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[WIP] EIP-2330 EXTSLOAD #5805

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[WIP] EIP-2330 EXTSLOAD #5805

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38ac703
eip-2330 EXTSLOAD wip
dominicletz Nov 1, 2019
4e38c97
eip-2330 EXTSLOAD wip#2
dominicletz Nov 1, 2019
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1 change: 1 addition & 0 deletions CHANGELOG.md
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Expand Up @@ -2,6 +2,7 @@

## [1.8.0] - Unreleased

- Added: [#XXXX](https://github.com/ethereum/aleth/pull/XXXX) EIP XXXX: EXTSLOAD opcode.
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Suggested change
- Added: [#XXXX](https://github.com/ethereum/aleth/pull/XXXX) EIP XXXX: EXTSLOAD opcode.
- Added: [#5805](https://github.com/ethereum/aleth/pull/5805) EIP 2330: EXTSLOAD opcode.

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Thanks, this is great feedback, I'll make those changes.

Regarding LegacyVM.cpp vs interpreter VM.cpp I would like to understand more about their differences and future. Is there an origin story about them I can read up on?

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Not much of a story - aleth-interpreter is the same code adapted to conform to EVMC API. We keep both for now, because EVMC does not yet support all of the features we need in EVM (like tracing and individual EIP activation)

- Added: [#5699](https://github.com/ethereum/aleth/pull/5699) EIP 2046: Reduced gas cost for static calls made to precompiles.
- Added: [#5752](https://github.com/ethereum/aleth/pull/5752) [#5753](https://github.com/ethereum/aleth/pull/5753) Implement EIP1380 (reduced gas costs for call-to-self).
- Removed: [#5760](https://github.com/ethereum/aleth/pull/5760) Official support for Visual Studio 2015 has been dropped. Compilation with this compiler is expected to stop working after migration to C++14.
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12 changes: 12 additions & 0 deletions libaleth-interpreter/VM.cpp
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Expand Up @@ -1431,6 +1431,18 @@ void VM::interpretCases()
}
NEXT

CASE(EXTSLOAD)
{
ON_OP();
updateIOGas();

auto const address = intx::be::trunc<evmc::address>(m_SP[0]);
auto const key = intx::be::store<evmc_uint256be>(m_SP[1]);
m_SPP[0] =
intx::be::load<intx::uint256>(m_context->host->get_storage(m_context, &address, &key));
}
NEXT

CASE(INVALID)
DEFAULT
{
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2 changes: 1 addition & 1 deletion libaleth-interpreter/VMConfig.h
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Expand Up @@ -231,7 +231,7 @@ namespace eth
&&MSIZE, \
&&GAS, \
&&JUMPDEST, \
&&BEGINDATA, \
&&EXTSLOAD, \
&&BEGINSUB, \
&&INVALID, \
&&INVALID, \
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1 change: 1 addition & 0 deletions libevm/Instruction.h
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Expand Up @@ -82,6 +82,7 @@ enum class Instruction : uint8_t
MSIZE, ///< get the size of active memory
GAS, ///< get the amount of available gas
JUMPDEST, ///< set a potential jump destination
EXTSLOAD, ///< load word from storage of another contract

PUSH1 = 0x60, ///< place 1 byte item on stack
PUSH2, ///< place 2 byte item on stack
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