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Groups > comp.soft-sys.math.mathematica > #3430

Re: C code generation

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On 6/29/2011 2:34 PM, Shane Di Dona wrote:
> Is there a way to make Mathematica generate C code for functions such as Position[] and MemberQ[]?

  I am writing a program for CUDAlink and would like not to have to 
reinvent the wheel (in C)

on these somewhat basic functions.
>

1. Code for a similar program for position and member can be found in 
other languages, though really, it should be easy to write yourself.
2. A full implementation of Position and MemberQ requires that you allow 
for the possibility of searching for a pattern, and so you would have to 
(re) implement Mathematica's matching.  I doubt you want to do that.
3. While I am not familiar with CUDAlink, it seems to me unlikely that 
copying a (long?) list into a graphics processor to test for membership 
is a really bad idea. A worse idea would be, I suppose, NOT copying the 
list into the graphics processor.  My suggestion: Read up on hash 
tables. Suggestion 2: If you are in a hurry, don't use Mathematica.

RJF

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C code generation Shane Di Dona <stdidona@ncsu.edu> - 2011-06-29 21:34 +0000
  Re: C code generation Richard Fateman <fateman@cs.berkeley.edu> - 2011-07-01 00:45 +0000

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