add 64-bit avx512 test to Makefile
diff --git a/test/Makefile b/test/Makefile
index 69256e2..5da5e8a 100644
--- a/test/Makefile
+++ b/test/Makefile
@@ -59,7 +59,9 @@
 
 test_avx512: normalize_prefix
 	./test_avx512.sh
-
+ifeq ($(BIT),64)
+	./test_avx512.sh 64
+endif
 clean:
 	rm -rf *.o $(TARGET) lib_run