On May 17, 2011, at 14:59, Mark H Weaver wrote:
>> But the question I was after was, even if we want to use the full
>> range of the values, do we need the entire set to be representable *in
>> immediate form*? I doubt the very largest and smallest values are
>> used often, so making just those va
Ken Raeburn writes:
> On May 15, 2011, at 11:47, Andy Wingo wrote:
>> No, but the nice thing about doubles is that it's a closed set. Any
>> operation on a double produces a double. Subsets do not have that
>> property.
>
> Well, I think it's also a subset of "long double", but if you define
> t
Hi Ken,
On Sun 15 May 2011 22:43, Ken Raeburn writes:
>> FWIW I plan on moving objcode to be ELF in 2.2, which will mean we
> write
>> our own loader for ELF, so we would have similar concerns about
> mapping
>> the file in the right address range.
>
> Ooh, also very interesting. Though, I woul
On May 15, 2011, at 11:47, Andy Wingo wrote:
> However... note that GCC obsoleted all vax ports but openbsd and netbsd
> in 4.3, removed them in 4.4, and just obsoleted it on netbsd recently I
> think. Just saying :)
I knew a bunch of ancient OSes for Vax were made obsolete in gcc, but last I
lo
On Sun 15 May 2011 11:00, Ken Raeburn writes:
> So... Guile 2.2 won't work on the VAXstation in my basement, which
> doesn't do IEEE math? :-(
> (Not that I've powered it up in some time...)
I have no idea.
However... note that GCC obsoleted all vax ports but openbsd and netbsd
in 4.3, removed
On Sun 15 May 2011 11:02, Ken Raeburn writes:
> Is that really any more of an issue this way than with the current
> encoding -- if not for SCM, then for heap data structures including both
> SCM objects and integers or characters? I thought the GC code already
> had to cope with things looking
On May 14, 2011, at 05:47, Andy Wingo wrote:
> However, I realized that this isn't going to work on 32-bit, and for an
> unexpected reason: GC. The problem is that the low 32-bits can be
> interpreted as a pointer, so you need to tag those bits to make the
> payloads of immediate values like integ
On May 12, 2011, at 06:17, Andy Wingo wrote:
> I'm looking at new SCM representation and tagging possibilities in 2.2.
> Read the whole mail please, as it's a little complicated.
Iteresting
> I would like to revisit the SCM representation and tagging scheme in
> 2.2. In particular, I wou
Hi Mark,
On Sat 14 May 2011 00:08, Mark H Weaver writes:
> Andy Wingo writes:
>> I'm looking at new SCM representation and tagging possibilities in 2.2.
>> Read the whole mail please, as it's a little complicated.
>
> Unfortunately I don't have time to write a proper response right now,
> but o
Hi Andy,
Andy Wingo writes:
> I'm looking at new SCM representation and tagging possibilities in 2.2.
> Read the whole mail please, as it's a little complicated.
Unfortunately I don't have time to write a proper response right now,
but on 32-bit architectures, I expect that this will nearly doub
Looks interesting.
I would like to reserve an object for the stack machine I use. Actually I
will be fine to model the prolog
engine ontop of your segestion if it was not for one idea.
So you have a layout of this
(X Tag14 Data Tag8)
Consider a the following tag in Tag14, frame-tag. Then Data is
So we'll see a 48-bits solution in 2.2?
Sorry I can't say I'm clear since it's a long article.
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Hello list,
I'm looking at new SCM representation and tagging possibilities in 2.2.
Read the whole mail please, as it's a little complicated.
The current system has a couple of problems:
1) You can only tell a pair by dereferencing the pointer and checking
the cell's low bits, and then we
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