feat(core): implement EIP-7939: CLZ opcode #31989

[gzliudan]

Proposed changes

implement EIP-7939

Ref: ethereum#31989

Types of changes

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• Bugfix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation Update (if none of the other choices apply)
• Regular KTLO or any of the maintaince work. e.g code style
• CICD Improvement

Impacted Components

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• Consensus
• Account
• Network
• Geth
• Smart Contract
• External components
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Checklist

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• This PR has sufficient test coverage (unit/integration test) OR I have provided reason in the PR description for not having test coverage
• Provide an end-to-end test plan in the PR description on how to manually test it on the devnet/testnet.
• Tested the backwards compatibility.
• Tested with XDC nodes running this version co-exist with those running the previous version.
• Relevant documentation has been updated as part of this PR
• N/A

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[Copilot]

Pull request overview

This PR implements EIP-7939, which adds a new CLZ (Count Leading Zeros) opcode to the EVM. The CLZ opcode counts the number of leading zero bits in a 256-bit value. To support this new opcode, a new Osaka fork is introduced, which builds on top of the Prague fork.

Changes:

• Adds the Osaka fork configuration across all network constants (mainnet, testnet, devnet, local)
• Implements the CLZ opcode (0x1e) that counts leading zero bits in a 256-bit value
• Creates the Osaka instruction set that includes all Prague features plus EIP-7939

Reviewed changes

Copilot reviewed 12 out of 12 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
params/config.go	Adds OsakaBlock field and IsOsaka() method to chain configuration and Rules struct
core/vm/opcodes.go	Defines CLZ opcode constant (0x1e) and adds string mappings
core/vm/eips.go	Implements opCLZ function and enable7939 to activate the opcode
core/vm/jump_table.go	Creates newOsakaInstructionSet() that extends Prague with EIP-7939
core/vm/jump_table_export.go	Updates LookupInstructionSet() to handle Osaka and Verkle forks
core/vm/evm.go	Adds Osaka case to select appropriate instruction set
core/vm/instructions_test.go	Adds comprehensive test cases for CLZ opcode covering edge cases
common/constants.*.go	Initializes OsakaBlock for all networks

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[Copilot]

Pull request overview

Copilot reviewed 12 out of 12 changed files in this pull request and generated 1 comment.

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