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, 2 insertions, 1 deletions

diff --git a/src/cpu/o3/cpu.hh b/src/cpu/o3/cpu.hh
index 98a6972e9..1a1f8f8a3 100644
--- a/src/cpu/o3/cpu.hh
+++ b/src/cpu/o3/cpu.hh
@@ -1,5 +1,6 @@
 /*
  * Copyright (c) 2011-2013 ARM Limited
+ * Copyright (c) 2013 Advanced Micro Devices, Inc.
  * All rights reserved
  *
  * The license below extends only to copyright in the software and shall
@@ -655,7 +656,7 @@ class FullO3CPU : public BaseO3CPU
     typename CPUPolicy::Commit commit;
 
     /** The register file. */
-    typename CPUPolicy::RegFile regFile;
+    PhysRegFile regFile;
 
     /** The free list. */
     typename CPUPolicy::FreeList freeList;