RND microkernels and tests

PiperOrigin-RevId: 315493586
diff --git a/src/xnnpack/isa-checks.h b/src/xnnpack/isa-checks.h
index d056410..0c6aabe 100644
--- a/src/xnnpack/isa-checks.h
+++ b/src/xnnpack/isa-checks.h
@@ -87,6 +87,13 @@
     } \
   } while (0)
 
+#define TEST_REQUIRES_ARM_NEON_V8 \
+  do { \
+    if (!cpuinfo_initialize() || !cpuinfo_has_arm_neon_v8()) { \
+      GTEST_SKIP(); \
+    } \
+  } while (0)
+
 #define TEST_REQUIRES_ARM_NEON_FP16_ARITH \
   do { \
     if (!cpuinfo_initialize() || !cpuinfo_has_arm_neon_fp16_arith()) { \