Intel 64 and IA-32 Architectures Software Developers Manual Volume 2B, Instruction Set Reference, N-Z

Vol. 2B B-29

INSTRUCTION FORMATS AND ENCODINGS

CALL – Call Procedure (in same segment)

direct 1110 1000 : displacement32

1111 1111 : 11 010 reg

memory indirect 0100 W0XB

1111 1111 : mod 010 r/m

CALL – Call Procedure (in other segment)

indirect 1111 1111 : mod 011 r/m

indirect 0100 10XB 0100 1000 1111 1111 : mod 011

r/m

CBW – Convert Byte to Word 1001 1000

CDQ – Convert Doubleword to Qword+ 1001 1001

CDQE – RAX, Sign-Extend of EAX 0100 1000 1001 1001

CLC – Clear Carry Flag 1111 1000

CLD – Clear Direction Flag 1111 1100

CLI – Clear Interrupt Flag 1111 1010

CLTS – Clear Task-Switched Flag in CR0 0000 1111 : 0000 0110

CMC – Complement Carry Flag 1111 0101

CMP – Compare Two Operands

register1 with register2 0100 0R0B 0011 100w : 11 reg1 reg2

qwordregister1 with qwordregister2 0100 1R0B 0011 1001 : 11 qwordreg1

qwordreg2

register2 with register1 0100 0R0B 0011 101w : 11 reg1 reg2

qwordregister2 with qwordregister1 0100 1R0B 0011 101w : 11 qwordreg1

qwordreg2

memory with register 0100 0RXB 0011 100w : mod reg r/m

memory64 with qwordregister 0100 1RXB 0011 1001 : mod qwordreg r/m

qwordregister with memory64 0100 1RXB 0011 101w1 : mod qwordreg r/m

immediate with register 0100 000B 1000 00sw : 11 111 reg : imm

immediate32 with qwordregister 0100 100B 1000 0001 : 11 111 qwordreg :

imm64

immediate with AL, AX, or EAX 0011 110w : imm

Table B-15. General Purpose Instruction Formats and Encodings

for 64-Bit Mode (Contd.)

Instruction and Format Encoding