Opcode costs are drawn from the Yellow Paper, the Jello Paper, and the geth implementation. This is intended to be an accessible reference, but it is informal and does not address opcode semantics. If you want to be certain of correctness and aware of every edge case, I would suggest using the Jello Paper or a client implementation. If you are looking for an informal reference with more information about opcode semantics, try evm.codes.
For operations with dynamic gas costs, see gas.md.
a, b=>a + bindicates that theADDopcode takes two items off the stack (aandb) and places the sum of these two values on the stack. The leftmost item (a) is the top of the stack.- All stack descriptions elide subsequent items that may be on the stack. It can be assumed that unspecified stack elements do not influence the semantics of an operation, except when a stack overflow would result.
- The maximum stack size is 1024 items, and all stack items are 32 bytes.
a // bindicates flooring division. The result of division by 0 in the EVM is 0.- All arithmetic operations are modulo 2**256.
- Including the designated
INVALIDopcode, the EVM currently implements 141 opcodes, 65 of which are duplicates indicating the number of operands (PUSHn,DUPn,SWAPn,LOGn).
| Hex | Name | Gas | Stack | Mem / Storage | Notes |
|---|---|---|---|---|---|
| top, bottom | |||||
| 00 | STOP | 0 | |||
| 01 | ADD | 3 | a, b => a + b |
(u)int256 addition modulo 2**256 | |
| 02 | MUL | 5 | a, b => a * b |
(u)int256 multiplication modulo 2**256 | |
| 03 | SUB | 3 | a, b => a - b |
(u)int256 addition modulo 2**256 | |
| 04 | DIV | 5 | a, b => a // b |
uint256 division | |
| 05 | SDIV | 5 | a, b => a // b |
int256 division | |
| 06 | MOD | 5 | a, b => a % b |
uint256 modulus | |
| 07 | SMOD | 5 | a, b => a % b |
int256 modulus | |
| 08 | ADDMOD | 8 | a, b, N => (a + b) % N |
(u)int256 addition modulo N | |
| 09 | MULMOD | 8 | a, b, N => (a * b) % N |
(u)int256 multiplication modulo N | |
| 0A | EXP | A1 | a, b => a ** b |
uint256 exponentiation modulo 2**256 | |
| 0B | SIGNEXTEND | 5 | b, x => SIGNEXTEND(x, b) |
sign extend x from (b+1) bytes to 32 bytes |
|
| 0C-0F | invalid | ||||
| 10 | LT | 3 | a, b => a < b |
uint256 less-than | |
| 11 | GT | 3 | a, b => a > b |
uint256 greater-than | |
| 12 | SLT | 3 | a, b => a < b |
int256 less-than | |
| 13 | SGT | 3 | a, b => a > b |
int256 greater-than | |
| 14 | EQ | 3 | a, b => a == b |
(u)int256 equality | |
| 15 | ISZERO | 3 | a => a == 0 |
(u)int256 iszero | |
| 16 | AND | 3 | a, b => a && b |
bitwise AND | |
| 17 | OR | 3 | a, b => a || b |
bitwise OR | |
| 18 | XOR | 3 | a, b => a ^ b |
bitwise XOR | |
| 19 | NOT | 3 | a => ~a |
bitwise NOT | |
| 1A | BYTE | 3 | i, x => (x >> (248 - i * 8)) && 0xFF |
ith byte of (u)int256 x, from the left |
|
| 1B | SHL | 3 | shift, val => val << shift |
shift left | |
| 1C | SHR | 3 | shift, val => val >> shift |
logical shift right | |
| 1D | SAR | 3 | shift, val => val >> shift |
