From: Marcin Dalecki <martin@dalecki.de>
To: Olivier Galibert <galibert@pobox.com>
Cc: Gabriel Dos Reis <gdr@integrable-solutions.net>,
Uros Bizjak <uros@kss-loka.si>,
Paul Koning <pkoning@equallogic.com>,
gcc@gcc.gnu.org
Subject: Re: Sine and Cosine Accuracy
Date: Fri, 27 May 2005 18:27:00 -0000 [thread overview]
Message-ID: <85C33105-4702-4A41-991A-45F3E1CC7004@dalecki.de> (raw)
In-Reply-To: <20050527133651.GA86424@dspnet.fr.eu.org>
On 2005-05-27, at 15:36, Olivier Galibert wrote:
> Floating point values represent intervals,
This is mathematically wrong. The basic concept is that the
calculations domain as given by floating point numbers is used
to *model* the real number calculus. Certain constrains apply of course.
But there isn't any concept of representation here. Just a mapping.
> and when the interval size is way bigger than 2pi any value in [-1,1]
> is a perfectably acceptable answer for sin or cos.
???
next prev parent reply other threads:[~2005-05-27 15:32 UTC|newest]
Thread overview: 86+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-05-26 23:31 Uros Bizjak
2005-05-26 23:52 ` Paul Koning
2005-05-26 23:56 ` Gabriel Dos Reis
2005-05-26 23:57 ` Steven Bosscher
2005-05-27 15:09 ` Olivier Galibert
2005-05-27 15:28 ` Vincent Lefevre
2005-05-27 18:27 ` Marcin Dalecki [this message]
-- strict thread matches above, loose matches on Subject: below --
2005-05-28 6:42 Menezes, Evandro
2005-05-28 4:32 Menezes, Evandro
2005-05-28 5:02 ` Scott Robert Ladd
2005-05-28 10:44 ` Gary Funck
2005-05-27 0:54 Menezes, Evandro
2005-05-27 0:54 ` Scott Robert Ladd
2005-05-27 12:42 ` Scott Robert Ladd
2005-05-27 0:39 Menezes, Evandro
2005-05-27 0:54 ` Scott Robert Ladd
2005-05-26 23:59 Menezes, Evandro
2005-05-27 15:19 ` Vincent Lefevre
2005-05-26 18:38 Morten Welinder
2005-05-26 20:58 ` Andrew Haley
2005-05-26 17:53 Morten Welinder
2005-05-26 18:10 ` Scott Robert Ladd
2005-05-26 18:22 ` Dave Korn
2005-05-26 18:49 ` Scott Robert Ladd
2005-05-26 19:28 ` Dave Korn
2005-05-26 16:05 Scott Robert Ladd
2005-05-26 16:09 ` Andrew Haley
2005-05-26 16:33 ` Scott Robert Ladd
2005-05-26 17:14 ` Andrew Haley
2005-05-26 17:01 ` Paolo Carlini
2005-05-26 17:23 ` Richard Henderson
2005-05-26 17:24 ` Scott Robert Ladd
2005-05-26 17:27 ` Paul Koning
2005-05-26 17:27 ` Scott Robert Ladd
2005-05-26 17:29 ` Dave Korn
2005-05-26 17:37 ` David Daney
2005-05-26 17:56 ` Dave Korn
2005-05-26 17:40 ` Scott Robert Ladd
2005-05-26 18:12 ` Paul Koning
2005-05-26 18:32 ` Scott Robert Ladd
2005-05-26 18:50 ` Paul Koning
2005-05-26 19:14 ` Andrew Pinski
2005-05-26 19:35 ` Scott Robert Ladd
2005-05-29 6:22 ` Geoffrey Keating
2005-05-31 14:34 ` Paul Koning
2005-05-31 22:58 ` Geoff Keating
2005-05-29 12:07 ` Roger Sayle
2005-05-30 15:34 ` Vincent Lefevre
2005-05-29 2:22 ` Kai Henningsen
2005-05-29 18:16 ` Marc Espie
2005-05-29 20:58 ` Georg Bauhaus
2005-05-30 15:19 ` Marc Espie
2005-05-30 17:26 ` Scott Robert Ladd
2005-05-30 17:18 ` Marc Espie
2005-05-30 18:11 ` Scott Robert Ladd
2005-05-30 17:31 ` Scott Robert Ladd
2005-05-31 3:10 ` chris jefferson
2005-05-31 12:17 ` Andrew Haley
2005-05-31 12:46 ` Scott Robert Ladd
2005-05-31 13:02 ` Andrew Haley
2005-05-31 13:34 ` Vincent Lefevre
2005-05-30 15:19 ` Gabriel Dos Reis
2005-05-30 15:35 ` Bernhard R. Link
2005-05-30 18:59 ` Scott Robert Ladd
2005-05-30 19:16 ` Georg Bauhaus
2005-05-30 19:17 ` Bernhard R. Link
2005-05-30 19:54 ` Georg Bauhaus
2005-05-30 20:04 ` Gabriel Dos Reis
2005-05-26 17:35 ` Kevin Handy
2005-05-26 17:41 ` Paul Koning
2005-05-26 20:26 ` Joseph S. Myers
2005-05-26 21:15 ` Gabriel Dos Reis
2005-05-26 21:17 ` Scott Robert Ladd
2005-05-26 23:25 ` Gabriel Dos Reis
2005-05-27 0:18 ` Scott Robert Ladd
2005-05-27 0:54 ` Gabriel Dos Reis
2005-05-27 11:29 ` Marcin Dalecki
2005-05-27 9:36 ` Marcin Dalecki
2005-05-27 10:48 ` Marcin Dalecki
2005-05-26 21:33 ` Richard Henderson
2005-05-27 0:05 ` Scott Robert Ladd
2005-05-27 0:43 ` Gabriel Dos Reis
2005-05-27 0:54 ` Scott Robert Ladd
2005-05-28 11:26 ` Russ Allbery
2005-05-27 13:56 ` Vincent Lefevre
2005-05-29 3:36 ` Kai Henningsen
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