Test _ScalarAbi<N>

ChangeLog:

	* tests/misc.cpp: Disable conversion to vector builtins with
	_ScalarAbi.
	* tests/unittest.h:

Author: mattkretz

tests/misc.cpp

@@ -18,7 +18,7 @@ template <typename V>
     using T = typename V::value_type;
     using M = typename V::mask_type;
 
-    ADD_TEST(misc) {
+    ADD_TEST(misc, !simd::__scalar_abi_tag<typename V::abi_type>) {
       std::tuple{vec<V, 0, 100, 2, 54, 3>},
       [](auto& t, V x) {
         t.verify_equal(x, x);

tests/unittest.h

@@ -197,6 +197,15 @@ void test_runner()
               for (auto f : run_functions)
                 f();
             }
+          if constexpr (!std::is_same_v<typename simd::vec<T, N>::abi_type, simd::_ScalarAbi<N>>)
+            {
+              using V = simd::basic_vec<T, simd::_ScalarAbi<N>>;
+              std::cout << "Testing " << type_to_string<V>() << ':' << std::endl;
+              run_functions.clear();
+              [[maybe_unused]] Tests<V> t0 = {};
+              for (auto f : run_functions)
+                f();
+            }
         }
       else
         {