[turbofan] Support for %_DoubleHi, %_DoubleLo and %_ConstructDouble.

test/unittests/compiler/machine-operator-unittest.cc

Index: test/unittests/compiler/machine-operator-unittest.cc
diff --git a/test/unittests/compiler/machine-operator-unittest.cc b/test/unittests/compiler/machine-operator-unittest.cc
index 6e0df2ab44115f18cf6da30596d5dbef0f47d2aa..dc649e178edb54389befd4b3a12fe8859757f82c 100644
--- a/test/unittests/compiler/machine-operator-unittest.cc
+++ b/test/unittests/compiler/machine-operator-unittest.cc
@@ -206,7 +206,11 @@ const PureOperator kPureOperators[] = {
     PURE(Float64Equal, 2, 0, 1), PURE(Float64LessThan, 2, 0, 1),
     PURE(Float64LessThanOrEqual, 2, 0, 1), PURE(LoadStackPointer, 0, 0, 1),
     PURE(Float64Floor, 1, 0, 1), PURE(Float64Ceil, 1, 0, 1),
-    PURE(Float64RoundTruncate, 1, 0, 1), PURE(Float64RoundTiesAway, 1, 0, 1)
+    PURE(Float64RoundTruncate, 1, 0, 1), PURE(Float64RoundTiesAway, 1, 0, 1),
+    PURE(Float64ExtractLowWord32, 1, 0, 1),
+    PURE(Float64ExtractHighWord32, 1, 0, 1),
+    PURE(Float64InsertLowWord32, 2, 0, 1),
+    PURE(Float64InsertHighWord32, 2, 0, 1)
 #undef PURE
 };