Mercurial > dropbear

comparison libtommath/bn_mp_dr_setup.c @ 1692:1051e4eea25a

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Update LibTomMath to 1.2.0 (#84) * update C files * update other files * update headers * update makefiles * remove mp_set/get_double() * use ltm 1.2.0 API * update ltm_desc * use bundled tommath if system-tommath is too old * XMALLOC etc. were changed to MP_MALLOC etc.
author Steffen Jaeckel <s@jaeckel.eu>
date Tue, 26 May 2020 17:36:47 +0200
parents f52919ffd3b1
children
comparison
equal deleted inserted replaced
1691:2d3745d58843 1692:1051e4eea25a
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 * SPDX-License-Identifier: Unlicense
13 */
14 5
15 /* determines the setup value */ 6 /* determines the setup value */
16 void mp_dr_setup(const mp_int *a, mp_digit *d) 7 void mp_dr_setup(const mp_int *a, mp_digit *d)
17 { 8 {
18 /* the casts are required if DIGIT_BIT is one less than 9 /* the casts are required if MP_DIGIT_BIT is one less than
19 * 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]
20 */ 11 */
21 *d = (mp_digit)(((mp_word)1 << (mp_word)DIGIT_BIT) - (mp_word)a->dp[0]); 12 *d = (mp_digit)(((mp_word)1 << (mp_word)MP_DIGIT_BIT) - (mp_word)a->dp[0]);
22 } 13 }
23 14
24 #endif 15 #endif
25
26 /* ref: HEAD -> master, tag: v1.1.0 */
27 /* git commit: 08549ad6bc8b0cede0b357a9c341c5c6473a9c55 */
28 /* commit time: 2019-01-28 20:32:32 +0100 */