B-12
INSTRUCTION FORMATS AND ENCODINGS
MOV Move to/from Debug Registers
DR0-DR3 from register
0000 1111 : 0010 0011 : 11 eee reg
DR4-DR5 from register
0000 1111 : 0010 0011 : 11 eee reg
DR6-DR7 from register
0000 1111 : 0010 0011 : 11 eee reg
register from DR6-DR7
0000 1111 : 0010 0001 : 11 eee reg
register from DR4-DR5
0000 1111 : 0010 0001 : 11 eee reg
register from DR0-DR3
0000 1111 : 0010 0001 : 11 eee reg
MOV Move to/from Segment Registers
register to segment register
1000 1110 : 11 sreg3 reg
register to SS
1000 1110 : 11 sreg3 reg
memory to segment reg
1000 1110 : mod sreg3 r/m
memory to SS
1000 1110 : mod sreg3 r/m
segment register to register
1000 1100 : 11 sreg3 reg
segment register to memory
1000 1100 : mod sreg3 r/m
MOVS/MOVSB/MOVSW/MOVSD Move Data
from String to String
1010 010w
MOVSX Move with Sign-Extend
register2 to register1
0000 1111 : 1011 111w : 11 reg1 reg2
memory to reg
0000 1111 : 1011 111w : mod reg r/m
MOVZX Move with Zero-Extend
register2 to register1
0000 1111 : 1011 011w : 11 reg1 reg2
memory to register
0000 1111 : 1011 011w : mod reg r/m
MUL Unsigned Multiply
AL, AX, or EAX with register
1111 011w : 11 100 reg
AL, AX, or EAX with memory
1111 011w : mod 100 reg
NEG Two's Complement Negation
register
1111 011w : 11 011 reg
memory
1111 011w : mod 011 r/m
NOP No Operation
1001 0000
NOT One's Complement Negation
register
1111 011w : 11 010 reg
memory
1111 011w : mod 010 r/m
Table B-10. Integer Instruction Formats and Encodings (Contd.)
Instruction and Format
Encoding
