I tried two extended double versions of given loop: __float80 (hardware) and __float128 (software emulation). The results were, respectively: 

1141973130132393144424071168.000000
1141973130132392916052606976.000000
Difference in speed -- about 60-fold.

ps. would you mind stating the mathematically correct result (say, to six digits after decimal point)?

In reply to Re^2: Decimal Floating Point (DFP) and does Perl needs DFP? by Anonymous Monk
in thread Decimal Floating Point (DFP) and does Perl needs DFP? by flexvault

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