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[Bug middle-end/31723] Use reciprocal and reciprocal square root with -ffast-math
- From: "ubizjak at gmail dot com" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 10 Jun 2007 10:47:42 -0000
- Subject: [Bug middle-end/31723] Use reciprocal and reciprocal square root with -ffast-math
- References: <bug-31723-11659@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #12 from ubizjak at gmail dot com 2007-06-10 10:47 -------
Here are the results of mubench insn timings for various x86 processors:
http://mubench.sourceforge.net/results.html (target processor can be
benchmarked by downloading mubench from
http://mubench.sourceforge.net/index.html).
And finally an interesting read how commercial compilers trade accurracy for
speed (please read at least about SPEC2006 benchmark):
http://www.hpcwire.com/hpc/1556972.html
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ubizjak at gmail dot com changed:
What |Removed |Added
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CC| |ubizjak at gmail dot com
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=31723