Using OpenCL Kernels

The SDAccel™ environment supports the OpenCL™ language constructs and built in functions from the OpenCL 1.0 embedded profile. The following is an example of an OpenCL kernel for matrix multiplication that can be compiled with the SDAccel environment.

__kernel __attribute__ ((reqd_work_group_size(16,16,1))) 
void mult(__global int* a, __global int* b, __global int* output)
{
  int r = get_local_id(0);
  int c = get_local_id(1);
  int rank = get_local_size(0);
  int running = 0;
  for(int index = 0; index < 16; index++){
    int aIndex = r*rank + index;
    int bIndex = index*rank + c;
    running += a[aIndex] * b[bIndex];
  }
  output[r*rank + c] = running;
  return;

}