From 90935f608d0f6ea4bfa3dbd999b2e27063195e30 Mon Sep 17 00:00:00 2001 From: Reid Spencer Date: Thu, 18 Jan 2007 02:12:10 +0000 Subject: Add an inline helper function that masks a GenericValue to a specified bit width. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@33325 91177308-0d34-0410-b5e6-96231b3b80d8 --- lib/ExecutionEngine/Interpreter/Interpreter.h | 12 ++++++++++++ 1 file changed, 12 insertions(+) (limited to 'lib/ExecutionEngine/Interpreter') diff --git a/lib/ExecutionEngine/Interpreter/Interpreter.h b/lib/ExecutionEngine/Interpreter/Interpreter.h index c62249b..3007b0a 100644 --- a/lib/ExecutionEngine/Interpreter/Interpreter.h +++ b/lib/ExecutionEngine/Interpreter/Interpreter.h @@ -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 -- cgit v1.1