1 files changed, 97 insertions, 0 deletions
diff --git a/deps/v8/src/objects/oddball.h b/deps/v8/src/objects/oddball.h
new file mode 100644
index 0000000000..8f6adf9743
--- /dev/null
+++ b/deps/v8/src/objects/oddball.h
@@ -0,0 +1,97 @@
+// Copyright 2018 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef V8_OBJECTS_ODDBALL_H_
+#define V8_OBJECTS_ODDBALL_H_
+
+#include "src/objects/heap-object.h"
+
+// Has to be the last include (doesn't have include guards):
+#include "src/objects/object-macros.h"
+
+namespace v8 {
+namespace internal {
+
+// The Oddball describes objects null, undefined, true, and false.
+class Oddball : public HeapObject {
+ public:
+  // [to_number_raw]: Cached raw to_number computed at startup.
+  inline double to_number_raw() const;
+  inline void set_to_number_raw(double value);
+  inline void set_to_number_raw_as_bits(uint64_t bits);
+
+  // [to_string]: Cached to_string computed at startup.
+  DECL_ACCESSORS(to_string, String)
+
+  // [to_number]: Cached to_number computed at startup.
+  DECL_ACCESSORS(to_number, Object)
+
+  // [typeof]: Cached type_of computed at startup.
+  DECL_ACCESSORS(type_of, String)
+
+  inline byte kind() const;
+  inline void set_kind(byte kind);
+
+  // ES6 section 7.1.3 ToNumber for Boolean, Null, Undefined.
+  V8_WARN_UNUSED_RESULT static inline Handle<Object> ToNumber(
+      Isolate* isolate, Handle<Oddball> input);
+
+  DECL_CAST(Oddball)
+
+  // Dispatched behavior.
+  DECL_VERIFIER(Oddball)
+
+  // Initialize the fields.
+  static void Initialize(Isolate* isolate, Handle<Oddball> oddball,
+                         const char* to_string, Handle<Object> to_number,
+                         const char* type_of, byte kind);
+
+  // Layout description.
+#define ODDBALL_FIELDS(V)                  \
+  V(kToNumberRawOffset, kDoubleSize)       \
+  /* Tagged fields. */                     \
+  V(kTaggedFieldsStartOffset, 0)           \
+  V(kToStringOffset, kTaggedSize)          \
+  V(kToNumberOffset, kTaggedSize)          \
+  V(kTypeOfOffset, kTaggedSize)            \
+  V(kTaggedFieldsEndOffset, 0)             \
+  /* Raw data but still encoded as Smi. */ \
+  V(kKindOffset, kTaggedSize)              \
+  /* Total size. */                        \
+  V(kSize, 0)
+
+  DEFINE_FIELD_OFFSET_CONSTANTS(HeapObject::kHeaderSize, ODDBALL_FIELDS)
+#undef ODDBALL_FIELDS
+
+  static const byte kFalse = 0;
+  static const byte kTrue = 1;
+  static const byte kNotBooleanMask = static_cast<byte>(~1);
+  static const byte kTheHole = 2;
+  static const byte kNull = 3;
+  static const byte kArgumentsMarker = 4;
+  static const byte kUndefined = 5;
+  static const byte kUninitialized = 6;
+  static const byte kOther = 7;
+  static const byte kException = 8;
+  static const byte kOptimizedOut = 9;
+  static const byte kStaleRegister = 10;
+  static const byte kSelfReferenceMarker = 10;
+
+  typedef FixedBodyDescriptor<kTaggedFieldsStartOffset, kTaggedFieldsEndOffset,
+                              kSize>
+      BodyDescriptor;
+
+  STATIC_ASSERT(kKindOffset == Internals::kOddballKindOffset);
+  STATIC_ASSERT(kNull == Internals::kNullOddballKind);
+  STATIC_ASSERT(kUndefined == Internals::kUndefinedOddballKind);
+
+  OBJECT_CONSTRUCTORS(Oddball, HeapObject);
+};
+
+}  // namespace internal
+}  // namespace v8
+
+#include "src/objects/object-macros-undef.h"
+
+#endif  // V8_OBJECTS_ODDBALL_H_