Change dtype check in default verify function, fixes issue 245

Author: stijnh

kernel_tuner/core.py

@@ -815,9 +815,9 @@ def _default_verify_function(instance, answer, result_host, atol, verbose):
             if isinstance(answer[i], (np.ndarray, cp.ndarray)) and isinstance(
                 arg, (np.ndarray, cp.ndarray)
             ):
-                if answer[i].dtype != arg.dtype:
+                if not np.can_cast(arg.dtype, answer[i].dtype):
                     raise TypeError(
-                        f"Element {i} of the expected results list is not of the same dtype as the kernel output: "
+                        f"Element {i} of the expected results list has a dtype that is not compatible with the dtype of the kernel output: "
                         + str(answer[i].dtype)
                         + " != "
                         + str(arg.dtype)