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Add mixed-mode complex arithmetic to match CPython 3.14 #10780
Description
Follow-up to #10528.
CPython 3.14 added mixed-mode real/complex +, -, *, / with _Py_cr_* / _Py_rc_* (python/cpython#124829).
Numba still promotes the real to complex(x, 0j) and uses the full complex kernel, so results diverge on 3.14+.
For instance,
❯ python
Python 3.14.3 | packaged by Anaconda, Inc. | (main, Feb 24 2026, 22:43:19) [Clang 20.1.8 ] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> from numba import jit
>>> def mul(z, x):
... return z * x
...
>>> nb_mul=jit(mul)
>>> z=complex(float('inf'), 1.0)
>>> mul(z,2.0)
(inf+2j)
>>> nb_mul(z,2.0)
(inf+nanj)
>>>
>>> mul(2.0,z)
(inf+2j)
>>> nb_mul(2.0,z)
(inf+nanj)
Same gap for mixed + / - (e.g. signed zeros: 2 - 0j)
Activity
hiteshsundraaa commentedon Sep 3, 2026
Hi, are you actively working on a fix for this? If not, I’d be happy to take it.
swap357 commentedon Sep 3, 2026
I'm not. Feel free to work on it