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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: Sat, 14 Jul 2012 21:42:38 +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 #6 from bfriesen at simple dot dallas.tx.us 2012-07-14 21:42:38 UTC ---
Created attachment 27797
--> http://gcc.gnu.org/bugzilla/attachment.cgi?id=27797
Pre-processed GraphicsMagick source (effect.c).
In case the small sample (which only illustrates the core algorithm) does not
satisfy, I have attached a pre-processed version of the real GraphicsMagick
code with the performance issue. Look for ConvolveImage().