Added IBM Cell SDK 2.x software_cache to Bullet/Extras. There is an option to enable it for the BulletMultiThreaded Cell version.

See USE_SOFTWARE_CACHE in Bullet\src\BulletMultiThreaded\SpuNarrowPhaseCollisionTask\SpuGatheringCollisionTask.cpp
It improves the Bullet midphase collision detection (triangle/vertex fetch)
The license is CommonPublicLicense-1.0, see included license docs.

Extras/software_cache/cache/include/Makefile

@@ -0,0 +1,28 @@
+# --------------------------------------------------------------- 
+# PLEASE DO NOT MODIFY THIS SECTION                               
+# This prolog section is automatically generated.                 
+#                                                                 
+# (C) Copyright 2001,2006,                                        
+# International Business Machines Corporation,                    
+#                                                                 
+# All Rights Reserved.                                            
+# --------------------------------------------------------------- 
+# PROLOG END TAG zYx                                              
+
+########################################################################
+#			Common Makefile
+########################################################################
+
+INSTALL_DIR             = $(SDKINC_spu)/cache
+
+INSTALL_FILES := api.h				\
+		 defs.h				\
+		 dma.h				\
+		 nway.h				\
+		 nway-lookup.h			\
+		 nway-miss.h			\
+		 nway-opt.h			\
+		 nway-replace.h			\
+		 spe_cache.h
+
+include ../../../../../make.footer