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| author | Alex Beregszaszi <alex@rtfs.hu> | 2018-09-19 04:25:52 +0800 |
|---|---|---|
| committer | Alex Beregszaszi <alex@rtfs.hu> | 2018-09-26 03:39:35 +0800 |
| commit | 21beba76e2d4d30949da6eddd2473c34c426d047 (patch) | |
| tree | f1ffdb35d5cda42ac6209806af2f39a30ca6251e /libevmasm | |
| parent | 608f36d77b0dc6d908d89fe3a1b8e1626df8391c (diff) | |
| download | dexon-solidity-21beba76e2d4d30949da6eddd2473c34c426d047.tar.gz dexon-solidity-21beba76e2d4d30949da6eddd2473c34c426d047.tar.zst dexon-solidity-21beba76e2d4d30949da6eddd2473c34c426d047.zip | |
Add helpers for the LOG instruction
Diffstat (limited to 'libevmasm')
| -rw-r--r-- | libevmasm/GasMeter.cpp | 3 | ||||
| -rw-r--r-- | libevmasm/Instruction.h | 12 |
2 files changed, 13 insertions, 2 deletions
diff --git a/libevmasm/GasMeter.cpp b/libevmasm/GasMeter.cpp index 3554f809..b525c301 100644 --- a/libevmasm/GasMeter.cpp +++ b/libevmasm/GasMeter.cpp @@ -125,8 +125,7 @@ GasMeter::GasConsumption GasMeter::estimateMax(AssemblyItem const& _item, bool _ case Instruction::LOG3: case Instruction::LOG4: { - unsigned n = unsigned(_item.instruction()) - unsigned(Instruction::LOG0); - gas = GasCosts::logGas + GasCosts::logTopicGas * n; + gas = GasCosts::logGas + GasCosts::logTopicGas * getLogNumber(_item.instruction()); gas += memoryGas(0, -1); if (u256 const* value = classes.knownConstant(m_state->relativeStackElement(-1))) gas += GasCosts::logDataGas * (*value); diff --git a/libevmasm/Instruction.h b/libevmasm/Instruction.h index e2e2b63e..50c1f47d 100644 --- a/libevmasm/Instruction.h +++ b/libevmasm/Instruction.h @@ -218,6 +218,12 @@ inline bool isSwapInstruction(Instruction _inst) return Instruction::SWAP1 <= _inst && _inst <= Instruction::SWAP16; } +/// @returns true if the instruction is a LOG +inline bool isLogInstruction(Instruction _inst) +{ + return Instruction::LOG0 <= _inst && _inst <= Instruction::LOG4; +} + /// @returns the number of PUSH Instruction _inst inline unsigned getPushNumber(Instruction _inst) { @@ -236,6 +242,12 @@ inline unsigned getSwapNumber(Instruction _inst) return (byte)_inst - unsigned(Instruction::SWAP1) + 1; } +/// @returns the number of LOG Instruction _inst +inline unsigned getLogNumber(Instruction _inst) +{ + return (byte)_inst - unsigned(Instruction::LOG0); +} + /// @returns the PUSH<_number> instruction inline Instruction pushInstruction(unsigned _number) { |