From: David.Kastrup@t-online.de (David Kastrup)
Cc: emacs-devel@gnu.org
Subject: Re: malloc and alignment
Date: 16 Jun 2003 17:15:54 +0200 [thread overview]
Message-ID: <x51xxuvys5.fsf@lola.goethe.zz> (raw)
In-Reply-To: <200306161438.h5GEcodM011551@rum.cs.yale.edu>
"Stefan Monnier" <monnier+gnu/emacs@rum.cs.yale.edu> writes:
> I'd like to try and get rid of the markbit on Lisp_Object values.
> The idea is to scrape off a few more bits (I'd like to bump maxint
> to 512MB instead of 128MB). And I'd also like to represent floats
> in 8bytes rather than 12.
If you are scraping off bits, why not instead _add_ one, but reserve
_all_ the additional tag values gained in that way for representing
integers?
Something like "tag byte values of 0 to 127 all represent integers,
tag byte values from 128 to 256 represent all other data types".
That way integers would go up to 1GB without pain.
--
David Kastrup, Kriemhildstr. 15, 44793 Bochum
next prev parent reply other threads:[~2003-06-16 15:15 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-06-16 14:38 malloc and alignment Stefan Monnier
2003-06-16 15:15 ` David Kastrup [this message]
2003-06-16 15:39 ` Stefan Monnier
2003-06-16 15:59 ` Stefan Monnier
2003-06-17 4:57 ` Stephen J. Turnbull
2003-06-17 7:35 ` David Kastrup
2003-06-16 22:35 ` Miles Bader
2003-06-16 23:11 ` Stefan Monnier
2003-06-17 2:25 ` Miles Bader
2003-06-17 4:48 ` Stephen J. Turnbull
[not found] ` <E19SJCe-0008Bb-Vp@fencepost.gnu.org>
2003-06-24 22:52 ` Stefan Monnier
[not found] ` <E19VGK5-0000CQ-F4@fencepost.gnu.org>
2003-06-27 23:17 ` Stefan Monnier
2003-06-27 23:47 ` Miles Bader
2003-06-29 2:30 ` Richard Stallman
2003-07-04 20:42 ` Stefan Monnier
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