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| Name | Regs | Opcode | Proc | Description |
|---|---|---|---|---|
| AAA | 00110111 | 8086 | ASCII Adjust After Addition | |
| AAD | Imm8 | 11010101 | Pentium | ASCII Adjust Register AX Before Division |
| 1101010100001010 | 8086 | ASCII Adjust Register AX Before Division | ||
| AAM | Imm8 | 11010100 | Pentium | ASCII Adjust AX Register After Multiplication |
| 1101010000001010 | 8086 | ASCII Adjust AX Register After Multiplication | ||
| AAS | 00111111 | 8086 | ASCII Adjust AL Register After Substraction | |
| ADC | Reg,Reg | 0001001woorrrmmm | 8086 | Add Integers with Carry |
| Mem,Reg | 0001000woorrrmmm | 8086 | Add Integers with Carry | |
| Reg,Mem | 0001001woorrrmmm | 8086 | Add Integers with Carry | |
| Acc,Imm | 0001010w | 8086 | Add Integers with Carry | |
| Reg,Imm8 | 1000001woo010mmm | 8086 | Add Integers with Carry | |
| Mem,Imm8 | 1000001woo010mmm | 8086 | Add Integers with Carry | |
| Reg,Imm | 1000000woo010mmm | 8086 | Add Integers with Carry | |
| Mem,Imm | 1000000woo010mmm | 8086 | Add Integers with Carry | |
| ADD | Reg,Reg | 0000001woorrrmmm | 8086 | Add Integers |
| Mem,Reg | 0000000woorrrmmm | 8086 | Add Integers | |
| Reg,Mem | 0000001woorrrmmm | 8086 | Add Integers | |
| Acc,Imm | 0000010w | 8086 | Add Integers | |
| Reg,Imm8 | 1000001woo000mmm | 8086 | Add Integers | |
| Mem,Imm8 | 1000001woo000mmm | 8086 | Add Integers | |
| Reg,Imm | 1000000woo000mmm | 8086 | Add Integers | |
| Mem,Imm | 1000000woo000mmm | 8086 | Add Integers | |
| AND | Reg,Reg | 0010001woorrrmmm | 8086 | Logical AND |
| Mem,Reg | 0010000woorrrmmm | 8086 | Logical AND | |
| Reg,Mem | 0010001woorrrmmm | 8086 | Logical AND | |
| Acc,Imm | 0010010w | 8086 | Logical AND | |
| Reg,Imm8 | 1000001woo100mmm | 8086 | Logical AND | |
| Mem,Imm8 | 1000001woo100mmm | 8086 | Logical AND | |
| Reg,Imm | 1000000woo100mmm | 8086 | Logical AND | |
| Mem,Imm | 1000000woo100mmm | 8086 | Logical AND | |
| ARPL | Reg16,Reg16 | 01100011oorrrmmm | 80286 | Adjust Requester Privilege Level of Selector |
| Mem16,Reg16 | 01100011oorrrmmm | 80286 | Adjust Requester Privilege Level of Selector | |
| BOUND | Reg16,Mem32 | 01100010oorrrmmm | 80186 | Check Array Index Against Bounds |
| Reg32,Mem64 | 01100010oorrrmmm | 80386 | Check Array Index Against Bounds | |
| BSF | RegWord,RegWord | 0000111110111100oorrrmmm | 80386 | Bit Scan Forward |
| RegWord,MemWord | 0000111110111100oorrrmmm | 80386 | Bit Scan Forward | |
| BSR | RegWord,RegWord | 0000111110111101oorrrmmm | 80386 | Bit Scan Reverse |
| RegWord,MemWord | 0000111110111101oorrrmmm | 80386 | Bit Scan Reverse | |
| BSWAP | RegWord | 0000111111001rrr | 80486 | Byte swap |
| BT | RegWord,Imm8 | 0000111110111010oo100mmm | 80386 | Bit Test |
| MemWord,Imm8 | 0000111110111010oo100mmm | 80386 | Bit Test | |
| RegWord,RegWord | 0000111110100011oorrrmmm | 80386 | Bit Test | |
| MemWord,RegWord | 0000111110100011oorrrmmm | 80386 | Bit Test | |
| BTC | RegWord,Imm8 | 0000111110111010oo111mmm | 80386 | Bit Test and Complement |
| MemWord,Imm8 | 0000111110111010oo111mmm | 80386 | Bit Test and Complement | |
