------- Comment #5 from ubizjak at gmail dot com 2007-11-30 10:27 ------- gfortran -march=opteron -ffast-math -funroll-loops -ftree-loop-linear -msse3 -O3 -mfpmath=sse induct.f90: user 1m32.226s gfortran -march=opteron -ffast-math -funroll-loops -ftree-loop-linear -msse3 -O3 -mfpmath=sse -fno-tree-vectorize induct.f90 user 0m58.492s fortran -march=opteron -ffast-math -funroll-loops -ftree-loop-linear -msse3 -O3 -mfpmath=387 induct.f90 user 1m40.906s gfortran -march=opteron -ffast-math -funroll-loops -ftree-loop-linear -msse3 -O3 -mfpmath=387 -fno-tree-vectorize induct.f90 user 0m46.439s gfortran -march=opteron -ffast-math -funroll-loops -ftree-loop-linear -msse3 -O3 -mfpmath=sse -fvect-cost-model induct.f90 user 0m58.168s gfortran -march=opteron -ffast-math -funroll-loops -ftree-loop-linear -msse3 -O3 -mfpmath=387 -fvect-cost-model induct.f90 user 0m46.415s
All on: Family: 15 Model: 4 Stepping: 10 Type: 0 Brand: 0 CPU Model: Pentium 4 D (Foster) Original OEM Processor name string: Intel(R) Xeon(TM) CPU 3.60GHz (so -march=opteron is a bit misleading) I'd say that vectorizer cost model is doing its job pretty well. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=32086
