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[Bug libstdc++/48738] pow() fails to produce (some) subnormalized numbers with integer exponents
- From: "paolo.carlini at oracle dot com" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Sat, 23 Apr 2011 20:26:52 +0000
- Subject: [Bug libstdc++/48738] pow() fails to produce (some) subnormalized numbers with integer exponents
- Auto-submitted: auto-generated
- References: <bug-48738-4@http.gcc.gnu.org/bugzilla/>
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48738
--- Comment #4 from Paolo Carlini <paolo.carlini at oracle dot com> 2011-04-23 20:26:47 UTC ---
I'm following with interest the numerical analysis side of the discussion, but
I have to add that, *as a libstc++-v3 proper* issue, as mentioned by Richard,
the issue is moot, because in currently active release branches either the
library uses a front-end builtin (__builtin_powi*) or just pow unconditionally
(in C++0x mode). In other terms, *minimal* open-coding in the library for these
functions (and we mean to stick to this general design choice, AFAIK)