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simplesshd/dropbear/libtommath/bn_mp_dr_setup.c
2020-12-28 16:40:37 -05:00

16 lines
467 B
C

#include "tommath_private.h"
#ifdef BN_MP_DR_SETUP_C
/* LibTomMath, multiple-precision integer library -- Tom St Denis */
/* SPDX-License-Identifier: Unlicense */
/* determines the setup value */
void mp_dr_setup(const mp_int *a, mp_digit *d)
{
/* the casts are required if MP_DIGIT_BIT is one less than
* the number of bits in a mp_digit [e.g. MP_DIGIT_BIT==31]
*/
*d = (mp_digit)(((mp_word)1 << (mp_word)MP_DIGIT_BIT) - (mp_word)a->dp[0]);
}
#endif