1 /* $NetBSD: bn_mp_dr_setup.c,v 1.1.1.2 2014/04/24 12:45:31 pettai Exp $ */
2
3 #include <tommath.h>
4 #ifdef BN_MP_DR_SETUP_C
5 /* LibTomMath, multiple-precision integer library -- Tom St Denis
6 *
7 * LibTomMath is a library that provides multiple-precision
8 * integer arithmetic as well as number theoretic functionality.
9 *
10 * The library was designed directly after the MPI library by
11 * Michael Fromberger but has been written from scratch with
12 * additional optimizations in place.
13 *
14 * The library is free for all purposes without any express
15 * guarantee it works.
16 *
17 * Tom St Denis, tomstdenis@gmail.com, http://libtom.org
18 */
19
20 /* determines the setup value */
mp_dr_setup(mp_int * a,mp_digit * d)21 void mp_dr_setup(mp_int *a, mp_digit *d)
22 {
23 /* the casts are required if DIGIT_BIT is one less than
24 * the number of bits in a mp_digit [e.g. DIGIT_BIT==31]
25 */
26 *d = (mp_digit)((((mp_word)1) << ((mp_word)DIGIT_BIT)) -
27 ((mp_word)a->dp[0]));
28 }
29
30 #endif
31
32 /* Source: /cvs/libtom/libtommath/bn_mp_dr_setup.c,v */
33 /* Revision: 1.4 */
34 /* Date: 2006/12/28 01:25:13 */
35