Revert of Remove SIMD.js from V8.

src/bootstrapper.cc

 // Copyright 2014 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.
 
 #include "src/bootstrapper.h"
 
 #include "src/accessors.h"
 #include "src/api-natives.h"
 #include "src/base/ieee754.h"
 #include "src/code-stubs.h"
@@ skipping 3582 matching lines @@
   Handle<JSObject> atomics_object = factory->NewJSObject(cons, TENURED);
   DCHECK(atomics_object->IsJSObject());
   JSObject::AddProperty(global, name, atomics_object, DONT_ENUM);
 
   SimpleInstallFunction(atomics_object, factory->InternalizeUtf8String("load"),
                         Builtins::kAtomicsLoad, 2, true);
   SimpleInstallFunction(atomics_object, factory->InternalizeUtf8String("store"),
                         Builtins::kAtomicsStore, 3, true);
 }
 
+
+void Genesis::InitializeGlobal_harmony_simd() {
+  if (!FLAG_harmony_simd) return;
+
+  Handle<JSGlobalObject> global(
+      JSGlobalObject::cast(native_context()->global_object()));
+  Isolate* isolate = global->GetIsolate();
+  Factory* factory = isolate->factory();
+
+  Handle<String> name = factory->InternalizeUtf8String("SIMD");
+  Handle<JSFunction> cons = factory->NewFunction(name);
+  JSFunction::SetInstancePrototype(
+      cons,
+      Handle<Object>(native_context()->initial_object_prototype(), isolate));
+  cons->shared()->set_instance_class_name(*name);
+  Handle<JSObject> simd_object = factory->NewJSObject(cons, TENURED);
+  DCHECK(simd_object->IsJSObject());
+  JSObject::AddProperty(global, name, simd_object, DONT_ENUM);
+
+// Install SIMD type functions. Set the instance class names since
+// InstallFunction only does this when we install on the JSGlobalObject.
+#define SIMD128_INSTALL_FUNCTION(TYPE, Type, type, lane_count, lane_type) \
+  Handle<JSFunction> type##_function = InstallFunction(                   \
+      simd_object, #Type, JS_VALUE_TYPE, JSValue::kSize,                  \
+      isolate->initial_object_prototype(), Builtins::kIllegal);           \
+  native_context()->set_##type##_function(*type##_function);              \
+  type##_function->shared()->set_instance_class_name(*factory->Type##_string());
+  SIMD128_TYPES(SIMD128_INSTALL_FUNCTION)
+#undef SIMD128_INSTALL_FUNCTION
+}
+
+
 void Genesis::InitializeGlobal_harmony_array_prototype_values() {
   if (!FLAG_harmony_array_prototype_values) return;
   Handle<JSFunction> array_constructor(native_context()->array_function());
   Handle<JSObject> array_prototype(
       JSObject::cast(array_constructor->instance_prototype()));
   Handle<Object> values_iterator =
       JSObject::GetProperty(array_prototype, factory()->iterator_symbol())
           .ToHandleChecked();
   DCHECK(values_iterator->IsJSFunction());
   JSObject::AddProperty(array_prototype, factory()->values_string(),
@@ skipping 456 matching lines @@
   }
 
   return true;
 }
 
 
 bool Genesis::InstallExperimentalNatives() {
   static const char* harmony_tailcalls_natives[] = {nullptr};
   static const char* harmony_sharedarraybuffer_natives[] = {
       "native harmony-atomics.js", NULL};
+  static const char* harmony_simd_natives[] = {"native harmony-simd.js",
+                                               nullptr};
   static const char* harmony_do_expressions_natives[] = {nullptr};
   static const char* harmony_regexp_lookbehind_natives[] = {nullptr};
   static const char* harmony_regexp_named_captures_natives[] = {nullptr};
   static const char* harmony_regexp_property_natives[] = {nullptr};
   static const char* harmony_function_sent_natives[] = {nullptr};
   static const char* harmony_array_prototype_values_natives[] = {nullptr};
 #ifdef V8_I18N_SUPPORT
   static const char* icu_case_mapping_natives[] = {"native icu-case-mapping.js",
                                                    nullptr};
   static const char* datetime_format_to_parts_natives[] = {
@@ skipping 754 matching lines @@
 }
 
 
 // Called when the top-level V8 mutex is destroyed.
 void Bootstrapper::FreeThreadResources() {
   DCHECK(!IsActive());
 }
 
 }  // namespace internal
 }  // namespace v8