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[Bug fortran/40766] this fortran program is too slow
- From: "ubizjak at gmail dot com" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 16 Jul 2009 07:16:49 -0000
- Subject: [Bug fortran/40766] this fortran program is too slow
- References: <bug-40766-15353@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #11 from ubizjak at gmail dot com 2009-07-16 07:16 -------
(In reply to comment #6)
> Thus the question is really: Why are neither vmlsSinCos4 nor vmlsTan4 - nor for
> ACML vrs4_sincosf/vrsa_sincosf (vrs*_tan* does not exist) called?
Because sincos returns _TWO_ values and the vectorizer does not yet support
this. ASAP as the middle-end infrastructure is in place, we can stick
vectorized sincos in ix86_veclib* functions. See also [1] and [2], sincos part.
Perhaps you could motivate Richi to extend the vectorizer infrastructure ;)
[1]
http://software.intel.com/en-us/articles/implement-the-short-vector-math-library/
[2]
http://developer.amd.com/cpu/Libraries/acml/onlinehelp/Documents/Vector.html#Vector
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40766