Add fast case stub for BIT_NOT.

bleeding_edge/src/codegen.h

 // Copyright 2006-2008 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 276 matching lines @@
   InstanceofStub() { }
 
   void Generate(MacroAssembler* masm);
 
  private:
   Major MajorKey() { return Instanceof; }
   int MinorKey() { return 0; }
 };
 
 
-class UnarySubStub : public CodeStub {
+class GenericUnaryOpStub : public CodeStub {
  public:
-  explicit UnarySubStub(bool overwrite)
-      : overwrite_(overwrite) { }
+  GenericUnaryOpStub(Token::Value op, bool overwrite)
+      : op_(op), overwrite_(overwrite) { }
 
  private:
+  Token::Value op_;
   bool overwrite_;
-  Major MajorKey() { return UnarySub; }
-  int MinorKey() { return overwrite_ ? 1 : 0; }
+
+  class OverwriteField: public BitField<int, 0, 1> {};
+  class OpField: public BitField<Token::Value, 1, kMinorBits - 1> {};
+
+  Major MajorKey() { return GenericUnaryOp; }
+  int MinorKey() {
+    return OpField::encode(op_) | OverwriteField::encode(overwrite_);
+  }
+
   void Generate(MacroAssembler* masm);
 
-  const char* GetName() {
-    return overwrite_ ? "UnarySubStub_Overwrite" : "UnarySubStub_Alloc";
-  }
+  const char* GetName();
 };
 
 
 class CompareStub: public CodeStub {
  public:
   CompareStub(Condition cc, bool strict) : cc_(cc), strict_(strict) { }
 
   void Generate(MacroAssembler* masm);
 
  private:
@@ skipping 148 matching lines @@
     PrintF("ArgumentsAccessStub (type %d)\n", type_);
   }
 #endif
 };
 
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_CODEGEN_H_