3 Replies Latest reply on Aug 6, 2010 7:59 PM by LeeHowes

    Kernel Compile-time "adjustable" constant

    psath

      Hi guys, I'm working with memory coalescing in my kernel and I'm trying to write things generically as possible. I want to allocate a local array like "__local float coalesce[get_local_size(0)]" I know that this operation isn't permitted (variable length array), but the only time I need it to "vary" is right when I compile the kernel. Local sizes must be adjustable on a per-run basis in the host code, but will never change after their first initialization.

      Is there anyway of passing a variable down to the OpenCL compiler other than simply appending the rest of the source to a string like "#define localSize %d\n" +

      Thanks!

      -psath

       

      Oh now I feel silly... "-D name=definition" preprocessor option to clbuildprogram.