Revert of Remove SIMD.js from V8.

src/objects-inl.h

Index: src/objects-inl.h
diff --git a/src/objects-inl.h b/src/objects-inl.h
index 0a785e613daa604b61106d28791913190e78dfba..371bc2af73927d64f717eb49e68a9dd94e5b0cdf 100644
--- a/src/objects-inl.h
+++ b/src/objects-inl.h
@@ -174,6 +174,7 @@
 TYPE_CHECKER(Oddball, ODDBALL_TYPE)
 TYPE_CHECKER(PropertyCell, PROPERTY_CELL_TYPE)
 TYPE_CHECKER(SharedFunctionInfo, SHARED_FUNCTION_INFO_TYPE)
+TYPE_CHECKER(Simd128Value, SIMD128_VALUE_TYPE)
 TYPE_CHECKER(Symbol, SYMBOL_TYPE)
 TYPE_CHECKER(TransitionArray, TRANSITION_ARRAY_TYPE)
 TYPE_CHECKER(WeakCell, WEAK_CELL_TYPE)
@@ -202,6 +203,11 @@
 bool HeapObject::IsExternal() const {
   return map() == GetHeap()->external_map();
 }
+
+#define SIMD128_TYPE_CHECKER(TYPE, Type, type, lane_count, lane_type) \
+  bool HeapObject::Is##Type() const { return map() == GetHeap()->type##_map(); }
+SIMD128_TYPES(SIMD128_TYPE_CHECKER)
+#undef SIMD128_TYPE_CHECKER
 
