𝗖𝗵𝗮𝗽𝘁𝗲𝗿 𝟰: Data Movement Instructions

Question 1

Data movement instructions

Answer 1

MOV, MOVSX, MOVZX, PUSH, POP, BSWAP, XCHG, XLAT, IN, OUT, LEA, LDS LES, LFS, LGS, LSS, LAHF, SAHF

Question 2

String Instructions

Answer 2

MOVS, LODS, STOS, INS, OUTS

Question 3

CMOV

Answer 3

Condition Move Instruction

Question 4

Are presented first because they are more commonly used in programs and are easy to understand

Answer 4

Data Movement Instructions

Question 5

Latest data transfer instruction implemented on the Pentium Pro and above

Answer 5

CMOV

Question 6

Native binary code that the microprocessor understand and uses as its instructions to control its operation.

Answer 6

Machine Language

Question 7

Is introduced because it may occasionally be necessary to interpret machine language programs generated by an assembler or inline assembler of Visual C++

Answer 7

Machine Code

Question 8

Machine language instructions for the 8086 through Core 2 vary in length from

Answer 8

1 to as many as 13 bytes

Question 9

66H

Answer 9

Register-size prefix

Question 10

67H

Answer 10

Address size-prefix

Question 11

Appended to the front of the instructions

Answer 11

Register-size prefix

Question 12

Is used in a similar fashion

Answer 12

Address size-prefix (67H)

Question 13

Should be selected to function with the current application

Answer 13

Mode of Operation (16 or 32 bit)

Question 14

Selects the operation that is performed by the microprocessor

Answer 14

Opcode

Question 15

Is either 1 or 2 bytes long for most machine language instructions

Answer 15

Opcode

Question 16

The first 6 bits of the first byte are the

Answer 16

Binary opcode

Question 17

The two remaining bits in the first 6 bits of the first byte is called

Answer 17

Direction (D)

Question 18

D =1

Answer 18

To the register (REG) field from the R/M field

Question 19

D=0

Answer 19

To the R/M field from REG field

Question 20

Specifies the addressing mode for the selected instruction

Answer 20

MOD Field

Question 21

Are important instructions that store and retrieve data from LIFO stack memory

Answer 21

PUSH and POP

Question 22

Six forms of the PUSH and POP instructions

Answer 22

Register, memory, immediate, segment register, flags and all registers

Question 23

Allows the contents of any 16-bit register to be transferred to or from the stack

Answer 23

Register addressing

Question 24

Allows immediate data to be pushed onto the stack, but not popped off the stack.

Answer 24

Immediate Addressing

Question 25

Allows the contents of any segment register to be pushed onto the stack ot removed from the stack

Answer 25

Segment register addressing

Question 26

Always transfer 2 bytes of data to the stack; the 80386 and ab9ve transfer 2 or 4 bytes, depending on the register or size of the memory location

Answer 26

PUSH instruction

Question 27

Copies the contents of the internal register set, except the segment register, to the stack

Answer 27

PUSHA

Question 28

PUSHA instruction copies the registers to the stack in following order:

Answer 28

AX, CX, DX, BX, SP, BP, SI and DI

Question 29

Copies the contents of the flag register to the stack

Answer 29

PUSHF

Question 30

Push and pop the contents of the 32-bit register set found in the 80386 through Pentium 4.

Answer 30

PUSHAD and POPAD

Question 31

Performs the inverse operation of a PUSH instructions

Answer 31

POP instruction

Question 32

Removes data from the stackcand places it into the target 16-register, segment register or a 16-bit memory location

Answer 32

POP instruction

Question 33

POPA instruction removrs 16 bytes of data from the stack a d places them into the following register

Answer 33

DI, SI, BP, SP, BX DX, CX, and AX

Question 34

Removes 16-bit number from the stack and places it into the flag register

Answer 34

POPF

Question 35

Removes a 32-bit number from the stack and places it into the extended flag register

Answer 35

POPFD

Question 36

Reloads the 32-bit register from the stack

Answer 36

POPAD