diff options
Diffstat (limited to 'tests/run/overflow_check.pxi')
| -rw-r--r-- | tests/run/overflow_check.pxi | 16 |
1 files changed, 14 insertions, 2 deletions
diff --git a/tests/run/overflow_check.pxi b/tests/run/overflow_check.pxi index 9bfd068a2..0b9844c89 100644 --- a/tests/run/overflow_check.pxi +++ b/tests/run/overflow_check.pxi @@ -1,14 +1,15 @@ cimport cython cdef object two = 2 -cdef int size_in_bits = sizeof(INT) * 8 +cdef int size_in_bits_ = sizeof(INT) * 8 cdef bint is_signed_ = not ((<INT>-1) > 0) -cdef INT max_value_ = <INT>(two ** (size_in_bits - is_signed_) - 1) +cdef INT max_value_ = <INT>(two ** (size_in_bits_ - is_signed_) - 1) cdef INT min_value_ = ~max_value_ cdef INT half_ = max_value_ // <INT>2 # Python visible. +size_in_bits = size_in_bits_ is_signed = is_signed_ max_value = max_value_ min_value = min_value_ @@ -230,6 +231,17 @@ def test_lshift(INT a, int b): """ >>> test_lshift(1, 10) 1024 + >>> test_lshift(1, size_in_bits - 2) == 1 << (size_in_bits - 2) + True + >>> test_lshift(0, size_in_bits - 1) + 0 + >>> test_lshift(1, size_in_bits - 1) == 1 << (size_in_bits - 1) if not is_signed else True + True + >>> if is_signed: expect_overflow(test_lshift, 1, size_in_bits - 1) + >>> expect_overflow(test_lshift, 0, size_in_bits) + >>> expect_overflow(test_lshift, 1, size_in_bits) + >>> expect_overflow(test_lshift, 0, size_in_bits + 1) + >>> expect_overflow(test_lshift, 1, size_in_bits + 1) >>> expect_overflow(test_lshift, 1, 100) >>> expect_overflow(test_lshift, max_value, 1) >>> test_lshift(max_value, 0) == max_value |