python: Add Python 3 workarounds for long

Python 3 doesn't have a separate long type. Make long an alias for int
where needed to maintain compatibility.

Change-Id: I4c0861302bc3a2fa5226b3041803ef975d29b2fd
Signed-off-by: Andreas Sandberg <andreas.sandberg@arm.com>
Reviewed-on: https://gem5-review.googlesource.com/c/15988
Reviewed-by: Nikos Nikoleris <nikos.nikoleris@arm.com>

src/python/m5/SimObject.py

@@ -45,6 +45,9 @@
 
 from __future__ import print_function
 from __future__ import absolute_import
+import six
+if six.PY3:
+    long = int
 
 import sys
 from types import FunctionType, MethodType, ModuleType

src/python/m5/params.py

@@ -60,6 +60,9 @@
 #####################################################################
 
 from __future__ import print_function
+import six
+if six.PY3:
+    long = int
 
 import copy
 import datetime

src/python/m5/proxy.py

@@ -47,6 +47,9 @@
 
 from __future__ import print_function
 from __future__ import absolute_import
+import six
+if six.PY3:
+    long = int
 
 import copy
 

src/python/m5/ticks.py

@@ -27,6 +27,9 @@
 # Authors: Nathan Binkert
 
 from __future__ import print_function
+import six
+if six.PY3:
+    long = int
 
 import sys
 from m5.util import warn

src/python/m5/util/convert.py

@@ -28,6 +28,10 @@
 # Authors: Nathan Binkert
 #          Gabe Black
 
+import six
+if six.PY3:
+    long = int
+
 # metric prefixes
 atto  = 1.0e-18
 femto = 1.0e-15

src/python/m5/util/fdthelper.py

@@ -35,6 +35,10 @@
 #
 # Author: Glenn Bergmans
 
+import six
+if six.PY3:
+    long = int
+
 from m5.ext.pyfdt import pyfdt
 import re
 import os

src/python/m5/util/smartdict.py

@@ -43,6 +43,9 @@
 
 from __future__ import print_function
 from __future__ import absolute_import
+import six
+if six.PY3:
+    long = int
 
 from .convert import *
 from .attrdict import attrdict