------- Additional Comments From jv244 at cam dot ac dot uk 2005-01-28 16:31 -------
> You could try "gfortran -O3 -mtune=pentium4 -ffast-math -mfpmath=sse > -ftree-loop-linear -ftree-vectorize yourcode.f90" and see if it helps. Unhappily, seems to make things slower: multgen/basic_mult> gfortran -O3 -mtune=pentium4 -ffast-math -mfpmath=sse -ftree-loop-linear -ftree-vectorize mult.f90 mult.f90:0: warning: SSE instruction set disabled, using 387 arithmetics multgen/basic_mult> ./a.out 60.3900000000000 10.2400000000000 whereas removing some of these flags helps a little multgen/basic_mult> gfortran -O3 -mtune=pentium4 -ffast-math mult.f90 multgen/basic_mult> ./a.out 56.4700000000000 10.2400000000000 -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=14741
