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Re: Torbjorn's ieeelib.c
- From: Anthony Green <green at redhat dot com>
- To: Mark Mitchell <mark at codesourcery dot com>
- Cc: gcc mailing list <gcc at gcc dot gnu dot org>, "Joseph S. Myers" <joseph at codesourcery dot com>
- Date: Tue, 29 Nov 2005 12:36:30 -0800
- Subject: Re: Torbjorn's ieeelib.c
- References: <438BB76E.8070905@codesourcery.com>
On Mon, 2005-11-28 at 18:05 -0800, Mark Mitchell wrote:
> That message contains an IEEE floating-point emulation library, like
> fp-bit.c. Howeve, the performance is considerably better; Joseph
> measured against fp-bit.c with a modern compiler, and ieeelib.c is about
> 10-15% better than the current code on EEMBC on a PowerPC 440.
I did some benchmarking a year or two ago with Torbjorn's library and
found good results as well. However, there was pushback on merging this
in from the GCC hackers I spoke with because they saw glibc's FP
emulation library as an even better solution, and implied there was some
effort underway to move glibc's code into libgcc (perhaps there were
licensing issues to resolve - I forget the details).
If glibc really does offer a better solution, perhaps that would be the
best path forward for GCC.
AG