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Explain about the Arithmetic Shift
An arithmetic shift micro operation shifts the signed binary number to left or right.
The effect of the arithmetic shift left operation is to multiply binary number by 2.
Similarly an arithmetic shift right divides number by 2. Since the sign of number must remain same arithmetic shift-right must leave sign bit unchanged, when it is multiplied or divided by 2. The left most bit in a register hold sign bit, and remaining bits hold number. The sign bit is 0 for positive and 1for the negative. Negative numbers exists in 2's complement form. Following figure represents a typical register of n bits.
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