Expose SIMD.Float32x4 type to Javascript.

src/bootstrapper.cc

Index: src/bootstrapper.cc
diff --git a/src/bootstrapper.cc b/src/bootstrapper.cc
index 867a0da57225e5b28fd51cee14ffcfcb66df48a2..c1c79e893a59590565640c6fe13ac39a4f54e5e6 100644
--- a/src/bootstrapper.cc
+++ b/src/bootstrapper.cc
@@ -1315,6 +1315,27 @@ void Genesis::InitializeGlobal(Handle<GlobalObject> global_object,
   InstallFunction(global, "WeakSet", JS_WEAK_SET_TYPE, JSWeakSet::kSize,
                   isolate->initial_object_prototype(), Builtins::kIllegal);
 
+  {
+    // -- S I M D
+    Handle<String> name = factory->InternalizeUtf8String("SIMD");
+    Handle<JSFunction> cons = factory->NewFunction(name);
+    JSFunction::SetInstancePrototype(
+        cons,
+        Handle<Object>(native_context()->initial_object_prototype(), isolate));
+    cons->SetInstanceClassName(*name);
+    Handle<JSObject> simd_object = factory->NewJSObject(cons, TENURED);
+    DCHECK(simd_object->IsJSObject());
+    JSObject::AddProperty(global, name, simd_object, DONT_ENUM);
+
+    Handle<JSFunction> float32x4_function = InstallFunction(
+        simd_object, "Float32x4", JS_VALUE_TYPE, JSValue::kSize,
+        isolate->initial_object_prototype(), Builtins::kIllegal);
+    // Set the instance class name since InstallFunction only does this when
+    // we install on the GlobalObject.
+    float32x4_function->SetInstanceClassName(*factory->Float32x4_string());
+    native_context()->set_float32x4_function(*float32x4_function);
+  }
+
   {  // --- sloppy arguments map
     // Make sure we can recognize argument objects at runtime.
     // This is done by introducing an anonymous function with
@@ -1816,6 +1837,7 @@ EMPTY_NATIVE_FUNCTIONS_FOR_FEATURE(harmony_spread_arrays)
 EMPTY_NATIVE_FUNCTIONS_FOR_FEATURE(harmony_sharedarraybuffer)
 EMPTY_NATIVE_FUNCTIONS_FOR_FEATURE(harmony_atomics)
 EMPTY_NATIVE_FUNCTIONS_FOR_FEATURE(harmony_new_target)
+EMPTY_NATIVE_FUNCTIONS_FOR_FEATURE(harmony_simd)
 
 
 void Genesis::InstallNativeFunctions_harmony_proxies() {
@@ -1848,6 +1870,7 @@ EMPTY_INITIALIZE_GLOBAL_FOR_FEATURE(harmony_object)
 EMPTY_INITIALIZE_GLOBAL_FOR_FEATURE(harmony_spread_arrays)
 EMPTY_INITIALIZE_GLOBAL_FOR_FEATURE(harmony_atomics)
 EMPTY_INITIALIZE_GLOBAL_FOR_FEATURE(harmony_new_target)
+EMPTY_INITIALIZE_GLOBAL_FOR_FEATURE(harmony_simd)
 
 void Genesis::InitializeGlobal_harmony_regexps() {
   Handle<JSObject> builtins(native_context()->builtins());
@@ -2493,6 +2516,8 @@ bool Genesis::InstallExperimentalNatives() {
   static const char* harmony_atomics_natives[] = {"native harmony-atomics.js",
                                                   nullptr};
   static const char* harmony_new_target_natives[] = {nullptr};
+  static const char* harmony_simd_natives[] = {"native harmony-simd.js",
+                                               nullptr};
 
   for (int i = ExperimentalNatives::GetDebuggerCount();
        i < ExperimentalNatives::GetBuiltinsCount(); i++) {