arithmetic shift right | |
| 1E-1F | invalid | ||||
| 20 | SHA3 | A2 | ost, len => keccak256(mem[ost:ost+len]) |
keccak256 | |
| 21-2F | invalid | ||||
| 30 | ADDRESS | 2 | . => address(this) |
address of executing contract | |
| 31 | BALANCE | A5 | addr => addr.balance |
balance, in wei | |
| 32 | ORIGIN | 2 | . => tx.origin |
address that originated the tx | |
| 33 | CALLER | 2 | . => msg.sender |
address of msg sender | |
| 34 | CALLVALUE | 2 | . => msg.value |
msg value, in wei | |
| 35 | CALLDATALOAD | 3 | idx => msg.data[idx:idx+32] |
read word from msg data at index idx |
|
| 36 | CALLDATASIZE | 2 | . => len(msg.data) |
length of msg data, in bytes | |
| 37 | CALLDATACOPY | A3 | dstOst, ost, len => . |
mem[dstOst:dstOst+len] := msg.data[ost:ost+len | copy msg data |
| 38 | CODESIZE | 2 | . => len(this.code) |
length of executing contract's code, in bytes | |
| 39 | CODECOPY | A3 | dstOst, ost, len => . |
mem[dstOst:dstOst+len] := this.code[ost:ost+len] | |
| 3A | GASPRICE | 2 | . => tx.gasprice |
gas price of tx, in wei per unit gas ** | |
| 3B | EXTCODESIZE | A5 | addr => len(addr.code) |
size of code at addr, in bytes | |
| 3C | EXTCODECOPY | A4 | addr, dstOst, ost, len => . |
mem[dstOst:dstOst+len] := addr.code[ost:ost+len] | copy code from addr |
| 3D | RETURNDATASIZE | 2 | . => size |
size of returned data from last external call, in bytes | |
| 3E | RETURNDATACOPY | A3 | dstOst, ost, len => . |
mem[dstOst:dstOst+len] := returndata[ost:ost+len] | copy returned data from last external call |
| 3F | EXTCODEHASH | A5 | addr => hash |
hash = addr.exists ? keccak256(addr.code) : 0 | |
| 40 | BLOCKHASH | 20 | blockNum => blockHash(blockNum) |
||
| 41 | COINBASE | 2 | . => block.coinbase |
address of miner of current block | |
| 42 | TIMESTAMP | 2 | . => block.timestamp |
timestamp of current block | |
| 43 | NUMBER | 2 | . => block.number |
number of current block | |
| 44 | DIFFICULTY | 2 | . => block.difficulty |
difficulty of current block | |
| 45 | GASLIMIT | 2 | . => block.gaslimit |
gas limit of current block | |
| 46 | CHAINID | 2 | . => chain_id |
push current chain id onto stack | |
| 47 | SELFBALANCE | 5 | . => address(this).balance |
balance of executing contract, in wei | |
| 48 | BASEFEE | 2 | . => block.basefee |
base fee of current block | |
| 49-4F | invalid | ||||
| 50 | POP | 2 | _anon => . |
remove item from top of stack and discard it | |
| 51 | MLOAD | 3* | ost => mem[ost:ost+32] |
read word from memory at offset ost |
|
| 52 | MSTORE | 3* | ost, val => . |
mem[ost:ost+32] := val | write a word to memory |
| 53 | MSTORE8 | 3* | ost, val => . |
mem[ost] := val && 0xFF | write a single byte to memory |
| 54 | SLOAD | A6 | key => storage[key] |
read word from storage | |
| 55 | SSTORE | A7 | key, val => . |
storage[key] := val | write word to storage |
| 56 | JUMP | 8 | dst => . |
$pc := dst |
|
| 57 | JUMPI | 10 | dst, condition => . |
$pc := condition ? dst : $pc + 1 |
|
