make array Hermitian before calling complex-to-real FFT #2444
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Array API standard conformance tests for dpnp=0.18.0dev2=py312he4f9c94_20 ran successfully. |
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In this PR, input array is made Hermitian before calling complex-to-real FFT. Input array should be Hermitian before calling complex-to-real FFT otherwise the behavior is undefined. Although it is user responsibility to validate this feature, [NumPy](https://github.com/numpy/numpy/blob/maintenance/2.2.x/numpy/fft/_pocketfft_umath.cpp#L265) and [CuPy](https://github.com/cupy/cupy/blob/v13.4.1/cupy/fft/_fft.py#L109) internally make the input array Hermitian. So, it is done in dpnp for consistency. 8b4a332
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In this PR, input array is made Hermitian before calling complex-to-real FFT.
Input array should be Hermitian before calling complex-to-real FFT otherwise the behavior is undefined. Although it is user responsibility to validate this feature, NumPy and CuPy internally make the input array Hermitian. So, it is done in dpnp for consistency.