tests: lib: cmsis: add CMSIS-NN integration tests

Import a selection of tests from the CMSIS-NN unit testing suite to
validate that the integration into Zephyr is working correctly.

Complete functional testing is left to the complete set of unit-tests
in the externally maintained code.

Signed-off-by: Jordan Yates <[email protected]>

Author: Jordan Yates

tests/lib/cmsis_nn/CMakeLists.txt

@@ -0,0 +1,9 @@
+# SPDX-License-Identifier: Apache-2.0
+
+cmake_minimum_required(VERSION 3.20.0)
+find_package(Zephyr REQUIRED HINTS $ENV{ZEPHYR_BASE})
+project(cmsis_nn)
+
+target_sources(app PRIVATE
+  src/main.c
+)

tests/lib/cmsis_nn/prj.conf

@@ -0,0 +1,14 @@
+CONFIG_ZTEST=y
+CONFIG_NEWLIB_LIBC=y
+CONFIG_CMSIS_DSP=y
+CONFIG_CMSIS_NN=y
+CONFIG_CMSIS_NN_ACTIVATION=y
+CONFIG_CMSIS_NN_BASICMATH=y
+CONFIG_CMSIS_NN_CONCATENATION=y
+CONFIG_CMSIS_NN_CONVOLUTION=y
+CONFIG_CMSIS_NN_FULLYCONNECTED=y
+CONFIG_CMSIS_NN_NNSUPPORT=y
+CONFIG_CMSIS_NN_POOLING=y
+CONFIG_CMSIS_NN_RESHAPE=y
+CONFIG_CMSIS_NN_SOFTMAX=y
+CONFIG_CMSIS_NN_SVD=y