NetBSD Problem Report #50723
From www@NetBSD.org Fri Jan 29 01:47:59 2016
Return-Path: <www@NetBSD.org>
Received: from mail.netbsd.org (mail.NetBSD.org [199.233.217.200])
(using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits))
(Client CN "mail.netbsd.org", Issuer "Postmaster NetBSD.org" (verified OK))
by mollari.NetBSD.org (Postfix) with ESMTPS id 36AF97ABE4
for <gnats-bugs@gnats.NetBSD.org>; Fri, 29 Jan 2016 01:47:59 +0000 (UTC)
Message-Id: <20160129014758.266517ACAF@mollari.NetBSD.org>
Date: Fri, 29 Jan 2016 01:47:58 +0000 (UTC)
From: macallan@netbsd.org
Reply-To: macallan@netbsd.org
To: gnats-bugs@NetBSD.org
Subject: FPU handling in MIPS is broken
X-Send-Pr-Version: www-1.0
>Number: 50723
>Category: port-mips
>Synopsis: FPU handling in MIPS is broken
>Confidential: no
>Severity: critical
>Priority: high
>Responsible: port-mips-maintainer
>State: open
>Class: sw-bug
>Submitter-Id: net
>Arrival-Date: Fri Jan 29 01:50:00 +0000 2016
>Originator: Michael
>Release: 7.99.26
>Organization:
TNF
>Environment:
NetBSD ci20 7.99.26 NetBSD 7.99.26 (CI20) #125: Thu Jan 28 20:31:33 EST 2016 ml@blackbush:/home/build/obj_evbmips32/sys/arch/evbmips/compile/CI20 evbmips
>Description:
FPU registers get corrupted, looks exactly like powerpc/50037, can be triggered with the same test program.
I saw this only on CI20 ( MIPS32R2 ) so far, will check sgimips later.
>How-To-Repeat:
run the test program from powerpc/50037, get this:
~/fpu# cc -pipe -march=mips32r2 -o main main.c
~/fpu# ./main
diff: 2879.229316 - 2.000000 3.000000 6.000000 6.000000 2879.229316
00 f8 ec 68 75 7e a6 40
diff: 2155.314669 - 2.000000 3.000000 6.000000 6.000000 2155.314669
00 3c 4a 1c a1 d6 a0 40
diff: 2886.203915 - 2.000000 3.000000 6.000000 6.000000 0.000000
00 80 7b 67 68 8c a6 40
diff: 0.001020 - 2.000000 3.000000 6.000000 6.000000 0.001020
28 67 8e 04 f3 b5 50 3f
diff: 4717.457986 - 2.000000 3.000000 6.000000 6.000000 4717.457986
00 02 98 3e 75 6d b2 40
diff: 5544.622506 - 2.000000 3.000000 6.000000 6.000000 5544.622506
00 c6 89 5c 9f a8 b5 40
diff: 5965532835022.678711 - 2.000000 3.000000 5965532835028.678711 6.000000 -5965532835022.678711
b7 3a b3 dc d5 b3 95 42
>Fix:
(Contact us)
$NetBSD: query-full-pr,v 1.39 2013/11/01 18:47:49 spz Exp $
$NetBSD: gnats_config.sh,v 1.8 2006/05/07 09:23:38 tsutsui Exp $
Copyright © 1994-2014
The NetBSD Foundation, Inc. ALL RIGHTS RESERVED.