Trigger only on supported HW

Author: Rohanjames1997

tests/test-quantize-fns.cpp

@@ -179,12 +179,18 @@ int main(int argc, char * argv[]) {
             // Test i8mm path (nrc=2) for supported types
             if (type == GGML_TYPE_Q4_0 || type == GGML_TYPE_Q4_1 || type == GGML_TYPE_Q8_0 || 
                 type == GGML_TYPE_Q4_K || type == GGML_TYPE_Q6_K) {
+#if defined(__ARM_FEATURE_MATMUL_INT8)
                 const float vec_dot_error_i8mm = dot_product_error(qfns, qfns_cpu, test_size, test_data.data(), test_data2.data(), 2);
                 failed = !(vec_dot_error_i8mm < max_allowed_error);
                 num_failed += failed;
                 if (failed || verbose) {
                     printf("%5s dot product error (i8mm):     %s (%f)\n", ggml_type_name(type), RESULT_STR[failed], vec_dot_error_i8mm);
                 }
+#else
+                if (verbose) {
+                    printf("%5s dot product (i8mm):           SKIPPED (not supported)\n", ggml_type_name(type));
+                }
+#endif
             }
         }
     }