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| author | Alex Beregszaszi <alex@rtfs.hu> | 2018-03-29 16:56:51 +0800 |
|---|---|---|
| committer | Alex Beregszaszi <alex@rtfs.hu> | 2018-05-01 03:34:43 +0800 |
| commit | 22bfd3da41ae9efa6e68e884f722502ab3adcf50 (patch) | |
| tree | deeac11c204b909258f040318cc8964d7d2dbf1f /libsolidity/codegen/CompilerUtils.cpp | |
| parent | 5cce2e552baf1f7431c99500da74cb929360c3b8 (diff) | |
| download | dexon-solidity-22bfd3da41ae9efa6e68e884f722502ab3adcf50.tar.gz dexon-solidity-22bfd3da41ae9efa6e68e884f722502ab3adcf50.tar.zst dexon-solidity-22bfd3da41ae9efa6e68e884f722502ab3adcf50.zip | |
Use native shift instructions on Constantinople
Diffstat (limited to 'libsolidity/codegen/CompilerUtils.cpp')
| -rw-r--r-- | libsolidity/codegen/CompilerUtils.cpp | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/libsolidity/codegen/CompilerUtils.cpp b/libsolidity/codegen/CompilerUtils.cpp index 4af7d905..46e81d49 100644 --- a/libsolidity/codegen/CompilerUtils.cpp +++ b/libsolidity/codegen/CompilerUtils.cpp @@ -1265,13 +1265,19 @@ void CompilerUtils::cleanHigherOrderBits(IntegerType const& _typeOnStack) void CompilerUtils::leftShiftNumberOnStack(unsigned _bits) { solAssert(_bits < 256, ""); - m_context << (u256(1) << _bits) << Instruction::MUL; + if (m_context.evmVersion().hasBitwiseShifting()) + m_context << _bits << Instruction::SHL; + else + m_context << (u256(1) << _bits) << Instruction::MUL; } void CompilerUtils::rightShiftNumberOnStack(unsigned _bits, bool _isSigned) { solAssert(_bits < 256, ""); - m_context << (u256(1) << _bits) << Instruction::SWAP1 << (_isSigned ? Instruction::SDIV : Instruction::DIV); + if (m_context.evmVersion().hasBitwiseShifting()) + m_context << _bits << (_isSigned ? Instruction::SAR : Instruction::SHR); + else + m_context << (u256(1) << _bits) << Instruction::SWAP1 << (_isSigned ? Instruction::SDIV : Instruction::DIV); } unsigned CompilerUtils::prepareMemoryStore(Type const& _type, bool _padToWords) |