EIP-8120

MLOAD8 and CALLDATALOAD8 Opcodes

Adds EVM opcodes for efficient single-byte memory and calldata loads.

Status history

Draft7 Jan 2026

Abstract

This EIP introduces new EVM opcodes that allow loading a single byte from memory or calldata in a single operation, reducing gas cost and bytecode size compared to existing patterns based on MLOAD (0x51) or CALLDATALOAD (0x35) followed by bit shifting.

Created: 7 Jan 2026
Authors: Helkomine
Upgrades: Not listed in any upgrade
Requires: —
Required by: —

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