From: Manfred Spraul <manfred@colorfullife.com>
To: Horst von Brand <vonbrand@inf.utfsm.cl>
Cc: linux-kernel@vger.kernel.org
Subject: Re: How to use floating point in a module?
Date: Mon, 31 May 2004 22:38:30 +0200 [thread overview]
Message-ID: <40BB97C6.9020109@colorfullife.com> (raw)
Horst von Brand wrote:
>Trascendental functions are _not_ computed by series in practice, rational
>approximations (polinomial / polinomial) are used instead. Or interpolate
>in a smallish table.
>
Is that really faster on modern cpus? The multiplier is fully pipelined
and a division takes 25-40 cycles.
--
Manfred
next reply other threads:[~2004-05-31 20:38 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-05-31 20:38 Manfred Spraul [this message]
2004-05-31 21:11 ` How to use floating point in a module? Horst von Brand
-- strict thread matches above, loose matches on Subject: below --
2004-06-02 5:52 ndiamond
2004-06-02 19:31 ` Valdis.Kletnieks
2004-06-01 2:27 ndiamond
2004-06-01 0:38 ndiamond
2004-06-01 20:52 ` H. Peter Anvin
2004-05-31 2:50 ndiamond
2004-05-31 4:02 ` Chris Friesen
2004-05-31 5:44 ` Ian Kent
2004-05-31 6:13 ` Peter Williams
2004-05-31 13:39 ` Horst von Brand
2004-05-31 20:12 ` Michal Jaegermann
2004-05-31 20:23 ` Hugo Mills
2004-05-31 22:43 ` Peter Williams
2004-05-31 1:52 ndiamond
2004-05-31 2:18 ` Måns Rullgård
2004-05-30 22:39 ` Calvin Spealman
2004-05-31 4:28 ` Linus Torvalds
2004-05-31 3:57 ` Calvin Spealman
2004-05-31 3:59 ` Matt Mackall
2004-05-31 4:11 ` Stephen Smoogen
2004-05-31 14:55 ` Scott Robert Ladd
2004-06-01 2:11 ` Richard B. Johnson
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=40BB97C6.9020109@colorfullife.com \
--to=manfred@colorfullife.com \
--cc=linux-kernel@vger.kernel.org \
--cc=vonbrand@inf.utfsm.cl \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox