Experimental implementation: Exposing SIMD instructions into JavaScript

src/property-details.h

Index: src/property-details.h
diff --git a/src/property-details.h b/src/property-details.h
index 617e9b2af76ff3e9aa6ab9a273c1783866bd4b3a..84cb04c255073b309448a92b7e206ec1899c3a73 100644
--- a/src/property-details.h
+++ b/src/property-details.h
@@ -89,6 +89,8 @@ class Representation {
     kSmi,
     kInteger32,
     kDouble,
+    kFloat32x4,
+    kInt32x4,
     kHeapObject,
     kTagged,
     kExternal,
@@ -108,6 +110,8 @@ class Representation {
   static Representation Smi() { return Representation(kSmi); }
   static Representation Integer32() { return Representation(kInteger32); }
   static Representation Double() { return Representation(kDouble); }
+  static Representation Float32x4() { return Representation(kFloat32x4); }
+  static Representation Int32x4() { return Representation(kInt32x4); }
   static Representation HeapObject() { return Representation(kHeapObject); }
   static Representation External() { return Representation(kExternal); }
 
@@ -137,7 +141,10 @@ class Representation {
 
     ASSERT(kind_ != kExternal);
     ASSERT(other.kind_ != kExternal);
-    if (IsHeapObject()) return other.IsDouble() || other.IsNone();
+    if (IsHeapObject()) {
+      return other.IsDouble() || other.IsFloat32x4() || other.IsInt32x4() ||
+          other.IsNone();
+    }
     if (kind_ == kUInteger8 && other.kind_ == kInteger8) return false;
     if (kind_ == kUInteger16 && other.kind_ == kInteger16) return false;
     return kind_ > other.kind_;
@@ -179,6 +186,8 @@ class Representation {
   bool IsInteger32() const { return kind_ == kInteger32; }
   bool IsSmiOrInteger32() const { return IsSmi() || IsInteger32(); }
   bool IsDouble() const { return kind_ == kDouble; }
+  bool IsFloat32x4() const { return kind_ == kFloat32x4; }
+  bool IsInt32x4() const { return kind_ == kInt32x4; }
   bool IsHeapObject() const { return kind_ == kHeapObject; }
   bool IsExternal() const { return kind_ == kExternal; }
   bool IsSpecialization() const {