From: Joseph Myers <joseph@codesourcery.com>
To: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>
Cc: Chris Metcalf <cmetcalf@mellanox.com>,
GNU C Library <libc-alpha@sourceware.org>
Subject: Re: RFC: remove the "tile" architecture from glibc
Date: Mon, 04 Dec 2017 19:02:00 -0000 [thread overview]
Message-ID: <alpine.DEB.2.20.1712041858250.16372@digraph.polyomino.org.uk> (raw)
In-Reply-To: <f833be77-ec87-79ee-a1ab-65b3d2a4b810@physik.fu-berlin.de>
On Mon, 4 Dec 2017, John Paul Adrian Glaubitz wrote:
> > Note there is at least one open bug for m68k glibc
> > <https://sourceware.org/bugzilla/show_bug.cgi?id=13742> concerning use of
> > fsincos instructions that are documented as inaccurate for large inputs.
> > I would not be entirely confident that emulators accurately reflect the
> > levels of accuracy or inaccuracy of such instructions in hardware.
>
> I have real hardware running, so I can help with this issue. Thanks
> for pointing me at the issue.
If there is a real problem here then the simplest fix may simply be
avoiding m68k-specific implementations of these functions and using the
generic ones instead (as was done on x86 / x86_64 some years ago).
(libm-test-ulps for m68k hasn't been updated since 2015. You'd need to
update it before the libm testsuite can usefully identify other problems
that may be present.)
--
Joseph S. Myers
joseph@codesourcery.com
next prev parent reply other threads:[~2017-12-04 19:02 UTC|newest]
Thread overview: 51+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-12-01 21:34 Chris Metcalf
2017-12-01 21:41 ` Joseph Myers
2017-12-01 21:57 ` John Paul Adrian Glaubitz
2017-12-01 22:11 ` Joseph Myers
2017-12-01 22:30 ` John Paul Adrian Glaubitz
2017-12-01 22:41 ` Joseph Myers
2017-12-02 15:15 ` John Paul Adrian Glaubitz
2017-12-04 11:10 ` Adhemerval Zanella
2017-12-04 11:28 ` John Paul Adrian Glaubitz
2017-12-04 18:03 ` Joseph Myers
2017-12-04 18:32 ` Adhemerval Zanella
2017-12-04 18:55 ` Joseph Myers
2017-12-04 18:14 ` Chris Metcalf
2017-12-04 18:36 ` Adhemerval Zanella
2017-12-04 17:53 ` Joseph Myers
2017-12-04 18:47 ` John Paul Adrian Glaubitz
2017-12-04 19:02 ` Joseph Myers [this message]
[not found] ` <alpine.DEB.2.20.1801311732001.23883@digraph.polyomino.org.uk>
[not found] ` <38170271-e17f-0a7e-7dd2-06fa6ddfae62@physik.fu-berlin.de>
[not found] ` <9f8b994a-7085-e263-dd1b-bea2def55fb0@linaro.org>
2018-02-01 13:24 ` Adhemerval Zanella
2018-02-01 13:33 ` John Paul Adrian Glaubitz
2018-02-01 13:37 ` Adhemerval Zanella
2018-02-01 13:45 ` Joseph Myers
2018-02-01 16:40 ` Adhemerval Zanella
2018-02-01 13:39 ` Joseph Myers
2018-02-01 17:21 ` Adhemerval Zanella
2018-02-01 17:52 ` Joseph Myers
2018-02-01 18:30 ` Joseph Myers
2018-02-14 18:13 ` Joseph Myers
2018-02-01 13:34 ` Adhemerval Zanella
2018-02-01 13:50 ` Joseph Myers
2018-02-01 16:50 ` Adhemerval Zanella
2017-12-02 1:15 ` Chris Metcalf
2017-12-02 15:16 ` John Paul Adrian Glaubitz
2017-12-04 21:49 ` Chris Metcalf
2017-12-04 23:29 ` Joseph Myers
2018-03-07 15:39 ` Arnd Bergmann
2018-03-07 16:01 ` Joseph Myers
2018-03-07 16:08 ` John Paul Adrian Glaubitz
2018-03-07 16:49 ` Adhemerval Zanella
2018-03-07 17:17 ` Joseph Myers
2018-03-07 18:16 ` Helmut Grohne
2018-03-08 15:55 ` Arnd Bergmann
2018-03-08 16:06 ` John Paul Adrian Glaubitz
2018-03-08 16:23 ` Arnd Bergmann
2018-03-09 16:31 ` Joseph Myers
2018-03-09 16:37 ` John Paul Adrian Glaubitz
2018-03-09 16:53 ` Joseph Myers
2018-03-08 17:14 ` Palmer Dabbelt
2018-03-08 23:36 ` Arnd Bergmann
2017-12-02 3:24 ` Carlos O'Donell
2017-12-08 16:20 ` Chris Metcalf
2018-01-05 9:01 ` Henrik Grindal Bakken
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