x86data

AAA 37 (Invalid in 64-bit mode.) 
eflags s s s s s s s s s u s s s u u m u m 

AAD D5 0A Adjust two BCD digits in AL and AH. (Invalid in 64-bit mode.) 
AAD2 D5 ib Adjust two BCD digits to the immediate byte base. (Invalid in 64-bit mode.) 
eflags s s s s s s s s s u s s s m m u m u

AAM D4 0A (Invalid in 64-bit mode.) 
AAM2 D4 ib Create a pair of unpacked values to the immediate byte base. (Invalid in 64-bit mode.) 
eflags s s s s s s s s s u s s s m m u m u

AAS 3F Create an unpacked BCD number from the contents of the AL register. (Invalid in 64-bit mode.) 
eflags s s s s s s s s s u s s s u u m u m 

ADC AL, imm8 14 ib Add imm8 to AL + CF. 
ADC AX, imm16 15 iw Add imm16 to AX + CF. 
ADC EAX, imm32 15 id Add imm32 to EAX + CF. 
ADC reg/mem8, imm8 80 /2 ib Add imm8 to reg/mem8 + CF. 
ADC reg/mem16, imm16 81 /2 iw Add imm16 to reg/mem16 + CF. 
ADC reg/mem32, imm32 81 /2 id Add imm32 to reg/mem32 + CF. 
ADC reg/mem64, imm32 81 /2 id Add sign-extended imm32 to reg/mem64 + CF. 
ADC reg/mem16, imm8 83 /2 ib Add sign-extended imm8 to reg/mem16 + CF. 
ADC reg/mem32, imm8 83 /2 ib Add sign-extended imm8 to reg/mem32 + CF. 
ADC reg/mem64, imm8 83 /2 ib Add sign-extended imm8 to reg/mem64 + CF. 
ADC reg/mem8, reg8 10 /r Add reg8 to reg/mem8 + CF 
ADC reg/mem16, reg16 11 /r Add reg16 to reg/mem16 + CF. 
ADC reg/mem32, reg32 11 /r Add reg32 to reg/mem32 + CF. 
ADC reg/mem64, reg64 11 /r Add reg64 to reg/mem64 + CF. 
ADC reg8, reg/mem8 12 /r Add reg/mem8 to reg8 + CF. 
ADC reg16, reg/mem16 13 /r Add reg/mem16 to reg16 + CF. 
ADC reg32, reg/mem32 13 /r Add reg/mem32 to reg32 + CF. 
ADC reg64, reg/mem64 13 /r Add reg/mem64 to reg64 + CF.
eflags s s s s s s s s s m s s s m m m m m

ADD AL, imm8 04 ib Add imm8 to AL. 
ADD AX, imm16 05 iw Add imm16 to AX. 
ADD EAX, imm32 05 id Add imm32 to EAX. 
ADD reg/mem8, imm8 80 /0 ib Add imm8 to reg/mem8. 
ADD reg/mem16, imm16 81 /0 iw Add imm16 to reg/mem16 
ADD reg/mem32, imm32 81 /0 id Add imm32 to reg/mem32. 
ADD reg/mem64, imm32 81 /0 id Add sign-extended imm32 to reg/mem64. 
ADD reg/mem16, imm8 83 /0 ib Add sign-extended imm8 to reg/mem16 
ADD reg/mem32, imm8 83 /0 ib Add sign-extended imm8 to reg/mem32. 
ADD reg/mem64, imm8 83 /0 ib Add sign-extended imm8 to reg/mem64. 
ADD reg/mem8, reg8 00 /r Add reg8 to reg/mem8. 
ADD reg/mem16, reg16 01 /r Add reg16 to reg/mem16. 
ADD reg/mem32, reg32 01 /r Add reg32 to reg/mem32. 
ADD reg/mem64, reg64 01 /r Add reg64 to reg/mem64. 
ADD reg8, reg/mem8 02 /r Add reg/mem8 to reg8. 
ADD reg16, reg/mem16 03 /r Add reg/mem16 to reg16. 
ADD reg32, reg/mem32 03 /r Add reg/mem32 to reg32. 
ADD reg64, reg/mem64 03 /r Add reg/mem64 to reg64.
eflags s s s s s s s s s m s s s m m m m m

AND AL, imm8 24 ib AND the contents of AL with an immediate 8-bit value and store the result in AL. 
AND AX, imm16 25 iw AND the contents of AX with an immediate 16-bit value and store the result in AX. 
AND EAX, imm32 25 id AND the contents of EAX with an immediate 32-bit value and store the result in EAX. 
AND reg/mem8, imm8 80 /4 ib AND the contents of reg/mem8 with imm8. 
AND reg/mem16, imm16 81 /4 iw AND the contents of reg/mem16 with imm16. 
AND reg/mem32, imm32 81 /4 id AND the contents of reg/mem32 with imm32. 
AND reg/mem64, imm32 81 /4 id AND the contents of reg/mem64 with sign-extended imm32. 
AND reg/mem16, imm8 83 /4 ib AND the contents of reg/mem16 with a sign-extended 8-bit value. 
AND reg/mem32, imm8 83 /4 ib AND the contents of reg/mem32 with a sign-extended 8-bit value. 
AND reg/mem64, imm8 83 /4 ib AND the contents of reg/mem64 with a sign-extended 8-bit value. 
AND reg/mem8, reg8 20 /r AND the contents of an 8-bit register or memory location with the contents of an 8-bit register.
AND reg/mem16, reg16 21 /r AND the contents of a 16-bit register or memory location with the contents of a 16-bit register. 
AND reg/mem32, reg32 21 /r AND the contents of a 32-bit register or memory location with the contents of a 32-bit register. 
AND reg/mem64, reg64 21 /r AND the contents of a 64-bit register or memory location with the contents of a 64-bit register. 
AND reg8, reg/mem8 22 /r AND the contents of an 8-bit register with the contents of an 8-bit memory location or register. 
AND reg16, reg/mem16 23 /r AND the contents of a 16-bit register with the contents of a 16-bit memory location or register. 
AND reg32, reg/mem32 23 /r AND the contents of a 32-bit register with the contents of a 32-bit memory location or register. 
AND reg64, reg/mem64 23 /r AND the contents of a 64-bit register with the contents of a 64-bit memory location or register. 
eflags s s s s s s s s s 0 s s s 0 0 u m 0

BOUND reg16, mem16&mem16 62 /r Test whether a 16-bit array index is within the bounds specified by the two 16-bit values in mem16&mem16. (Invalid in 64-bit mode.) 
BOUND reg32, mem32&mem32 62 /r Test whether a 32-bit array index is within the bounds specified by the two 32-bit values in mem32&mem32. (Invalid in 64-bit mode.) 
eflags s s s s s s s s s s s s s s s s s s

BSF reg16, reg/mem16 0F BC /r Bit scan forward on the contents of reg/mem16. 
BSF reg32, reg/mem32 0F BC /r Bit scan forward on the contents of reg/mem32. 
BSF reg64, reg/mem64 0F BC /r Bit scan forward on the contents of reg/mem64 
eflags s s s s s s s s s u s s s u m u u u

BSR reg16, reg/mem16 0F BD /r Bit scan reverse on the contents of reg/mem16. 
BSR reg32, reg/mem32 0F BD /r Bit scan reverse on the contents of reg/mem32. 
BSR reg64, reg/mem64 0F BD /r Bit scan reverse on the contents of reg/mem64. 
eflags s s s s s s s s s u s s s u m u u u

BSWAP reg32 0F C8 +rd Reverse the byte order of reg32. 
BSWAP reg64 0F C8 +rq Reverse the byte order of reg64.
eflags s s s s s s s s s s s s s s s s s s

BT reg/mem16, reg16 0F A3 /r Copy the value of the selected bit to the carry flag. 
BT reg/mem32, reg32 0F A3 /r Copy the value of the selected bit to the carry flag. 
BT reg/mem64, reg64 0F A3 /r Copy the value of the selected bit to the carry flag. 
BT reg/mem16, imm8 0F BA /4 ib Copy the value of the selected bit to the carry flag. 
BT reg/mem32, imm8 0F BA /4 ib Copy the value of the selected bit to the carry flag. 
BT reg/mem64, imm8 0F BA /4 ib Copy the value of the selected bit to the carry flag.
eflags s s s s s s s s s u s s s u u u u m

BTC reg/mem16, reg16 0F BB /r Copy the value of the selected bit to the carry flag, then complement the selected bit. 
BTC reg/mem32, reg32 0F BB /r Copy the value of the selected bit to the carry flag, then complement the selected bit. 
BTC reg/mem64, reg64 0F BB /r Copy the value of the selected bit to the carry flag, then complement the selected bit. 
BTC reg/mem16, imm8 0F BA /7 ib Copy the value of the selected bit to the carry flag, then complement the selected bit. 
BTC reg/mem32, imm8 0F BA /7 ib Copy the value of the selected bit to the carry flag, then complement the selected bit. 
BTC reg/mem64, imm8 0F BA /7 ib Copy the value of the selected bit to the carry flag, then complement the selected bit.
eflags s s s s s s s s s u s s s u u u u m

BTR reg/mem16, reg16 0F B3 /r Copy the value of the selected bit to the carry flag, then clear the selected bit. 
BTR reg/mem32, reg32 0F B3 /r Copy the value of the selected bit to the carry flag, then clear the selected bit. 
BTR reg/mem64, reg64 0F B3 /r Copy the value of the selected bit to the carry flag, then clear the selected bit. 
BTR reg/mem16, imm8 0F BA /6 ib Copy the value of the selected bit to the carry flag, thenclear the selected bit. 
BTR reg/mem32, imm8 0F BA /6 ib Copy the value of the selected bit to the carry flag, then clear the selected bit. 
BTR reg/mem64, imm8 0F BA /6 ib Copy the value of the selected bit to the carry flag, then clear the selected bit.
eflags s s s s s s s s s u s s s u u u u m

BTS reg/mem16, reg16 0F AB /r Copy the value of the selected bit to the carry flag, then set the selected bit. 
BTS reg/mem32, reg32 0F AB /r Copy the value of the selected bit to the carry flag, then set the selected bit. 
BTS reg/mem64, reg64 0F AB /r Copy the value of the selected bit to the carry flag, then set the selected bit. 
BTS reg/mem16, imm8 0F BA /5 ib Copy the value of the selected bit to the carry flag, then set the selected bit. 
BTS reg/mem32, imm8 0F BA /5 ib Copy the value of the selected bit to the carry flag, then set the selected bit. 
BTS reg/mem64, imm8 0F BA /5 ib Copy the value of the selected bit to the carry flag, then set the selected bit.
eflags s s s s s s s s s u s s s u u u u m

CALL rel16off E8 iw Near call with the target specified by a 16-bit relative displacement. 
CALL rel32off E8 id Near call with the target specified by a 32-bit relative displacement. 
CALL reg/mem16 FF /2 Near call with the target specified by reg/mem16. 
CALL reg/mem32 FF /2 Near call with the target specified by reg/mem32. (There is no prefix for encoding this in 64-bit mode.) 
CALL reg/mem64 FF /2 Near call with the target specified by reg/mem64.
eflags s s s s s s s s s s s s s s s s s s

