On Fri, 28 Jan 2005, jv244 at cam dot ac dot uk wrote:
------- 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
You'd need -msse2 or -msse (or is it -march=pentium4 that enables these?)
