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arithmetic shift

A shift, applied to the representation of a number in a fixed radix numeration system and in a fixedpoint representation system, and in which only the characters representing the fixedpoint part of the number are moved. An arithmetic shift is usually equivalent to multiplying the number by a positive or a negative integral power of the radix, except for the effect of any rounding; compare the logical shift with the arithmetic shift, especially in the case of floatingpoint representation. 