CALL FAR pntr16:16 9A cd Far call direct, with the target specified by a far pointer contained in the instruction. (Invalid in 64-bit mode.) 
CALL FAR pntr16:32 9A cp Far call direct, with the target specified by a far pointer contained in the instruction. (Invalid in 64-bit mode.) 
CALL FAR mem16:16 FF /3 Far call indirect, with the target specified by a far pointer in memory. 
CALL FAR mem16:32 FF /3 Far call indirect, with the target specified by a far pointer in memory.
eflags s s s s s s s s s s s s s s s s s s

CBW 98 Sign-extend AL into AX. 
CWDE 98 Sign-extend AX into EAX. 
CDQE 98 Sign-extend EAX into RAX.
eflags s s s s s s s s s s s s s s s s s s

CWD 99 Sign-extend AX into DX:AX. 
CDQ 99 Sign-extend EAX into EDX:EAX. 
CQO 99 Sign-extend RAX into RDX:RAX.
eflags s s s s s s s s s s s s s s s s s s

CLC F8 Clear the carry flag (CF) to zero. 
eflags s s s s s s s s s s s s s s s s s 0

CLD FC Clear the direction flag (DF) to zero. 
eflags s s s s s s s s s s 0 s s s s s s s

CFLUSH mem8 0F AE /7 flush cache line containing mem8.
eflags s s s s s s s s s s s s s s s s s s

CMC F5 Complement the carry flag (CF). 
eflags s s s s s s s s s s s s s s s s s m

CMOVO reg64, reg/mem32 0F 40 /r Move if overflow (OF = 1). 
CMOVNO reg64, reg/mem32 0F 41 /r Move if not overflow (OF = 0). 
CMOVB reg64, reg/mem32 0F 42 /r Move if below (CF = 1). 
CMOVC reg64, reg/mem32 0F 42 /r Move if carry (CF = 1). 
CMOVNAE reg64, reg/mem32 0F 42 /r Move if not above or equal (CF = 1). 
CMOVNB reg64,reg/mem32 0F 43 /r Move if not below (CF = 0). 
CMOVNC reg64,reg/mem32 0F 43 /r Move if not carry (CF = 0). 
CMOVAE reg64, reg/mem32 0F 43 /r Move if above or equal (CF = 0). 
CMOVZ reg64, reg/mem32 0F 44 /r Move if zero (ZF = 1).0F 43 /r Move if above or equal (CF = 0). 
CMOVE reg64, reg/mem32 0F 44 /r Move if equal (ZF =1). 
CMOVNZ reg64, reg/mem32 0F 45 /r Move if not zero (ZF = 0). 
CMOVNE reg64, reg/mem32 0F 45 /r Move if not equal (ZF = 0). 
CMOVBE reg64, reg/mem32 0F 46 /r Move if below or equal (CF = 1 or ZF = 1). 
CMOVNA reg64, reg/mem32 0F 46 /r Move if not above (CF = 1 or ZF = 1). 
CMOVNBE reg64,reg/mem32 0F 47 /r Move if not below or equal (CF = 0 and ZF = 0). 
CMOVA reg64, reg/mem32 0F 47 /r Move if above (CF = 0 and ZF = 0). 
CMOVS reg64, reg/mem32 0F 48 /r Move if sign (SF =1). 
CMOVNS reg64, reg/mem32 0F 49 /r Move if not sign (SF = 0). 
CMOVP reg64, reg/mem32 0F 4A /r Move if parity (PF = 1). 
CMOVPE reg64, reg/mem32 0F 4A /r Move if parity even (PF = 1). 
CMOVNP reg64, reg/mem32 0F 4B /r Move if not parity (PF = 0). 
CMOVPO reg64, reg/mem32 0F 4B /r Move if parity odd (PF = 0). 
CMOVL reg64, reg/mem32 0F 4C /r Move if less (SF <> OF). 
CMOVNGE reg64, reg/mem32 0F 4C /r Move if not greater or equal (SF <> OF). 
CMOVNL reg64, reg/mem32 0F 4D /r Move if not less (SF = OF). 
CMOVGE reg64, reg/mem32 0F 4D /r Move if greater or equal (SF = OF). 
CMOVLE reg64, reg/mem32 0F 4E /r Move if less or equal (ZF = 1 or SF <> OF). 
CMOVNG reg64, reg/mem32 0F 4E /r Move if not greater (ZF = 1 or SF <> OF). 
CMOVNLE reg64, reg/mem32 0F 4F /r Move if not less or equal (ZF = 0 and SF = OF). 
CMOVG reg64, reg/mem32 0F 4F /r Move if greater (ZF = 0 and SF = OF). 
eflags s s s s s s s s s s s s s s s s s s

CMP AL, imm8 3C ib Compare an 8-bit immediate value with the contents of the AL register. 
CMP AX, imm16 3D iw Compare a 16-bit immediate value with the contents of the AX register. 
CMP EAX, imm32 3D id Compare a 32-bit immediate value with the contents of the EAX register. 
CMP reg/mem8, imm8 80 /7 ib Compare an 8-bit immediate value with the contents of an 8-bit register or memory operand. 
CMP reg/mem16, imm16 81 /7 iw Compare a 16-bit immediate value with the contents of a 16-bit register or memory operand. 
CMP reg/mem32, imm32 81 /7 id Compare a 32-bit immediate value with the contents of a 32-bit register or memory operand. 
CMP reg/mem64, imm32 81 /7 id Compare a 32-bit signed immediate value with the contents of a 64-bit register or memory operand. 
CMP reg/mem16, imm8 83 /7 ib Compare an 8-bit signed immediate value with the contents of a 16-bit register or memory operand. 
CMP reg/mem32, imm8 83 /7 ib Compare an 8-bit signed immediate value with the contents of a 32-bit register or memory operand. 
CMP reg/mem64, imm8 83 /7 ib Compare an 8-bit signed immediate value with the contents of a 64-bit register or memory operand. 
CMP reg/mem8, reg8 38 /r Compare the contents of an 8-bit register or memory operand with the contents of an 8-bit register. 
CMP reg/mem16, reg16 39 /r Compare the contents of a 16-bit register or memory operand with the contents of a 16-bit register. 
CMP reg/mem32, reg32 39 /r Compare the contents of a 32-bit register or memory operand with the contents of a 32-bit register. 
CMP reg/mem64, reg64 39 /r Compare the contents of a 64-bit register or memory operand with the contents of a 64-bit register.
CMP reg8, reg/mem8 3A /r Compare the contents of an 8-bit register with the contents of an 8-bit register or memory operand. 
CMP reg16, reg/mem16 3B /r Compare the contents of a 16-bit register with the contents of a 16-bit register or memory operand. 
CMP reg32, reg/mem32 3B /r Compare the contents of a 32-bit register with the contents of a 32-bit register or memory operand. 
CMP reg64, reg/mem64 3B /r Compare the contents of a 64-bit register with the contents of a 64-bit register or memory operand. 
eflags s s s s s s s s s m s s s m m m m m

CMPS mem8, mem8 A6 Compare the byte at DS:rSI with the byte at ES:rDI and then increment or decrement rSI and rDI. 
CMPS mem16, mem16 A7 Compare the word at DS:rSI with the word at ES:rDI and then increment or decrement rSI and rDI. 
CMPS mem32, mem32 A7 Compare the doubleword at DS:rSI with the doubleword at ES:rDI and then increment or decrement rSI and rDI. CMPS mem64, mem64 A7 Compare the quadword at DS:rSI with the quadword at ES:rDI and then increment or decrement rSI and rDI.
CMPSB A6 Compare the byte at DS:rSI with the byte at ES:rDI and then increment or decrement rSI and rDI. 
CMPSW A7 Compare the word at DS:rSI with the word at ES:rDI and then increment or decrement rSI and rDI. 
CMPSD A7 Compare the doubleword at DS:rSI with the doubleword at ES:rDI and then increment or decrement rSI and rDI. 
CMPSQ A7 Compare the quadword at DS:rSI with the quadword at ES:rDI and then increment or decrement rSI and rDI. 
eflags s s s s s s s s s m s s s m m m m m

CMPXCHG reg/mem8, reg8 0F B0 /r Compare AL register with an 8-bit register or memory location. If equal, copy the second operand to the first operand. Otherwise, copy the first operand to AL. 
CMPXCHG reg/mem16, reg16 0F B1 /r Compare AX register with a 16-bit register or memory location. If equal, copy the second operand to the first operand. Otherwise, copy the first operand to AX. 
CMPXCHG reg/mem32, reg32 0F B1 /r Compare EAX register with a 32-bit register or memory location. If equal, copy the second operand to the first operand. Otherwise, copy the first operand to EAX. 
CMPXCHG reg/mem64, reg64 0F B1 /r Compare RAX register with a 64-bit register or memory location. If equal, copy the second operand to the first operand. Otherwise, copy the first operand to RAX.
eflags s s s s s s s s s m s s s m m m m m

CMPXCHG8B mem64 0F C7 /1 m64 Compare EDX:EAX register to 64-bit memory location. If equal, set the zero flag (ZF) to 1 and copy the ECX:EBX register to the memory location. Otherwise, copy the memory location to EDX:EAX and clear the zero flag. 
CMPXCHG16B mem128 0F C7 /1 m128 Compare RDX:RAX register to 128-bit memory location. If equal, set the zero flag (ZF) to 1 and copy the RCX:RBX register to the memory location. Otherwise, copy the memory location to RDX:RAX and clear the zero flag.
eflags s s s s s s s s s s s s s s m s s s 

CPUID 0F A2 capabilities.  EAX specifies the function number, and the data is returned in EAX, EBX, ECX, EDX.
eflags s s s s s s s s s s s s s s s s s s

DAA 27 Decimal adjust AL. (Invalid in 64-bit mode.) 
DAS 2F Decimal adjusts AL after subtraction. (Invalid in 64-bit mode.) 
eflags s s s s s s s s s u s s s m m m m m

DEC reg/mem8 FE /1 Decrement the contents of an 8-bit register or memory location by 1. 
DEC reg/mem16 FF /1 Decrement the contents of a 16-bit register or memory location by 1. 
DEC reg/mem32 FF /1 Decrement the contents of a 32-bit register or memory location by 1. 
DEC reg/mem64 FF /1 Decrement the contents of a 64-bit register or memory location by 1. 
DEC reg16 48 +rw Decrement the contents of a 16-bit register by 1. (See “REX Prefixes” on page11.) 
DEC reg32 48 +rd Decrement the contents of a 32-bit register by 1. (See “REX Prefixes” on page11.) 
eflags s s s s s s s s s u s s s m m m m m

