*>
*> \param[in] RES
*> \verbatim
-*> RES is DOUBLE PRECISION array, dimension (N,NRHS)
+*> RES is REAL array, dimension (N,NRHS)
*> The residual matrix, i.e., the matrix R in the relative backward
*> error formula above.
*> \endverbatim
*>
*> \param[in] AYB
*> \verbatim
-*> AYB is DOUBLE PRECISION array, dimension (N, NRHS)
+*> AYB is REAL array, dimension (N, NRHS)
*> The denominator in the relative backward error formula above, i.e.,
*> the matrix abs(op(A_s))*abs(Y) + abs(B_s). The matrices A, Y, and B
*> are from iterative refinement (see cla_gerfsx_extended.f).