20171002-evm-implementation-references.md

layout	title	date
post	EVM implementation references	2017-10-02 17:11

• Determines which opcodes are valid in each epoch, and also has a 'read-only' mode for byzantium:
  • https://github.com/ethereum/go-ethereum/blob/master/core/vm/interpreter.go
• Just objects with opcodes:
  • https://github.com/ethereum/go-ethereum/blob/master/core/vm/opcodes.go
• Gas metering:
  • https://github.com/ethereum/go-ethereum/blob/master/core/vm/gas_table.go
• Has implementations of the opcodes:
  • https://github.com/ethereum/go-ethereum/blob/master/core/vm/jump_table.go#L85
• Brings it all together?
  • https://github.com/ethereum/go-ethereum/blob/master/core/vm/evm.go
• Impls of precompiles: https://github.com/ethereum/go-ethereum/blob/master/core/vm/contracts.go

Parity

https://github.com/paritytech/parity/blob/d365281cce919edc42340c97ce212f49d9447d2d/ethcore/evm/src/instructions.rs#L169

Instruction format in parity: InstructionInfo { name: name, args: args, //how many it takes ret: ret, // how many it returns tier: tier // gas cost tier }