DIV reg/mem8 F6 /6 Perform unsigned division of AX by the contents of an 8- bit register or memory location and store the quotient in AL and the remainder in AH. 
DIV reg/mem16 F7 /6 Perform unsigned division of DX:AX by the contents of a 16-bit register or memory operand store the quotient in AX and the remainder in DX. 
DIV reg/mem32 F7 /6 Perform unsigned division of EDX:EAX by the contents of a 32-bit register or memory location and store the quotient in EAX and the remainder in EDX. 
DIV reg/mem64 F7 /6 Perform unsigned division of RDX:RAX by the contents of a 64-bit register or memory location and store the quotient in RAX and the remainder in RDX.
eflags s s s s s s s s s m s s s m m m m s

ENTER imm16, 0 C8 iw 00 Create a procedure stack frame. 
ENTER imm16, 1 C8 iw 01 Create a nested stack frame for a procedure. 
ENTER imm16, imm8 C8 iw ib Create a nested stack frame for a procedure.
eflags s s s s s s s s s u s s s u u u u u

IDIV reg/mem8 F6 /7 Perform signed division of AX by the contents of an 8-bit register or memory location and store the quotient in AL and the remainder in AH. 
IDIV reg/mem16 F7 /7 Perform signed division of DX:AX by the contents of a 16-bit register or memory location and store the quotient in AX and the remainder in DX. 
IDIV reg/mem32 F7 /7 Perform signed division of EDX:EAX by the contents of a 32-bit register or memory location and store the quotient in EAX and the remainder in EDX. 
IDIV reg/mem64 F7 /7 Perform signed division of RDX:RAX by the contents of a 64-bit register or memory location and store the quotient in RAX and the remainder in RDX.
eflags s s s s s s s s s s s s s s m s s s 

IMUL AL, reg/mem8 F6 /5 IMUL reg/mem8 F6 /5 Multiply the contents of AL by the contents of an 8-bit memory or register operand and put the signed result in AX. 
IMUL AX, reg/mem16 F7 /5 Multiply the contents of AX by the contents of a 16-bit memory or register operand and put the signed result in DX:AX. 
IMUL EAX, reg/mem32 F7 /5 Multiply the contents of EAX by the contents of a 32-bit memory or register operand and put the signed result in EDX:EAX. 
IMUL RAX, reg/mem64 F7 /5 Multiply the contents of RAX by the contents of a 64-bit memory or register operand and put the signed result in RDX:RAX. 
IMUL reg16, reg/mem16 0F AF /r Multiply the contents of a 16-bit destination register by the contents of a 16-bit register or memory operand and put the signed result in the 16-bit destination register. 
IMUL reg32, reg/mem32 0F AF /r Multiply the contents of a 32-bit destination register by the contents of a 32-bit register or memory operand and put the signed result in the 32-bit destination register. 
IMUL reg64, reg/mem64 0F AF /r Multiply the contents of a 64-bit destination register by the contents of a 64-bit register or memory operand and put the signed result in the 64-bit destination register. 
IMUL reg16, reg/mem16, imm8 6B /r ib Multiply the contents of a 16-bit register or memory operand by a sign-extended immediate byte and put the signed result in the 16-bit destination register.
IMUL reg32, reg/mem32, imm8 6B /r ib Multiply the contents of a 32-bit register or memory operand by a sign-extended immediate byte and put the signed result in the 32-bit destination register. 
IMUL reg64, reg/mem64, imm8 6B /r ib Multiply the contents of a 64-bit register or memory operand by a sign-extended immediate byte and put the signed result in the 64-bit destination register. 
IMUL reg16, reg/mem16, imm16 69 /r iw Multiply the contents of a 16-bit register or memory operand by a sign-extended immediate word and put the signed result in the 16-bit destination register. 
IMUL reg32, reg/mem32, imm32 69 /r id Multiply the contents of a 32-bit register or memory operand by a sign-extended immediate double and put the signed result in the 32-bit destination register. 
IMUL reg64, reg/mem64, imm32 69 /r id Multiply the contents of a 64-bit register or memory operand by a sign-extended immediate double and put the signed result in the 64-bit destination register. 
eflags s s s s s s s s s u s s s u u u u u

IN AL, imm8 E4 ib Input a byte from the port at the address specified by imm8 and put it into the AL register. 
IN AX, imm8 E5 ib Input a word from the port at the address specified by imm8 and put it into the AX register. 
IN EAX, imm8 E5 ib Input a doubleword from the port at the address specified by imm8 and put it into the EAX register. 
IN AL, DX EC Input a byte from the port at the address specified by the DX register and put it into the AL register. 
IN AX, DX ED Input a word from the port at the address specified by the DX register and put it into the AX register. 
IN EAX, DX ED Input a doubleword from the port at the address specified by the DX register and put it into the EAX register. 
eflags s s s s s s s s s m s s s u u u u m

INC reg/mem8 FE /0 Increment the contents of an 8-bit register or memory location by 1. 
INC reg/mem16 FF /0 Increment the contents of a 16-bit register or memory location by 1. 
INC reg/mem32 FF /0 Increment the contents of a 32-bit register or memory location by 1. 
INC reg/mem64 FF /0 Increment the contents of a 64-bit register or memory location by 1. 
INC reg16 40 +rw Increment the contents of a 16-bit register by 1. (These opcodes are used as REX prefixes in 64-bit mode. See “REX Prefixes” on page11.)
INC reg32 40 +rd Increment the contents of a 32-bit register by 1. (These opcodes are used as REX prefixes in 64-bit mode. See “REX Prefixes” on page11.)
eflags s s s s s s s s s s s s s s m s s s 

INS mem8, DX 6C Input a byte from the port specified by DX, put it into the memory location specified in ES:rDI, and then increment or decrement rDI. 
INS mem16, DX 6D Input a word from the port specified by DX register, put it into the memory location specified in ES:rDI, and then increment or decrement rDI. 
INS mem32, DX 6D Input a doubleword from the port specified by DX, put it into the memory location specified in ES:rDI, and then increment or decrement rDI. 
INSB 6C Input a byte from the port specified by DX, put it into the memory location specified in ES:rDI, and then increment or decrement rDI.
INSW 6D Input a word from the port specified by DX, put it into the memory location specified in ES:rDI, and then increment or decrement rDI. 
INSD 6D Input a doubleword from the port specified by DX, put it into the memory location specified in ES:rDI, and then increment or decrement rDI. 
eflags s s s s s s s s s m s s s m m m m s

INT imm8 CD ib Call interrupt service routine specified by interrupt vector imm8.
eflags s s s s s s s s s s s s s s m s s s 

INTO CE Call overflow exception if the overflow flag is set. (Invalid in 64-bit mode.) 
eflags s s m m m 0 m s s s s m 0 m m m m m

JO rel8off 70 cb 
JO rel16off 0F 80 cw 
JO rel32off 0F 80 cd Jump if overflow (OF = 1). 
JNO rel8off 71 cb 
JNO rel16off 0F 81 cw 
JNO rel32off 0F 81 cd Jump if not overflow (OF = 0). 
JB rel8off 72 cb 
JB rel16off 0F 82 cw 
JB rel32off 0F 82 cd Jump if below (CF = 1).
eflags s s s s s s s s s s s s s s s s s s 

JNC rel8off 73 cb 
JNC rel16off 0F 83 cw 
JNC rel32off 0F 83 cd Jump if not carry (CF = 0). 
JZ rel8off 74 cb 
JZ rel16off 0F 84 cw JE rel16off 0F 84 cw 
JZ rel32off 0F 84 cd Jump if zero (ZF = 1). 
JNZ rel8off 75 cb JNE rel8off 75 cb 
JNZ rel16off 0F 85 cw JNE rel16off 0F 85 cw 
JNZ rel32off 0F 85 cd Jump if not zero (ZF = 0). 
JBE rel8off 76 cb 
JBE rel16off 0F 86 cw 
JBE rel32off 0F 86 cd Jump if below or equal (CF = 1 or ZF = 1). 
JNBE rel8off 77 cb 
JNBE rel16off 0F 87 cw 
JNBE rel32off 0F 87 cd Jump if not below or equal (CF = 0 and ZF = 0).  ; JA
JS rel8off 78 cb 
JS rel16off 0F 88 cw 
JS rel32off 0F 88 cd Jump if sign (SF = 1). 
JNS rel8off 79 cb 
JNS rel16off 0F 89 cw 
JNS rel32off 0F 89 cd Jump if not sign (SF = 0). Jump if not above or equal (CF = 1). 
JP rel8off 7A cb 
JP rel16off 0F 8A cw 
JP rel32off 0F 8A cd Jump if parity (PF = 1). ; JPE
JNP rel8off 7B cb 
JNP rel16off 0F 8B cw 
JNP rel32off 0F 8B cd Jump if not parity (PF = 0). ; JPO
JL rel8off 7C cb 
JL rel16off 0F 8C cw  
JL rel32off 0F 8C cd Jump if less (SF <> OF).  ; JNGE
JNL rel8off 7D cb 
JNL rel16off 0F 8D cw 
JNL rel32off 0F 8D cd Jump if not less (SF = OF).  ; JGE
JLE rel8off 7E cb JNG rel8off 7E cb 
JLE rel16off 0F 8E cw JNG rel16off 0F 8E cw 
JLE rel32off 0F 8E cd Jump if less or equal (ZF = 1 or SF <> OF). JNG rel32off 0F 8E cd Jump if not greater (ZF = 1 or SF <> OF). 
JNLE rel8off 7F cb JG rel8off 7F cb 
JNLE rel32off 0F 8F cd Jump if not less or equal (ZF = 0 and SF = OF). JG rel32off 0F 8F cd Jump if greater (ZF = 0 and SF = OF). 
JG rel16off 0F 8F cw 
eflags s s s s s s s s s s s s s s s s s s 

JCXZ rel8off E3 cb Jump short if the 16-bit count register (CX) is zero. 
JECXZ rel8off E3 cb Jump short if the 32-bit count register (ECX) is zero. 
JRCXZ rel8off E3 cb Jump short if the 64-bit count register (RCX) is zero. 
eflags s s s s s s s s s s s s s s s s s s 

JMP rel8off EB cb Short jump with the target specified by an 8-bit signed displacement. 
JMP rel16off E9 cw Near jump with the target specified by a 16-bit signed displacement. 
JMP rel32off E9 cd Near jump with the target specified by a 32-bit signed displacement. 
JMP reg/mem16 FF /4 Near jump with the target specified reg/mem16. 
JMP reg/mem32 FF /4 Near jump with the target specified reg/mem32. (No prefix for encoding in 64-bit mode.) 
JMP reg/mem64 FF /4 Near jump with the target specified reg/mem64.
eflags s s s s s s s s s s s s s s s s s s 

JMP FAR pntr16:16 EA cd Far jump direct, with the target specified by a far pointer contained in the instruction. (Invalid in 64-bit mode.) 
JMP FAR pntr16:32 EA cp Far jump direct, with the target specified by a far pointer contained in the instruction. (Invalid in 64-bit mode.) 
JMP FAR mem16:16 FF /5 Far jump indirect, with the target specified by a far pointer in memory. 
JMP FAR mem16:32 FF /5 Far jump indirect, with the target specified by a far pointer in memory.
eflags s s s s s s s s s s s s s s s s s s 

