From 7cd166ff9244a720a6e72e651215db891dc1f85e Mon Sep 17 00:00:00 2001 From: Damien George Date: Mon, 7 Mar 2022 12:29:17 +1100 Subject: [PATCH] tests/basics: Add test for creating small-ints in nan-box builds. Signed-off-by: Damien George --- tests/basics/nanbox_smallint.py | 42 +++++++++++++++++++++++++++++ tests/basics/nanbox_smallint.py.exp | 5 ++++ 2 files changed, 47 insertions(+) create mode 100644 tests/basics/nanbox_smallint.py create mode 100644 tests/basics/nanbox_smallint.py.exp diff --git a/tests/basics/nanbox_smallint.py b/tests/basics/nanbox_smallint.py new file mode 100644 index 0000000000..642ca77b37 --- /dev/null +++ b/tests/basics/nanbox_smallint.py @@ -0,0 +1,42 @@ +# Test creating small integers without heap allocation in nan-boxing mode. + +import micropython + +try: + # Test for nan-box build by allocating a float while heap is locked. + # This should pass on nan-box builds. + micropython.heap_lock() + float(123) + micropython.heap_unlock() +except: + print("SKIP") + raise SystemExit + +# Check that nan-boxing uses 64-bit floats (eg it's not object representation C). +if float("1e100") == float("inf"): + print("SKIP") + raise SystemExit + +micropython.heap_lock() +print(int("0x80000000")) +micropython.heap_unlock() + +# This is the most positive small integer. +micropython.heap_lock() +print(int("0x3fffffffffff")) +micropython.heap_unlock() + +# This is the most negative small integer. +micropython.heap_lock() +print(int("-0x3fffffffffff") - 1) +micropython.heap_unlock() + +x = 1 +micropython.heap_lock() +print((x << 31) + 1) +micropython.heap_unlock() + +x = 1 +micropython.heap_lock() +print((x << 45) + 1) +micropython.heap_unlock() diff --git a/tests/basics/nanbox_smallint.py.exp b/tests/basics/nanbox_smallint.py.exp new file mode 100644 index 0000000000..aad1f7b8b6 --- /dev/null +++ b/tests/basics/nanbox_smallint.py.exp @@ -0,0 +1,5 @@ +2147483648 +70368744177663 +-70368744177664 +2147483649 +35184372088833