| RegWord,RegWord | 0000111110111011oorrrmmm | 80386 | Bit Test and Complement | |
| MemWord,RegWord | 0000111110111011oorrrmmm | 80386 | Bit Test and Complement | |
| BTR | RegWord,Imm8 | 0000111110111010oo110mmm | 80386 | Bit Test and Reset |
| MemWord,Imm8 | 0000111110111010oo110mmm | 80386 | Bit Test and Reset | |
| RegWord,RegWord | 0000111110110011oorrrmmm | 80386 | Bit Test and Reset | |
| MemWord,RegWord | 0000111110110011oorrrmmm | 80386 | Bit Test and Reset | |
| BTS | RegWord,Imm8 | 0000111110111010oo101mmm | 80386 | Bit Test and Set |
| MemWord,Imm8 | 0000111110111010oo101mmm | 80386 | Bit Test and Set | |
| RegWord,RegWord | 0000111110101011oorrrmmm | 80386 | Bit Test and Set | |
| MemWord,RegWord | 0000111110101011oorrrmmm | 80386 | Bit Test and Set | |
| CBW | 10011000 | 8086 | Convert Byte to Word | |
| CDQ | 10011001 | 80386 | Convert Doubleword to Quad-Word | |
| CLC | 11111000 | 8086 | Clear Carry Flag (CF) | |
| CLD | 11111100 | 8086 | Clear Direction Flag (DF) | |
| CLI | 11111010 | 8086 | Clear Interrupt Flag (IF) | |
| CLTS | 0000111100000110 | 80286 | Clear Task-Switched Flag in Control Register Zero | |
| CMC | 11110101 | 8086 | Complementer Carry Flag (CF) | |
| CMOVcc | Reg,Reg | 000011110100ccccoorrrmmm | PentiumPro | Conditional Move |
| Reg,Mem | 000011110100ccccoorrrmmm | PentiumPro | Conditional Move | |
| CMP | Reg,Reg | 0011101woorrrmmm | 8086 | Compare |
| Mem,Reg | 0011100woorrrmmm | 8086 | Compare | |
| Reg,Mem | 0011101woorrrmmm | 8086 | Compare | |
| Acc,Imm | 0011110w | 8086 | Compare | |
| Reg,Imm8 | 1000001woo111mmm | 8086 | Compare | |
| Mem,Imm8 | 1000001woo111mmm | 8086 | Compare | |
| Reg,Imm | 1000000woo111mmm | 8086 | Compare | |
| Mem,Imm | 1000000woo111mmm | 8086 | Compare | |
| CMPSB | 10100110 | 8086 | Compare String - Byte | |
| CMPSW | 10100111 | 8086 | Compare String - Word | |
| CMPSD | 10100111 | 80386 | Compare String - Doubleword | |
| CMPXCHG | Reg,Reg | 000011111011000woorrrmmm | 80486 | Compare and Exchange |
| Mem,Reg | 000011111011000woorrrmmm | 80486 | Compare and Exchange | |
| CMPXCHG8B | Mem64 | 0000111111000111oo001mmm | Pentium | Compare and Exchange 8 Bytes |
| CPUID | 0000111110100010 | Pentium | CPU Identification code to EAX | |
| CWD | 10011001 | 8086 | Convert Word to Doubleword | |
| CWDE | 10011000 | 80386 | Convert Word to Extended Doubleword | |
| DAA | 00100111 | 8086 | Decimal Adjust Register After Addition | |
| DAS | 00101111 | 8086 | Decimal Adjust AL Register After Substraction | |
| DEC | RegWord | 01001rrr | 8086 | Decrement by One |
| Reg | 1111111woo001mmm | 8086 | Decrement by One | |
| Mem | 1111111woo001mmm | 8086 | Decrement by One | |
| DIV | Reg | 1111011woo110mmm | 8086 | Unsigned Integer Divide |
| Mem | 1111011woo110mmm | 8086 | Unsigned Integer Divide | |
| ENTER | Imm16,Imm8 | 11001000 | 80186 | Make Stack Frame for Procedure Parameter |
| HLT | 11110100 | 8086 | Halt | |
| IDIV | Reg | 1111011woo111mmm | 8086 | Signed Divide |
| Mem | 1111011woo111mmm | 8086 | Signed Divide | |
