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Merged
rodrigogribeiro merged 5 commits into from
Jun 9, 2026
Merged

Add std/opcodes #405

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f472f00
Add std/opcodes file
axic May 22, 2026
86fd270
Add gen-std-opcodes.py to generate std/opcodes.solc
claude May 22, 2026
b23fa6d
gen-std-opcodes: rename return wrapper to return_
claude Jun 3, 2026
80787ec
Rename to return_
axic May 22, 2026
fd0fa8a
Add compilation test for std/opcodes wrappers
claude Jun 9, 2026
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161 changes: 161 additions & 0 deletions scripts/gen-std-opcodes.py
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Original file line number Diff line number Diff line change
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#!/usr/bin/env python3
"""Generate std/opcodes.solc from a declarative list of EVM opcodes."""

import os
from string import ascii_lowercase

opcodes = [
# 0x00-0x0b: stop & arithmetic
{"name": "stop", "inputs": 0, "output": 0},
{"name": "add", "inputs": 2, "output": 1},
{"name": "mul", "inputs": 2, "output": 1},
{"name": "sub", "inputs": 2, "output": 1},
{"name": "div", "inputs": 2, "output": 1},
{"name": "sdiv", "inputs": 2, "output": 1},
{"name": "mod", "inputs": 2, "output": 1},
{"name": "smod", "inputs": 2, "output": 1},
{"name": "addmod", "inputs": 3, "output": 1},
{"name": "mulmod", "inputs": 3, "output": 1},
{"name": "exp", "inputs": 2, "output": 1},
{"name": "signextend", "inputs": 2, "output": 1},
# 0x10-0x1d: comparison & bitwise
{"name": "lt", "inputs": 2, "output": 1},
{"name": "gt", "inputs": 2, "output": 1},
{"name": "slt", "inputs": 2, "output": 1},
{"name": "sgt", "inputs": 2, "output": 1},
{"name": "eq", "inputs": 2, "output": 1},
{"name": "iszero", "inputs": 1, "output": 1},
{"name": "and", "inputs": 2, "output": 1},
{"name": "or", "inputs": 2, "output": 1},
{"name": "xor", "inputs": 2, "output": 1},
{"name": "not", "inputs": 1, "output": 1},
{"name": "byte", "inputs": 2, "output": 1},
{"name": "shl", "inputs": 2, "output": 1},
{"name": "shr", "inputs": 2, "output": 1},
{"name": "sar", "inputs": 2, "output": 1},
# 0x20: keccak
{"name": "keccak256", "inputs": 2, "output": 1},
# 0x30-0x3f: environment
{"name": "address", "inputs": 0, "output": 1},
{"name": "balance", "inputs": 1, "output": 1},
{"name": "origin", "inputs": 0, "output": 1},
{"name": "caller", "inputs": 0, "output": 1},
{"name": "callvalue", "inputs": 0, "output": 1},
{"name": "calldataload", "inputs": 1, "output": 1},
{"name": "calldatasize", "inputs": 0, "output": 1},
{"name": "calldatacopy", "inputs": 3, "output": 0},
{"name": "codesize", "inputs": 0, "output": 1},
{"name": "codecopy", "inputs": 3, "output": 0},
{"name": "gasprice", "inputs": 0, "output": 1},
{"name": "extcodesize", "inputs": 1, "output": 1},
{"name": "extcodecopy", "inputs": 4, "output": 0},
{"name": "returndatasize", "inputs": 0, "output": 1},
{"name": "returndatacopy", "inputs": 3, "output": 0},
{"name": "extcodehash", "inputs": 1, "output": 1},
# 0x40-0x4a: block information
{"name": "blockhash", "inputs": 1, "output": 1},
{"name": "coinbase", "inputs": 0, "output": 1},
{"name": "timestamp", "inputs": 0, "output": 1},
{"name": "number", "inputs": 0, "output": 1},
{"name": "prevrandao", "inputs": 0, "output": 1},
{"name": "gaslimit", "inputs": 0, "output": 1},
{"name": "chainid", "inputs": 0, "output": 1},
{"name": "selfbalance", "inputs": 0, "output": 1},
{"name": "basefee", "inputs": 0, "output": 1},
{"name": "blobhash", "inputs": 1, "output": 1},
{"name": "blobbasefee", "inputs": 0, "output": 1},
# 0x50-0x5e: stack, memory, storage (jump/jumpi/pc/jumpdest are not Yul builtins)
{"name": "pop", "inputs": 1, "output": 0},
{"name": "mload", "inputs": 1, "output": 1},
{"name": "mstore", "inputs": 2, "output": 0},
{"name": "mstore8", "inputs": 2, "output": 0},
{"name": "sload", "inputs": 1, "output": 1},
{"name": "sstore", "inputs": 2, "output": 0},
{"name": "msize", "inputs": 0, "output": 1},
{"name": "gas", "inputs": 0, "output": 1},
{"name": "tload", "inputs": 1, "output": 1},
{"name": "tstore", "inputs": 2, "output": 0},
{"name": "mcopy", "inputs": 3, "output": 0},
# 0xa0-0xa4: logging
{"name": "log0", "inputs": 2, "output": 0},
{"name": "log1", "inputs": 3, "output": 0},
{"name": "log2", "inputs": 4, "output": 0},
{"name": "log3", "inputs": 5, "output": 0},
{"name": "log4", "inputs": 6, "output": 0},
# 0xf0-0xff: system
{"name": "create", "inputs": 3, "output": 1},
{"name": "call", "inputs": 7, "output": 1},
{"name": "callcode", "inputs": 7, "output": 1},
{"name": "return", "inputs": 2, "output": 0},
{"name": "delegatecall", "inputs": 6, "output": 1},
{"name": "create2", "inputs": 4, "output": 1},
{"name": "staticcall", "inputs": 6, "output": 1},
{"name": "revert", "inputs": 2, "output": 0},
{"name": "invalid", "inputs": 0, "output": 0},
{"name": "selfdestruct", "inputs": 1, "output": 0},
]


