From mboxrd@z Thu Jan 1 00:00:00 1970 Received: by oss.sgi.com id ; Fri, 26 Jan 2001 05:01:44 -0800 Received: from [206.207.108.63] ([206.207.108.63]:313 "HELO ridgerun-lx.ridgerun.cxm") by oss.sgi.com with SMTP id ; Fri, 26 Jan 2001 05:01:29 -0800 Received: (qmail 9671 invoked from network); 26 Jan 2001 06:01:13 -0700 Received: from stevej-lx.ridgerun.cxm (HELO ridgerun.com) (stevej@192.168.1.4) by ridgerun-lx.ridgerun.cxm with SMTP; 26 Jan 2001 06:01:13 -0700 Message-ID: <3A717518.B1CAFEDC@ridgerun.com> Date: Fri, 26 Jan 2001 06:01:12 -0700 From: Steve Johnson Organization: Ridgerun, Inc. X-Mailer: Mozilla 4.76 [en] (X11; U; Linux 2.4.0-test12-bigphys i686) X-Accept-Language: en MIME-Version: 1.0 To: "Kevin D. Kissell" CC: Pete Popov , linux-mips@oss.sgi.com Subject: Re: floating point on Nevada cpu References: <3A6F8F66.6258801@mvista.com> <0101241833281Q.00834@plugh.sibyte.com> <3A6F9814.3E39027@mvista.com> <0101241917341S.00834@plugh.sibyte.com> <3A703E3C.360FB4FF@ridgerun.com> <3A706A22.6B760617@mvista.com> <010601c08780$d0b8a7a0$0deca8c0@Ulysses> Content-Type: multipart/mixed; boundary="------------CEBE8AED354B347F4A816CD7" Sender: owner-linux-mips@oss.sgi.com Precedence: bulk Return-Path: X-Orcpt: rfc822;linux-mips-outgoing This is a multi-part message in MIME format. --------------CEBE8AED354B347F4A816CD7 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit "Kevin D. Kissell" wrote: > I had essentially the same problem at MIPS a year or two ago, > and I could have *sworn* that my fix, which ORed ST0_FR into > the initial Status register value set in the startup assembly code, > had made it into the standard distributions. It's at about line 530 > of head.S, where a term is added to make the instruction > > li t1,~(ST0_CU1|ST0_CU2|ST0_CU3|ST0_KX|ST0_SX|ST0_FR) > > I spent days thinking it was a mipsel library problem, > because it only turned up when I tried exercising a > little-endian version of the same kernel that worked > sell big-endian on the Indy. But of course it was all > due to the mipsel system having a boot-prom that > cleverly enabled all the FP registers for me... > > Kevin K. Kevin, Your/Flo's/Ralf's thread in the MIPS Linux archives from last January was what clued me into the ST0_FR setting in the first place. Ralf gave arguments why he wouldn't take your change at that time, which is why that line isn't in the 2.4.x kernel. Steve --------------CEBE8AED354B347F4A816CD7 Content-Type: text/x-vcard; charset=us-ascii; name="stevej.vcf" Content-Transfer-Encoding: 7bit Content-Description: Card for Steve Johnson Content-Disposition: attachment; filename="stevej.vcf" begin:vcard n:Johnson;Steve tel;fax:208-331-2227 tel;work:208-331-2226x11 x-mozilla-html:TRUE url:http://www.ridgerun.com org:RidgeRun, Inc. version:2.1 email;internet:stevej@ridgerun.com title:Senior Kernel Developer adr;quoted-printable:;;RidgeRun, Inc.=0D=0A200 N 4th St, Suite 101 ;Boise;ID;83702;USA x-mozilla-cpt:;27936 fn:Steve Johnson end:vcard --------------CEBE8AED354B347F4A816CD7--