| IMUL | RegWord,RegWord,Imm8 | 01101011oorrrmmm | 80186 | Signed Integer Multiply |
| RegWord,MemWord,Imm8 | 01101011oorrrmmm | 80186 | Signed Integer Multiply | |
| RegWord,RegWord,Imm | 01101001oorrrmmm | 80186 | Signed Integer Multiply | |
| RegWord,MemWord,Imm | 01101001oorrrmmm | 80186 | Signed Integer Multiply | |
| RegWord,Imm8 | 0110101111rrrqqq | 80186 | Signed Integer Multiply | |
| RegWord,Imm | 0110100111rrrqqq | 80186 | Signed Integer Multiply | |
| RegWord,RegWord | 0000111110101111oorrrmmm | 80386 | Signed Integer Multiply | |
| RegWord,MemWord | 0000111110101111oorrrmmm | 80386 | Signed Integer Multiply | |
| Reg | 1111011woo101mmm | 8086 | Signed Integer Multiply | |
| Mem | 1111011woo101mmm | 8086 | Signed Integer Multiply | |
| IN | Acc,Imm8 | 1110010w | 8086 | Input from Port |
| Acc,DX | 1110110w | 8086 | Input from Port | |
| INC | RegWord | 01000rrr | 8086 | Increment by 1 |
| Reg | 1111111woo000mmm | 8086 | Increment by 1 | |
| Mem | 1111111woo000mmm | 8086 | Increment by 1 | |
| INSB | 01101100 | 80186 | Input Byte | |
| INSW | 01101101 | 80186 | Input Word | |
| INSD | 01101101 | 80386 | Input DoubleWord | |
| INT | 3 | 11001100 | 8086 | Call to Interrupt Procedure |
| Imm8 | 11001101 | 8086 | Call to Interrupt Procedure | |
| INTO | 11001110 | 8086 | Interrupt on Overflow | |
| INVD | 0000111100001000 | 80486 | Invalidate data cache | |
| INVLPG | Mem | 0000111100000001oo111mmm | 80486 | Invalidate TBL entry |
| IRET | 11001111 | 8086 | Return from Interrupt | |
| IRETD | 11001111 | 80386 | Return from Interrupt - 32-bit Mode | |
| LAHF | 10011111 | 8086 | Load Flags into AH Register | |
| LAR | RegWord,RegWord | 0000111100000010oorrrmmm | 80286 | Load Access Rights Byte |
| RegWord,MemWord | 0000111100000010oorrrmmm | 80286 | Load Access Rights Byte | |
| LDS | Reg16,Mem32 | 11000101oorrrmmm | 8086 | Load Pointer Using DS |
| Reg32,Mem64 | 11000101oorrrmmm | 80386 | Load Pointer Using DS | |
| LES | Reg16,Mem32 | 11000100oorrrmmm | 8086 | Load Pointer Using ES |
| Reg32,Mem64 | 11000100oorrrmmm | 80386 | Load Pointer Using ES | |
| LFS | Reg16,Mem32 | 0000111110110100oorrrmmm | 80386 | Load Pointer Using FS |
| Reg32,Mem64 | 0000111110110100oorrrmmm | 80386 | Load Pointer Using FS | |
| LGS | Reg16,Mem32 | 0000111110110101oorrrmmm | 80386 | Load Pointer Using GS |
| Reg32,Mem64 | 0000111110110101oorrrmmm | 80386 | Load Pointer Using GS | |
| LSS | Reg16,Mem32 | 0000111110110010oorrrmmm | 80386 | Load Pointer Using SS |
| Reg32,Mem64 | 0000111110110010oorrrmmm | 80386 | Load Pointer Using SS | |
| LEA | RegWord,Mem | 10001101oorrrmmm | 8086 | Load Effective Address |
| LEAVE | 11001001 | 80186 | High Level Procedure Exit | |
| LGDT | Mem64 | 0000111100000001oo010mmm | 80286 | Load Global Descriptor Table |
| LIDT | Mem64 | 0000111100000001oo011mmm | 80286 | Load Interrupt Descriptor Table |
| LLDT | Reg16 | 0000111100000000oo010mmm | 80286 | Load Local Descriptor Table |
| Mem16 | 0000111100000000oo010mmm | 80286 | Load Local Descriptor Table | |
| LMSW | Reg16 | 0000111100000001oo110mmm | 80286 | Load Machine Status Word |
