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[Bug libstdc++/17140] Floating point output is slow
- From: "pinskia at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 21 Dec 2004 19:42:58 -0000
- Subject: [Bug libstdc++/17140] Floating point output is slow
- References: <20040823040835.17140.jlquinn@gcc.gnu.org>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Additional Comments From pinskia at gcc dot gnu dot org 2004-12-21 19:42 -------
(In reply to comment #31)
> The power4 segfault occurs in frexpl() in libc, which is a result of calling
> __builtin_frexpl() inside std::frexp(long double). I was wondering if it might
> be a problem in long double representation. I think ppc uses 64 bit long
> double, which made me think that it should be calling frexp under the covers
> rather than frexpl.
PPC AIX uses 128bit long doubles. There are a couple of different issues for 128bit long double
support in gcc for PPC, see PR 19019 for one of them, in fact that might be the problem here but I don't
know.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=17140