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

src/compiler/raw-machine-assembler.h

Index: src/compiler/raw-machine-assembler.h
diff --git a/src/compiler/raw-machine-assembler.h b/src/compiler/raw-machine-assembler.h
index 04b1dc6f57cebff7a001225a92e84c868abf70ec..5dac0ac04a5b23cf84fe3de694c76d0b8abb4501 100644
--- a/src/compiler/raw-machine-assembler.h
+++ b/src/compiler/raw-machine-assembler.h
@@ -393,6 +393,14 @@ class RawMachineAssembler : public GraphBuilder {
     return NewNode(machine()->Float64RoundTiesAway(), a);
   }
 
+  // Float64 bit operations.
+  Node* Float64ExtractWord32(int location, Node* a) {
+    return NewNode(machine()->Float64ExtractWord32(location), a);
+  }
+  Node* Float64InsertWord32(int location, Node* a, Node* b) {
+    return NewNode(machine()->Float64InsertWord32(location), a, b);
+  }
+
   // Parameters.
   Node* Parameter(size_t index);