| 58 | PC | 2 | . => $pc |
program counter | |
| 59 | MSIZE | 2 | . => len(mem) |
size of memory in current execution context, in bytes | |
| 5A | GAS | 2 | . => gasRemaining |
||
| 5B | JUMPDEST | 1 | mark valid jump destination | ||
| 5C-5F | invalid | ||||
| 60 | PUSH1 | 3 | . => uint8 |
push 1-byte value onto stack | |
| 61 | PUSH2 | 3 | . => uint16 |
push 2-byte value onto stack | |
| 62 | PUSH3 | 3 | . => uint24 |
push 3-byte value onto stack | |
| 63 | PUSH4 | 3 | . => uint32 |
push 4-byte value onto stack | |
| 64 | PUSH5 | 3 | . => uint40 |
push 5-byte value onto stack | |
| 65 | PUSH6 | 3 | . => uint48 |
push 6-byte value onto stack | |
| 66 | PUSH7 | 3 | . => uint56 |
push 7-byte value onto stack | |
| 67 | PUSH8 | 3 | . => uint64 |
push 8-byte value onto stack | |
| 68 | PUSH9 | 3 | . => uint72 |
push 9-byte value onto stack | |
| 69 | PUSH10 | 3 | . => uint80 |
push 10-byte value onto stack | |
| 6A | PUSH11 | 3 | . => uint88 |
push 11-byte value onto stack | |
| 6B | PUSH12 | 3 | . => uint96 |
push 12-byte value onto stack | |
| 6C | PUSH13 | 3 | . => uint104 |
push 13-byte value onto stack | |
| 6D | PUSH14 | 3 | . => uint112 |
push 14-byte value onto stack | |
| 6E | PUSH15 | 3 | . => uint120 |
push 15-byte value onto stack | |
| 6F | PUSH16 | 3 | . => uint128 |
push 16-byte value onto stack | |
| 70 | PUSH17 | 3 | . => uint136 |
push 17-byte value onto stack | |
| 71 | PUSH18 | 3 | . => uint144 |
push 18-byte value onto stack | |
| 72 | PUSH19 | 3 | . => uint152 |
push 19-byte value onto stack | |
| 73 | PUSH20 | 3 | . => uint160 |
push 20-byte value onto stack | |
| 74 | PUSH21 | 3 | . => uint168 |
push 21-byte value onto stack | |
| 75 | PUSH22 | 3 | . => uint176 |
push 22-byte value onto stack | |
| 76 | PUSH23 | 3 | . => uint184 |
push 23-byte value onto stack | |
| 77 | PUSH24 | 3 | . => uint192 |
push 24-byte value onto stack | |
| 78 | PUSH25 | 3 | . => uint200 |
push 25-byte value onto stack | |
| 79 | PUSH26 | 3 | . => uint208 |
push 26-byte value onto stack | |
| 7A | PUSH27 | 3 | . => uint216 |
push 27-byte value onto stack | |
| 7B | PUSH28 | 3 | . => uint224 |
push 28-byte value onto stack | |
| 7C | PUSH29 | 3 | . => uint232 |
push 29-byte value onto stack | |
| 7D | PUSH30 | 3 | . => uint240 |
push 30-byte value onto stack | |
| 7E | PUSH31 | 3 | . => uint248 |
push 31-byte value onto stack | |
| 7F | PUSH32 | 3 | . => uint256 |
push 32-byte value onto stack | |
| 80 | DUP1 | 3 | a => a, a |
clone 1st value on stack | |
| 81 | DUP2 | 3 | _, a => a, _, a |
clone 2nd value on stack | |
| 82 | DUP3 | 3 | _, _, a => a, _, _, a |
clone 3rd value on stack | |
| 83 | DUP4 | 3 | _, _, _, a => a, _, _, _, a |
clone 4th value on stack | |
| 84 | DUP5 | 3 | ..., a => a, ..., a |
clone 5th value on stack | |
| 85 | DUP6 | 3 | ..., a => a, ..., a |
clone 6th value on stack | |
| 86 | DUP7 | 3 | ..., a => a, ..., a |
clone 7th value on stack | |
| 87 | DUP8 | 3 | ..., a => a, ..., a |
