1#include <tommath.h>
2#ifdef BN_MP_REDUCE_SETUP_C
3/* LibTomMath, multiple-precision integer library -- Tom St Denis
4 *
5 * LibTomMath is a library that provides multiple-precision
6 * integer arithmetic as well as number theoretic functionality.
7 *
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.
11 *
12 * The library is free for all purposes without any express
13 * guarantee it works.
14 *
15 * Tom St Denis, tomstdenis@gmail.com, http://libtom.org
16 */
17
18/* pre-calculate the value required for Barrett reduction
19 * For a given modulus "b" it calulates the value required in "a"
20 */
21int mp_reduce_setup (mp_int * a, mp_int * b)
22{
23  int     res;
24
25  if ((res = mp_2expt (a, b->used * 2 * DIGIT_BIT)) != MP_OKAY) {
26    return res;
27  }
28  return mp_div (a, b, a, NULL);
29}
30#endif
31
32/* $Source: /cvs/libtom/libtommath/bn_mp_reduce_setup.c,v $ */
33/* $Revision: 1.4 $ */
34/* $Date: 2006/12/28 01:25:13 $ */
35