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Computing (FOLDOC) dictionary
logical shift
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programming (Either shift left logical or shift right
logical) Machine-level operations available on nearly all
processors which move each bit in a word one or more bit
positions in the given direction. A left shift moves the bits
to more significant positions (like multiplying by two), a
right shift moves them to less significant positions (like
dividing by two). The comparison with multiplication and
division breaks down in certain circumstances - a logical
shift may discard bits that are shifted off either end of the
word and does not preserve the sign of the word (positive or