; I can only mind much older versions online, such as 0.95: http://www.ece.lsu.edu/ee4720/mips64v1.pdf Perhaps you could quote some of the relevant text? Rich