diff --git a/src/main/scala/lib/el2_lib.scala b/src/main/scala/lib/el2_lib.scala
index abc77fa3..9c34e627 100644
--- a/src/main/scala/lib/el2_lib.scala
+++ b/src/main/scala/lib/el2_lib.scala
@@ -189,7 +189,14 @@ trait el2_lib extends param{
         case(true,false)  => 68*ICACHE_NUM_WAYS
         case(true,true)   => 71*ICACHE_NUM_WAYS
     }
-
+  def rvmaskandmatch(mask:UInt, data:UInt, masken:Bool):UInt={
+    val matchvec = Wire(Vec(data.getWidth,UInt(1.W)))
+    val masken_or_fullmask = masken & ~mask.andR
+    matchvec(0)  :=  masken_or_fullmask | (mask(0) === data(0)).asUInt
+    for(i <- 1 to data.getWidth-1)
+      matchvec(i) := Mux(mask(i-1,0).andR & masken_or_fullmask,"b1".U,(mask(i) === data(i)).asUInt)
+    matchvec.asUInt
+  }
   val data_mem_size : Int = memory_cal
   // Move rvecc_encode to a proper trait
   def rvecc_encode(din:UInt) = {   //Done for verification and testing