(if UPLO = 'U') or stricly upper triangular part (if
          UPLO = 'L') is not referenced.
          If FACT = 'D' or 'B', the leading P-by-M part of this
          array must contain the direct transmission matrix D of the
          system.
          If JOBB = 'B' and SCAL = 'G', then R is modified
          internally, but is restored on exit.
          If JOBB = 'G', this array is not referenced.

  LDR     INTEGER
          The leading dimension of array R.
          LDR &gt;= MAX(1,M) if JOBB = 'B' 