Hi Les,
> but suffice to day I get close to full
> 18-digit extended precision with Delphi 2.0-
> compiled code on pretty well every computer
> I have tested my code on (Pentium III, Pentium 4,
> Centrino, newer Celeron, old AMD Duron),
That's interesting. I have some Delphi2 code to generate
the series for Euler's Spiral which consistently produces
better results on an AMD Duron than on any Intel processor
I've tried. Clearly the AMD FPU is not an exact Intel clone.
Results are the same in Delphi5.
> Are there specific compiler directives I should be
> using to get my code to interface properly with
> the Athlon FPU?
Have you tried changing to the {$U-} option (no safe FDIV),
which shouldn't be needed for non-Pentium processors?
> should I just upgrade my Delphi (a costly option for
> a hobbyist, albeit a keen one)
Delphi2 is brilliant for hobbyists, engineering and mathematics.
Rock-solid code and smaller executables. Later Delphi versions
veer more and more towards database and net applications to
the point where the original amazing visual-Pascal is almost lost.
I suspect upgrading wouldn't make any difference to your results.
Sorry I've rambled on without actually helping with your problem.
I have a notebook with an AMD Turion64 processor which I have
never actually tested for maths stuff. I will try your code idea on
it and report back.
Martin.
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