LAHF 9F Load the SF, ZF, AF, PF, and CF flags into the AH register. 
eflags s s s s s s s s s s s s s s s s s s 

LDS reg16, mem16:16 C5 /r Load DS:reg16 with a far pointer from memory. (Invalid in 64-bit mode.) 
LDS reg32, mem16:32 C5 /r Load DS:reg32 with a far pointer from memory. (Invalid in 64-bit mode.) 
LES reg16, mem16:16 C4 /r Load ES:reg16 with a far pointer from memory. (Invalid in 64-bit mode.) 
LES reg32, mem16:32 C4 /r Load ES:reg32 with a far pointer from memory. (Invalid in 64-bit mode.) 
LFS reg16, mem16:16 0F B4 /r Load FS:reg16 with a far pointer from memory. 
LFS reg32, mem16:32 0F B4 /r Load FS:reg32 with a far pointer from memory. 
LGS reg16, mem16:16 0F B5 /r Load GS:reg16 with a far pointer from memory. 
LGS reg32, mem16:32 0F B5 /r Load GS:reg32 with a far pointer from memory. 
LSS reg16, mem16:16 0F B2 /r Load SS:reg16 with a far pointer from memory. 
LSS reg32, mem16:32 0F B2 /r Load SS:reg32 with a far pointer from memory.
eflags s s s s s s s s s s s s s s s s s s 

LEA reg16, mem16 8D /r Store effective address in a 16-bit register. 
LEA reg32, mem32 8D /r Store effective address in a 32-bit register. 
LEA reg64, mem64 8D /r Store effective address in a 64-bit register. 
eflags s s s s s s s s s s s s s s s s s s 

LEAVE C9 Set the stack pointer register SP to the value in the BP register and pop BP. LEAVE C9 Set the stack pointer register ESP to the value in the EBP register and pop EBP. (No prefix for encoding this in 64-bit mode.) LEAVE C9 Set the stack pointer register RSP to the value in the RBP register and pop RBP. 
eflags s s s s s s s s s s s s s s s s s s 

LFENCE 0F AE E8 Force strong ordering of (serialize) load operations. 
eflags s s s s s s s s s s s s s s s s s s 

LODS mem8 AC Load byte at DS:rSI into AL and then increment or decrement rSI. 
LODS mem16 AD Load word at DS:rSI into AX and then increment or decrement rSI. 
LODS mem32 AD Load doubleword at DS:rSI into EAX and then increment or decrement rSI. 
LODS mem64 AD Load quadword at DS:rSI into RAX and then increment or decrement rSI. 
LODSB AC Load byte at DS:rSI into AL and then increment or decrement rSI. 
LODSW AD Load the word at DS:rSI into AX and then increment or decrement rSI.
eflags s s s s s s s s s s s s s s s s s s 

LODSD AD Load doubleword at DS:rSI into EAX and then increment or decrement rSI. 
LODSQ AD Load quadword at DS:rSI into RAX and then increment or decrement rSI. 
eflags s s s s s s s s s u s s s u m u u m

LOOP rel8off E2 cb Decrement rCX, then jump short if rCX is not 0. 
LOOPE rel8off E1 cb Decrement rCX, then jump short if rCX is not 0 and ZF is 1. 
LOOPNE rel8off E0 cb Decrement rCX, then Jump short if rCX is not 0 and ZF is 0. 
LOOPNZ rel8off E0 cb Decrement rCX, then Jump short if rCX is not 0 and ZF is 0. 
LOOPZ rel8off E1 cb Decrement rCX, then Jump short if rCX is not 0 and ZF is 1.
eflags s s s s s s s s s s s s s s s s s s 

LZCNT reg16, reg/mem16 F3 0F BD /r Count the number of leading zeros in reg/mem16. 
LZCNT reg32, reg/mem32 F3 0F BD /r Count the number of leading zeros in reg/mem32. 
LZCNT reg64, reg/mem64 F3 0F BD /r Count the number of leading zeros in reg/mem64.
eflags s s s s s s s s s s s s s s s s s s 

MFENCE 0F AE F0 Force strong ordering of (serialized) load and store operations. 
eflags s s s s s s s s s s s s s s s s s s 

MOV reg/mem8, reg8 88 /r Move the contents of an 8-bit register to an 8-bit destination register or memory operand. 
MOV reg/mem16, reg16 89 /r Move the contents of a 16-bit register to a 16-bit destination register or memory operand. 
MOV reg/mem32, reg32 89 /r Move the contents of a 32-bit register to a 32-bit destination register or memory operand. 
MOV reg/mem64, reg64 89 /r Move the contents of a 64-bit register to a 64-bit destination register or memory operand. 
MOV reg8, reg/mem8 8A /r Move the contents of an 8-bit register or memory operand to an 8-bit destination register.
MOV reg16, reg/mem16 8B /r Move the contents of a 16-bit register or memory operand to a 16-bit destination register. 
MOV reg32, reg/mem32 8B /r Move the contents of a 32-bit register or memory operand to a 32-bit destination register. 
MOV reg64, reg/mem64 8B /r Move the contents of a 64-bit register or memory operand to a 64-bit destination register. 
MOV reg16/32/64/mem16, segReg 8C /r Move the contents of a segment register to a 16-bit, 32- bit, or 64-bit destination register or to a 16-bit memory operand. 
MOV segReg, reg/mem16 8E /r Move the contents of a 16-bit register or memory operand to a segment register. 
MOV AL, moffset8 A0 Move 8-bit data at a specified memory offset to the AL register. 
MOV AX, moffset16 A1 Move 16-bit data at a specified memory offset to the AX register. 
MOV EAX, moffset32 A1 Move 32-bit data at a specified memory offset to the EAX register. 
MOV moffset8, AL A2 Move the contents of the AL register to an 8-bit memory offset. 
MOV moffset16, AX A3 Move the contents of the AX register to a 16-bit memory offset. 
MOV moffset32, EAX A3 Move the contents of the EAX register to a 32-bit memory offset. 
MOV moffset64, RAX A3 Move the contents of the RAX register to a 64-bit memory offset. 
MOV reg8, imm8 B0 +rb ib Move an 8-bit immediate value into an 8-bit register. 
MOV reg16, imm16 B8 +rw iw Move a 16-bit immediate value into a 16-bit register. 
MOV reg32, imm32 B8 +rd id Move an 32-bit immediate value into a 32-bit register. 
MOV reg64, imm64 B8 +rq iq Move an 64-bit immediate value into a 64-bit register. 
MOV reg/mem8, imm8 C6 /0 ib Move an 8-bit immediate value to an 8-bit register or memory operand. 
MOV reg/mem16, imm16 C7 /0 iw Move a 16-bit immediate value to a 16-bit register or memory operand. 
MOV reg/mem32, imm32 C7 /0 id Move a 32-bit immediate value to a 32-bit register or memory operand. 
MOV reg/mem64, imm32 C7 /0 id Move a 32-bit signed immediate value to a 64-bit register or memory operand. 
eflags s s s s s s s s s s s s s s s s s s 

MOVD xmm, reg/mem32 66 0F 6E /r Move 32-bit value from a general-purpose register or 32-bit memory location to an XMM register. 
MOVD xmm, reg/mem64 66 0F 6E /r Move 64-bit value from a general-purpose register or 64-bit memory location to an XMM register. 
MOVD reg/mem32, xmm 66 0F 7E /r Move 32-bit value from an XMM register to a 32-bit general-purpose register or memory location. 
MOVD reg/mem64, xmm 66 0F 7E /r Move 64-bit value from an XMM register to a 64-bit general-purpose register or memory location. 
MOVD mmx, reg/mem32 0F 6E /r Move 32-bit value from a general-purpose register or 32-bit memory location to an MMX register. 
MOVD mmx, reg/mem64 0F 6E /r Move 64-bit value from a general-purpose register or 64-bit memory location to an MMX register. 
MOVD reg/mem32, mmx 0F 7E /r Move 32-bit value from an MMX register to a 32-bit general-purpose register or memory location. 
MOVD reg/mem64, mmx 0F 7E /r Move 64-bit value from an MMX register to a 64-bit general-purpose register or memory location.
MOVMSKPD reg32, xmm 66 0F 50 /r Move sign bits 127 and 63 in an XMM register to a 32-bit general-purpose register. 
eflags s s s s s s s s s s s s s s s s s s 

MOVNTI mem32, reg32 0F C3 /r Stores a 32-bit general-purpose register value into a 32- bit memory location, minimizing cache pollution. 
MOVNTI mem64, reg64 0F C3 /r Stores a 64-bit general-purpose register value into a 64- bit memory location, minimizing cache pollution. 
eflags s s s s s s s s s s s s s s s s s s 

MOVS mem8, mem8 A4 Move byte at DS:rSI to ES:rDI, and then increment or decrement rSI and rDI. 
MOVS mem16, mem16 A5 Move word at DS:rSI to ES:rDI, and then increment or decrement rSI and rDI. 
MOVS mem32, mem32 A5 Move doubleword at DS:rSI to ES:rDI, and then increment or decrement rSI and rDI. 
MOVS mem64, mem64 A5 Move quadword at DS:rSI to ES:rDI, and then increment or decrement rSI and rDI. 
MOVSB A4 Move byte at DS:rSI to ES:rDI, and then increment or decrement rSI and rDI. 
MOVSW A5 Move word at DS:rSI to ES:rDI, and then increment or decrement rSI and rDI.
MOVSD A5 Move doubleword at DS:rSI to ES:rDI, and then increment or decrement rSI and rDI. 
MOVSQ A5 Move quadword at DS:rSI to ES:rDI, and then increment or decrement rSI and rDI. 
eflags s s s s s s s s s s s s s s s s s s 

MOVSX reg16, reg/mem8 0F BE /r Move the contents of an 8-bit register or memory location to a 16-bit register with sign extension. 
MOVSX reg32, reg/mem8 0F BE /r Move the contents of an 8-bit register or memory location to a 32-bit register with sign extension. 
MOVSX reg64, reg/mem8 0F BE /r Move the contents of an 8-bit register or memory location to a 64-bit register with sign extension. 
MOVSX reg32, reg/mem16 0F BF /r Move the contents of an 16-bit register or memory location to a 32-bit register with sign extension. 
MOVSX reg64, reg/mem16 0F BF /r Move the contents of an 16-bit register or memory location to a 64-bit register with sign extension. 
MOVSXD reg64, reg/mem32 63 /r Move the contents of a 32-bit register or memory operand to a 64-bit register with sign extension. 
eflags s s s s s s s s s s s s s s s s s s 

