Init POWER8 kernels by POWER6.

getarch.c

@@ -565,6 +565,19 @@ USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #define CORENAME  "POWER6"
 #endif
 
+#if defined(FORCE_POWER8)
+#define FORCE
+#define ARCHITECTURE    "POWER"
+#define SUBARCHITECTURE "POWER8"
+#define SUBDIRNAME      "power"
+#define ARCHCONFIG   "-DPOWER8 " \
+		     "-DL1_DATA_SIZE=65536 -DL1_DATA_LINESIZE=128 " \
+		     "-DL2_SIZE=4194304 -DL2_LINESIZE=128 " \
+		     "-DDTB_DEFAULT_ENTRIES=128 -DDTB_SIZE=4096 -DL2_ASSOCIATIVE=8 "
+#define LIBNAME   "power8"
+#define CORENAME  "POWER8"
+#endif
+
 #ifdef FORCE_PPCG4
 #define FORCE
 #define ARCHITECTURE    "POWER"