VMS Help RTL Routines, MTH$, MTH$CVT x x, Argument  *Conan The Librarian (sorry for the slow response - running on an old VAX)

 floating-point-input-val

    OpenVMS usage:floating_point
    type:         D_floating, G_floating
    access:       read only
    mechanism:    by reference

    The input value to be converted. The floating-point-input-val
    argument is the address of this input value. For MTH$CVT_D_G, the
    floating-point-input-val argument specifies a D-floating number.
    For MTH$CVT_G_D, the floating-point-input-val argument specifies
    a G-floating number.