kc3-lang/libtommath/bn_mp_tc_div_2d.c

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• Hash : 8b9f98ba
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  Date : 2018-09-23T21:37:58
  

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• bn_mp_tc_div_2d.c

• #include "tommath_private.h"
  #ifdef BN_MP_TC_DIV_2D_C
  /* 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.
   */
  
  /* two complement right shift */
  int mp_tc_div_2d(const mp_int *a, int b, mp_int *c)
  {
     int res;
     if (mp_isneg(a) == MP_NO) {
        return mp_div_2d(a, b, c, NULL);
     }
  
     res = mp_add_d(a, 1uL, c);
     if (res != MP_OKAY) {
        return res;
     }
  
     res = mp_div_2d(c, b, c, NULL);
     return (res == MP_OKAY) ? mp_sub_d(c, 1uL, c) : res;
  }
  #endif
  
  /* ref:         $Format:%D$ */
  /* git commit:  $Format:%H$ */
  /* commit time: $Format:%ai$ */
  

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