(Alpha and i64 only.) The Extended Multiply and Integerize
    routine (IEEE T-Floating-Point Values) allows higher-level
    language users to perform accurate range reduction of IEEE T-
    floating arguments.

    Format

      LIB$EMODT  floating-point-multiplier ,multiplier-extension

                 ,floating-point-multiplicand ,integer-portion

                 ,fractional-portion