BUG: np.tan(np.inf) test failure #19994
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Numpy has a test failure where `np.tan(np.inf)` is not raising "invalid". The bug is due to an underlying bug in Apple's Libm. The bug is only present on arm64 and does not affect x86_64. The changes here apply to sin, cos, and tan. If the input is a non-finite value, then return `(x - x)`, which will raise "invalid" for `x=INFINITY` as well as return `NAN` for both `INFINITY` and `NAN` as input. Testing: (Note, the testing below is on top of another branch that fixes divide-by-zero failures in reciprocal) Before change: ``` FAILED numpy/core/tests/test_umath.py::TestSpecialFloats::test_tan - AssertionError: FloatingPointError not raised by tan 1 failed, 15589 passed, 302 skipped, 1268 deselected, 31 xfailed, 3 xpassed in 70.99s (0:01:10) ``` After change: ``` 15590 passed, 302 skipped, 1268 deselected, 31 xfailed, 3 xpassed in 71.38s (0:01:11) ```
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Backport of #19974.
Numpy has a test failure where
np.tan(np.inf)is not raising "invalid". The bug is due to an underlying bug in Apple's Libm. The bug is only present on arm64 and does not affect x86_64.The changes here apply to sin, cos, and tan. If the input is a non-finite value, then return
(x - x), which will raise "invalid" forx=INFINITYas well as returnNANfor bothINFINITYandNANas input.Testing:
(Note, the testing below is on top of another branch that fixes divide-by-zero failures in reciprocal)
Before change:
After change: