[Date Prev][Date Next][Thread Prev][Thread Next]
[Date Index]
[Thread Index]
- Subject: Re: Integer subtype and NaN trick
- From: Coda Highland <chighland@...>
- Date: Sat, 15 Jun 2013 21:23:08 -0700
On Sat, Jun 15, 2013 at 6:11 PM, Miles Bader <miles@gnu.org> wrote:
> Roberto Ierusalimschy <roberto@inf.puc-rio.br> writes:
>> It will not use the NaN trick. (The trick does not work anyway in 64-bit
>> machines.)
>
> I think the NaN trick *could* work in 64-bit machines...
>
> http://lua-users.org/lists/lua-l/2011-07/msg00172.html
>
> -miles
The problem is that on modern OSes, you can't assume that you can fit
a 64-bit pointer in 48 bits. This is (part of) why LuaJIT demands to
use the low 2GB.
/s/ Adam
