pub unsafe extern "C" fn fft_convolution(
ii: *mut *mut mp_limb_t,
jj: *mut *mut mp_limb_t,
depth: slong,
limbs: slong,
trunc: slong,
t1: *mut *mut mp_limb_t,
t2: *mut *mut mp_limb_t,
s1: *mut *mut mp_limb_t,
tt: *mut *mut mp_limb_t,
)