[Bug fortran/40766] this fortran program is too slow

ubizjak at gmail dot com gcc-bugzilla@gcc.gnu.org
Thu Jul 16 06:56:00 GMT 2009



------- Comment #10 from ubizjak at gmail dot com  2009-07-16 06:56 -------
(In reply to comment #6)

> Thus with the GLIBC (with AMD patches) or with the AMCL, one gets only a
> slowdown of 25%, which is still acceptable. Why the Intel routines are so slow
> on my AMD, I do not know.

See [1], section 12.1, CPU dispatching in Intel compiler, on how to hack around
this issue.

[1] http://www.agner.org/optimize/optimizing_cpp.pdf


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40766



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