( Q1 ).

  LDQ1    INTEGER
          The leading dimension of the array Q1.  LDQ1 &gt;= MAX(1,N).

  Q2      (input) COMPLEX*16 array, dimension (LDQ2,N)
          On entry, the leading N-by-N part of this array must
          contain the matrix op( Q2 ).

  LDQ2    INTEGER
          The leading dimension of the array Q2.  LDQ2 &gt;= MAX(1,N).

</PRE>
<B>Workspace</B>
<PRE>
  RES     DOUBLE PRECISION array, dimension (LDRES,N)

  LDRES   INTEGER
          The leading dimension of the array RES.
          LD