kc3-lang/libtommath/bn_mp_reduce_setup.c

• Show log

  Commit

• Hash : 4534056c
  Author :
  Date : 2019-05-13T00:22:18
  

  use enums mp_err, mp_ord, mp_bool, mp_sign * MP_USE_ENUMS enables enums * Wc++-compat catches some implicit conversions if MP_USE_ENUMS is defined * 100% backwards compatible API/ABI if MP_USE_ENUMS is not defined

Download

• bn_mp_reduce_setup.c

• #include "tommath_private.h"
  #ifdef BN_MP_REDUCE_SETUP_C
  /* LibTomMath, multiple-precision integer library -- Tom St Denis */
  /* SPDX-License-Identifier: Unlicense */
  
  /* pre-calculate the value required for Barrett reduction
   * For a given modulus "b" it calulates the value required in "a"
   */
  mp_err mp_reduce_setup(mp_int *a, const mp_int *b)
  {
     mp_err res;
     if ((res = mp_2expt(a, b->used * 2 * MP_DIGIT_BIT)) != MP_OKAY) {
        return res;
     }
     return mp_div(a, b, a, NULL);
  }
  #endif
  

Download