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mirror of https://github.com/FFmpeg/FFmpeg.git synced 2025-02-20 07:48:15 +02:00
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.
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