MOVZX reg16, reg/mem8 0F B6 /r Move the contents of an 8-bit register or memory operand to a 16-bit register with zero-extension. 
MOVZX reg32, reg/mem8 0F B6 /r Move the contents of an 8-bit register or memory operand to a 32-bit register with zero-extension. 
MOVZX reg64, reg/mem8 0F B6 /r Move the contents of an 8-bit register or memory operand to a 64-bit register with zero-extension. 
MOVZX reg32, reg/mem16 0F B7 /r Move the contents of a 16-bit register or memory operand to a 32-bit register with zero-extension. 
MOVZX reg64, reg/mem16 0F B7 /r Move the contents of a 16-bit register or memory operand to a 64-bit register with zero-extension. 
eflags s s s s s s s s s s s s s s s s s s 

MUL reg/mem8 F6 /4 Multiplies an 8-bit register or memory operand by the contents of the AL register and stores the result in the AX register. 
MUL reg/mem16 F7 /4 Multiplies a 16-bit register or memory operand by the contents of the AX register and stores the result in the DX:AX register. 
MUL reg/mem32 F7 /4 Multiplies a 32-bit register or memory operand by the contents of the EAX register and stores the result in the EDX:EAX register. 
MUL reg/mem64 F7 /4 Multiplies a 64-bit register or memory operand by the contents of the RAX register and stores the result in the RDX:RAX register. 
eflags s s s s s s s s s s s s s s s s s s 

NEG reg/mem8 F6 /3 Performs a two’s complement negation on an 8-bit register or memory operand. 
NEG reg/mem16 F7 /3 Performs a two’s complement negation on a 16-bit register or memory operand. 
NEG reg/mem32 F7 /3 Performs a two’s complement negation on a 32-bit register or memory operand. 
NEG reg/mem64 F7 /3 Performs a two’s complement negation on a 64-bit register or memory operand. 
eflags s s s s s s s s s m s s s u u u u m

XCHG AX, reg16 90 +rw Performs no operation.
eflags s s s s s s s s s m s s s m m m m m

NOT reg/mem8 F6 /2 Complements the bits in an 8-bit register or memory operand. 
NOT reg/mem16 F7 /2 Complements the bits in a 16-bit register or memory operand. 
NOT reg/mem32 F7 /2 Complements the bits in a 32-bit register or memory operand. 
NOT reg/mem64 F7 /2 Compliments the bits in a 64-bit register or memory operand. 
eflags s s s s s s s s s s s s s s s s s s 

OR AL, imm8 0C ib OR the contents of AL with an immediate 8-bit value. 
OR AX, imm16 0D iw OR the contents of AX with an immediate 16-bit value. 
OR EAX, imm32 0D id OR the contents of EAX with an immediate 32-bit value. 
OR reg/mem8, imm8 80 /1 ib OR the contents of an 8-bit register or memory operand and an immediate 8-bit value. 
OR reg/mem16, imm16 81 /1 iw OR the contents of a 16-bit register or memory operand and an immediate 16-bit value. 
OR reg/mem32, imm32 81 /1 id OR the contents of a 32-bit register or memory operand and an immediate 32-bit value. 
OR reg/mem64, imm32 81 /1 id OR the contents of a 64-bit register or memory operand and sign-extended immediate 32-bit value. 
OR reg/mem16, imm8 83 /1 ib OR the contents of a 16-bit register or memory operand and a sign-extended immediate 8-bit value. 
OR reg/mem32, imm8 83 /1 ib OR the contents of a 32-bit register or memory operand and a sign-extended immediate 8-bit value. 
OR reg/mem64, imm8 83 /1 ib OR the contents of a 64-bit register or memory operand and a sign-extended immediate 8-bit value. 
OR reg/mem8, reg8 08 /r OR the contents of an 8-bit register or memory operand with the contents of an 8-bit register. 
OR reg/mem16, reg16 09 /r OR the contents of a 16-bit register or memory operand with the contents of a 16-bit register. 
OR reg/mem32, reg32 09 /r OR the contents of a 32-bit register or memory operand with the contents of a 32-bit register. 
OR reg/mem64, reg64 09 /r OR the contents of a 64-bit register or memory operand with the contents of a 64-bit register. 
OR reg8, reg/mem8 0A /r OR the contents of an 8-bit register with the contents of an 8-bit register or memory operand.OR the contents of a 16-bit register or memory operand 
OR reg16, reg/mem16 0B /r OR the contents of a 16-bit register with the contents of a 16-bit register or memory operand. 
OR reg32, reg/mem32 0B /r OR the contents of a 32-bit register with the contents of a 32-bit register or memory operand. 
OR reg64, reg/mem64 0B /r OR the contents of a 64-bit register with the contents of a 64-bit register or memory operand. 
eflags s s s s s s s s s s s s s s s s s s 

OUT imm8, AL E6 ib Output the byte in the AL register to the port specified by an 8-bit immediate value. 
OUT imm8, AX E7 ib Output the word in the AX register to the port specified by an 8-bit immediate value. 
OUT imm8, EAX E7 ib Output the doubleword in the EAX register to the port specified by an 8-bit immediate value. 
OUT DX, AL EE Output byte in AL to the output port specified in DX. 
OUT DX, AX EF Output word in AX to the output port specified in DX. 
OUT DX, EAX EF Output doubleword in EAX to the output port specified in DX. 
eflags s s s s s s s s s 0 s s s m m u m 0

OUTS DX, mem8 6E Output the byte in DS:rSI to the port specified in DX, then increment or decrement rSI. 
OUTS DX, mem16 6F Output the word in DS:rSI to the port specified in DX, then increment or decrement rSI. 
OUTS DX, mem32 6F Output the doubleword in DS:rSI to the port specified in DX, then increment or decrement rSI. 
OUTSB 6E Output the byte in DS:rSI to the port specified in DX, then increment or decrement rSI. 
OUTSW 6F Output the word in DS:rSI to the port specified in DX, then increment or decrement rSI. 
OUTSD 6F Output the doubleword in DS:rSI to the port specified in DX, then increment or decrement rSI.Output the word in DS:rSI to the port specified in DX, 
eflags s s s s s s s s s s s s s s s s s s 

PAUSE F3 90 Provides a hint to processor that a spin loop is being 
eflags s s s s s s s s s s s s s s s s s s 

POP reg/mem16 8F /0 Pop the top of the stack into a 16-bit register or memory location. 
POP reg/mem32 8F /0 Pop the top of the stack into a 32-bit register or memory location. (No prefix for encoding this in 64-bit mode.) 
POP reg/mem64 8F /0 Pop the top of the stack into a 64-bit register or memory location. 
POP reg16 58 +rw Pop the top of the stack into a 16-bit register. 
POP reg32 58 +rd Pop the top of the stack into a 32-bit register. a(No prefix for encoding this in 64-bit mode.) 
POP reg64 58 +rq Pop the top of the stack into a 64-bit register. 
POP DS 1F Pop the top of the stack into the DS register. (Invalid in 64-bit mode.) 
POP ES 07 Pop the top of the stack into the ES register. (Invalid in 64-bit mode.) 
POP SS 17 Pop the top of the stack into the SS register. (Invalid in 64-bit mode.) Pop the top of the stack into a 64-bit register or memory executed.
POP FS 0F A1 Pop the top of the stack into the FS register. 
POP GS 0F A9 Pop the top of the stack into the GS register. 
eflags s s s s s s s s s s s s s s s s s s 

POPA 61 Pop the DI, SI, BP, SP, BX, DX, CX, and AX registers. (Invalid in 64-bit mode.) 
POPAD 61 Pop the EDI, ESI, EBP, ESP, EBX, EDX, ECX, and EAX registers. (Invalid in 64-bit mode.) 
eflags s s s s s s s s s s s s s s s s s s 

POPCNT reg16, reg/mem16 F3 0F B8 /r Count the 1s in reg/mem16. 
POPCNT reg32, reg/mem32 F3 0F B8 /r Count the 1s in reg/mem32. 
POPCNT reg64, reg/mem64 F3 0F B8 /r Count the 1s in reg/mem64. 
eflags s s s s s s s s s s s s s s s s s s 

POPF 9D Pop a word from the stack into the FLAGS register. 
POPFD 9D Pop a double word from the stack into the EFLAGS register. (No prefix for encoding this in 64-bit mode.) 
POPFQ 9D Pop a quadword from the stack to the RFLAGS register.
eflags s s s s s s s s s 0 s s s 0 m 0 0 0

PREFETCH mem8 0F 0D /0 Prefetch processor cache line into L1 data cache. 
PREFETCHW mem8 0F 0D /1 Prefetch processor cache line into L1 data cache and mark it modified.
eflags m s m m s 0 m m m m m m m m m m m m

PREFETCHNTA mem8 0F 18 /0 Move data closer to the processor using the NTA reference. 
PREFETCHT0 mem8 0F 18 /1 Move data closer to the processor using the T0 reference. 
PREFETCHT1 mem8 0F 18 /2 Move data closer to the processor using the T1 reference. 
PREFETCHT2 mem8 0F 18 /3 Move data closer to the processor using the T2 reference. 
eflags s s s s s s s s s s s s s s s s s s 

PUSH reg/mem16 FF /6 Push the contents of a 16-bit register or memory operand onto the stack. 
PUSH reg/mem32 FF /6 Push the contents of a 32-bit register or memory operand onto the stack. (No prefix for encoding this in 64-bit mode.) 
PUSH reg/mem64 FF /6 Push the contents of a 64-bit register or memory operand onto the stack. 
PUSH reg16 50 +rw Push the contents of a 16-bit register onto the stack. 
PUSH reg32 50 +rd Push the contents of a 32-bit register onto the stack. (No prefix for encoding this in 64-bit mode.) 
PUSH reg64 50 +rq Push the contents of a 64-bit register onto the stack. 
PUSH imm8 6A ib Push an 8-bit immediate value (sign-extended to 16, 32, or 64 bits) onto the stack. 
PUSH imm16 68 iw Push a 16-bit immediate value onto the stack. 
PUSH imm32 68 id Push a 32-bit immediate value onto the stack. (No prefix for encoding this in 64-bit mode.) 
PUSH imm64 68 id Push a sign-extended 32-bit immediate value onto the stack. 
PUSH CS 0E Push the CS selector onto the stack. (Invalid in 64-bit mode.)
eflags s s s s s s s s s s s s s s s s s s 

PUSH SS 16 Push the SS selector onto the stack. (Invalid in 64-bit mode.) 
PUSH DS 1E Push the DS selector onto the stack. (Invalid in 64-bit mode.) 
PUSH ES 06 Push the ES selector onto the stack. (Invalid in 64-bit mode.) 
PUSH FS 0F A0 Push the FS selector onto the stack. 
PUSH GS 0F A8 Push the GS selector onto the stack. 
eflags s s s s s s s s s s s s s s s s s s 

PUSHA 60 Push the contents of the AX, CX, DX, BX, original SP, BP, SI, and DI registers onto the stack. (Invalid in 64-bit mode.) 
PUSHAD 60 Push the contents of the EAX, ECX, EDX, EBX, original ESP, EBP, ESI, and EDI registers onto the stack. (Invalid in 64-bit mode.) 
eflags s s s s s s s s s s s s s s s s s s 

