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In the 8086 microprocessor, shift instructions move bits in a binary number to the left or right, effectively multiplying or dividing the value by powers of two. For example, a left shift (SHL) doubles the number, while a right shift (SHR) halves it. In contrast, rotate instructions (RCL, RCR, ROL, ROR) also move bits but they wrap around the bits that are shifted out, placing them back into the opposite end of the number. This means that while shift operations affect the value of the number, rotate operations preserve the overall bit pattern.

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1mo ago

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