| Mem16 | 0000111100000001oo110mmm | 80286 | Load Machine Status Word | |
| LODSB | 10101100 | 8086 | Load Byte | |
| LODSW | 10101101 | 8086 | Load Word | |
| LODSD | 10101101 | 80386 | Load Doubleword | |
| LSL | RegWord,RegWord | 0000111100000011oorrrmmm | 80286 | Load Segment Limit |
| RegWord,MemWord | 0000111100000011oorrrmmm | 80286 | Load Segment Limit | |
| LTR | Reg16 | 0000111100000000oo011mmm | 80286 | Load Task Register |
| Mem16 | 0000111100000000oo011mmm | 80286 | Load Task Register | |
| MOV | MemOfs,Acc | 1010001w | 8086 | Move Data |
| Acc,MemOfs | 1010000w | 8086 | Move Data | |
| Reg,Imm | 1011wrrr | 8086 | Move Data | |
| Mem,Imm | 1100011woo000mmm | 8086 | Move Data | |
| Reg,Reg | 1000101woorrrmmm | 8086 | Move Data | |
| Reg,Mem | 1000101woorrrmmm | 8086 | Move Data | |
| Mem,Reg | 1000100woorrrmmm | 8086 | Move Data | |
| Reg16,Seg | 10001100oosssmmm | 8086 | Move Data | |
| Seg,Reg16 | 10001110oosssmmm | 8086 | Move Data | |
| Mem16,Seg | 10001100oosssmmm | 8086 | Move Data | |
| Seg,Mem16 | 10001110oosssmmm | 8086 | Move Data | |
| Reg32,CRn | 000011110010000011sssrrr | 80386 | Move Data | |
| CRn,Reg32 | 000011110010001011sssrrr | 80386 | Move Data | |
| Reg32,DRn | 000011110010000111sssrrr | 80386 | Move Data | |
| DRn,Reg32 | 000011110010001111sssrrr | 80386 | Move Data | |
| Reg32,TRn | 000011110010010011sssrrr | 80386 | Move Data | |
| TRn,Reg32 | 000011110010011011sssrrr | 80386 | Move Data | |
| MOVSB | 10100100 | 8086 | Move Byte | |
| MOVSW | 10100101 | 8086 | Move Word | |
| MOVSD | 10100101 | 80386 | Move Doubleword | |
| MOVSX | RegWord,Reg8 | 0000111110111110oorrrmmm | 80386 | Move with Sign Extension |
| RegWord,Mem8 | 0000111110111110oorrrmmm | 80386 | Move with Sign Extension | |
| RegWord,Reg16 | 0000111110111111oorrrmmm | 80386 | Move with Sign Extension | |
| RegWord,Mem16 | 0000111110111111oorrrmmm | 80386 | Move with Sign Extension | |
| MOVZX | RegWord,Reg8 | 0000111110110110oorrrmmm | 80386 | Move with Zero Extension |
| RegWord,Mem8 | 0000111110110110oorrrmmm | 80386 | Move with Zero Extension | |
| RegWord,Reg16 | 0000111110110111oorrrmmm | 80386 | Move with Zero Extension | |
| RegWord,Mem16 | 0000111110110111oorrrmmm | 80386 | Move with Zero Extension | |
| MUL | Reg | 1111011woo100mmm | 8086 | Unsigned Integer Multiply of AL, AX or EAX |
| Mem | 1111011woo100mmm | 8086 | Unsigned Integer Multiply of AL, AX or EAX | |
| NEG | Reg | 1111011woo011mmm | 8086 | Negate(Two's Complement) |
| Mem | 1111011woo011mmm | 8086 | Negate(Two's Complement) | |
| NOP | 10010000 | 8086 | No Operation | |
| NOT | Reg | 1111011woo010mmm | 8086 | Negate(One's Complement) |
| Mem | 1111011woo010mmm | 8086 | Negate(One's Complement) | |
| OR | Reg,Reg | 0000101woorrrmmm | 8086 | Logical Inclusive OR |
| Mem,Reg | 0000100woorrrmmm | 8086 | Logical Inclusive OR | |
| Reg,Mem | 0000101woorrrmmm | 8086 | Logical Inclusive OR | |
| Acc,Imm | 0000110w | 8086 | Logical Inclusive OR | |
| Reg,Imm8 | 1000001woo001mmm | 8086 | Logical Inclusive OR | |
| Mem,Imm8 | 1000001woo001mmm | 8086 | Logical Inclusive OR | |
