Fallback for Power kernels

Author: kavanabhat

Makefile.system

@@ -145,8 +145,13 @@ endif
 ifeq ($(TARGET), POWER8)
 GETARCH_FLAGS := -DFORCE_POWER6
 endif
+ifeq ($(TARGET), POWER9)
+GETARCH_FLAGS := -DFORCE_POWER6
+endif
+ifeq ($(TARGET), POWER10)
+GETARCH_FLAGS := -DFORCE_POWER6
+endif
 endif
-
 
 #TARGET_CORE will override TARGET which is used in DYNAMIC_ARCH=1.
 #
@@ -267,6 +272,10 @@ endif
 ifndef GOTOBLAS_MAKEFILE
 export GOTOBLAS_MAKEFILE = 1
 
+# Determine if the assembler is GNU Assembler
+HAVE_GAS := $(shell $(AS) -v < /dev/null 2>&1 | grep GNU 2>&1 >/dev/null ; echo $$?)
+GETARCH_FLAGS += -DHAVE_GAS=$(HAVE_GAS)
+
 # Generating Makefile.conf and config.h
 DUMMY := $(shell $(MAKE) -C $(TOPDIR) -f Makefile.prebuild CC="$(CC)" FC="$(FC)" HOSTCC="$(HOSTCC)" HOST_CFLAGS="$(GETARCH_FLAGS)" CFLAGS="$(CFLAGS)" BINARY=$(BINARY) USE_OPENMP=$(USE_OPENMP) TARGET_CORE=$(TARGET_CORE) ONLY_CBLAS=$(ONLY_CBLAS) TARGET=$(TARGET) all)
 
@@ -368,8 +377,6 @@ GCCMINORVERSIONGTEQ2 := $(shell expr `$(CC) $(GCCDUMPVERSION_PARAM) | cut -f2 -d
 GCCMINORVERSIONGTEQ7 := $(shell expr `$(CC) $(GCCDUMPVERSION_PARAM) | cut -f2 -d.` \>= 7)
 endif
 
-HAVE_GAS := $(shell $(AS) -v < /dev/null 2>&1 | grep GNU 2>&1 >/dev/null ; echo $$?)
-
 #
 #  OS dependent settings
 #

param.h

@@ -2598,8 +2598,13 @@ USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 #define SGEMM_DEFAULT_UNROLL_M 16
 #define SGEMM_DEFAULT_UNROLL_N 8
+#if defined(HAVE_GAS) && (HAVE_GAS == 1) 
+#define DGEMM_DEFAULT_UNROLL_M 16
+#define DGEMM_DEFAULT_UNROLL_N 4
+#else
 #define DGEMM_DEFAULT_UNROLL_M 8
 #define DGEMM_DEFAULT_UNROLL_N 8
+#endif
 #define CGEMM_DEFAULT_UNROLL_M 8
 #define CGEMM_DEFAULT_UNROLL_N 4
 #define ZGEMM_DEFAULT_UNROLL_M 8