44 lines
1.2 KiB
Python
44 lines
1.2 KiB
Python
import random
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import numpy as np
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from numba import njit
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from numba.core import types
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import unittest
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class TestMulti3(unittest.TestCase):
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"""
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This test is only relevant for 32-bit architectures.
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Test __multi3 implementation in _helperlib.c.
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The symbol defines a i128 multiplication.
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It is necessary for working around an issue in LLVM (see issue #969).
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The symbol does not exist in 32-bit platform, and should not be used by
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LLVM. However, optimization passes will create i65 multiplication that
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is then lowered to __multi3.
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"""
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def test_multi3(self):
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@njit("(int64,)")
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def func(x):
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res = 0
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for i in range(x):
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res += i
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return res
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x_cases = [-1, 0, 1, 3, 4, 8,
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0xffffffff - 1, 0xffffffff, 0xffffffff + 1,
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0x123456789abcdef, -0x123456789abcdef]
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for _ in range(500):
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x_cases.append(random.randint(0, 0xffffffff))
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def expected(x):
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if x <= 0: return 0
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return ((x * (x - 1)) // 2) & (2**64 - 1)
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for x in x_cases:
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self.assertEqual(expected(x), func(x))
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if __name__ == '__main__':
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unittest.main()
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