It says that it is “implemented mostly in XS,” but I have not taken the time to see whether it uses microprocessor decimal-math

I don't think it does, but it certainly does decimal (as opposed to binary) arithmetic - and should be more than adequate for most people wanting to perform base 10 arithmetic.

OTOH, my Math::Decimal64 and Math::Decimal128 modules do make use of the _Decimal64 and _Decimal128 types, and associated operations: 
C:\>perl -MMath::Decimal64 -le "$x=Math::Decimal64->new(0); $x += Math
+::Decimal64->new('20.1') for (1..43);print $x;"
8643e-1

[download]
The user interface is a little awkward, mainly because gcc does not provide strtod64 or strtod128 functions, and does not provide any (s)printf formatters for the _Decimal64 and _Decimal128 type.

I'm working on improving that interface - and the current git version provides for output in floating point format instead of just scientific notation (ie as 864.3 instead of 8643e-1 for the quoted example).
I must also add overloading of strings - so that the above one liner can be rewritten as: 
perl -MMath::Decimal64 -le "$x=Math::Decimal64->new(0); $x += '20.1' f
+or (1..43);print $x;"

[download]
But I don't want to add overloading of NVs as that would defeat the purpose.

(That takes care of this month's quota of self-promotion ;-)

Cheers,
Rob

In reply to Re^2: floating point addition by syphilis
in thread floating point addition by kresike

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