From: Ville-Pertti Keinonen <will@exomi.com>
To: Lauri Alanko <la@iki.fi>
Cc: caml-list@inria.fr
Subject: Re: [Caml-list] Bug? Printf, %X and negative numbers
Date: Thu, 3 Apr 2003 20:40:19 +0300 [thread overview]
Message-ID: <568EB1B4-65FB-11D7-BBC9-000393863F70@exomi.com> (raw)
In-Reply-To: <20030402214655.GA10752@la.iki.fi>
> For occasional hotspots where naked integers are essential for
> performance, wouldn't the easiest solution be to use the equivalent of
> GHC's unboxed ints: a special _non-polymorphic_ datatype that doesn't
> have tags. This type would be given a kind different from other types
> to
> prevent it from being used as a type parameter. Of course the GC still
> needs to be prevented from following such values, but a separate stack
> for them ought to do the trick.
Untagged non-pointers on the stack are already identified by frame
descriptors.
Something like that but less restrictive could probably be implemented
as optimized calling conventions for int32/int64 when explicitly
specified.
Native-sized integers are currently handled unboxed locally inside
functions, they just require boxing when stored in a block, passed as
parameters or returned. Using them is pretty inconvenient, though.
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next prev parent reply other threads:[~2003-04-03 17:40 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-04-02 18:42 Gregory Morrisett
2003-04-02 21:12 ` Ville-Pertti Keinonen
2003-04-02 21:46 ` Lauri Alanko
2003-04-03 17:40 ` Ville-Pertti Keinonen [this message]
2003-04-04 16:14 ` Brian Hurt
2003-04-04 17:14 ` Ville-Pertti Keinonen
2003-04-04 17:27 ` Falk Hueffner
2003-04-03 0:52 ` brogoff
-- strict thread matches above, loose matches on Subject: below --
2003-04-03 9:29 Fabrice Le Fessant
2003-03-28 21:19 Brian Hurt
2003-03-28 22:21 ` Yutaka OIWA
2003-03-30 9:51 ` Xavier Leroy
2003-03-31 15:44 ` Brian Hurt
2003-03-31 17:13 ` Ville-Pertti Keinonen
2003-04-01 8:19 ` Xavier Leroy
2003-04-01 16:09 ` David Brown
2003-04-01 16:45 ` Tim Freeman
2003-04-01 18:59 ` Brian Hurt
2003-04-01 19:16 ` Ville-Pertti Keinonen
2003-04-01 19:23 ` Tim Freeman
2003-04-01 21:00 ` Ville-Pertti Keinonen
2003-04-01 19:56 ` Brian Hurt
2003-04-01 20:45 ` Ville-Pertti Keinonen
2003-04-01 21:03 ` Brian Hurt
2003-04-02 8:55 ` Andreas Rossberg
2003-04-02 9:20 ` Ville-Pertti Keinonen
2003-04-01 18:34 ` Ville-Pertti Keinonen
2003-04-02 11:44 ` Claude Marche
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