/usr/include/flint/fft_tuning.h is in libflint-dev 2.5.2-3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 | /* fft_tuning.h -- autogenerated by tune-fft */
#ifndef FFT_TUNING_H
#define FFT_TUNING_H
#include "gmp.h"
#define FFT_TAB \
{ { 4, 4 }, { 4, 3 }, { 3, 2 }, { 2, 1 }, { 2, 1 } }
#define MULMOD_TAB \
{ 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1 }
#define FFT_N_NUM 19
#define FFT_MULMOD_2EXPP1_CUTOFF 128
#endif
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