copy-test.hpp

copy-test.hpp

  mat src(4, 1);
  src.randn();
  mat dst(4, 1);
  dst.randu();

  src.print();
  dst.print();

  // Copy the first three elements from src to dst.
  cudaMemcpy((double*)dst.get_dev_mem().cuda_mem_ptr, src.get_dev_mem().cuda_mem_ptr, sizeof(double) * 3, cudaMemcpyDeviceToDevice);
  // Copy first element from src to last element in dst.
  cudaMemcpy((double*)dst.get_dev_mem().cuda_mem_ptr + 3, src.get_dev_mem().cuda_mem_ptr, sizeof(double) * 1, cudaMemcpyDeviceToDevice);

  src.print();
  dst.print();

that is right