clone 8th value on stack | |
| 88 | DUP9 | 3 | ..., a => a, ..., a |
clone 9th value on stack | |
| 89 | DUP10 | 3 | ..., a => a, ..., a |
clone 10th value on stack | |
| 8A | DUP11 | 3 | ..., a => a, ..., a |
clone 11th value on stack | |
| 8B | DUP12 | 3 | ..., a => a, ..., a |
clone 12th value on stack | |
| 8C | DUP13 | 3 | ..., a => a, ..., a |
clone 13th value on stack | |
| 8D | DUP14 | 3 | ..., a => a, ..., a |
clone 14th value on stack | |
| 8E | DUP15 | 3 | ..., a => a, ..., a |
clone 15th value on stack | |
| 8F | DUP16 | 3 | ..., a => a, ..., a |
clone 16th value on stack | |
| 90 | SWAP1 | 3 | a, b => b, a |
||
| 91 | SWAP2 | 3 | a, _, b => b, _, a |
||
| 92 | SWAP3 | 3 | a, _, _, b => b, _, _, a |
||
| 93 | SWAP4 | 3 | a, _, _, _, b => b, _, _, _, a |
||
| 94 | SWAP5 | 3 | a, ..., b => b, ..., a |
||
| 95 | SWAP6 | 3 | a, ..., b => b, ..., a |
||
| 96 | SWAP7 | 3 | a, ..., b => b, ..., a |
||
| 97 | SWAP8 | 3 | a, ..., b => b, ..., a |
||
| 98 | SWAP9 | 3 | a, ..., b => b, ..., a |
||
| 99 | SWAP10 | 3 | a, ..., b => b, ..., a |
||
| 9A | SWAP11 | 3 | a, ..., b => b, ..., a |
||
| 9B | SWAP12 | 3 | a, ..., b => b, ..., a |
||
| 9C | SWAP13 | 3 | a, ..., b => b, ..., a |
||
| 9D | SWAP14 | 3 | a, ..., b => b, ..., a |
||
| 9E | SWAP15 | 3 | a, ..., b => b, ..., a |
||
| 9F | SWAP16 | 3 | a, ..., b => b, ..., a |
||
| A0 | LOG0 | A8 | ost, len => . |
LOG0(memory[ost:ost+len]) | |
| A1 | LOG1 | A8 | ost, len, topic0 => . |
LOG1(memory[ost:ost+len], topic0) | |
| A2 | LOG2 | A8 | ost, len, topic0, topic1 => . |
LOG1(memory[ost:ost+len], topic0, topic1) | |
| A3 | LOG3 | A8 | ost, len, topic0, topic1, topic2 => . |
LOG1(memory[ost:ost+len], topic0, topic1, topic2) | |
| A4 | LOG4 | A8 | ost, len, topic0, topic1, topic2, topic3 => . |
LOG1(memory[ost:ost+len], topic0, topic1, topic2, topic3) | |
| A5-EF | invalid | ||||
| F0 | CREATE | A9 | val, ost, len => addr |
addr = keccak256(rlp_encode([address(this), this.nonce])) | |
| F1 | CALL | AA | gas, addr, val, argOst, argLen, retOst, retLen => success |
mem[retOst:retOst+retLen] := returndata | |
| F2 | CALLCODE | AA | gas, addr, val, argOst, argLen, retOst, retLen => success |
mem[retOst:retOst+retLen] = returndata | same as DELEGATECALL, but does not propagate original msg.sender and msg.value |
| F3 | RETURN | 0* | ost, len => . |
return mem[ost:ost+len] | |
| F4 | DELEGATECALL | AA | gas, addr, argOst, argLen, retOst, retLen=> success |
mem[retOst:retOst+retLen] := returndata | |
| F5 | CREATE2 | A9 | val, ost, len, salt => addr |
addr = keccak256(0xff ++ address(this) ++ salt ++ keccak256(mem[ost:ost+len]))[12:] | |
| F6-F9 | invalid | ||||
| FA | STATICCALL | AA | gas, addr, argOst, argLen, retOst, retLen => success |
mem[retOst:retOst+retLen] := returndata | |
| FB-FC | invalid | ||||
| FD | REVERT | 0* | ost, len => . |
revert(mem[ost:ost+len]) | |
| FE | INVALID | AF | designated invalid opcode - EIP-141 | ||
| FF | SELFDESTRUCT | AB | addr => . |