PUSHF 9C Push the FLAGS word onto the stack. 
PUSHFD 9C Push the EFLAGS doubleword onto stack. (No prefix encoding this in 64-bit mode.) 
PUSHFQ 9C Push the RFLAGS quadword onto stack.
eflags s s s s s s s s s s s s s s s s s s 

RCL reg/mem8,1 D0 /2 Rotate the 9 bits consisting of the carry flag and an 8-bit register or memory location left 1 bit. 
RCL reg/mem8, CL D2 /2 Rotate the 9 bits consisting of the carry flag and an 8-bit register or memory location left the number of bits specified in the CL register. 
RCL reg/mem8, imm8 C0 /2 ib Rotate the 9 bits consisting of the carry flag and an 8-bit register or memory location left the number of bits specified by an 8-bit immediate value. 
RCL reg/mem16, 1 D1 /2 Rotate the 17 bits consisting of the carry flag and a 16- bit register or memory location left 1 bit. 
RCL reg/mem16, CL D3 /2 Rotate the 17 bits consisting of the carry flag and a 16- bit register or memory location left the number of bits specified in the CL register. 
RCL reg/mem16, imm8 C1 /2 ib Rotate the 17 bits consisting of the carry flag and a 16- bit register or memory location left the number of bits specified by an 8-bit immediate value. 
RCL reg/mem32, 1 D1 /2 Rotate the 33 bits consisting of the carry flag and a 32- bit register or memory location left 1 bit. 
RCL reg/mem32, CL D3 /2 Rotate 33 bits consisting of the carry flag and a 32-bit register or memory location left the number of bits specified in the CL register. 
RCL reg/mem32, imm8 C1 /2 ib Rotate the 33 bits consisting of the carry flag and a 32- bit register or memory location left the number of bits specified by an 8-bit immediate value. 
RCL reg/mem64, 1 D1 /2 Rotate the 65 bits consisting of the carry flag and a 64- bit register or memory location left 1 bit.
RCL reg/mem64, CL D3 /2 Rotate the 65 bits consisting of the carry flag and a 64- bit register or memory location left the number of bits specified in the CL register. 
RCL reg/mem64, imm8 C1 /2 ib Rotates the 65 bits consisting of the carry flag and a 64- bit register or memory location left the number of bits specified by an 8-bit immediate value. 
eflags s s s s s s s s s m s s s s s s s m 

RCR reg/mem8, 1 D0 /3 Rotate the 9 bits consisting of the carry flag and an 8-bit register or memory location right 1 bit. 
RCR reg/mem8,CL D2 /3 Rotate the 9 bits consisting of the carry flag and an 8-bit register or memory location right the number of bits specified in the CL register. 
RCR reg/mem8,imm8 C0 /3 ib Rotate the 9 bits consisting of the carry flag and an 8-bit register or memory location right the number of bits specified by an 8-bit immediate value. 
RCR reg/mem16,1 D1 /3 Rotate the 17 bits consisting of the carry flag and a 16- bit register or memory location right 1 bit. 
RCR reg/mem16,CL D3 /3 Rotate the17 bits consisting of the carry flag and a 16- bit register or memory location right the number of bits specified in the CL register. 
RCR reg/mem16, imm8 C1 /3 ib Rotate the 17 bits consisting of the carry flag and a 16- bit register or memory location right the number of bits specified by an 8-bit immediate value. 
RCR reg/mem32,1 D1 /3 Rotate the 33 bits consisting of the carry flag and a 32- bit register or memory location right 1 bit. 
RCR reg/mem32,CL D3 /3 Rotate 33 bits consisting of the carry flag and a 32-bit register or memory location right the number of bits specified in the CL register. 
RCR reg/mem32, imm8 C1 /3 ib Rotate the 33 bits consisting of the carry flag and a 32- bit register or memory location right the number of bits specified by an 8-bit immediate value. 
RCR reg/mem64,1 D1 /3 Rotate the 65 bits consisting of the carry flag and a 64- bit register or memory location right 1 bit.
eflags s s s s s s s s s m s s s s s s s m

RCR reg/mem64,CL D3 /3 RCR reg/mem64,CL D3 /3 Rotate 65 bits consisting of the carry flag and a 64-bit register or memory location right the number of bits specified in the CL register. 
RCR reg/mem64, imm8 C1 /3 ib Rotate the 65 bits consisting of the carry flag and a 64- bit register or memory location right the number of bits specified by an 8-bit immediate value. 
eflags s s s s s s s s s s s s s s s s s s 

RET C3 Near return to the calling procedure. 
RET imm16 C2 iw Near return to the calling procedure then pop thspecified number of bytes from the stack. 
eflags s s s s s s s s s s s s s s s s s s 

ROL reg/mem8, 1 D0 /0 Rotate an 8-bit register or memory operand left 1 bit. 
ROL reg/mem8, CL D2 /0 Rotate an 8-bit register or memory operand left the number of bits specified in the CL register. 
ROL reg/mem8, imm8 C0 /0 ib Rotate an 8-bit register or memory operand left the number of bits specified by an 8-bit immediate value. 
ROL reg/mem16, 1 D1 /0 Rotate a 16-bit register or memory operand left 1 bit. 
ROL reg/mem16, CL D3 /0 Rotate a 16-bit register or memory operand left the number of bits specified in the CL register. 
ROL reg/mem16, imm8 C1 /0 ib Rotate a 16-bit register or memory operand left the number of bits specified by an 8-bit immediate value. 
ROL reg/mem32, 1 D1 /0 Rotate a 32-bit register or memory operand left 1 bit. 
ROL reg/mem32, CL D3 /0 Rotate a 32-bit register or memory operand left the number of bits specified in the CL register. 
ROL reg/mem32, imm8 C1 /0 ib Rotate a 32-bit register or memory operand left the number of bits specified by an 8-bit immediate value. 
ROL reg/mem64, 1 D1 /0 Rotate a 64-bit register or memory operand left 1 bit. 
ROL reg/mem64, CL D3 /0 Rotate a 64-bit register or memory operand left the number of bits specified in the CL register. 
ROL reg/mem64, imm8 C1 /0 ib Rotate a 64-bit register or memory operand left the number of bits specified by an 8-bit immediate value.
eflags s s s s s s s s s m s s s s s s s m

ROR reg/mem8, 1 D0 /1 Rotate an 8-bit register or memory location right 1 bit. 
ROR reg/mem8, CL D2 /1 Rotate an 8-bit register or memory location right the number of bits specified in the CL register. 
ROR reg/mem8, imm8 C0 /1 ib Rotate an 8-bit register or memory location right the number of bits specified by an 8-bit immediate value. 
ROR reg/mem16, 1 D1 /1 Rotate a 16-bit register or memory location right 1 bit. 
ROR reg/mem16, CL D3 /1 Rotate a 16-bit register or memory location right the number of bits specified in the CL register. 
ROR reg/mem16, imm8 C1 /1 ib Rotate a 16-bit register or memory location right the number of bits specified by an 8-bit immediate value. 
ROR reg/mem32, 1 D1 /1 Rotate a 32-bit register or memory location right 1 bit. 
ROR reg/mem32, CL D3 /1 Rotate a 32-bit register or memory location right the number of bits specified in the CL register. 
ROR reg/mem32, imm8 C1 /1 ib Rotate a 32-bit register or memory location right the number of bits specified by an 8-bit immediate value. 
ROR reg/mem64, 1 D1 /1 Rotate a 64-bit register or memory location right 1 bit. 
ROR reg/mem64, CL D3 /1 Rotate a 64-bit register or memory operand right the number of bits specified in the CL register. 
ROR reg/mem64, imm8 C1 /1 ib Rotate a 64-bit register or memory operand right the number of bits specified by an 8-bit immediate value.Rotate a 16-bit register or memory location right the 
eflags s s s s s s s s s m s s s s s s s m

SAHF 9E Loads the sign flag, the zero flag, the auxiliary flag, the parity flag, and the carry flag from the AH register into the lower 8 bits of the EFLAGS register.

SAL reg/mem8, 1 D0 /4 Shift an 8-bit register or memory location left 1 bit. 
SAL reg/mem8, CL D2 /4 Shift an 8-bit register or memory location left the number of bits specified in the CL register. 
SAL reg/mem8, imm8 C0 /4 ib Shift an 8-bit register or memory location left the number of bits specified by an 8-bit immediate value. 
SAL reg/mem16, 1 D1 /4 Shift a 16-bit register or memory location left 1 bit. 
SAL reg/mem16, CL D3 /4 Shift a 16-bit register or memory location left the number of bits specified in the CL register. 
SAL reg/mem16, imm8 C1 /4 ib Shift a 16-bit register or memory location left the number of bits specified by an 8-bit immediate value. 
SAL reg/mem32, 1 D1 /4 Shift a 32-bit register or memory location left 1 bit. 
SAL reg/mem32, CL D3 /4 Shift a 32-bit register or memory location left the number of bits specified in the CL register. 
SAL reg/mem32, imm8 C1 /4 ib Shift a 32-bit register or memory location left the number of bits specified by an 8-bit immediate value. 
SAL reg/mem64, 1 D1 /4 Shift a 64-bit register or memory location left 1 bit. 
SAL reg/mem64, CL D3 /4 Shift a 64-bit register or memory location left the number of bits specified in the CL register. 
SAL reg/mem64, imm8 C1 /4 ib Shift a 64-bit register or memory location left the number of bits specified by an 8-bit immediate value.
eflags s s s s s s s s s s s s s m m m m m

SHL reg/mem8, 1 D0 /4 Shift an 8-bit register or memory location by 1 bit. 
SHL reg/mem8, CL D2 /4 Shift an 8-bit register or memory location left the number of bits specified in the CL register. 
SHL reg/mem8, imm8 C0 /4 ib Shift an 8-bit register or memory location left the number of bits specified by an 8-bit immediate value. 
SHL reg/mem16, 1 D1 /4 Shift a 16-bit register or memory location left 1 bit. 
SHL reg/mem16, CL D3 /4 Shift a 16-bit register or memory location left the number of bits specified in the CL register. 
SHL reg/mem16, imm8 C1 /4 ib Shift a 16-bit register or memory location left the number of bits specified by an 8-bit immediate value. 
SHL reg/mem32, 1 D1 /4 Shift a 32-bit register or memory location left 1 bit. 
SHL reg/mem32, CL D3 /4 Shift a 32-bit register or memory location left the number of bits specified in the CL register. 
SHL reg/mem32, imm8 C1 /4 ib Shift a 32-bit register or memory location left the number of bits specified by an 8-bit immediate value. 
SHL reg/mem64, 1 D1 /4 Shift a 64-bit register or memory location left 1 bit. 
SHL reg/mem64, CL D3 /4 Shift a 64-bit register or memory location left the number of bits specified in the CL register. 
SHL reg/mem64, imm8 C1 /4 ib Shift a 64-bit register or memory location left the number of bits specified by an 8-bit immediate value. 
eflags s s s s s s s s s m s s s m m u m m

