Function acb_dot_precise 

pub unsafe extern "C" fn acb_dot_precise(
    res: *mut acb_struct,
    initial: *mut acb_struct,
    subtract: c_int,
    x: acb_srcptr,
    xstep: mp_limb_signed_t,
    y: acb_srcptr,
    ystep: mp_limb_signed_t,
    len: mp_limb_signed_t,
    prec: mp_limb_signed_t,
)