1 files changed, 51 insertions, 0 deletions
diff --git a/cpu/beta_cpu/bpred_unit.hh b/cpu/beta_cpu/bpred_unit.hh
new file mode 100644
index 000000000..71191f5b7
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+++ b/cpu/beta_cpu/bpred_unit.hh
@@ -0,0 +1,51 @@
+
+#ifndef __BPRED_UNIT_HH__
+#define __BPRED_UNIT_HH__
+
+// For Addr type.
+#include "arch/alpha/isa_traits.hh"
+
+#include "cpu/beta_cpu/2bit_local_pred.hh"
+#include "cpu/beta_cpu/btb.hh"
+
+/**
+ * Basically a wrapper class to hold both the branch predictor
+ * and the BTB.  Right now I'm unsure of the implementation; it would
+ * be nicer to have something closer to the CPUPolicy or the Impl where
+ * this is just typedefs, but it forces the upper level stages to be
+ * aware of the constructors of the BP and the BTB.  The nicer thing
+ * to do is have this templated on the Impl, accept the usual Params
+ * object, and be able to call the constructors on the BP and BTB.
+ */
+template<class Impl>
+class DefaultBPredUnit
+{
+  public:
+    typedef typename Impl::Params Params;
+
+    DefaultBPredUnit(Params &params);
+
+    bool BPLookup(Addr &inst_PC)
+    { return BP.lookup(inst_PC); }
+
+    bool BTBValid(Addr &inst_PC)
+    { return BTB.valid(inst_PC); }
+
+    Addr BTBLookup(Addr &inst_PC)
+    { return BTB.lookup(inst_PC); }
+
+    void BPUpdate(Addr &inst_PC, bool taken)
+    { BP.update(inst_PC, taken); }
+
+    void BTBUpdate(Addr &inst_PC, Addr &target_PC)
+    { BTB.update(inst_PC, target_PC); }
+
+  private:
+
+    DefaultBP BP;
+
+    DefaultBTB BTB;
+
+};
+
+#endif // __BPRED_UNIT_HH__