/FLOAT=floattype D=platform-specific

                                  D=/FLOAT=D_FLOAT (OpenVMS VAX)
                                  D=/FLOAT=G_FLOAT (OpenVMS Alpha)
                                  D=/FLOAT=IEEE_FLOAT (OpenVMS I64)

 Selects the default format for REAL and DOUBLE data types.   You
 must  specify  'floattype' if you use the /FLOAT qualifier.  You
 can specify the following float types:

  o  D_FLOAT with corresponding [FLOAT(D_FLOAT)] attribute

  o  G_FLOAT with corresponding [FLOAT(G_FLOAT)] attribute

  o  IEEE_FLOAT with corresponding [FLOAT(IEEE_FLOAT)] attribute