.D_FLOATING evaluates the specified floating-point constants and
    stores the results in the object module. .D_FLOATING generates
    64-bit, double-precision floating-point data (1 bit of sign, 8
    bits of exponent, and 55 bits of fraction). See the description
    of .F_FLOATING for information on storing single-precision
    floating-point numbers and the descriptions of .G_FLOATING, .S_
    FLOATING, and .T_FLOATING for descriptions of other floating-
    point constants.