cpu/o3: clean up rename map and free list

Restructured rename map and free list to clean up some
extraneous code and separate out common code that can
be reused across different register classes (int and fp
at this point).  Both components now consist of a set
of Simple* objects that are stand-alone rename map &
free list for each class, plus a Unified* object that
presents a unified interface across all register
classes and then redirects accesses to the appropriate
Simple* object as needed.

Moved free list initialization to PhysRegFile to better
isolate knowledge of physical register index mappings
to that class (and remove the need to pass a number
of parameters to the free list constructor).

Causes a small change to these stats:
  cpu.rename.int_rename_lookups
  cpu.rename.fp_rename_lookups
because they are now categorized on a per-operand basis
rather than a per-instruction basis.
That is, an instruction with mixed fp/int/misc operand
types will have each operand categorized independently,
where previously the lookup was categorized based on
the instruction type.

1 files changed, 3 insertions, 6 deletions

diff --git a/src/cpu/o3/cpu_policy.hh b/src/cpu/o3/cpu_policy.hh
index a48059202..6db532ade 100644
--- a/src/cpu/o3/cpu_policy.hh
+++ b/src/cpu/o3/cpu_policy.hh
@@ -1,5 +1,6 @@
 /*
  * Copyright (c) 2004-2005 The Regents of The University of Michigan
+ * Copyright (c) 2013 Advanced Micro Devices, Inc.
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -59,14 +60,10 @@
 template<class Impl>
 struct SimpleCPUPolicy
 {
-    /** Typedef for the register file.  Most classes assume a unified
-     * physical register file.
-     */
-    typedef PhysRegFile RegFile;
     /** Typedef for the freelist of registers. */
-    typedef SimpleFreeList FreeList;
+    typedef UnifiedFreeList FreeList;
     /** Typedef for the rename map. */
-    typedef SimpleRenameMap RenameMap;
+    typedef UnifiedRenameMap RenameMap;
     /** Typedef for the ROB. */
     typedef ::ROB<Impl> ROB;
     /** Typedef for the instruction queue/scheduler. */