Messages in this thread | | | Date | Wed, 04 Jun 2008 14:49:50 -0700 (PDT) | Subject | Re: math-emu issue with fp divide | From | David Miller <> |
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From: "Joseph S. Myers" <joseph@codesourcery.com> Date: Wed, 4 Jun 2008 21:42:55 +0000 (UTC)
> On Wed, 4 Jun 2008, Kumar Gala wrote: > > > I'm trying to move the powerpc math-emu > > code to use the include/math-emu bits. > > I'd like to remind people that the include/math-emu code is based on an > old, buggy version of the soft-fp code in glibc. RTH previously noted > <http://sourceware.org/ml/libc-alpha/2006-02/msg00075.html> that the fixes > should go in the kernel, when approving a patch of mine fixing various > bugs and speeding up soft-fp, and several more bugs have been fixed since > then in the course of GCC work on soft-float for Power and __float128 > support for x86_64. > > So it may be better than the old code you're replacing, but it might still > be a good idea to merge things with the current glibc code, as a matter of > both correctness and performance. (And there may well still be bugs left > in the code.)
Once the GCC folks started looking into using the soft-fp bits I knew this situation would develop. The kernel side would have some set of fixes and the glibc/gcc side would have yet another set.
To be honest this doesn't surprise me...
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