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[Bug target/34682] 70% slowdown with SSE enabled
- From: "ubizjak at gmail dot com" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 7 Jan 2008 14:09:33 -0000
- Subject: [Bug target/34682] 70% slowdown with SSE enabled
- References: <bug-34682-12238@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #7 from ubizjak at gmail dot com 2008-01-07 14:09 -------
Patched gcc:
387:
FLOPS C Program (Double Precision), V2.0 18 Dec 1992
Module Error RunTime MFLOPS
(usec)
1 -8.1208e-11 0.0128 1094.6170
2 -1.5485e-13 0.0061 1145.7086
SSE:
FLOPS C Program (Double Precision), V2.0 18 Dec 1992
Module Error RunTime MFLOPS
(usec)
1 4.0146e-13 0.0114 1227.3206
2 -1.4166e-13 0.0050 1399.9125
[ 2 -1.4166e-13 0.0269 260.2975 ]
So, 5.36x faster.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34682