1 #include <tommath.h> 2 #ifdef BN_MP_DR_SETUP_C 3 /* LibTomMath, multiple-precision integer library -- Tom St Denis 4 * 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, tomstdenis (at) gmail.com, http://math.libtomcrypt.com 16 */ 17 18 /* determines the setup value */ 19 void mp_dr_setup(mp_int *a, mp_digit *d) 20 { 21 /* the casts are required if DIGIT_BIT is one less than 22 * the number of bits in a mp_digit [e.g. DIGIT_BIT==31] 23 */ 24 *d = (mp_digit)((((mp_word)1) << ((mp_word)DIGIT_BIT)) - 25 ((mp_word)a->dp[0])); 26 } 27 28 #endif 29 30 /* $Source: /cvs/libtom/libtommath/bn_mp_dr_setup.c,v $ */ 31 /* $Revision: 1.3 $ */ 32 /* $Date: 2006/03/31 14:18:44 $ */ 33
