code: public static int cusolverDnSsygvd_bufferSize(
          cusolverDnHandle handle, 
          int itype, 
          int jobz, 
          int uplo, 
          int n, 
          Pointer A, 
          int lda, 
          Pointer B, 
          int ldb, 
          Pointer W, 
          int[] lwork)
      {
          return checkResult(cusolverDnSsygvd_bufferSizeNative(handle, itype, jobz, uplo, n, A, lda, B, ldb, W, lwork));
      }
docs: generalized symmetric eigenvalue solver, A*x = lambda*B*x, by divide-and-conquer