V8: Add SIMD functions.

src/objects.h

Index: src/objects.h
diff --git a/src/objects.h b/src/objects.h
index 6d052ef3a6d43cb43a2e874393298c7897e2bfe3..257f0e54c35d198f2c6ee16d605e961702edf4f7 100644
--- a/src/objects.h
+++ b/src/objects.h
@@ -1611,6 +1611,8 @@ 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;