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FFmpeg/tests/checkasm/av_tx.c
Lynne ace42cf581 x86/tx_float: add 15xN PFA FFT AVX SIMD 
~4x faster than the C version.
The shuffles in the 15pt dim1 are seriously expensive. Not happy with it,
but I'm contempt.

Can be easily converted to pure AVX by removing all vpermpd/vpermps
instructions.
2022-09-23 12:35:27 +02:00

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