| Reg,Imm | 1000000woo001mmm | 8086 | Logical Inclusive OR | |
| Mem,Imm | 1000000woo001mmm | 8086 | Logical Inclusive OR | |
| OUT | Imm8,Acc | 1110011w | 8086 | Output To Port |
| DX,Acc | 1110111w | 8086 | Output To Port | |
| OUTSB | 01101110 | 80186 | Output Byte | |
| OUTSW | 01101111 | 80186 | Output Word | |
| OUTSD | 01101111 | 80386 | Output Doubleword | |
| POP | RegWord | 01011rrr | 8086 | Pop a Word from the Stack |
| MemWord | 10001111oo000mmm | 8086 | Pop a Word from the Stack | |
| SegOld | 00sss111 | 8086 | Pop a Word from the Stack | |
| Seg | 0000111110sss001 | 80386 | Pop a Word from the Stack | |
| POPA | 01100001 | 80186 | POP All Registers | |
| POPAD | 01100001 | 80386 | POP All Registers - 32-bit Mode | |
| POPF | 10011101 | 8086 | POP Stack into FLAGS | |
| POPFD | 10011101 | 80386 | POP Stack into EFLAGS | |
| PUSH | RegWord | 01010rrr | 8086 | Push Operand onto Stack |
| MemWord | 11111111oo110mmm | 8086 | Push Operand onto Stack | |
| SegOld | 00sss110 | 8086 | Push Operand onto Stack | |
| Seg | 0000111110sss000 | 80386 | Push Operand onto Stack | |
| Imm8 | 01101010 | 80186 | Push Operand onto Stack | |
| Imm | 01101000 | 80186 | Push Operand onto Stack | |
| PUSHW | Imm16 | 01101000 | 80286 | PUSH Word |
| PUSHD | Imm32 | 01101000 | 80386 | PUSH Double Word |
| PUSHA | 01100000 | 80186 | PUSH All Registers | |
| PUSHAD | 01100000 | 80386 | PUSH All Registers - 32-bit Mode | |
| PUSHF | 10011100 | 8086 | PUSH FLAGS | |
| PUSHFD | 10011100 | 80386 | PUSH EFLAGS | |
| RCL | Reg,1 | 1101000woo010mmm | 8086 | Rotate Left through Carry - Uses CF for Extension |
| Mem,1 | 1101000woo010mmm | 8086 | Rotate Left through Carry - Uses CF for Extension | |
| Reg,CL | 1101001woo010mmm | 8086 | Rotate Left through Carry - Uses CF for Extension | |
| Mem,CL | 1101001woo010mmm | 8086 | Rotate Left through Carry - Uses CF for Extension | |
| Reg,Imm8 | 1100000woo010mmm | 80186 | Rotate Left through Carry - Uses CF for Extension | |
| Mem,Imm8 | 1100000woo010mmm | 80186 | Rotate Left through Carry - Uses CF for Extension | |
| RCR | Reg,1 | 1101000woo011mmm | 8086 | Rotate Right through Carry - Uses CF for Extension |
| Mem,1 | 1101000woo011mmm | 8086 | Rotate Right through Carry - Uses CF for Extension | |
| Reg,CL | 1101001woo011mmm | 8086 | Rotate Right through Carry - Uses CF for Extension | |
| Mem,CL | 1101001woo011mmm | 8086 | Rotate Right through Carry - Uses CF for Extension | |
| Reg,Imm8 | 1100000woo011mmm | 80186 | Rotate Right through Carry - Uses CF for Extension | |
| Mem,Imm8 | 1100000woo011mmm | 80186 | Rotate Right through Carry - Uses CF for Extension | |
| RDMSR | 0000111100110010 | Pentium | Read from Model Specific Register | |
| RDTSC | 0000111101010001 | Pentium | Read Timwatamp Counter | |
| RET | NEAR | 11000011 | 8086 | Return from subprocedure |
| RET | imm NEAR | 11000010 | 8086 | Return from subprocedure |
| RET | FAR | 11001011 | 8086 | Return from subprocedure |
| RET | imm FAR | 11001010 | 8086 | Return from subprocedure |
| RDPMC | 0000111100110011 | PentiumPro | Read Performance Monitor Counter | |
