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Simple OpenCL program in Mathematica

  • To: mathgroup at
  • Subject: [mg121317] Simple OpenCL program in Mathematica
  • From: Anna Ceguerra <anna.ceguerra at>
  • Date: Sat, 10 Sep 2011 07:28:40 -0400 (EDT)
  • Delivered-to:


This program that I'm trying in notebook doesn't work, but the documentation
doesn't say how to fix it (what is a valid argtype for string?):


src2 = "
  __kernel void hello(__global char * arry, mint len) {

    size_t index = get_global_id(0);

    if (index >= len) return;

    arry[index] = index + '0';


helloWorld = OpenCLFunctionLoad[src2, "hello", {{_Character}, _Integer},

helloWorld["0000000000", 10]

Error message:
OpenCLFunctionLoad::invtypspec: "{_Character} is not a valid argument type."

I would like to be able to set the ASCII characters in the char * array in
OpenCL, and print the result to the notebook in Mathematica. I tried several
things, including changing _Character to _String, and changing all strings
to integer array.

What do I need to be able to get this to work? If you need further details
on what I'm trying to do, please let me know.

Thanks and regards,

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