• Don Clugston <Don_member pathlink.com> Jul 27 2005
• "Ben Hinkle" <ben.hinkle gmail.com> Jul 28 2005
• Don Clugston <Don_member pathlink.com> Jul 28 2005
• "Ben Hinkle" <ben.hinkle gmail.com> Jul 28 2005
• Sean Kelly <sean f4.ca> Jul 28 2005
• Manfred Nowak <svv1999 hotmail.com> Jul 31 2005

Don Clugston <Don_member pathlink.com> writes:

Hello -
I'm just starting to explore D. I have a particular interest in floating point
calculations, which D seems to have superb language support for.
But I have not been able to find any libraries which take advantage of this
support. (In fact even C99 libraries seem to be rare on the web).
Am I correct in believing that this incredible potential is almost completely
untapped at present? What is out there so far?

Cheers,
Don.

"Ben Hinkle" <ben.hinkle gmail.com> writes:

"Don Clugston" <Don_member pathlink.com> wrote in message 
news:dc9g60$13ae$1 digitaldaemon.com...
 Hello -
 I'm just starting to explore D. I have a particular interest in floating 
 point
 calculations, which D seems to have superb language support for.
 But I have not been able to find any libraries which take advantage of 
 this
 support. (In fact even C99 libraries seem to be rare on the web).
 Am I correct in believing that this incredible potential is almost 
 completely
 untapped at present? What is out there so far?

 Cheers,
 Don.


What sort of functionality are you looking for? Something like LAPACK or 
Blitz?
There's a proposal for better multi-dimensional array support by Norbert 
Nemec (see for example 
http://www.digitalmars.com/d/archives/digitalmars/D/3223.html) but I'm not 
aware of any D-specific libraries. A (not-so-complete) list of libraries is 
at http://www.prowiki.org/wiki4d/wiki.cgi?AllLibraries 

Don Clugston <Don_member pathlink.com> writes:

In article <dcai9k$1se8$1 digitaldaemon.com>, Ben Hinkle says...
"Don Clugston" <Don_member pathlink.com> wrote in message 
news:dc9g60$13ae$1 digitaldaemon.com...
 Hello -
 I'm just starting to explore D. I have a particular interest in floating 
 point
 calculations, which D seems to have superb language support for.
 But I have not been able to find any libraries which take advantage of 
 this
 support. (In fact even C99 libraries seem to be rare on the web).
 Am I correct in believing that this incredible potential is almost 
 completely
 untapped at present? What is out there so far?

 Cheers,
 Don.


What sort of functionality are you looking for? Something like LAPACK or 
Blitz?


Anything, really. It seems that Phobos doesn't even have the most trivial
functions for complex numbers -- eg. exp(creal x).
The combination of built-in support for 80-bit imaginary numbers, NCEG
operators, unit tests, and the template features could easily make D the most
robust (and fast) language for computation. I'm a research scientist/engineer,
with a significant experience of x86 FP assembler and modern C++, so I believe I
could make a contribution in this area. I just want to make sure that I wouldn't
be reinventing the wheel.

There's a proposal for better multi-dimensional array support by Norbert 
Nemec (see for example 
http://www.digitalmars.com/d/archives/digitalmars/D/3223.html)


That is truly awesome! It does caution me against doing much matrix work, though
-- that proposal would render a lot of code obselete.

but I'm not 
aware of any D-specific libraries. A (not-so-complete) list of libraries is 
at http://www.prowiki.org/wiki4d/wiki.cgi?AllLibraries


It looks very easy to find something that hasn't already been done :)
Maybe I can write std.complex.d

"Ben Hinkle" <ben.hinkle gmail.com> writes:

[snip]
 It seems that Phobos doesn't even have the most trivial
 functions for complex numbers -- eg. exp(creal x).
 The combination of built-in support for 80-bit imaginary numbers, NCEG
 operators, unit tests, and the template features could easily make D the 
 most
 robust (and fast) language for computation. I'm a research 
 scientist/engineer,
 with a significant experience of x86 FP assembler and modern C++, so I 
 believe I
 could make a contribution in this area. I just want to make sure that I 
 wouldn't
 be reinventing the wheel.


Welcome - it's great to have people interested in numerics. Things are 
pretty quiet right now over the summer but we have gotten some good threads 
on number-crunching in the past.

There's a proposal for better multi-dimensional array support by Norbert
Nemec (see for example
http://www.digitalmars.com/d/archives/digitalmars/D/3223.html)


 That is truly awesome! It does caution me against doing much matrix work, 
 though
 -- that proposal would render a lot of code obselete.


True - I think there have been several vector/matrix modules coded up (2 and 
3 dim mostly). I don't have any links handy, though.

 but I'm not
aware of any D-specific libraries. A (not-so-complete) list of libraries 
is
at http://www.prowiki.org/wiki4d/wiki.cgi?AllLibraries


 It looks very easy to find something that hasn't already been done :)
 Maybe I can write std.complex.d


Go for it. I'm sure it will be appreciated. It is pretty common to request 
at dsource if you need a host and forum. The url is http://www.dsource.org - 
ask for Brad :-)
Or if you are planning something somewhat small like a single module for std 
(as you suggest) then the typical approach is to post some ideas or post 
some code and have people comment and then send it to Walter. You can also 
just email Walter to get his opinion on the whole thing but be aware he's 
out right now. 

Sean Kelly <sean f4.ca> writes:

In article <dcbsvs$8em$1 digitaldaemon.com>, Don Clugston says...
In article <dcai9k$1se8$1 digitaldaemon.com>, Ben Hinkle says...
What sort of functionality are you looking for? Something like LAPACK or 
Blitz?


Anything, really. It seems that Phobos doesn't even have the most trivial
functions for complex numbers -- eg. exp(creal x).


For what it's worth, I've exposed all the standard C routines that DMD supports
(that being all of them) for complex mathematics.  Links are here:

http://svn.dsource.org/projects/ares/trunk/src/ares/std/c/complex.d
http://svn.dsource.org/projects/ares/trunk/src/ares/std/c/math.d

The combination of built-in support for 80-bit imaginary numbers, NCEG
operators, unit tests, and the template features could easily make D the most
robust (and fast) language for computation. I'm a research scientist/engineer,
with a significant experience of x86 FP assembler and modern C++, so I believe I
could make a contribution in this area. I just want to make sure that I wouldn't
be reinventing the wheel.


Definately not.  And it would be great to have a solid numeric library for D.


Sean

Manfred Nowak <svv1999 hotmail.com> writes:

Don Clugston <Don_member pathlink.com> wrote:

 It looks very easy to find something that hasn't already been
 done :) Maybe I can write std.complex.d


An it is as easy to overlook, that there are already processor 
specific libraries available.

For the Athlon 64 AMD has released "AMD Core Math Library (ACML)" 
with versions of BLAS, LAPACK etc. and a C interface to them.
Therefore al that has to be done is to convert the headerfile to D.

-manfred