| ROL | Reg,1 | 1101000woo000mmm | 8086 | Rotate Left through Carry - Wrap bits around |
| Mem,1 | 1101000woo000mmm | 8086 | Rotate Left through Carry - Wrap bits around | |
| Reg,CL | 1101001woo000mmm | 8086 | Rotate Left through Carry - Wrap bits around | |
| Mem,CL | 1101001woo000mmm | 8086 | Rotate Left through Carry - Wrap bits around | |
| Reg,Imm8 | 1100000woo000mmm | 80186 | Rotate Left through Carry - Wrap bits around | |
| Mem,Imm8 | 1100000woo000mmm | 80186 | Rotate Left through Carry - Wrap bits around | |
| ROR | Reg,1 | 1101000woo001mmm | 8086 | Rotate Right through Carry - Wrap bits around |
| Mem,1 | 1101000woo001mmm | 8086 | Rotate Right through Carry - Wrap bits around | |
| Reg,CL | 1101001woo001mmm | 8086 | Rotate Right through Carry - Wrap bits around | |
| Mem,CL | 1101001woo001mmm | 8086 | Rotate Right through Carry - Wrap bits around | |
| Reg,Imm8 | 1100000woo001mmm | 80186 | Rotate Right through Carry - Wrap bits around | |
| Mem,Imm8 | 1100000woo001mmm | 80186 | Rotate Right through Carry - Wrap bits around | |
| RSM | 0000111110101010 | Pentium | Return from System Management mode | |
| SALC | 11010110 | Pentium Pro | Set AL on Carry | |
| SAHF | 10011110 | 8086 | Load Flags into AH Register | |
| SAL | Reg,1 | 1101000woo100mmm | 8086 | Shift Arithmetic Left |
| Mem,1 | 1101000woo100mmm | 8086 | Shift Arithmetic Left | |
| Reg,CL | 1101001woo100mmm | 8086 | Shift Arithmetic Left | |
| Mem,CL | 1101001woo100mmm | 8086 | Shift Arithmetic Left | |
| Reg,Imm8 | 1100000woo100mmm | 80186 | Shift Arithmetic Left | |
| Mem,Imm8 | 1100000woo100mmm | 80186 | Shift Arithmetic Left | |
| SAR | Reg,1 | 1101000woo111mmm | 8086 | Shift Arithmetic Right |
| Mem,1 | 1101000woo111mmm | 8086 | Shift Arithmetic Right | |
| Reg,CL | 1101001woo111mmm | 8086 | Shift Arithmetic Right | |
| Mem,CL | 1101001woo111mmm | 8086 | Shift Arithmetic Right | |
| Reg,Imm8 | 1100000woo111mmm | 80186 | Shift Arithmetic Right | |
| Mem,Imm8 | 1100000woo111mmm | 80186 | Shift Arithmetic Right | |
| SETcc | Reg8 | 000011111001ccccoo000mmm | 80386 | Set Byte on Condition Code |
| Mem8 | 000011111001ccccoo000mmm | 80386 | Set Byte on Condition Code | |
| SHL | Reg,1 | 1101000woo100mmm | 8086 | Shift Logic Left |
| Mem,1 | 1101000woo100mmm | 8086 | Shift Logic Left | |
| Reg,CL | 1101001woo100mmm | 8086 | Shift Logic Left | |
| Mem,CL | 1101001woo100mmm | 8086 | Shift Logic Left | |
| Reg,Imm8 | 1100000woo100mmm | 80186 | Shift Logic Left | |
| Mem,Imm8 | 1100000woo100mmm | 80186 | Shift Logic Left | |
| SHR | Reg,1 | 1101000woo101mmm | 8086 | Shift Logic Right |
| Mem,1 | 1101000woo101mmm | 8086 | Shift Logic Right | |
| Reg,CL | 1101001woo101mmm | 8086 | Shift Logic Right | |
| Mem,CL | 1101001woo101mmm | 8086 | Shift Logic Right | |
| Reg,Imm8 | 1100000woo101mmm | 80186 | Shift Logic Right | |
| Mem,Imm8 | 1100000woo101mmm | 80186 | Shift Logic Right | |
| SBB | Reg,Reg | 0001101woorrrmmm | 8086 | Substract Integers with Borrow |
| Mem,Reg | 0001100woorrrmmm | 8086 | Substract Integers with Borrow | |
| Reg,Mem | 0001101woorrrmmm | 8086 | Substract Integers with Borrow | |
