------- Comment #13 from ubizjak at gmail dot com 2007-03-02 15:34 ------- Any news about this problem? Current mainline still has severe problems:
-msse3 -O2 -mfpmath=sse -ffast-math GCC 4.3 -ffast-math double performance: ALGORITHM NB REPS TIME MFLOPS ========= ===== ===== ========== ========== atlasmm 60 1000 0.288 1499.91 -msse3 -O2 -mfpmath=sse GCC 4.3 double performance: ALGORITHM NB REPS TIME MFLOPS ========= ===== ===== ========== ========== atlasmm 60 1000 0.192 2249.86 -msse3 -O2 -mfpmath=sse -ffast-math GCC 4.3 -ffast-math single performance: ALGORITHM NB REPS TIME MFLOPS ========= ===== ===== ========== ========== atlasmm 60 1000 0.304 1420.96 -msse3 -O2 -mfpmath=sse GCC 4.3 single performance: ALGORITHM NB REPS TIME MFLOPS ========= ===== ===== ========== ========== atlasmm 60 1000 0.172 2511.48 Please consider the fact that all benchmarks are using -ffast-math nowadays. ;) -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=27855