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comparison libtommath/bn_mp_div_2.c @ 1436:60fc6476e044

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Update to libtommath v1.0
author Matt Johnston <matt@ucc.asn.au>
date Sat, 24 Jun 2017 22:37:14 +0800
parents 5ff8218bcee9
children 8bba51a55704
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1435:f849a5ca2efc 1436:60fc6476e044
1 #include <tommath.h> 1 #include <tommath_private.h>
2 #ifdef BN_MP_DIV_2_C 2 #ifdef BN_MP_DIV_2_C
3 /* LibTomMath, multiple-precision integer library -- Tom St Denis 3 /* LibTomMath, multiple-precision integer library -- Tom St Denis
4 * 4 *
5 * LibTomMath is a library that provides multiple-precision 5 * LibTomMath is a library that provides multiple-precision
6 * integer arithmetic as well as number theoretic functionality. 6 * integer arithmetic as well as number theoretic functionality.
10 * additional optimizations in place. 10 * additional optimizations in place.
11 * 11 *
12 * The library is free for all purposes without any express 12 * The library is free for all purposes without any express
13 * guarantee it works. 13 * guarantee it works.
14 * 14 *
15 * Tom St Denis, [email protected], http://math.libtomcrypt.com 15 * Tom St Denis, [email protected], http://libtom.org
16 */ 16 */
17 17
18 /* b = a/2 */ 18 /* b = a/2 */
19 int mp_div_2(mp_int * a, mp_int * b) 19 int mp_div_2(mp_int * a, mp_int * b)
20 { 20 {
28 } 28 }
29 29
30 oldused = b->used; 30 oldused = b->used;
31 b->used = a->used; 31 b->used = a->used;
32 { 32 {
33 register mp_digit r, rr, *tmpa, *tmpb; 33 mp_digit r, rr, *tmpa, *tmpb;
34 34
35 /* source alias */ 35 /* source alias */
36 tmpa = a->dp + b->used - 1; 36 tmpa = a->dp + b->used - 1;
37 37
38 /* dest alias */ 38 /* dest alias */
61 mp_clamp (b); 61 mp_clamp (b);
62 return MP_OKAY; 62 return MP_OKAY;
63 } 63 }
64 #endif 64 #endif
65 65
66 /* $Source: /cvs/libtom/libtommath/bn_mp_div_2.c,v $ */ 66 /* $Source$ */
67 /* $Revision: 1.3 $ */ 67 /* $Revision$ */
68 /* $Date: 2006/03/31 14:18:44 $ */ 68 /* $Date$ */