invisispec-1.0 source

1 files changed, 63 insertions, 0 deletions

diff --git a/src/cpu/pred/static.cc b/src/cpu/pred/static.cc
new file mode 100644
index 000000000..f3844e388
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+++ b/src/cpu/pred/static.cc
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+/*
+ * Copyright (c) 2004-2006 The Regents of The University of Michigan
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met: redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer;
+ * redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution;
+ * neither the name of the copyright holders nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * Authors: Kevin Lim
+ */
+
+#include "cpu/pred/static.hh"
+
+StaticBP::StaticBP(const StaticBPParams *params)
+    : BPredUnit(params),
+      staticPrediction(params->staticPrediction)
+{
+
+}
+
+void
+StaticBP::btbUpdate(ThreadID tid, Addr branch_addr, void * &bp_history)
+{
+// Place holder for a function that is called to update predictor history when
+// a BTB entry is invalid or not found.
+}
+
+
+bool
+StaticBP::lookup(ThreadID tid, Addr branch_addr, void * &bp_history)
+{
+    return staticPrediction;
+}
+
+void
+StaticBP::uncondBranch(ThreadID tid, Addr pc, void *&bp_history)
+{
+}
+
+StaticBP*
+StaticBPParams::create()
+{
+    return new StaticBP(this);
+}