diff --git a/src/python/m5/util/sorteddict.py b/src/python/m5/util/sorteddict.py
index c91bd943d..ef32be3af 100644
--- a/src/python/m5/util/sorteddict.py
+++ b/src/python/m5/util/sorteddict.py
@@ -24,6 +24,8 @@
 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
+from bisect import bisect_left, bisect_right
+
 class SortedDict(dict):
     def _get_sorted(self):
         return getattr(self, '_sorted', sorted)
@@ -41,6 +43,42 @@ class SortedDict(dict):
             self._sorted_keys = _sorted_keys
             return _sorted_keys
 
+    def _left_eq(self, key):
+        index = self._left_ge(self, key)
+        if self._keys[index] != key:
+            raise KeyError(key)
+        return index
+
+    def _right_eq(self, key):
+        index = self._right_le(self, key)
+        if self._keys[index] != key:
+            raise KeyError(key)
+        return index
+
+    def _right_lt(self, key):
+        index = bisect_left(self._keys, key)
+        if index:
+            return index - 1
+        raise KeyError(key)
+
+    def _right_le(self, key):
+        index = bisect_right(self._keys, key)
+        if index:
+            return index - 1
+        raise KeyError(key)
+
+    def _left_gt(self, key):
+        index = bisect_right(self._keys, key)
+        if index != len(self._keys):
+            return index
+        raise KeyError(key)
+
+    def _left_ge(self, key):
+        index = bisect_left(self._keys, key)
+        if index != len(self._keys):
+            return index
+        raise KeyError(key)
+
     def _del_keys(self):
         try:
             del self._sorted_keys
@@ -86,6 +124,26 @@ class SortedDict(dict):
         for k in self._keys:
             yield k, self[k]
 
+    def keyrange(self, start=None, end=None, inclusive=False):
+        if start is not None:
+            start = self._left_ge(start)
+
+        if end is not None:
+            if inclusive:
+                end = self._right_le(end)
+            else:
+                end = self._right_lt(end)
+
+        return iter(self._keys[start:end+1])
+
+    def valuerange(self, *args, **kwargs):
+        for k in self.keyrange(*args, **kwargs):
+            yield self[k]
+
+    def itemrange(self, *args, **kwargs):
+        for k in self.keyrange(*args, **kwargs):
+            yield k, self[k]
+
     def update(self, *args, **kwargs):
         dict.update(self, *args, **kwargs)
         self._del_keys()
@@ -157,3 +215,6 @@ if __name__ == '__main__':
     print `d`
 
     print d.copy()
+
+    for k,v in d.itemrange('d', 'z', inclusive=True):
+        print k,v