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comparison libtommath/bn_mp_dr_setup.c @ 1739:13d834efc376 fuzz

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merge from main
author Matt Johnston <matt@ucc.asn.au>
date Thu, 15 Oct 2020 19:55:15 +0800
parents 1051e4eea25a
children
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1562:768ebf737aa0 1739:13d834efc376
1 #include <tommath_private.h> 1 #include "tommath_private.h"
2 #ifdef BN_MP_DR_SETUP_C 2 #ifdef BN_MP_DR_SETUP_C
3 /* LibTomMath, multiple-precision integer library -- Tom St Denis 3 /* LibTomMath, multiple-precision integer library -- Tom St Denis */
4 * 4 /* SPDX-License-Identifier: Unlicense */
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, [email protected], http://libtom.org
16 */
17 5
18 /* determines the setup value */ 6 /* determines the setup value */
19 void mp_dr_setup(mp_int *a, mp_digit *d) 7 void mp_dr_setup(const mp_int *a, mp_digit *d)
20 { 8 {
21 /* the casts are required if DIGIT_BIT is one less than 9 /* the casts are required if MP_DIGIT_BIT is one less than
22 * the number of bits in a mp_digit [e.g. DIGIT_BIT==31] 10 * the number of bits in a mp_digit [e.g. MP_DIGIT_BIT==31]
23 */ 11 */
24 *d = (mp_digit)((((mp_word)1) << ((mp_word)DIGIT_BIT)) - 12 *d = (mp_digit)(((mp_word)1 << (mp_word)MP_DIGIT_BIT) - (mp_word)a->dp[0]);
25 ((mp_word)a->dp[0]));
26 } 13 }
27 14
28 #endif 15 #endif
29
30 /* ref: $Format:%D$ */
31 /* git commit: $Format:%H$ */
32 /* commit time: $Format:%ai$ */