 #define IS_TYPE_FUNCTION_DEF(type_)                               \
   bool Object::Is##type_() const {                                \
@@ -611,6 +617,9 @@
 CAST_ACCESSOR(AbstractCode)
 CAST_ACCESSOR(ArrayList)
 CAST_ACCESSOR(BoilerplateDescription)
+CAST_ACCESSOR(Bool16x8)
+CAST_ACCESSOR(Bool32x4)
+CAST_ACCESSOR(Bool8x16)
 CAST_ACCESSOR(ByteArray)
 CAST_ACCESSOR(BytecodeArray)
 CAST_ACCESSOR(Cell)
@@ -629,11 +638,15 @@
 CAST_ACCESSOR(FixedArrayBase)
 CAST_ACCESSOR(FixedDoubleArray)
 CAST_ACCESSOR(FixedTypedArrayBase)
+CAST_ACCESSOR(Float32x4)
 CAST_ACCESSOR(Foreign)
 CAST_ACCESSOR(FrameArray)
 CAST_ACCESSOR(GlobalDictionary)
 CAST_ACCESSOR(HandlerTable)
 CAST_ACCESSOR(HeapObject)
+CAST_ACCESSOR(Int16x8)
+CAST_ACCESSOR(Int32x4)
+CAST_ACCESSOR(Int8x16)
 CAST_ACCESSOR(JSArray)
 CAST_ACCESSOR(JSArrayBuffer)
 CAST_ACCESSOR(JSArrayBufferView)
@@ -684,6 +697,7 @@
 CAST_ACCESSOR(SeqString)
 CAST_ACCESSOR(SeqTwoByteString)
 CAST_ACCESSOR(SharedFunctionInfo)
+CAST_ACCESSOR(Simd128Value)
 CAST_ACCESSOR(SlicedString)
 CAST_ACCESSOR(Smi)
 CAST_ACCESSOR(String)
@@ -693,6 +707,9 @@
 CAST_ACCESSOR(Symbol)
 CAST_ACCESSOR(TemplateInfo)
 CAST_ACCESSOR(ThinString)
+CAST_ACCESSOR(Uint16x8)
+CAST_ACCESSOR(Uint32x4)
+CAST_ACCESSOR(Uint8x16)
 CAST_ACCESSOR(UnseededNumberDictionary)
 CAST_ACCESSOR(WeakCell)
 CAST_ACCESSOR(WeakFixedArray)
@@ -1557,6 +1574,110 @@
 int HeapNumber::get_sign() {
   return READ_INT_FIELD(this, kExponentOffset) & kSignMask;
 }
+
+
+bool Simd128Value::Equals(Simd128Value* that) {
+  // TODO(bmeurer): This doesn't match the SIMD.js specification, but it seems
+  // to be consistent with what the CompareICStub does, and what is tested in
+  // the current SIMD.js testsuite.
+  if (this == that) return true;
+#define SIMD128_VALUE(TYPE, Type, type, lane_count, lane_type) \
+  if (this->Is##Type()) {                                      \
+    if (!that->Is##Type()) return false;                       \
+    return Type::cast(this)->Equals(Type::cast(that));         \
+  }
+  SIMD128_TYPES(SIMD128_VALUE)
+#undef SIMD128_VALUE
+  return false;
+}
+
+
+// static
+bool Simd128Value::Equals(Handle<Simd128Value> one, Handle<Simd128Value> two) {
+  return one->Equals(*two);
+}
+
+
+#define SIMD128_VALUE_EQUALS(TYPE, Type, type, lane_count, lane_type) \
+  bool Type::Equals(Type* that) {                                     \
+    for (int lane = 0; lane < lane_count; ++lane) {                   \
+      if (this->get_lane(lane) != that->get_lane(lane)) return false; \
+    }                                                                 \
+    return true;                                                      \
+  }
+SIMD128_TYPES(SIMD128_VALUE_EQUALS)
+#undef SIMD128_VALUE_EQUALS
+
+
+#if defined(V8_TARGET_LITTLE_ENDIAN)
+#define SIMD128_READ_LANE(lane_type, lane_count, field_type, field_size) \
+  lane_type value =                                                      \
+      READ_##field_type##_FIELD(this, kValueOffset + lane * field_size);
+#elif defined(V8_TARGET_BIG_ENDIAN)
+#define SIMD128_READ_LANE(lane_type, lane_count, field_type, field_size) \
+  lane_type value = READ_##field_type##_FIELD(                           \
+      this, kValueOffset + (lane_count - lane - 1) * field_size);
+#else
+#error Unknown byte ordering
+#endif
+
+#if defined(V8_TARGET_LITTLE_ENDIAN)
+#define SIMD128_WRITE_LANE(lane_count, field_type, field_size, value) \
+  WRITE_##field_type##_FIELD(this, kValueOffset + lane * field_size, value);
+#elif defined(V8_TARGET_BIG_ENDIAN)
+#define SIMD128_WRITE_LANE(lane_count, field_type, field_size, value) \
+  WRITE_##field_type##_FIELD(                                         \
+      this, kValueOffset + (lane_count - lane - 1) * field_size, value);
+#else
+#error Unknown byte ordering
+#endif
+
+#define SIMD128_NUMERIC_LANE_FNS(type, lane_type, lane_count, field_type, \
+                                 field_size)                              \
+  lane_type type::get_lane(int lane) const {                              \
+    DCHECK(lane < lane_count && lane >= 0);                               \
+    SIMD128_READ_LANE(lane_type, lane_count, field_type, field_size)      \
+    return value;                                                         \
+  }                                                                       \
+                                                                          \
+  void type::set_lane(int lane, lane_type value) {                        \
+    DCHECK(lane < lane_count && lane >= 0);                               \
+    SIMD128_WRITE_LANE(lane_count, field_type, field_size, value)         \
+  }
+
+SIMD128_NUMERIC_LANE_FNS(Float32x4, float, 4, FLOAT, kFloatSize)
+SIMD128_NUMERIC_LANE_FNS(Int32x4, int32_t, 4, INT32, kInt32Size)
+SIMD128_NUMERIC_LANE_FNS(Uint32x4, uint32_t, 4, UINT32, kInt32Size)
+SIMD128_NUMERIC_LANE_FNS(Int16x8, int16_t, 8, INT16, kShortSize)
+SIMD128_NUMERIC_LANE_FNS(Uint16x8, uint16_t, 8, UINT16, kShortSize)
+SIMD128_NUMERIC_LANE_FNS(Int8x16, int8_t, 16, INT8, kCharSize)
+SIMD128_NUMERIC_LANE_FNS(Uint8x16, uint8_t, 16, UINT8, kCharSize)
+#undef SIMD128_NUMERIC_LANE_FNS
+
+
+#define SIMD128_BOOLEAN_LANE_FNS(type, lane_type, lane_count, field_type, \
+                                 field_size)                              \
+  bool type::get_lane(int lane) const {                                   \
+    DCHECK(lane < lane_count && lane >= 0);                               \
+    SIMD128_READ_LANE(lane_type, lane_count, field_type, field_size)      \
+    DCHECK(value == 0 || value == -1);                                    \
+    return value != 0;                                                    \
+  }                                                                       \
+                                                                          \
+  void type::set_lane(int lane, bool value) {                             \
+    DCHECK(lane < lane_count && lane >= 0);                               \
+    int32_t int_val = value ? -1 : 0;                                     \
+    SIMD128_WRITE_LANE(lane_count, field_type, field_size, int_val)       \
+  }
+
+SIMD128_BOOLEAN_LANE_FNS(Bool32x4, int32_t, 4, INT32, kInt32Size)
+SIMD128_BOOLEAN_LANE_FNS(Bool16x8, int16_t, 8, INT16, kShortSize)
+SIMD128_BOOLEAN_LANE_FNS(Bool8x16, int8_t, 16, INT8, kCharSize)
+#undef SIMD128_BOOLEAN_LANE_FNS
+
+#undef SIMD128_READ_LANE
+#undef SIMD128_WRITE_LANE
+
 
 ACCESSORS(JSReceiver, properties, FixedArray, kPropertiesOffset)
 
@@ -2337,8 +2458,8 @@
   DCHECK(IsHeapObject());
   Isolate* isolate = HeapObject::cast(this)->GetIsolate();
   if (!(IsString() || IsSymbol() || IsJSReceiver() || IsHeapNumber() ||
-        IsUndefined(isolate) || IsTrue(isolate) || IsFalse(isolate) ||
-        IsNull(isolate))) {
+        IsSimd128Value() || IsUndefined(isolate) || IsTrue(isolate) ||
+        IsFalse(isolate) || IsNull(isolate))) {
     FATAL("API call returned invalid object");
   }
 #endif  // DEBUG
@@ -2601,6 +2722,7 @@
     return kDoubleAligned;
   }
   if (IsHeapNumber()) return kDoubleUnaligned;
+  if (IsSimd128Value()) return kSimd128Unaligned;
 #endif  // V8_HOST_ARCH_32_BIT
   return kWordAligned;
 }