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Add an inline helper function that masks a GenericValue to a specified

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bit width.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@33325 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Reid Spencer 2007-01-18 02:12:10 +00:00
parent 071b9d5d7c
commit 90935f608d
1 changed files with 12 additions and 0 deletions
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12
lib/ExecutionEngine/Interpreter/Interpreter.h
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@ -231,8 +231,20 @@ private: // Helper functions
GenericValue executeCastOperation(Instruction::CastOps opcode, Value *SrcVal,
const Type *Ty, ExecutionContext &SF);
void popStackAndReturnValueToCaller(const Type *RetTy, GenericValue Result);
};
inline void maskToBitWidth(GenericValue& GV, unsigned BitWidth) {
uint64_t BitMask = (1ull << BitWidth) - 1;
if (BitWidth <= 8)
GV.Int8Val &= BitMask;
else if (BitWidth <= 16)
GV.Int16Val &= BitMask;
else if (BitWidth <= 32)
GV.Int32Val &= BitMask;
else
GV.Int64Val &= BitMask;
}
} // End llvm namespace
#endif