2 #ifdef BN_MP_REDUCE_2K_SETUP_C
3 /* LibTomMath, multiple-precision integer library -- Tom St Denis
5 * LibTomMath is a library that provides multiple-precision
6 * integer arithmetic as well as number theoretic functionality.
8 * The library was designed directly after the MPI library by
9 * Michael Fromberger but has been written from scratch with
10 * additional optimizations in place.
12 * The library is free for all purposes without any express
15 * Tom St Denis, tomstdenis@iahu.ca, http://math.libtomcrypt.org
18 /* determines the setup value */
19 int mp_reduce_2k_setup(mp_int *a, mp_digit *d)
24 if ((res = mp_init(&tmp)) != MP_OKAY) {
29 if ((res = mp_2expt(&tmp, p)) != MP_OKAY) {
34 if ((res = s_mp_sub(&tmp, a, &tmp)) != MP_OKAY) {