SAR reg/mem8, 1 D0 /7 Shift a signed 8-bit register or memory operand right 1 bit. 
SAR reg/mem8, CL D2 /7 Shift a signed 8-bit register or memory operand right the number of bits specified in the CL register. 
SAR reg/mem8, imm8 C0 /7 ib Shift a signed 8-bit register or memory operand right the number of bits specified by an 8-bit immediate value. 
SAR reg/mem16, 1 D1 /7 Shift a signed 16-bit register or memory operand right 1 bit. 
SAR reg/mem16, CL D3 /7 Shift a signed 16-bit register or memory operand right the number of bits specified in the CL register. 
SAR reg/mem16, imm8 C1 /7 ib Shift a signed 16-bit register or memory operand right the number of bits specified by an 8-bit immediate value. 
SAR reg/mem32, 1 D1 /7 Shift a signed 32-bit register or memory location 1 bit. 
SAR reg/mem32, CL D3 /7 Shift a signed 32-bit register or memory location right the number of bits specified in the CL register.
SAR reg/mem32, imm8 C1 /7 ib Shift a signed 32-bit register or memory location right the number of bits specified by an 8-bit immediate value. 
SAR reg/mem64, 1 D1 /7 Shift a signed 64-bit register or memory location right 1 bit. 
SAR reg/mem64, CL D3 /7 Shift a signed 64-bit register or memory location right the number of bits specified in the CL register. 
SAR reg/mem64, imm8 C1 /7 ib Shift a signed 64-bit register or memory location right the number of bits specified by an 8-bit immediate value. 
eflags s s s s s s s s s m s s s m m u m m

SBB AL, imm8 1C ib Subtract an immediate 8-bit value from the AL register with borrow. 
SBB AX, imm16 1D iw Subtract an immediate 16-bit value from the AX register with borrow. 
SBB EAX, imm32 1D id Subtract an immediate 32-bit value from the EAX register with borrow. 
SBB reg/mem8, imm8 80 /3 ib Subtract an immediate 8-bit value from an 8-bit register or memory location with borrow. 
SBB reg/mem16, imm16 81 /3 iw Subtract an immediate 16-bit value from a 16-bit register or memory location with borrow. 
SBB reg/mem32, imm32 81 /3 id Subtract an immediate 32-bit value from a 32-bit register or memory location with borrow. 
SBB reg/mem64, imm32 81 /3 id Subtract a sign-extended immediate 32-bit value from a 64-bit register or memory location with borrow. 
SBB reg/mem16, imm8 83 /3 ib Subtract a sign-extended 8-bit immediate value from a 16-bit register or memory location with borrow. 
SBB reg/mem32, imm8 83 /3 ib Subtract a sign-extended 8-bit immediate value from a 32-bit register or memory location with borrow. 
SBB reg/mem64, imm8 83 /3 ib Subtract a sign-extended 8-bit immediate value from a 64-bit register or memory location with borrow. 
SBB reg/mem8, reg8 18 /r Subtract the contents of an 8-bit register from an 8-bit register or memory location with borrow. 
SBB reg/mem16, reg16 19 /r Subtract the contents of a 16-bit register from a 16-bit register or memory location with borrow.
SBB reg/mem32, reg32 19 /r Subtract the contents of a 32-bit register from a 32-bit register or memory location with borrow. 
SBB reg/mem64, reg64 19 /r Subtract the contents of a 64-bit register from a 64-bit aregister or memory location with borrow. 
SBB reg8, reg/mem8 1A /r Subtract the contents of an 8-bit register or memory location from the contents of an 8-bit register with borrow. 
SBB reg16, reg/mem16 1B /r Subtract the contents of a 16-bit register or memory location from the contents of a 16-bit register with borrow. 
SBB reg32, reg/mem32 1B /r Subtract the contents of a 32-bit register or memory location from the contents of a 32-bit register with borrow. 
SBB reg64, reg/mem64 1B /r Subtract the contents of a 64-bit register or memory location from the contents of a 64-bit register with borrow. 
eflags s s s s s s s s s m s s s m m m m m

SCASB mem8 AE Compare the contents of the AL register with the byte at ES:rDI, and then increment or decrement rDI.  ;SCAS AE Compare the contents of the AL register with the byte at ES:rDI, and then increment or decrement rDI. SCASW AF Compare the contents of the AX register with the word at ES:rDI, and then increment or decrement rDI.Compare the contents of the AX register with theSCASD AF Compare the contents of the EAX register with the doubleword at ES:rDI, and then increment or decrement rDI. SCASQ AF Compare the contents of the RAX register with the quadword at ES:rDI, and then increment or decrement rDI. 
SCAS mem16 AF Compare the contents of the AX register with the word at ES:rDI, and then increment or decrement rDI. ; SCAS mem32 AF Compare the contents of the EAX register with the doubleword at ES:rDI, and then increment or decrement rDI. ; SCAS mem64 AF Compare the contents of the RAX register with the quadword at ES:rDI, and then increment or decrement rDI. 
eflags s s s s s s s s s m s s s m m m m m

SETO reg/mem8 0F 90 /0 Set byte if overflow (OF = 1). 
SETNO reg/mem8 0F 91 /0 Set byte if not overflow (OF = 0). 
SETC reg/mem8 0F 92 /0 Set byte if carry (CF = 1).  (SETB, SETNAE)
SETNC reg/mem8 0F 93 /0 Set byte if above or equal (CF = 0). (SETAE,SETNB)
SETE reg/mem8 0F 94 /0 Set byte if equal (ZF = 1).  (SETZ)
SETNE reg/mem8 0F 95 /0 Set byte if not equal (ZF = 0). (SETNZ)
SETBE reg/mem8 0F 96 /0 Set byte if below or equal (CF = 1 or ZF = 1). 
SETNA reg/mem8 0F 96 /0 Set byte if not above (CF = 1 or ZF = 1). 
SETA reg/mem8 0F 97 /0  Set byte if above (CF = 0 and ZF = 0). (SETNBE)
SETS reg/mem8 0F 98 /0 Set byte if sign (SF = 1). 
SETNS reg/mem8 0F 99 /0 Set byte if not sign (SF = 0). 
SETPE reg/mem8 0F 9A /0  Set byte if parity even (PF = 1). (SETP)
SETPO reg/mem8 0F 9B /0  Set byte if parity odd (PF = 0).Set byte if below (CF = 1). (SETNP)
SETNGE reg/mem8 0F 9C /0 Set byte if not greater or equal (SF <> OF). (SETL)
SETGE reg/mem8 0F 9D /0  Set byte if greater or equal (SF = OF). (SETNL)
SETNG reg/mem8 0F 9E /0  Set byte if not greater (ZF = 1 or SF <> OF). (SETLE)
SETG reg/mem8 0F 9F /0  Set byte if greater (ZF = 0 and SF = OF). (SETNLE)
eflags s s s s s s s s s s s s s s s s s s 

SFENCE 0F AE F8 Force strong ordering of (serialized) store operations. 
eflags s s s s s s s s s m s s s m m u m m

SHLD reg/mem16, reg16, imm8 0F A4 /r ib  Shift bits of a 16-bit destination register or memory operand to the left the number of bits specified in an 8- bit immediate value, while shifting in bits from the second operand. 
SHLD reg/mem16, reg16, CL 0F A5 /r Shift bits of a 16-bit destination register or memory operand to the left the number of bits specified in the CL register, while shifting in bits from the second operand. 
SHLD reg/mem32, reg32, imm8 0F A4 /r ib Shift bits of a 32-bit destination register or memory operand to the left the number of bits specified in an 8- bit immediate value, while shifting in bits from the second operand. 
SHLD reg/mem32, reg32, CL 0F A5 /r Shift bits of a 32-bit destination register or memory operand to the left the number of bits specified in the CL register, while shifting in bits from the second operand. 
SHLD reg/mem64, reg64, imm8 0F A4 /r ib Shift bits of a 64-bit destination register or memory operand to the left the number of bits specified in an 8- bit immediate value, while shifting in bits from the second operand. 
SHLD reg/mem64, reg64, CL 0F A5 /r Shift bits of a 64-bit destination register or memory operand to the left the number of bits specified in the CL register, while shifting in bits from the second operand.
SHR reg/mem8, 1 D0 /5 Shift an 8-bit register or memory operand right 1 bit. 
SHR reg/mem8, CL D2 /5 Shift an 8-bit register or memory operand right the number of bits specified in the CL register. 
SHR reg/mem8, imm8 C0 /5 ib Shift an 8-bit register or memory operand right the number of bits specified by an 8-bit immediate value. 
SHR reg/mem16, 1 D1 /5 Shift a 16-bit register or memory operand right 1 bit. 
SHR reg/mem16, CL D3 /5 Shift a 16-bit register or memory operand right the number of bits specified in the CL register. 
SHR reg/mem16, imm8 C1 /5 ib Shift a 16-bit register or memory operand right the number of bits specified by an 8-bit immediate value. 
SHR reg/mem32, 1 D1 /5 Shift a 32-bit register or memory operand right 1 bit. 
SHR reg/mem32, CL D3 /5 Shift a 32-bit register or memory operand right the number of bits specified in the CL register. 
SHR reg/mem32, imm8 C1 /5 ib Shift a 32-bit register or memory operand right the number of bits specified by an 8-bit immediate value. 
SHR reg/mem64, 1 D1 /5 Shift a 64-bit register or memory operand right 1 bit. 
SHR reg/mem64, CL D3 /5 Shift a 64-bit register or memory operand right the number of bits specified in the CL register. 
SHR reg/mem64, imm8 C1 /5 ib Shift a 64-bit register or memory operand right the number of bits specified by an 8-bit immediate value.
eflags s s s s s s s s s m s s s m m u m m

SHRD reg/mem16, reg16, imm8 0F AC /r ib Shift bits of a 16-bit destination register or memory operand to the right the number of bits specified in an 8- bit immediate value, while shifting in bits from the second operand. 
SHRD reg/mem16, reg16, CL 0F AD /r Shift bits of a 16-bit destination register or memory operand to the right the number of bits specified in the CL register, while shifting in bits from the second operand. 
SHRD reg/mem32, reg32, imm8 0F AC /r ib Shift bits of a 32-bit destination register or memory operand to the right the number of bits specified in an 8- bit immediate value, while shifting in bits from the second operand. 
SHRD reg/mem32, reg32, CL 0F AD /r Shift bits of a 32-bit destination register or memory operand to the right the number of bits specified in the CL register, while shifting in bits from the second operand. 
SHRD reg/mem64, reg64, imm8 0F AC /r ib Shift bits of a 64-bit destination register or memory operand to the right the number of bits specified in an 8- bit immediate value, while shifting in bits from the second operand. 
SHRD reg/mem64, reg64, CL 0F AD /r Shift bits of a 64-bit destination register or memory operand to the right the number of bits specified in the CL register, while shifting in bits from the second operand.
eflags s s s s s s s s s m s s s m m u m m

