 instead
          of the matrices B and R, as follows:
          = 'B':  B and R are given;
          = 'G':  G is given.

  FACT    CHARACTER*1
          Specifies whether or not the matrices Q and/or R (if
          JOBB = 'B') are factored, as follows:
          = 'N':  Not factored, Q and R are given;
          = 'C':  C is given, and Q = C'C;
          = 'D':  D is given, and R = D'D;
          = 'B':  Both factors C and D are given, Q = C'C, R = D'D.

  UPLO    CHARACTER*1
          If JOBB = 'G', or