X64: Adding macro to load double from memory, and use SSE3 instruction if present.

src/x64/stub-cache-x64.cc

Index: src/x64/stub-cache-x64.cc
diff --git a/src/x64/stub-cache-x64.cc b/src/x64/stub-cache-x64.cc
index ef6f7583882016c5133b4706b3cf4047aab6bf79..35f659b7bf069d54b5f59d95f563351f77037f6a 100644
--- a/src/x64/stub-cache-x64.cc
+++ b/src/x64/stub-cache-x64.cc
@@ -3391,7 +3391,7 @@ MaybeObject* ExternalArrayStubCompiler::CompileKeyedStoreStub(
     // The WebGL specification leaves the behavior of storing NaN and
     // +/-Infinity into integer arrays basically undefined. For more
     // reproducible behavior, convert these to zero.
-    __ movsd(xmm0, FieldOperand(rax, HeapNumber::kValueOffset));
+    __ LoadDbl(xmm0, FieldOperand(rax, HeapNumber::kValueOffset));
     __ movq(rbx, FieldOperand(rbx, ExternalArray::kExternalPointerOffset));
     // rdi: untagged index
     // rbx: base pointer of external storage