
        On exit,  IFLAG  indicates  whether or not  the broadcast has
        been completed when PBCST is not NULL on entry. In that case,
        IFLAG is left unchanged.
</PRE>
<PRE>
PANEL   (local input/output)          HPL_T_panel *
        On entry,  PANEL  points to the data structure containing the
        panel (to be updated) information.
</PRE>
<PRE>
NN      (local input)                 const int
        On entry, NN specifies  the  local  number  of columns of the
        trailing  submatrix  