selftests/powerpc: Add memcmp testcase

Add a testcase for the new ppc64 memcmp.

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

tools/testing/selftests/powerpc/stringloops/Makefile

@@ -0,0 +1,20 @@
+# The loops are all 64-bit code
+CFLAGS += -m64
+CFLAGS += -I$(CURDIR)
+
+PROGS := memcmp
+EXTRA_SOURCES := memcmp_64.S ../harness.c
+
+all: $(PROGS)
+
+$(PROGS): $(EXTRA_SOURCES)
+
+run_tests: all
+	@-for PROG in $(PROGS); do \
+		./$$PROG; \
+	done;
+
+clean:
+	rm -f $(PROGS) *.o
+
+.PHONY: all run_tests clean