mul_fft

[Paul Zimmermann]

       Hi,

about https://gmplib.org/list-archives/gmp-devel/2021-June/005976.html,
the second part of this mail is nonsense, since --enable-old-fft-full
(which was introduced in revision 13152 on Dec 21 2009) has never been
working as expected, since revision 13145 on Dec 20 2009 disabled it
completely (thus with --enable-old-fft-full you still call
mpn_nussbaumer_mul):

#if 0
#define mpn_fft_mul mpn_mul_fft_full
#else
#define mpn_fft_mul mpn_nussbaumer_mul
#endif

Paul