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From: "dominiq at lps dot ens dot fr" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/31249] pseudo-optimzation with sincos/cexpi
Date: Wed, 21 Mar 2007 16:09:00 -0000 [thread overview]
Message-ID: <20070321160908.20093.qmail@sourceware.org> (raw)
In-Reply-To: <bug-31249-12313@http.gcc.gnu.org/bugzilla/>
------- Comment #18 from dominiq at lps dot ens dot fr 2007-03-21 16:09 -------
> It would be nice to know whether darwin does not implement cexp in an optimal way ...
I have forgotten to mention that I did some (quick) profiling: cexp seens
trivially implemented.
It calls sin, cos and exp + the ABI problem mentionned by Andrew. It seems
that any
inplementation of cexp calling sin and cos would at best lead to a draw and
more likely to
a regression in timing. Now I cannot rule out that on some platforms cexp is
implemented
in a clever way, using some kind of sincos alrgorithm (this is what I would
like to know).
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=31249
next prev parent reply other threads:[~2007-03-21 16:09 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-03-17 21:11 [Bug middle-end/31249] New: " dominiq at lps dot ens dot fr
2007-03-18 9:50 ` [Bug middle-end/31249] " pinskia at gcc dot gnu dot org
2007-03-18 10:20 ` dominiq at lps dot ens dot fr
2007-03-19 9:28 ` dominiq at lps dot ens dot fr
2007-03-19 10:43 ` rguenth at gcc dot gnu dot org
2007-03-19 12:44 ` dominiq at lps dot ens dot fr
2007-03-19 17:52 ` Andrew Pinski
2007-03-19 17:53 ` pinskia at gmail dot com
2007-03-20 11:04 ` rguenth at gcc dot gnu dot org
2007-03-20 13:57 ` dominiq at lps dot ens dot fr
2007-03-20 14:03 ` dominiq at lps dot ens dot fr
2007-03-20 14:26 ` rguenth at gcc dot gnu dot org
2007-03-20 14:58 ` dominiq at lps dot ens dot fr
2007-03-20 15:07 ` rguenth at gcc dot gnu dot org
2007-03-20 16:09 ` dominiq at lps dot ens dot fr
2007-03-20 16:12 ` rguenth at gcc dot gnu dot org
2007-03-20 16:14 ` pinskia at gcc dot gnu dot org
2007-03-21 15:36 ` dominiq at lps dot ens dot fr
2007-03-21 15:57 ` rguenth at gcc dot gnu dot org
2007-03-21 16:09 ` dominiq at lps dot ens dot fr [this message]
2009-12-04 17:10 ` [Bug middle-end/31249] pseudo-optimization " dominiq at lps dot ens dot fr
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