CCTK_CUDA_KERNEL initial_gaussian TYPE=gpu_cuda/3dblock TILE="8,8,8" SHARECODE=yes STENCIL="0,0,0,0,0,0"
{
  CCTK_CUDA_KERNEL_VARIABLE  cached=no intent=out {phi} "phi"
  CCTK_CUDA_KERNEL_VARIABLE  cached=no intent=in {x} "x"
}