Raise not-implemented exception on numpy fallback

Author: antonwolfy

dpnp/config.py

@@ -1,6 +1,6 @@
 # -*- coding: utf-8 -*-
 # *****************************************************************************
-# Copyright (c) 2016-2020, Intel Corporation
+# Copyright (c) 2016-2022, Intel Corporation
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
@@ -52,3 +52,8 @@
 '''
 Explicitly use SYCL shared memory parameter in DPCtl array constructor for creation functions
 '''
+
+__DPNP_RAISE_EXCEPION_ON_NUMPY_FALLBACK__ = int(os.getenv('__DPNP_RAISE_EXCEPION_ON_NUMPY_FALLBACK__', 1))
+'''
+Trigger non-implemented exception when DPNP fallbacks on NumPy implementation
+'''

dpnp/dpnp_utils/dpnp_algo_utils.pyx

@@ -1,7 +1,7 @@
 # cython: language_level=3
 # -*- coding: utf-8 -*-
 # *****************************************************************************
-# Copyright (c) 2016-2020, Intel Corporation
+# Copyright (c) 2016-2022, Intel Corporation
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
@@ -114,6 +114,10 @@ def call_origin(function, *args, **kwargs):
     Call fallback function for unsupported cases
     """
 
+    if config.__DPNP_RAISE_EXCEPION_ON_NUMPY_FALLBACK__:
+        raise NotImplementedError(f"Requested funtion={function.__name__} with args={args} and kwargs={kwargs} "
+                                  "isn't currently supported, fallback on NumPy implementation.")
+
     dpnp_inplace = kwargs.pop("dpnp_inplace", False)
     # print(f"DPNP call_origin(): Fallback called. \n\t function={function}, \n\t args={args}, \n\t kwargs={kwargs}, \n\t dpnp_inplace={dpnp_inplace}")