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Use shift helper

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This commit is contained in:
Alex Beregszaszi 2016-11-21 12:23:51 +00:00
parent 0494fa98c0
commit c7ae042114
2 changed files with 8 additions and 8 deletions
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12
libsolidity/codegen/CompilerUtils.cpp
View File

@ -371,10 +371,10 @@ void CompilerUtils::combineExternalFunctionType(bool _leftAligned)
m_context << u256(0xffffffffUL) << Instruction::AND << Instruction::SWAP1; m_context << u256(0xffffffffUL) << Instruction::AND << Instruction::SWAP1;
if (!_leftAligned) if (!_leftAligned)
m_context << ((u256(1) << 160) - 1) << Instruction::AND; m_context << ((u256(1) << 160) - 1) << Instruction::AND;
m_context << (u256(1) << 32) << Instruction::MUL; leftShiftNumberOnStack(u256(1) << 32);
m_context << Instruction::OR; m_context << Instruction::OR;
if (_leftAligned) if (_leftAligned)
m_context << (u256(1) << 64) << Instruction::MUL; leftShiftNumberOnStack(u256(1) << 64);
} }
void CompilerUtils::pushCombinedFunctionEntryLabel(Declaration const& _function) void CompilerUtils::pushCombinedFunctionEntryLabel(Declaration const& _function)
@ -425,7 +425,7 @@ void CompilerUtils::convertType(
// conversion from bytes to integer. no need to clean the high bit // conversion from bytes to integer. no need to clean the high bit
// only to shift right because of opposite alignment // only to shift right because of opposite alignment
IntegerType const& targetIntegerType = dynamic_cast<IntegerType const&>(_targetType); IntegerType const& targetIntegerType = dynamic_cast<IntegerType const&>(_targetType);
m_context << (u256(1) << (256 - typeOnStack.numBytes() * 8)) << Instruction::SWAP1 << Instruction::DIV; rightShiftNumberOnStack(u256(1) << (256 - typeOnStack.numBytes() * 8), false);
if (targetIntegerType.numBits() < typeOnStack.numBytes() * 8) if (targetIntegerType.numBits() < typeOnStack.numBytes() * 8)
convertType(IntegerType(typeOnStack.numBytes() * 8), _targetType, _cleanupNeeded); convertType(IntegerType(typeOnStack.numBytes() * 8), _targetType, _cleanupNeeded);
} }
@ -476,7 +476,7 @@ void CompilerUtils::convertType(
if (auto typeOnStack = dynamic_cast<IntegerType const*>(&_typeOnStack)) if (auto typeOnStack = dynamic_cast<IntegerType const*>(&_typeOnStack))
if (targetBytesType.numBytes() * 8 > typeOnStack->numBits()) if (targetBytesType.numBytes() * 8 > typeOnStack->numBits())
cleanHigherOrderBits(*typeOnStack); cleanHigherOrderBits(*typeOnStack);
m_context << (u256(1) << (256 - targetBytesType.numBytes() * 8)) << Instruction::MUL; leftShiftNumberOnStack(u256(1) << (256 - targetBytesType.numBytes() * 8));
} }
else if (targetTypeCategory == Type::Category::Enum) else if (targetTypeCategory == Type::Category::Enum)
{ {
@ -987,9 +987,9 @@ unsigned CompilerUtils::loadFromMemoryHelper(Type const& _type, bool _fromCallda
bool leftAligned = _type.category() == Type::Category::FixedBytes; bool leftAligned = _type.category() == Type::Category::FixedBytes;
// add leading or trailing zeros by dividing/multiplying depending on alignment // add leading or trailing zeros by dividing/multiplying depending on alignment
u256 shiftFactor = u256(1) << ((32 - numBytes) * 8); u256 shiftFactor = u256(1) << ((32 - numBytes) * 8);
m_context << shiftFactor << Instruction::SWAP1 << Instruction::DIV; rightShiftNumberOnStack(shiftFactor, false);
if (leftAligned) if (leftAligned)
m_context << shiftFactor << Instruction::MUL; leftShiftNumberOnStack(shiftFactor);
} }
if (_fromCalldata) if (_fromCalldata)
convertType(_type, _type, true, false, true); convertType(_type, _type, true, false, true);

4
libsolidity/codegen/ExpressionCompiler.cpp
View File

@ -526,7 +526,7 @@ bool ExpressionCompiler::visit(FunctionCall const& _functionCall)
if (m_context.runtimeContext()) if (m_context.runtimeContext())
// We have a runtime context, so we need the creation part. // We have a runtime context, so we need the creation part.
m_context << (u256(1) << 32) << Instruction::SWAP1 << Instruction::DIV; utils().rightShiftNumberOnStack(u256(1) << 32, false);
else else
// Extract the runtime part. // Extract the runtime part.
m_context << ((u256(1) << 32) - 1) << Instruction::AND; m_context << ((u256(1) << 32) - 1) << Instruction::AND;
@ -1269,7 +1269,7 @@ bool ExpressionCompiler::visit(IndexAccess const& _indexAccess)
m_context.appendConditionalInvalid(); m_context.appendConditionalInvalid();
m_context << Instruction::BYTE; m_context << Instruction::BYTE;
m_context << (u256(1) << (256 - 8)) << Instruction::MUL; utils().leftShiftNumberOnStack(u256(1) << (256 - 8));
} }
else if (baseType.category() == Type::Category::TypeType) else if (baseType.category() == Type::Category::TypeType)
{ {