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extern "C" __global__ void sequence_gpu(int *d_ptr, int length) {
  int elemID = blockIdx.x * blockDim.x + threadIdx.x;

  if (elemID < length) {
    unsigned int laneid;

    // This command gets the lane ID within the current warp
    asm("mov.u32 %0, %%laneid;" : "=r"(laneid));

    d_ptr[elemID] = laneid;
  }
}