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[Bug target/53967] GCC produces slow code for convolution algorithm with -mfpmath=sse (the AMD_64 default)
- From: "bfriesen at simple dot dallas.tx.us" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Wed, 18 Jul 2012 20:42:22 +0000
- Subject: [Bug target/53967] GCC produces slow code for convolution algorithm with -mfpmath=sse (the AMD_64 default)
- Auto-submitted: auto-generated
- References: <bug-53967-4@http.gcc.gnu.org/bugzilla/>
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53967
--- Comment #15 from bfriesen at simple dot dallas.tx.us 2012-07-18 20:42:22 UTC ---
Testing shows that using
-m64 -march=native -O2 -mfpmath=sse -frename-registers
is sufficient to restore good performance.