VMS Help TCPIP Services, Programming Interfaces, RPC XDR Routines, xdr_float, Description  *Conan The Librarian (sorry for the slow response - running on an old VAX)

    A filter primitive that translates between single-precision
    floating-point numbers and their external representations.

    This routine is actually implemented by two XDR routines:
    xdr_       converts VAX F-format floating-point numbers
    float_F
    xdr_       converts IEEE T-format floating-point numbers
    float_S

    You can reference these routines explicitly or you can use
    compiler settings to control which routine is used when you
    reference the xdr_float routine.