parameters: update configs for tage and ittage

* modify the largest history length to be 65 in order to avoid
  2 level xors on speculative update

* update ittage parameters to be an optimized one

src/main/scala/xiangshan/Parameters.scala

@@ -75,16 +75,15 @@ case class XSCoreParameters
         ( 256*8,    8,    8),
         ( 256*8,   16,    8),
         ( 128*8,   32,    9),
-        ( 128*8,   64,    9)),
+        ( 128*8,   65,    9)),
   ITTageTableInfos: Seq[Tuple3[Int,Int,Int]] =
   //      Sets  Hist   Tag
-     Seq(( 512,    0,    0),
-         ( 512,    2,    7),
-         ( 512,    4,    7),
-         ( 512,    8,    8),
-         ( 512,   16,    8),
-         ( 512,   32,    9),
-         ( 512,   64,    9)),
+    Seq(( 512,    0,    0),
+        ( 256,    4,    8),
+        ( 256,    8,    8),
+        ( 512,   12,    8),
+        ( 512,   16,    8),
+        ( 512,   32,    8)),
   SCNRows: Int = 1024,
   SCNTables: Int = 6,
   SCCtrBits: Int = 6,