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comparison bn_mp_dr_setup.c @ 142:d29b64170cf0 libtommath-orig

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import of libtommath 0.32
author Matt Johnston <matt@ucc.asn.au>
date Sun, 19 Dec 2004 11:33:56 +0000
parents 86e0b50a9b58
children
comparison
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19:e1037a1e12e7 142:d29b64170cf0
1 #include <tommath.h>
2 #ifdef BN_MP_DR_SETUP_C
1 /* LibTomMath, multiple-precision integer library -- Tom St Denis 3 /* LibTomMath, multiple-precision integer library -- Tom St Denis
2 * 4 *
3 * LibTomMath is a library that provides multiple-precision 5 * LibTomMath is a library that provides multiple-precision
4 * integer arithmetic as well as number theoretic functionality. 6 * integer arithmetic as well as number theoretic functionality.
5 * 7 *
10 * The library is free for all purposes without any express 12 * The library is free for all purposes without any express
11 * guarantee it works. 13 * guarantee it works.
12 * 14 *
13 * Tom St Denis, [email protected], http://math.libtomcrypt.org 15 * Tom St Denis, [email protected], http://math.libtomcrypt.org
14 */ 16 */
15 #include <tommath.h>
16 17
17 /* determines the setup value */ 18 /* determines the setup value */
18 void mp_dr_setup(mp_int *a, mp_digit *d) 19 void mp_dr_setup(mp_int *a, mp_digit *d)
19 { 20 {
20 /* the casts are required if DIGIT_BIT is one less than 21 /* the casts are required if DIGIT_BIT is one less than
22 */ 23 */
23 *d = (mp_digit)((((mp_word)1) << ((mp_word)DIGIT_BIT)) - 24 *d = (mp_digit)((((mp_word)1) << ((mp_word)DIGIT_BIT)) -
24 ((mp_word)a->dp[0])); 25 ((mp_word)a->dp[0]));
25 } 26 }
26 27
28 #endif