kc3-lang/libtommath/mp_reduce_setup.c

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• Hash : c7686f24
  Author :
  Date : 2022-10-02T12:58:53
  

  slightly edit, update and run typos.sh Signed-off-by: Steffen Jaeckel <s@jaeckel.eu>

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• mp_reduce_setup.c

• #include "tommath_private.h"
  #ifdef 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 calculates the value required in "a"
   */
  mp_err mp_reduce_setup(mp_int *a, const mp_int *b)
  {
     mp_err err;
     if ((err = mp_2expt(a, b->used * 2 * MP_DIGIT_BIT)) != MP_OKAY) {
        return err;
     }
     return mp_div(a, b, a, NULL);
  }
  #endif
  

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