o  Double-precision floating-point numbers are always rounded.

    o  The alternate form of .D_FLOATING is .DOUBLE.

    o  You can only use this directive within data or mixed psects
       (psects that have either the NOEXE or MIX attributes).

    o  If automatic data alignment is enabled, this directive aligns
       the current location counter to a quadword (64-bit) boundary
       before allocating storage.

    o  The Alpha architecture supports only conversion operations
       for the
       D floating-point data type.