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[Bug target/32180] Paranoia UCB GSL TestFloat libm tests fail - accuracy of recent gcc math poor
- From: "rob1weld at aol dot com" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 7 Jun 2007 13:48:50 -0000
- Subject: [Bug target/32180] Paranoia UCB GSL TestFloat libm tests fail - accuracy of recent gcc math poor
- References: <bug-32180-13830@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #13 from rob1weld at aol dot com 2007-06-07 13:48 -------
One other thing:
When I build and test the origonal (un-modified) Paranoia with GCC I can
compile with different flags and get different results - but these are
"_similar_" flags :(
1 Defect 1 Flaw
-mmmx -msse -m3dnow
1 Defect
-msse2 -msse3 -mssse3 -msse4.1 -msse4.2 -msse4 -msse4a
The code for "-mmmx", "-msse", and "-m3dnow" produce worse result on the tests
than the other SSE flags - the results should be the same (only the FPU code
should differ and that should not alter the result of math operations since
they are all SSE and not 387).
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=32180