http://gcc.gnu.org/bugzilla/show_bug.cgi?id=31897
Richard Guenther changed:
What|Removed |Added
Status|NEW |RESOLVED
Resolution|
--- Comment #18 from rguenth at gcc dot gnu dot org 2010-05-22 18:11
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GCC 4.3.5 is being released, adjusting target milestone.
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rguenth at gcc dot gnu dot org changed:
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--- Comment #17 from rguenth at gcc dot gnu dot org 2009-08-04 12:28
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GCC 4.3.4 is being released, adjusting target milestone.
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rguenth at gcc dot gnu dot org changed:
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--- Comment #16 from rguenth at gcc dot gnu dot org 2009-01-24 10:19
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GCC 4.3.3 is being released, adjusting target milestone.
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rguenth at gcc dot gnu dot org changed:
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--- Comment #15 from jsm28 at gcc dot gnu dot org 2008-08-27 22:01 ---
4.3.2 is released, changing milestones to 4.3.3.
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jsm28 at gcc dot gnu dot org changed:
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--- Comment #14 from ubizjak at gmail dot com 2008-08-23 20:07 ---
Looking at http://users.physik.fu-berlin.de/~tburnus/gcc-trunk/benchmark/, it
looks that the problem was mysteriously fixed in recent mainline.
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ubizjak at gmail dot com changed:
What|Removed
--- Comment #11 from hubicka at gcc dot gnu dot org 2008-01-30 16:04
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If you have nothing against, I would probably go for -mfpmath=sse implied by
-ftree-vectorize route then.
Since there is now i386 ABI mailing list I hope if we can move in direction of
having -mfpmath=sse by defau
--- Comment #10 from ubizjak at gmail dot com 2008-01-19 16:31 ---
(In reply to comment #9)
> Does the regression on C2 duo show even without vectorizing? It looks like
> generic SSE fpmath performance issue. There should be no reason why SSE math
> in combination with SSE vectorizatio
--- Comment #9 from hubicka at gcc dot gnu dot org 2008-01-19 12:03 ---
Does the regression on C2 duo show even without vectorizing? It looks like
generic SSE fpmath performance issue. There should be no reason why SSE math
in combination with SSE vectorization should result in regress
--- Comment #8 from ubizjak at gmail dot com 2007-12-21 18:57 ---
Confirmed on K8 at http://gcc.gnu.org/ml/gcc-patches/2007-12/msg01042.html
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ubizjak at gmail dot com changed:
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--- Comment #7 from ubizjak at gmail dot com 2007-10-19 17:53 ---
(In reply to comment #6)
> It is little bit sick, but what about implying -mfpmath=sse when
> -ftree-vectorize is used and SSE is available?
Then you will hit Core2 Duo, that shows the opposite in 32bit and 64bit mode:
-
--- Comment #6 from hubicka at gcc dot gnu dot org 2007-10-09 14:54 ---
It is little bit sick, but what about implying -mfpmath=sse when
-ftree-vectorize is used and SSE is available?
The reason why we don't default to fpmath=sse is because the extra precision is
told to be part of i386
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mmitchel at gcc dot gnu dot org changed:
What|Removed |Added
Priority|P3 |P2
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=31897
--- Comment #5 from ubizjak at gmail dot com 2007-07-18 12:05 ---
The problem is in cptrf2 function when both -mfpmath=387 and -ftree-vectorize
are used.
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=31897
--- Comment #4 from ubizjak at gmail dot com 2007-07-04 12:32 ---
(In reply to comment #1)
> gfortran -ffast-math -funroll-loops -O3 -msse3 -mfpmath=387 rnflow.f90
>
> time ./a.out
> user0m37.982s
> gfortran -ffast-math -funroll-loops -O3 -msse3 -mfpmath=387 -ftree-vectorize
> rnfl
--- Comment #3 from ubizjak at gmail dot com 2007-07-04 12:29 ---
(In reply to comment #2)
> Can't reproduce this, gcc 4.3 actually seems to be faster (tests done on Intel
> quadcore Core2):
On core2 the bug doesn't trigger, but it shows on FC4 with:
vendor_id : GenuineIntel
cpu
--- Comment #2 from jakub at gcc dot gnu dot org 2007-07-04 11:57 ---
Can't reproduce this, gcc 4.3 actually seems to be faster (tests done on Intel
quadcore Core2):
/usr/src/gcc-4.2/obj/gcc/gfortran -B /usr/src/gcc-4.2/obj/gcc/ -L
/usr/src/gcc-4.2/obj/x86_64-unknown-linux-gnu/32/libgfor
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pinskia at gcc dot gnu dot org changed:
What|Removed |Added
CC||pinskia at gcc dot gnu dot
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