kc3-lang/libtommath/bn_mp_reduce_2k_setup_l.c

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• 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

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• bn_mp_reduce_2k_setup_l.c

• #include "tommath_private.h"
  #ifdef BN_MP_REDUCE_2K_SETUP_L_C
  /* LibTomMath, multiple-precision integer library -- Tom St Denis */
  /* SPDX-License-Identifier: Unlicense */
  
  /* determines the setup value */
  mp_err mp_reduce_2k_setup_l(const mp_int *a, mp_int *d)
  {
     mp_err res;
     mp_int tmp;
  
     if ((res = mp_init(&tmp)) != MP_OKAY) {
        return res;
     }
  
     if ((res = mp_2expt(&tmp, mp_count_bits(a))) != MP_OKAY) {
        goto LBL_ERR;
     }
  
     if ((res = s_mp_sub(&tmp, a, d)) != MP_OKAY) {
        goto LBL_ERR;
     }
  
  LBL_ERR:
     mp_clear(&tmp);
     return res;
  }
  #endif
  

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