From d4492190e6bbf709724af28d262b0a681c975ec0 Mon Sep 17 00:00:00 2001
From: Gabe Black <gblack@eecs.umich.edu>
Date: Mon, 4 Oct 2010 11:58:06 -0700
Subject: Alpha: Fix Alpha NumMiscArchRegs constant.

Also add asserts in O3's Scoreboard class to catch bad indexes.
---
 src/cpu/o3/scoreboard.cc |  8 +++++++-
 src/cpu/o3/scoreboard.hh | 15 +++++++++++++++
 2 files changed, 22 insertions(+), 1 deletion(-)

(limited to 'src/cpu/o3')

diff --git a/src/cpu/o3/scoreboard.cc b/src/cpu/o3/scoreboard.cc
index ae1e13717..7fb47f3c7 100644
--- a/src/cpu/o3/scoreboard.cc
+++ b/src/cpu/o3/scoreboard.cc
@@ -51,22 +51,25 @@ Scoreboard::Scoreboard(unsigned activeThreads,
     numPhysicalRegs = numPhysicalIntRegs  + numPhysicalFloatRegs;
 
     //Resize scoreboard appropriately
-    regScoreBoard.resize(numPhysicalRegs + (numMiscRegs * activeThreads));
+    resize(numPhysicalRegs + (numMiscRegs * activeThreads));
 
     //Initialize values
     for (int i=0; i < numLogicalIntRegs * activeThreads; i++) {
+        assert(indexInBounds(i));
         regScoreBoard[i] = 1;
     }
 
     for (int i= numPhysicalIntRegs;
          i < numPhysicalIntRegs + (numLogicalFloatRegs * activeThreads);
          i++) {
+        assert(indexInBounds(i));
         regScoreBoard[i] = 1;
     }
 
     for (int i = numPhysicalRegs;
          i < numPhysicalRegs + (numMiscRegs * activeThreads);
          i++) {
+        assert(indexInBounds(i));
         regScoreBoard[i] = 1;
     }
 }
@@ -93,6 +96,7 @@ Scoreboard::getReg(PhysRegIndex phys_reg)
     }
 #endif
 
+    assert(indexInBounds(phys_reg));
     return regScoreBoard[phys_reg];
 }
 
@@ -101,6 +105,7 @@ Scoreboard::setReg(PhysRegIndex phys_reg)
 {
     DPRINTF(Scoreboard, "Setting reg %i as ready\n", phys_reg);
 
+    assert(indexInBounds(phys_reg));
     regScoreBoard[phys_reg] = 1;
 }
 
@@ -120,5 +125,6 @@ Scoreboard::unsetReg(PhysRegIndex ready_reg)
     }
 #endif
 
+    assert(indexInBounds(ready_reg));
     regScoreBoard[ready_reg] = 0;
 }
diff --git a/src/cpu/o3/scoreboard.hh b/src/cpu/o3/scoreboard.hh
index eefff1d8b..b1c2bd026 100644
--- a/src/cpu/o3/scoreboard.hh
+++ b/src/cpu/o3/scoreboard.hh
@@ -111,6 +111,21 @@ class Scoreboard
 
     /** The logical index of the zero register. */
     int zeroRegIdx;
+
+    int currentSize;
+
+    void
+    resize(int newSize)
+    {
+        currentSize = newSize;
+        regScoreBoard.resize(newSize);
+    }
+
+    bool
+    indexInBounds(int idx)
+    {
+        return idx < currentSize;
+    }
 };
 
 #endif
-- 
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