Add proper checks for fits-in-small-int. Make it reusable.

We likely should make mp_obj_new_int() inline, and rely on its
encapsulated check rather than inline checks everywhere explicitly.

Also, parser for big small int values is still broken.

1 files changed, 26 insertions, 0 deletions

diff --git a/tests/basics/tests/int-small.py b/tests/basics/tests/int-small.py
new file mode 100644
index 000000000..be338c4a4
--- /dev/null
+++ b/tests/basics/tests/int-small.py
@@ -0,0 +1,26 @@
+# This test small int range for 32-bit machine
+
+a = 0x3fffff
+print(a)
+a *= 0x10
+print(a)
+a *= 0x10
+print(a)
+a += 0xff
+print(a)
+# This would overflow
+#a += 1
+
+a = -0x3fffff
+print(a)
+a *= 0x10
+print(a)
+a *= 0x10
+print(a)
+a -= 0xff
+print(a)
+# This still doesn't overflow
+a -= 1
+print(a)
+# This would overflow
+#a -= 1