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- Subject: Re: Integer subtype and NaN trick
- From: Miles Bader <miles@...>
- Date: Sun, 16 Jun 2013 14:35:34 +0900
Coda Highland <firstname.lastname@example.org> writes:
> The problem is that on modern OSes, you can't assume that you can
> fit a 64-bit pointer in 48 bits.
My impression was that current implementations of the x86-64
architecture only use 48 bits of addresses, requiring the upper 16
bits to be identical. Has this changed with very recent
> This is (part of) why LuaJIT demands to use the low 2GB.
Yeah the 2GB limitation is a huge lose... but that's obviously a lot
more restrictive than necessary...
Insurrection, n. An unsuccessful revolution.