[llvm-commits] CVS: llvm/lib/ExecutionEngine/Interpreter/Interpreter.h

[Reid Spencer]

Changes in directory llvm/lib/ExecutionEngine/Interpreter:

Interpreter.h updated: 1.80 -> 1.81
---
Log message:

Add an inline helper function that masks a GenericValue to a specified
bit width.


---
Diffs of the changes:  (+12 -0)

 Interpreter.h |   12 ++++++++++++
 1 files changed, 12 insertions(+)


Index: llvm/lib/ExecutionEngine/Interpreter/Interpreter.h
diff -u llvm/lib/ExecutionEngine/Interpreter/Interpreter.h:1.80 llvm/lib/ExecutionEngine/Interpreter/Interpreter.h:1.81
--- llvm/lib/ExecutionEngine/Interpreter/Interpreter.h:1.80	Fri Jan 12 01:05:13 2007
+++ llvm/lib/ExecutionEngine/Interpreter/Interpreter.h	Wed Jan 17 20:12:10 2007
@@ -231,8 +231,20 @@
   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