From 2adcd83b89d1eb38c7118861454b528d5812aad0 Mon Sep 17 00:00:00 2001
From: Chris Lattner <sabre@nondot.org>
Date: Fri, 3 May 2002 19:52:30 +0000
Subject: [PATCH] Implement the NOT operator.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@2455 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/ExecutionEngine/Interpreter/Execution.cpp | 28 +++++++++++++++++++
 1 file changed, 28 insertions(+)

diff --git a/lib/ExecutionEngine/Interpreter/Execution.cpp b/lib/ExecutionEngine/Interpreter/Execution.cpp
index 6254293ad7f..b9f8030a468 100644
--- a/lib/ExecutionEngine/Interpreter/Execution.cpp
+++ b/lib/ExecutionEngine/Interpreter/Execution.cpp
@@ -259,6 +259,33 @@ Annotation *GlobalAddress::Create(AnnotationID AID, const Annotable *O, void *){
 }
 
 
+//===----------------------------------------------------------------------===//
+//                      Unary Instruction Implementations
+//===----------------------------------------------------------------------===//
+
+#define IMPLEMENT_UNARY_OPERATOR(OP, TY) \
+   case Type::TY##TyID: Dest.TY##Val = OP Src.TY##Val; break
+
+static void executeNotInst(UnaryOperator *I, ExecutionContext &SF) {
+  const Type *Ty   = I->getOperand(0)->getType();
+  GenericValue Src = getOperandValue(I->getOperand(0), SF);
+  GenericValue Dest;
+  switch (Ty->getPrimitiveID()) {
+    IMPLEMENT_UNARY_OPERATOR(~, UByte);
+    IMPLEMENT_UNARY_OPERATOR(~, SByte);
+    IMPLEMENT_UNARY_OPERATOR(~, UShort);
+    IMPLEMENT_UNARY_OPERATOR(~, Short);
+    IMPLEMENT_UNARY_OPERATOR(~, UInt);
+    IMPLEMENT_UNARY_OPERATOR(~, Int);
+    IMPLEMENT_UNARY_OPERATOR(~, ULong);
+    IMPLEMENT_UNARY_OPERATOR(~, Long);
+    IMPLEMENT_UNARY_OPERATOR(~, Pointer);
+  default:
+    cout << "Unhandled type for Not instruction: " << Ty << "\n";
+  }
+  SetValue(I, Dest, SF);
+}
+
 //===----------------------------------------------------------------------===//
 //                    Binary Instruction Implementations
 //===----------------------------------------------------------------------===//
@@ -1152,6 +1179,7 @@ bool Interpreter::executeInstruction() {
     executeBinaryInst(cast<BinaryOperator>(I), SF);
   } else {
     switch (I->getOpcode()) {
+    case Instruction::Not:     executeNotInst(cast<UnaryOperator>(I),SF); break;
       // Terminators
     case Instruction::Ret:     executeRetInst  (cast<ReturnInst>(I), SF); break;
     case Instruction::Br:      executeBrInst   (cast<BranchInst>(I), SF); break;