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Merge pull request #492 from ethereum/instructions_storage
Move storage instructions implementations to .cpp
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,100 @@ | ||
| // evmone: Fast Ethereum Virtual Machine implementation | ||
| // Copyright 2019 The evmone Authors. | ||
| // SPDX-License-Identifier: Apache-2.0 | ||
|
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| #include "instructions.hpp" | ||
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| namespace evmone::instr::core | ||
| { | ||
| evmc_status_code sload(StackTop stack, ExecutionState& state) noexcept | ||
| { | ||
| auto& x = stack.top(); | ||
| const auto key = intx::be::store<evmc::bytes32>(x); | ||
|
|
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| if (state.rev >= EVMC_BERLIN && | ||
| state.host.access_storage(state.msg->recipient, key) == EVMC_ACCESS_COLD) | ||
| { | ||
| // The warm storage access cost is already applied (from the cost table). | ||
| // Here we need to apply additional cold storage access cost. | ||
| constexpr auto additional_cold_sload_cost = | ||
| instr::cold_sload_cost - instr::warm_storage_read_cost; | ||
| if ((state.gas_left -= additional_cold_sload_cost) < 0) | ||
| return EVMC_OUT_OF_GAS; | ||
| } | ||
|
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| x = intx::be::load<uint256>(state.host.get_storage(state.msg->recipient, key)); | ||
|
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| return EVMC_SUCCESS; | ||
| } | ||
|
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| evmc_status_code sstore(StackTop stack, ExecutionState& state) noexcept | ||
| { | ||
| if (state.in_static_mode()) | ||
| return EVMC_STATIC_MODE_VIOLATION; | ||
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| if (state.rev >= EVMC_ISTANBUL && state.gas_left <= 2300) | ||
| return EVMC_OUT_OF_GAS; | ||
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| const auto key = intx::be::store<evmc::bytes32>(stack.pop()); | ||
| const auto value = intx::be::store<evmc::bytes32>(stack.pop()); | ||
|
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| int cost = 0; | ||
| if (state.rev >= EVMC_BERLIN && | ||
| state.host.access_storage(state.msg->recipient, key) == EVMC_ACCESS_COLD) | ||
| cost = instr::cold_sload_cost; | ||
|
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| const auto status = state.host.set_storage(state.msg->recipient, key, value); | ||
|
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| if (state.rev <= EVMC_BYZANTIUM || state.rev == EVMC_PETERSBURG) // legacy | ||
| { | ||
| switch (status) | ||
| { | ||
| case EVMC_STORAGE_ASSIGNED: | ||
| case EVMC_STORAGE_MODIFIED_DELETED: | ||
| case EVMC_STORAGE_ADDED_DELETED: | ||
| case EVMC_STORAGE_MODIFIED_RESTORED: | ||
| case EVMC_STORAGE_MODIFIED: | ||
| case EVMC_STORAGE_DELETED: | ||
| cost = 5000; | ||
| break; | ||
| case EVMC_STORAGE_ADDED: | ||
| case EVMC_STORAGE_DELETED_ADDED: | ||
| case EVMC_STORAGE_DELETED_RESTORED: | ||
| cost = 20000; | ||
| break; | ||
| } | ||
| } | ||
| else // net gas cost metering | ||
| { | ||
| switch (status) | ||
| { | ||
| case EVMC_STORAGE_ASSIGNED: | ||
| case EVMC_STORAGE_DELETED_ADDED: | ||
| case EVMC_STORAGE_DELETED_RESTORED: | ||
| case EVMC_STORAGE_MODIFIED_DELETED: | ||
| case EVMC_STORAGE_ADDED_DELETED: | ||
| case EVMC_STORAGE_MODIFIED_RESTORED: | ||
| if (state.rev >= EVMC_BERLIN) | ||
| cost += instr::warm_storage_read_cost; | ||
| else if (state.rev == EVMC_ISTANBUL) | ||
| cost = 800; | ||
| else | ||
| cost = 200; // Constantinople | ||
| break; | ||
| case EVMC_STORAGE_MODIFIED: | ||
| case EVMC_STORAGE_DELETED: | ||
| if (state.rev >= EVMC_BERLIN) | ||
| cost += 5000 - instr::cold_sload_cost; | ||
| else | ||
| cost = 5000; | ||
| break; | ||
| case EVMC_STORAGE_ADDED: | ||
| cost += 20000; | ||
| break; | ||
| } | ||
| } | ||
| if ((state.gas_left -= cost) < 0) | ||
| return EVMC_OUT_OF_GAS; | ||
| return EVMC_SUCCESS; | ||
| } | ||
| } // namespace evmone::instr::core |