Add support for EIP-7939 (CLZ opcode)#400
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sorpaas merged 5 commits intoJan 12, 2026
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sorpaas
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Looks straightforward. Let me know if it's ready.
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Thank you @sorpaas ! I consider it ready 👍 |
librelois
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manuelmauro
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Jan 13, 2026
* feat: ✨ add support for count leading zeros (CLZ) opcode * style: 🎨 fmt * refactor: ♻️ remove redundant check * refactor: 🚨 clippy * refactor: 🚨 more clippy
manuelmauro
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Created `moonbeam-polkadot-stable2603` on `moonbeam-foundation/evm`. Upstream `rust-ethereum/evm` has moved to v1.0; the moonbeam fork stays on the 0.43.x line and there is no new upstream commit to pull. The new branch shares the same tip SHA as stable2512 (`bb9cdde4`) so both moonbeam-only commits — `a656db90` (the EIP-7939 CLZ-opcode cherry-pick of rust-ethereum/evm#400, which was merged upstream only on v1.0) and `bb9cdde4` (the MBF ethereum fork dep pin discovered in Phase 0.5) — are inherited as-is. Tick Phase 1.2 boxes in UPGRADE-stable2603.md and replace the `TBD` placeholder in the EIP-7939 row of `polkadot-sdk-stable2603.md` with the actual commit link.
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Description
Implements the Count Leading Zeros (CLZ) opcode as specified in https://eips.ethereum.org/EIPS/eip-7939.
Changes
CLZopcode (0x1e) toevm-coreclz()function returning leading zero count (256 for zero input)has_eip_7939config flag, enabled starting from Osaka forkG_LOW), matchingMULand consistent with both the EIP-7939 specification andgo-ethereum's implementation.Config::osaka()fork configuration