Bignum Core: add limb size specific test generation

In Bignum Core the result also involves a carry and both the result and
the carry depend on the size of the limbs.

Before this change both 32 and 64 bit specific result have been passed
to the test functions.

Moving this decision out of the tests makes the test functions easier to
write and read and the test cases easier to read and debug. The change
doesn't make writing the generator script any harder and might even make
reading it easier.

Signed-off-by: Janos Follath <janos.follath@arm.com>

scripts/mbedtls_dev/bignum_core.py

@@ -72,6 +72,24 @@ class BignumCoreOperation(bignum_common.OperationCommon, BignumCoreTarget, metac
             yield cls(a_value, b_value).create_test_case()
 
 
+class BignumCoreOperationArchSplit(BignumCoreOperation):
+    #pylint: disable=abstract-method
+    """Common features for bignum core operations where the result depends on
+    the limb size."""
+
+    def __init__(self, val_a: str, val_b: str, bits_in_limb: int) -> None:
+        super().__init__(val_a, val_b)
+        self.bits_in_limb = bits_in_limb
+        if self.bits_in_limb == 32:
+            self.dependencies = ["MBEDTLS_HAVE_INT32"]
+        elif self.bits_in_limb == 64:
+            self.dependencies = ["MBEDTLS_HAVE_INT64"]
+
+    @classmethod
+    def generate_function_tests(cls) -> Iterator[test_case.TestCase]:
+        for a_value, b_value in cls.get_value_pairs():
+            yield cls(a_value, b_value, 32).create_test_case()
+            yield cls(a_value, b_value, 64).create_test_case()
 
 class BignumCoreAddIf(BignumCoreOperation):
     """Test cases for bignum core add if."""