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From: "pinskia at gcc dot gnu dot org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/31249] pseudo-optimzation with sincos/cexpi
Date: Sun, 18 Mar 2007 09:50:00 -0000	[thread overview]
Message-ID: <20070318094955.15258.qmail@sourceware.org> (raw)
In-Reply-To: <bug-31249-12313@http.gcc.gnu.org/bugzilla/>



------- Comment #1 from pinskia at gcc dot gnu dot org  2007-03-18 09:49 -------
The only reason why cexp is slow on PPC darwin is because the ABI is stupid. 
Complex float arguments are passed via the GPR and returned also the same way
instead of via the FPRs.  So you will get a transfer of registers.  This is
also true of PPC64 darwin, why they made the same mistake twice I have no idea,
guess they did not expect people to use complex that much.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=31249


  reply	other threads:[~2007-03-18  9:50 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 ` pinskia at gcc dot gnu dot org [this message]
2007-03-18 10:20 ` [Bug middle-end/31249] " 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
2009-12-04 17:10 ` [Bug middle-end/31249] pseudo-optimization " dominiq at lps dot ens dot fr

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