| Acc,Imm | 0001110w | 8086 | Substract Integers with Borrow | |
| Reg,Imm8 | 1000001woo011mmm | 8086 | Substract Integers with Borrow | |
| Mem,Imm8 | 1000001woo011mmm | 8086 | Substract Integers with Borrow | |
| Reg,Imm | 1000000woo011mmm | 8086 | Substract Integers with Borrow | |
| Mem,Imm | 1000000woo011mmm | 8086 | Substract Integers with Borrow | |
| SCASB | 10101110 | 8086 | Compare Byte | |
| SCASW | 10101111 | 8086 | Compare Word | |
| SCASD | 10101111 | 80386 | Compare Doubleword | |
| SGDT | Mem64 | 0000111100000001oo000mmm | 80286 | Store Global Descriptor Table |
| SHLD | RegWord,RegWord,Imm8 | 0000111110100100oorrrmmm | 80386 | Double Precision Shift Left |
| MemWord,RegWord,Imm8 | 0000111110100100oorrrmmm | 80386 | Double Precision Shift Left | |
| RegWord,RegWord,CL | 0000111110100101oorrrmmm | 80386 | Double Precision Shift Left | |
| MemWord,RegWord,CL | 0000111110100101oorrrmmm | 80386 | Double Precision Shift Left | |
| SHRD | RegWord,RegWord,Imm8 | 0000111110101100oorrrmmm | 80386 | Double Precision Shift Right |
| MemWord,RegWord,Imm8 | 0000111110101100oorrrmmm | 80386 | Double Precision Shift Right | |
| RegWord,RegWord,CL | 0000111110101101oorrrmmm | 80386 | Double Precision Shift Right | |
| MemWord,RegWord,CL | 0000111110101101oorrrmmm | 80386 | Double Precision Shift Right | |
| SIDT | Mem64 | 0000111100000001oo001mmm | 80286 | Store Interrupt Descriptor Table |
| SLDT | Reg16 | 0000111100000000oo000mmm | 80286 | Store Local Descriptor Table Register (LDTR) |
| Mem16 | 0000111100000000oo000mmm | 80286 | Store Local Descriptor Table Register (LDTR) | |
| SMSW | Reg16 | 0000111100000001oo100mmm | 80286 | Store Machine Status Word |
| Mem16 | 0000111100000001oo100mmm | 80286 | Store Machine Status Word | |
| STC | 11111001 | 8086 | Set Carry Flag(CF) | |
| STD | 11111101 | 8086 | Set Direction Flag(DF) | |
| STI | 11111011 | 8086 | Set Interrupt Flag(IF) | |
| STOSB | 10101010 | 8086 | Store String Data Byte | |
| STOSW | 10101011 | 8086 | Store String Data Word | |
| STOSD | 10101011 | 80386 | Store String Data DoubleWord | |
| STR | Reg16 | 0000111100000000oo001mmm | 80286 | Store Task Register |
| Mem16 | 0000111100000000oo001mmm | 80286 | Store Task Register | |
| SUB | Reg,Reg | 0010101woorrrmmm | 8086 | Subtract |
| Mem,Reg | 0010100woorrrmmm | 8086 | Subtract | |
| Reg,Mem | 0010101woorrrmmm | 8086 | Subtract | |
| Acc,Imm | 0010110w | 8086 | Subtract | |
| Reg,Imm8 | 1000001woo101mmm | 8086 | Subtract | |
| Mem,Imm8 | 1000001woo101mmm | 8086 | Subtract | |
| Reg,Imm | 1000000woo101mmm | 8086 | Subtract | |
| Mem,Imm | 1000000woo101mmm | 8086 | Subtract | |
| TEST | Reg,Reg | 1000010woorrrmmm | 8086 | Test Operands |
| Mem,Reg | 1000010woorrrmmm | 8086 | Test Operands | |
| Reg,Mem | 1000010woorrrmmm | 8086 | Test Operands | |
| Acc,Imm | 1010100w | 8086 | Test Operands | |
| Reg,Imm | 1111011woo000mmm | 8086 | Test Operands | |
| Mem,Imm | 1111011woo000mmm | 8086 | Test Operands | |
| VERR | Reg16 | 0000111100000000oo100mmm | 80286 | Verify Read |
| Mem16 | 0000111100000000oo100mmm | 80286 | Verify Read | |
