You could try to go down the interesting route of compiling a Perl with an IV size of 128 bit, but that'll likely make the XS libraries crash and burn as they likely suppose that sizeof(void *) == sizeof(int) == sizeof(IV). But it might be worth a try to just see whether Perl compiles and tests OK with an enlarged IV.

In reply to Re^3: Module for 128-bit integer math? by Corion
in thread Module for 128-bit integer math? by BrowserUk

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