avoid reading data when write mask is full

uncore/src/main/scala/uncore.scala

@@ -150,8 +150,13 @@ abstract class XactTracker extends CoherenceAgentModule {
     connectDataBeatCounter(in.fire(), in.bits.payload, UInt(0))._2
   }
 
-  def addPendingBit[T <: HasTileLinkData with HasTileLinkBeatId](in: DecoupledIO[LogicalNetworkIO[T]]) = {
+  def addPendingBitWhenHasData[T <: HasTileLinkData with HasTileLinkBeatId](in: DecoupledIO[LogicalNetworkIO[T]]) = {
     (Fill(in.bits.payload.tlDataBeats, in.fire() && in.bits.payload.hasData()) &
       UIntToOH(in.bits.payload.addr_beat))
   }
+
+  def addPendingBitWhenWmaskIsNotFull(in: DecoupledIO[LogicalNetworkIO[Acquire]]) = {
+    (Fill(in.bits.payload.tlDataBeats, in.fire() && !in.bits.payload.wmask().andR) &
+      UIntToOH(in.bits.payload.addr_beat))
+  }
 }