// file: kernels.cu
// author: Leo Battalora (leo6@temple.edu)
//

// ----------------------------------------------------------------------------
// kernel: vec_add
//
__global__ void vec_add (float *a, float *b, int len) {

  // calculate vector index
  //
  int i = blockDim.x * blockIdx.x + threadIdx.x;

  // keep striding over grids until all indices for this thread have been 
  // calculated 
  //
  while (i < len) {

    // perform addition and save result in a[i]
    //
    a[i] = a[i] + b[i];
    i += gridDim.x * blockDim.x; // grid stride
  }
}

//
// end of file