Implemented the RoundUint64ToFloat64 TurboFan operator for x64 and arm64.

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 d4b8e93d100c79ceebc843ddad9fea75127d01d0..ea18062de977dc61eb3682606ef464ce9e0d165a 100644
--- a/src/compiler/raw-machine-assembler.h
+++ b/src/compiler/raw-machine-assembler.h
@@ -464,6 +464,9 @@ class RawMachineAssembler {
   Node* RoundInt64ToFloat64(Node* a) {
     return AddNode(machine()->RoundInt64ToFloat64(), a);
   }
+  Node* RoundUint64ToFloat64(Node* a) {
+    return AddNode(machine()->RoundUint64ToFloat64(), a);
+  }
   Node* BitcastFloat32ToInt32(Node* a) {
     return AddNode(machine()->BitcastFloat32ToInt32(), a);
   }