2 Replies Latest reply on Dec 2, 2014 6:52 AM by domjoh

    Relational built-in function 'select' causes "Segmentation fault"




      I'm trying to use the select built-in function in the following kernel :


      __kernel void Kernel1(__global uchar4 *a,

                         __global uchar4 *b,

                         __global uchar4 *c,

                         __global uchar *seuil)


          int g_x = get_global_id(0);

          int g_y = get_global_id(1);

          int index = g_y*256 + g_x;

          c[index] = select((uchar4)0, (uchar4)1, (a[index] - b[index] > *seuil));



      but it crashes my application down when running on my AMD GPUs with a meaning less error message (at least for me) when it works just fine on Intel CPU and Nvidia GPUs.

      When I try to analyse the kernel code within CodeXL, it crashes at the first compilation attempt, exiting CodeXL with a "Segmentation fault" error.


      Does any one have any idea of what the problem could be ?


      Thank you.