tommath/bn_mp_dr_setup.c

33 lines
903 B
C
Raw Normal View History

2004-10-29 18:07:18 -04:00
#include <tommath.h>
#ifdef BN_MP_DR_SETUP_C
2003-08-04 21:24:44 -04:00
/* LibTomMath, multiple-precision integer library -- Tom St Denis
*
* LibTomMath is a library that provides multiple-precision
* integer arithmetic as well as number theoretic functionality.
*
* The library was designed directly after the MPI library by
* Michael Fromberger but has been written from scratch with
* additional optimizations in place.
*
* The library is free for all purposes without any express
* guarantee it works.
*
2007-04-18 05:58:18 -04:00
* Tom St Denis, tomstdenis@gmail.com, http://libtom.org
2003-08-04 21:24:44 -04:00
*/
/* determines the setup value */
void mp_dr_setup(mp_int *a, mp_digit *d)
{
/* the casts are required if DIGIT_BIT is one less than
* the number of bits in a mp_digit [e.g. DIGIT_BIT==31]
*/
*d = (mp_digit)((((mp_word)1) << ((mp_word)DIGIT_BIT)) -
((mp_word)a->dp[0]));
}
2004-10-29 18:07:18 -04:00
#endif
2005-08-01 12:37:28 -04:00
/* $Source$ */
/* $Revision$ */
/* $Date$ */