[turbofan] Implemented the TruncateFloat32ToUint64 TurboFan operator.

src/compiler/machine-operator.h

Index: src/compiler/machine-operator.h
diff --git a/src/compiler/machine-operator.h b/src/compiler/machine-operator.h
index c62ab0e5e192e745473843fabeac2f22c714a8a2..dd1d1be0deca94bc5f79ad9a40cf619c5c4d3a11 100644
--- a/src/compiler/machine-operator.h
+++ b/src/compiler/machine-operator.h
@@ -209,6 +209,7 @@ class MachineOperatorBuilder final : public ZoneObject {
   const Operator* ChangeFloat64ToUint32();  // narrowing
   const Operator* TruncateFloat32ToInt64();
   const Operator* TruncateFloat64ToInt64();
+  const Operator* TruncateFloat32ToUint64();
   const Operator* TruncateFloat64ToUint64();
   const Operator* ChangeInt32ToFloat64();
   const Operator* ChangeInt32ToInt64();