| VERW | Reg16 | 0000111100000000oo101mmm | 80286 | Verify Write |
| Mem16 | 0000111100000000oo101mmm | 80286 | Verify Write | |
| WAIT | 10011011 | 8086 | Wait for FPU | |
| WBINVD | 0000111100001001 | 80486 | Write Back and Invalidate Data Cache | |
| WRMSR | 0000111100110000 | Pentium | Write to Model Specific Register | |
| XADD | Reg,Reg | 000011111100000woorrrmmm | 80486 | Exchange and Add |
| Mem,Reg | 000011111100000woorrrmmm | 80486 | Exchange and Add | |
| XCHG | AccWord,RegWord | 10010rrr | 8086 | Exchange |
| RegWord,AccWord | 10010rrr | 8086 | Exchange | |
| Reg,Reg | 1000011woorrrmmm | 8086 | Exchange | |
| Mem,Reg | 1000011woorrrmmm | 8086 | Exchange | |
| Reg,Mem | 1000011woorrrmmm | 8086 | Exchange | |
| XLAT | 11010111 | 8086 | Translate | |
| XOR | Reg,Reg | 0011001woorrrmmm | 8086 | Exclusive-OR |
| Mem,Reg | 0011000woorrrmmm | 8086 | Exclusive-OR | |
| Reg,Mem | 0011001woorrrmmm | 8086 | Exclusive-OR | |
| Acc,Imm | 0011010w | 8086 | Exclusive-OR | |
| Reg,Imm8 | 1000001woo110mmm | 8086 | Exclusive-OR | |
| Mem,Imm8 | 1000001woo110mmm | 8086 | Exclusive-OR | |
| Reg,Imm | 1000000woo110mmm | 8086 | Exclusive-OR | |
| Mem,Imm | 1000000woo110mmm | 8086 | Exclusive-OR | |
| CALL | MemFar | 11111111oo011mmm | 8086 | Call a Procedure |
| Near | 11101000 | 8086 | Call a Procedure | |
| Far | 10011010 | 8086 | Call a Procedure | |
| RegWord | 11111111oo010mmm | 8086 | Call a Procedure | |
| MemNear | 11111111oo010mmm | 8086 | Call a Procedure | |
| Jcc | Short | 0111cccc | 8086 | Jump on Some Condition Code |
| Near | 000011111000cccc | 80386 | Jump on Some Condition Code | |
| JCXZ | Short | 11100011 | 8086 | |
| JCXE | Short | 11100011 | 8086 | |
| JECXZ | Short | 11100011 | 8086 | |
| JECXE | Short | 11100011 | 8086 | |
| JMP | MemFar | 11111111oo101mmm | 8086 | |
| Short | 11101011 | 8086 | ||
| Near | 11101001 | 8086 | ||
| Far | 11101010 | 8086 | ||
| RegWord | 11111111oo100mmm | 8086 | ||
| MemNear | 11111111oo100mmm | 8086 | ||
| LOOP | Short | 11100010 | 8086 | Loop Control While ECX Counter Not Zero |
| LOOPZ | Short | 11100001 | 8086 | Loop while Zero |
| LOOPE | Short | 11100001 | 8086 | Loop while Equal |
| LOOPNZ | Short | 11100000 | 8086 | Loop while Not Zero |
| LOOPNE | Short | 11100000 | 8086 | Loop while Not Equal |
| LOCK | 11110000 | 8086 | Assert Lock# Signal Prefix | |
| LOCK: | 11110000 | 8086 | Assert Lock# Signal Prefix | |
| REP | 11110011 | 8086 | Repeat Following String Operation | |
| REPE | 11110011 | 8086 | Repeat while Equal | |
| REPZ | 11110011 | 8086 | Repeat while Zero | |
| REPNE | 11110010 | 8086 | Repeat while Not Equal | |
| REPNZ | 11110010 | 8086 | Repeat while Not Zero | |
| CS: | 00101110 | 8086 | CS segment override prefix | |
| DS: | 00111110 | 8086 | DS segment override prefix | |
| ES: | 00100110 | 8086 | ES segment override prefix | |
| FS: | 01100100 | 80386 | FS segment override prefix | |
| GS: | 01100101 | 80386 | GS segment override prefix | |
| SS: | 00110110 | 8086 | SS segment override prefix |
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