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

B-24 Vol. 2B

INSTRUCTION FORMATS AND ENCODINGS

B.2.1 General Purpose Instruction Formats and Encodings for

64-Bit Mode

Table B-15 shows machine instruction formats and encodings for general purpose

instructions in 64-bit mode.

Table B-14. Special Symbols

Symbol Application

S If the value of REX.W. is 1, it overrides the presence of 66H.

w The value of bit W. in REX is has no effect.

Table B-15. General Purpose Instruction Formats and Encodings

for 64-Bit Mode

Instruction and Format Encoding

ADC – ADD with Carry

register1 to register2 0100 0R0B : 0001 000w : 11 reg1 reg2

qwordregister1 to qwordregister2 0100 1R0B : 0001 0001 : 11 qwordreg1

qwordreg2

register2 to register1 0100 0R0B : 0001 001w : 11 reg1 reg2

qwordregister1 to qwordregister2 0100 1R0B : 0001 0011 : 11 qwordreg1

qwordreg2

memory to register 0100 0RXB : 0001 001w : mod reg r/m

memory to qwordregister 0100 1RXB : 0001 0011 : mod qwordreg r/m

qwordregister to memory 0100 1RXB : 0001 0001 : mod qwordreg r/m

immediate to register 0100 000B : 1000 00sw : 11 010 reg :

immediate

immediate to qwordregister 0100 100B : 1000 0001 : 11 010 qwordreg :

imm32

immediate to qwordregister 0100 1R0B : 1000 0011 : 11 010 qwordreg :

imm8

immediate to AL, AX, or EAX 0001 010w : immediate data

immediate to RAX 0100 1000 : 0000 0101 : imm32

immediate to memory 0100 00XB : 1000 00sw : mod 010 r/m :

immediate

immediate32 to memory64 0100 10XB : 1000 0001 : mod 010 r/m :

imm32