V8: Add SIMD functions.

src/objects.h

Index: src/objects.h
diff --git a/src/objects.h b/src/objects.h
index ee83e3b7a261e6aedce7d333b16e8e7c9f89f0d4..8f678411c19ab8f6848e770cd21273b1cc98fca2 100644
--- a/src/objects.h
+++ b/src/objects.h
@@ -1613,6 +1613,8 @@ class Simd128Value : public HeapObject {
   bool BitwiseEquals(const Simd128Value* other) const;
   // Computes a hash from the 128 bit value, viewed as 4 32-bit integers.
   uint32_t Hash() const;
+  // Copies the 16 bytes of SIMD data to the destination address.
+  void CopyBits(void* destination) const;
 
   // Layout description.
   static const int kValueOffset = HeapObject::kHeaderSize;