http://www.perlmonks.org?node_id=766045


in reply to Re^2: portably finding max integer
in thread portably finding max integer

Yes, Perl guarantees that IV will be at least 32 bits. And you will have better luck building your Perl so that NVs have more mantissa bits than IVs (if you have 64-bit IV, then use 'long double' for NV) as making allowances for IV being better for some values and NV being better for other values is quite complicated (doomed to fail in some cases, I say) and has also only been introduced to Perl fairly recently.

- tye