gcc/libm floating-point bug?

David Schultz das at FreeBSD.ORG
Tue May 20 11:00:09 PDT 2003


On Tue, May 20, 2003, Jon Lido wrote:
> Well, I do have a P4, and had built everything with -march=pentium4.  However, 
> rebuilding the kernel and modules with -march=pentium3 produces the same 
> results.

This isn't a kernel problem, so you need to rebuild libm and libc
without -march=pentium4.  You really don't want to be using the
Pentium 4 optimizations in gcc 3.2 anyway; the generated code is
generally slower.  gcc 3.3 has fixes for a number of the bugs, but
I don't know about the performance problems.


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