Add SIMD.Float32x4 functions.

src/api.h

Index: src/api.h
diff --git a/src/api.h b/src/api.h
index 6d7aaeab4adec09d6404310a530c842be86c82fe..f873032ea943a519a3c2ffc6e950873e8c4d79d6 100644
--- a/src/api.h
+++ b/src/api.h
@@ -160,6 +160,7 @@ class RegisteredExtension {
   V(Int32Array, JSTypedArray)                \
   V(Float32Array, JSTypedArray)              \
   V(Float64Array, JSTypedArray)              \
+  V(Float32x4, Float32x4)                    \
   V(DataView, JSDataView)                    \
   V(SharedArrayBuffer, JSArrayBuffer)        \
   V(Name, Name)                              \
@@ -237,6 +238,9 @@ class Utils {
   static inline Local<Float64Array> ToLocalFloat64Array(
       v8::internal::Handle<v8::internal::JSTypedArray> obj);
 
+  static inline Local<Float32x4> ToLocal(
+      v8::internal::Handle<v8::internal::Float32x4> obj);
+
   static inline Local<SharedArrayBuffer> ToLocalShared(
       v8::internal::Handle<v8::internal::JSArrayBuffer> obj);
 
@@ -376,6 +380,8 @@ MAKE_TO_LOCAL(ToLocalShared, JSArrayBuffer, SharedArrayBuffer)
 
 TYPED_ARRAYS(MAKE_TO_LOCAL_TYPED_ARRAY)
 
+MAKE_TO_LOCAL(ToLocal, Float32x4, Float32x4)
+
 MAKE_TO_LOCAL(ToLocal, FunctionTemplateInfo, FunctionTemplate)
 MAKE_TO_LOCAL(ToLocal, ObjectTemplateInfo, ObjectTemplate)
 MAKE_TO_LOCAL(SignatureToLocal, FunctionTemplateInfo, Signature)