qa: Update QA code to new interface

With this commit, our QA code should work again. However, it still
relies on C types in the C++ domain. We probably want to add a C++
wrapper around C VOLK.

The idea:
- add `volk.hh`
- Include C++ magic in here.
- Find idiomatic, modern C++ interface defition.

Author: jdemel

lib/kernel_tests.h

@@ -33,7 +33,8 @@ std::vector<volk_test_case_t> init_test_list(volk_test_params_t test_params)
     test_params_power.set_scalar(2.5);
 
     volk_test_params_t test_params_rotator(test_params);
-    test_params_rotator.set_scalar(std::polar(1.0f, 0.1f));
+    auto rotator_value = std::polar(1.0f, 0.1f);
+    test_params_rotator.set_scalar(lv_32fc_t{rotator_value.real(), rotator_value.imag()});
     test_params_rotator.set_tol(1e-3);
 
     std::vector<volk_test_case_t> test_cases;

lib/qa_utils.cc

@@ -627,7 +627,7 @@ bool run_volk_tests(volk_func_desc_t desc,
                 } else {
                     run_cast_test1_s32f((volk_fn_1arg_s32f)(manual_func),
                                         test_data[i],
-                                        scalar.real(),
+                                        __real__ scalar,
                                         vlen,
                                         iter,
                                         arch_list[i]);
@@ -650,7 +650,7 @@ bool run_volk_tests(volk_func_desc_t desc,
                 } else {
                     run_cast_test2_s32f((volk_fn_2arg_s32f)(manual_func),
                                         test_data[i],
-                                        scalar.real(),
+                                        __real__ scalar,
                                         vlen,
                                         iter,
                                         arch_list[i]);
@@ -673,7 +673,7 @@ bool run_volk_tests(volk_func_desc_t desc,
                 } else {
                     run_cast_test3_s32f((volk_fn_3arg_s32f)(manual_func),
                                         test_data[i],
-                                        scalar.real(),
+                                        __real__ scalar,
                                         vlen,
                                         iter,
                                         arch_list[i]);