tails).

    @param[in]
    ldda     INTEGER
            The leading dimension of the array dA.  LDDA >= max(1,M).
            To benefit from coalescent memory accesses LDDA must be
            divisible by 16.

    @param[out]
    tau     COMPLEX_16 array, dimension (min(M,N))
            The scalar factors of the elementary reflectors (see Further
            Details).

    @param[out]
    dT      (workspace) COMPLEX_16 array on the GPU,
            dimension (2*MIN(M, N) + ceil(N/32)*32 )*NB,
          