Mercurial > dropbear
comparison libtommath/bn_mp_dr_setup.c @ 1692:1051e4eea25a
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> |
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date | Tue, 26 May 2020 17:36:47 +0200 |
parents | f52919ffd3b1 |
children |
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1691:2d3745d58843 | 1692:1051e4eea25a |
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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 */ |