# Opcodes whose names clash with solcore keywords get a trailing underscore
# in the wrapper function name, while the inner assembly call still uses the
# real EVM mnemonic.
RESERVED_NAMES = {"return": "return_"}


def wrapper_name(op):
return RESERVED_NAMES.get(op["name"], op["name"])


def arg_names(n):
return [ascii_lowercase[i] for i in range(n)]


def gen_export(ops):
lines = ["export {"]
for i, op in enumerate(ops):
sep = "," if i < len(ops) - 1 else ""
lines.append(f" {wrapper_name(op)}{sep}")
lines.append("};")
return "\n".join(lines)


def gen_function(op):
name = op["name"]
fname = wrapper_name(op)
args = arg_names(op["inputs"])
params = ", ".join(f"{a}: word" for a in args)
call_args = ", ".join(args)
ret_type = "word" if op["output"] == 1 else "()"

lines = [f"function {fname}({params}) -> {ret_type} {{"]
if op["output"] == 1:
lines.append(" let res;")
lines.append(" assembly {")
lines.append(f" res := {name}({call_args})")
lines.append(" }")
lines.append(" return res;")
else:
lines.append(" assembly {")
lines.append(f" {name}({call_args})")
lines.append(" }")
lines.append("}")
return "\n".join(lines)


def render(ops):
parts = [gen_export(ops)]
for op in ops:
parts.append("")
parts.append(gen_function(op))
return "\n".join(parts) + "\n"


def main():
script_dir = os.path.dirname(os.path.abspath(__file__))
out_path = os.path.join(script_dir, os.pardir, "std", "opcodes.solc")
with open(out_path, "w") as f:
f.write(render(opcodes))


if __name__ == "__main__":
main()
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