longword-integer-multiplier
    OpenVMS usage:longword_signed
    type:         longword integer (signed)
    access:       read only
    mechanism:    by reference
    Multiplier used by LIB$EMUL in the extended-precision
    multiplication. The longword-integer-multiplier argument is the
    address of a signed longword integer containing the multiplier.
 longword-integer-multiplicand
    OpenVMS usage:longword_signed
    type:         longword integer (signed)
    access:       read only
    mechanism:    by reference
    Multiplicand used by LIB$EMUL in the extended-precision
    multiplication. The longword-integer-multiplicand argument is the
    address of a signed longword integer containing the multiplicand.
 addend
    OpenVMS usage:longword_signed
    type:         longword integer (signed)
    access:       read only
    mechanism:    by reference
    Addend used by LIB$EMUL in the extended-precision multiplication.
    The addend argument is the address of a signed longword integer
    containing the addend.
 product
    OpenVMS usage:quadword_signed
    type:         quadword integer (signed)
    access:       write only
    mechanism:    by reference
    Product of the extended-precision multiplication. The product
    argument is the address of a signed quadword integer into which
    LIB$EMUL writes the product.