cerc-io/solidity
16
0
Fork 0
mirror of https://github.com/ethereum/solidity synced 2023-10-03 13:03:40 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

Change shiftNumberOnStack to bits

Browse Source
This commit is contained in:
Alex Beregszaszi 2016-11-30 10:03:26 +00:00
parent c7ae042114
commit 8fd1d4167d
3 changed files with 13 additions and 13 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

18
libsolidity/codegen/CompilerUtils.cpp
View File

@ -371,10 +371,10 @@ void CompilerUtils::combineExternalFunctionType(bool _leftAligned)
m_context << u256(0xffffffffUL) << Instruction::AND << Instruction::SWAP1;
if (!_leftAligned)
m_context << ((u256(1) << 160) - 1) << Instruction::AND;
leftShiftNumberOnStack(u256(1) << 32);
leftShiftNumberOnStack(32);
m_context << Instruction::OR;
if (_leftAligned)
leftShiftNumberOnStack(u256(1) << 64);
leftShiftNumberOnStack(64);
}
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
// only to shift right because of opposite alignment
IntegerType const& targetIntegerType = dynamic_cast<IntegerType const&>(_targetType);
rightShiftNumberOnStack(u256(1) << (256 - typeOnStack.numBytes() * 8), false);
rightShiftNumberOnStack(256 - typeOnStack.numBytes() * 8, false);
if (targetIntegerType.numBits() < typeOnStack.numBytes() * 8)
convertType(IntegerType(typeOnStack.numBytes() * 8), _targetType, _cleanupNeeded);
}
@ -476,7 +476,7 @@ void CompilerUtils::convertType(
if (auto typeOnStack = dynamic_cast<IntegerType const*>(&_typeOnStack))
if (targetBytesType.numBytes() * 8 > typeOnStack->numBits())
cleanHigherOrderBits(*typeOnStack);
leftShiftNumberOnStack(u256(1) << (256 - targetBytesType.numBytes() * 8));
leftShiftNumberOnStack(256 - targetBytesType.numBytes() * 8);
}
else if (targetTypeCategory == Type::Category::Enum)
{
@ -986,7 +986,7 @@ unsigned CompilerUtils::loadFromMemoryHelper(Type const& _type, bool _fromCallda
{
bool leftAligned = _type.category() == Type::Category::FixedBytes;
// add leading or trailing zeros by dividing/multiplying depending on alignment
u256 shiftFactor = u256(1) << ((32 - numBytes) * 8);
int shiftFactor = (32 - numBytes) * 8;
rightShiftNumberOnStack(shiftFactor, false);
if (leftAligned)
leftShiftNumberOnStack(shiftFactor);
@ -1007,14 +1007,14 @@ void CompilerUtils::cleanHigherOrderBits(IntegerType const& _typeOnStack)
m_context << ((u256(1) << _typeOnStack.numBits()) - 1) << Instruction::AND;
}
void CompilerUtils::leftShiftNumberOnStack(u256 _shiftFactor)
void CompilerUtils::leftShiftNumberOnStack(unsigned _bits)
{
m_context << _shiftFactor << Instruction::MUL;
m_context << (u256(1) << _bits) << Instruction::MUL;
}
void CompilerUtils::rightShiftNumberOnStack(u256 _shiftFactor, bool _isSigned)
void CompilerUtils::rightShiftNumberOnStack(unsigned _bits, bool _isSigned)
{
m_context << _shiftFactor << Instruction::SWAP1 << (_isSigned ? Instruction::SDIV : Instruction::DIV);
m_context << (u256(1) << _bits) << Instruction::SWAP1 << (_isSigned ? Instruction::SDIV : Instruction::DIV);
}
unsigned CompilerUtils::prepareMemoryStore(Type const& _type, bool _padToWords)

4
libsolidity/codegen/CompilerUtils.h
View File

@ -177,10 +177,10 @@ public:
static unsigned sizeOnStack(std::vector<std::shared_ptr<Type const>> const& _variableTypes);
/// Helper function to shift top value on the stack to the left.
void leftShiftNumberOnStack(u256 _shiftFactor);
void leftShiftNumberOnStack(unsigned _bits);
/// Helper function to shift top value on the stack to the right.
void rightShiftNumberOnStack(u256 _shiftFactor, bool _isSigned = false);
void rightShiftNumberOnStack(unsigned _bits, bool _isSigned = false);
/// Appends code that computes tha Keccak-256 hash of the topmost stack element of 32 byte type.
void computeHashStatic();

4
libsolidity/codegen/ExpressionCompiler.cpp
View File

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