STC F9 Set the carry flag (CF) to one. 
eflags s s s s s s s s s s s s s s s s s 1

STD FD Set the direction flag (DF) to one. 
eflags s s s s s s s s s s 1 s s s s s s s

STOS mem8 AA Store the contents of the AL register to ES:rDI, and then increment or decrement rDI. 
STOS mem16 AB Store the contents of the AX register to ES:rDI, and then increment or decrement rDI. 
STOS mem32 AB Store the contents of the EAX register to ES:rDI, and then increment or decrement rDI. 
STOS mem64 AB Store the contents of the RAX register to ES:rDI, and then increment or decrement rDI. 
STOSB AA Store the contents of the AL register to ES:rDI, and then increment or decrement rDI. 
STOSW AB Store the contents of the AX register to ES:rDI, and then increment or decrement rDI. 
STOSD AB Store the contents of the EAX register to ES:rDI, and then increment or decrement rDI. 
STOSQ AB Store the contents of the RAX register to ES:rDI, and then increment or decrement rDI.
eflags s s s s s s s s s s s s s s s s s s

SUB AL, imm8 2C ib Subtract an immediate 8-bit value from the AL register and store the result in AL. 
SUB AX, imm16 2D iw Subtract an immediate 16-bit value from the AX register and store the result in AX. 
SUB EAX, imm32 2D id Subtract an immediate 32-bit value from the EAX register and store the result in EAX. 
SUB reg/mem8, imm8 80 /5 ib Subtract an immediate 8-bit value from an 8-bit destination register or memory location. 
SUB reg/mem16, imm16 81 /5 iw Subtract an immediate 16-bit value from a 16-bit destination register or memory location. 
SUB reg/mem32, imm32 81 /5 id Subtract an immediate 32-bit value from a 32-bit destination register or memory location. 
SUB reg/mem64, imm32 81 /5 id Subtract a sign-extended immediate 32-bit value from a 64-bit destination register or memory location. 
SUB reg/mem16, imm8 83 /5 ib Subtract a sign-extended immediate 8-bit value from a 16-bit register or memory location. 
SUB reg/mem32, imm8 83 /5 ib Subtract a sign-extended immediate 8-bit value from a 32-bit register or memory location. 
SUB reg/mem64, imm8 83 /5 ib Subtract a sign-extended immediate 8-bit value from a 64-bit register or memory location. 
SUB reg/mem8, reg8 28 /r Subtract the contents of an 8-bit register from an 8-bit destination register or memory location. 
SUB reg/mem16, reg16 29 /r Subtract the contents of a 16-bit register from a 16-bit destination register or memory location. 
SUB reg/mem32, reg32 29 /r Subtract the contents of a 32-bit register from a 32-bit destination register or memory location. 
SUB reg/mem64, reg64 29 /r Subtract the contents of a 64-bit register from a 64-bit destination register or memory location.
SUB reg8, reg/mem8 2A /r Subtract the contents of an 8-bit register or memory operand from an 8-bit destination register. 
SUB reg16, reg/mem16 2B /r Subtract the contents of a 16-bit register or memory operand from a 16-bit destination register. 
SUB reg32, reg/mem32 2B /r Subtract the contents of a 32-bit register or memory operand from a 32-bit destination register. 
SUB reg64, reg/mem64 2B /r Subtract the contents of a 64-bit register or memory operand from a 64-bit destination register. 
eflags s s s s s s s s s m s s s m m m m m

TEST AL, imm8 A8 ib AND an immediate 8-bit value with the contents of the AL register and set rFLAGS to reflect the result. 
TEST AX, imm16 A9 iw AND an immediate 16-bit value with the contents of the AX register and set rFLAGS to reflect the result. 
TEST EAX, imm32 A9 id AND an immediate 32-bit value with the contents of the EAX register and set rFLAGS to reflect the result. 
TEST reg/mem8, imm8 F6 /0 ib AND an immediate 8-bit value with the contents of an 8- bit register or memory operand and set rFLAGS to reflect the result. 
TEST reg/mem16, imm16 F7 /0 iw AND an immediate 16-bit value with the contents of a 16-bit register or memory operand and set rFLAGS to reflect the result. 
TEST reg/mem32, imm32 F7 /0 id AND an immediate 32-bit value with the contents of a 32-bit register or memory operand and set rFLAGS to reflect the result. 
TEST reg/mem64, imm32 F7 /0 id AND a sign-extended immediate32-bit value with the contents of a 64-bit register or memory operand and set rFLAGS to reflect the result. 
TEST reg/mem8, reg8 84 /r AND the contents of an 8-bit register with the contents of an 8-bit register or memory operand and set rFLAGS to reflect the result. 
TEST reg/mem16, reg16 85 /r AND the contents of a 16-bit register with the contents of a 16-bit register or memory operand and set rFLAGS to reflect the result. 
TEST reg/mem32, reg32 85 /r AND the contents of a 32-bit register with the contents of a 32-bit register or memory operand and set rFLAGS to reflect the result. 
TEST reg/mem64, reg64 85 /r AND the contents of a 64-bit register with the contents of a 64-bit register or memory operand and set rFLAGS to reflect the result.the result. 
eflags s s s s s s s s s 0 s s s m m u m 0

XADD reg/mem8, reg8 0F C0 /r contents of an 8-bit destination register or memory operand and load their sum into the destination. 
XADD reg/mem16, reg16 0F C1 /r Exchange the contents of a 16-bit register with the contents of a 16-bit destination register or memory operand and load their sum into the destination. 
XADD reg/mem32, reg32 0F C1 /r Exchange the contents of a 32-bit register with the contents of a 32-bit destination register or memory operand and load their sum into the destination. 
XADD reg/mem64, reg64 0F C1 /r Exchange the contents of a 64-bit register with the contents of a 64-bit destination register or memory operand and load their sum into the destination. 
eflags s s s s s s s s s m s s s m m m m m

XCHG AX, reg16 90 +rw Exchange the contents of the AX register with the contents of a 16-bit register. 
XCHG reg16, AX 90 +rw Exchange the contents of a 16-bit register with the contents of the AX register. 
XCHG EAX, reg32 90 +rd Exchange the contents of the EAX register with the contents of a 32-bit register. 
XCHG reg32, EAX 90 +rd Exchange the contents of a 32-bit register with the contents of the EAX register. 
XCHG reg64, RAX 90 +rq Exchange the contents of a 64-bit register with the contents of the RAX register. 
XCHG reg/mem8, reg8 86 /r Exchange the contents of an 8-bit register with the contents of an 8-bit register or memory operand. 
XCHG reg8, reg/mem8 86 /r Exchange the contents of an 8-bit register or memory operand with the contents of an 8-bit register. 
XCHG reg/mem16, reg16 87 /r Exchange the contents of a 16-bit register with the contents of a 16-bit register or memory operand. 
XCHG reg16, reg/mem16 87 /r Exchange the contents of a 16-bit register or memory operand with the contents of a 16-bit register. 
XCHG reg/mem32, reg32 87 /r Exchange the contents of a 32-bit register with the contents of a 32-bit register or memory operand. 
XCHG reg32, reg/mem32 87 /r Exchange the contents of a 32-bit register or memory operand with the contents of a 32-bit register. 
XCHG reg/mem64, reg64 87 /r Exchange the contents of a 64-bit register with the contents of a 64-bit register or memory operand. 
XCHG reg64, reg/mem64 87 /r Exchange the contents of a 64-bit register or memory operand with the contents of a 64-bit register.
eflags s s s s s s s s s s s s s s s s s s

XLAT mem8 D7 Set AL to the contents of DS:[rBX + unsigned AL]. 
XLATB D7 Set AL to the contents of DS:[rBX + unsigned AL].
eflags s s s s s s s s s s s s s s s s s s

XOR AL, imm8 34 ib XOR the contents of AL with an immediate 8-bit operand and store the result in AL. 
XOR AX, imm16 35 iw XOR the contents of AX with an immediate 16-bit operand and store the result in AX. 
XOR EAX, imm32 35 id XOR the contents of EAX with an immediate 32-bit operand and store the result in EAX. 
XOR reg/mem8, imm8 80 /6 ib XOR the contents of an 8-bit destination register or memory operand with an 8-bit immediate value and store the result in the destination. 
XOR reg/mem16, imm16 81 /6 iw XOR the contents of a 16-bit destination register or memory operand with a 16-bit immediate value and store the result in the destination. 
XOR reg/mem32, imm32 81 /6 id XOR the contents of a 32-bit destination register or memory operand with a 32-bit immediate value and store the result in the destination. 
XOR reg/mem64, imm32 81 /6 id XOR the contents of a 64-bit destination register or memory operand with a sign-extended 32-bit immediate value and store the result in the destination. 
XOR reg/mem16, imm8 83 /6 ib XOR the contents of a 16-bit destination register or memory operand with a sign-extended 8-bit immediate value and store the result in the destination.
XOR reg/mem32, imm8 83 /6 ib XOR reg/mem32, imm8 83 /6 ib XOR the contents of a 32-bit destination register or memory operand with a sign-extended 8-bit immediate value and store the result in the destination. 
XOR reg/mem64, imm8 83 /6 ib XOR the contents of a 64-bit destination register or memory operand with a sign-extended 8-bit immediate value and store the result in the destination. 
XOR reg/mem8, reg8 30 /r XOR the contents of an 8-bit destination register or memory operand with the contents of an 8-bit register and store the result in the destination. 
XOR reg/mem16, reg16 31 /r XOR the contents of a 16-bit destination register or memory operand with the contents of a 16-bit register and store the result in the destination. 
XOR reg/mem32, reg32 31 /r XOR the contents of a 32-bit destination register or memory operand with the contents of a 32-bit register and store the result in the destination. 
XOR reg/mem64, reg64 31 /r XOR the contents of a 64-bit destination register or memory operand with the contents of a 64-bit register and store the result in the destination. 
XOR reg8, reg/mem8 32 /r XOR the contents of an 8-bit destination register with the contents of an 8-bit register or memory operand and store the results in the destination. 
XOR reg16, reg/mem16 33 /r XOR the contents of a 16-bit destination register with the contents of a 16-bit register or memory operand and store the results in the destination. 
XOR reg32, reg/mem32 33 /r XOR the contents of a 32-bit destination register with the contents of a 32-bit register or memory operand and store the results in the destination. 
XOR reg64, reg/mem64 33 /r XOR the contents of a 64-bit destination register with the contents of a 64-bit register or memory operand and store the results in the destination. 
eflags s s s s s s s s s 0 s s s m m u m 0

HLT F4 Halt instruction execution. 
eflags s s s s s s s s s s s s s s s s s s

INT3 CC Trap to debugger at Interrupt 3.
SYSCALL 0F 05 Call operating system.Related Instructions 
SYSENTER 0F 34 Call operating system.
eflags x x x x x x x x x x x x x x x x x x