Re: Compiling Elisp to a native code with a GCC plugin

[Lars Magne Ingebrigtsen <larsi@gnus.org>]

Andreas Schwab <schwab@linux-m68k.org> writes:

>>>> Don't the Lisp integers use a bit for the type tag?
>>>
>>> most-positive-fixnum is a variable defined in `data.c'.
>>> Its value is 2305843009213693951
>>
>> And by that you mean "yes" or "no"?
>>
>> (format "%x" most-positive-fixnum)
>> => "1fffffffffffffff"
>>
>> That's at least a few bits less than MAX_INT, isn't it?
>
> $ printf '#include <limits.h>\nINT_MAX\n' | gcc -E -xc - | tail -n1
> 2147483647

You're being rather gnomic.  That most-positive-fixnum is a 64-bit
number in your Emacs, but that you have an include file somewhere that
says that INT_MAX is a 32-bit number doesn't really make much sense.

On a 32-bit machine, this is what I get.

(format "%x" most-positive-fixnum)
=> "fffffff"

Instead of posting these snippets, it would make the discussion go much
quicker if you actually said what it is you were trying to convey by
posting these numbers without comment.

-- 
(domestic pets only, the antidote for overdose, milk.)
  larsi@gnus.org * Lars Magne Ingebrigtsen