CORLANG Week6-7

Shift Instructions can be classified as either Logical Shift or Arithmetic Rotate.

• TRUE
• FALSE

Shift instructions can not be classified by the direction of the shift (i.e., shift to the left or shift to the right).

• TRUE
• FALSE

Thus there are four types of shift instructions: shift logical left (SHL), shift logical right (SHR), shift arithmetic left (SAL), and ?

• shift arithmetic right (SAR)
• shift arithmetic left (SAL)
• shift arithmetic right (SHR)
• shift asymmetric right (SAR).

SHL (Shift Logical Left) and SAL (Shift Arithmetic Left) are the same mnemonics but does not perform the same operation. Both instructions shift to the left the destination operand by the number of bits specified in the count operand.

• TRUE
• FALSE

The SHR (Shift Logical Right) instruction shifts to the right the destination operand by the number of bits specified in the count operand. Which of the following is TRUE?

• As the bits are being shifted, zeros are shifted in on the left.
• As the bits are being shifted, zeros are shifted in on the right.
• As the bytes are being shifted, zeros are shifted in on the left.
• As the bytes are being shifted, zeros are shifted in on the right.

The SAR (Shift Arithmetic Right) instruction shifts to the right the destination operand by the number of bits specified in the count operand. Which of the following is TRUE?

• As the bits are being shifted, the most significant bit is shifted in to the left, preserving the sign bit.
• As the bits are being shifted, the most significant bit is shifted in to the right, preserving the sign bit.
• As the bits are being shifted, the most significant bit is shifted in to the left, preserving the carry bit.
• As the bits are being shifted, the most significant bit is shifted in to the left, preserving the parity bit.

Rotate Instructions rotate bits out into the other end of the operand can be classified by the direction of the rotation (rotate to the left or shift to the right)

• TRUE
• FALSE

The different types of rotate instructions are?
ROL, ROR, RCL and RCR instruction

• ROL, ROR, RCL and RCR instruction
• ROL, ROR, RCF and RCF instruction
• RTL, RTR, RCL and RCR instruction
• RTL, RTR, RCF and RCF instruction

The ROL (Rotate Left) instruction rotates to the left the destination operand by the number of bits specified in the data operand.

• TRUE
• FALSE

The ROL (Rotate Left) instruction rotates to the right the destination operand by the number of bits specified in the count operand.

• TRUE
• FALSE