Re: ObjectAda and Long_Long_Float

[Adam Beneschan <adam@irvine.com>]

On Dec 5, 5:12 am, axtens <Bruce.Axt...@gmail.com> wrote:
> G'day everyone,
>
> In Dmitry Kazakov's Intervals package, he was a file,
> Float_Intervals.ads which contains:
>
> with Intervals.Floats;
> package Float_Intervals is new Intervals.Floats (Float);
>
> Today I put Long_Float in between the parentheses instead of Float,
> tweaked a few things in my project and now I've got better precision.
> If I want to increase the precision, what else can in put in there?
> "digits 36"?

That's going to depend on the processor.  Generally, assuming that a
processor supports floating-point instructions, then your Ada compiler
will probably support whatever floating-point formats are natively
supported by that processor---but no others.  So if a processor has
support for 32-bit and 64-bit IEEE-754 floats, most likely you'll be
able to define floating-point types that will result in one of those
two floating-point formats---but you won't be able to get a better-
precision float just by asking for a whole bunch of "digits".  (Maybe
there are Ada compilers that support higher-precision floats than the
processor supports.  I don't know.)

                                  -- Adam