On 9/26/07, Ralf Lübben <[EMAIL PROTECTED]> wrote: > Hello, > > maybe this is the better list to post the problem (see below).
This is off-topic here, gcc-help would be a more appropriate list. > Regards > Ralf > > On Wednesday, 26. September 2007 18:23:34 Ralf Lübben wrote: > > Ok, > > > > the problems seems to be the pow() function. If I use instead the function > > gsl_pow_int(double x, int n) from the gsl library the performance on the > > x86_64 machine is much faster. > > I call the pow function with the following values: > > > > pow(5.0,-3.0); > > pow(10.0,-3.0); > > pow(15.0,-3.0); > > pow(20.0,-3.0); pow and gsl_pow_int don't compute the same thing. Use -ffast-math and gcc will do equivalent stuff. Richard.
