1  /* Test mpn_gcd_22.
       2  
       3  Copyright 2019 Free Software Foundation, Inc.
       4  
       5  This file is part of the GNU MP Library test suite.
       6  
       7  The GNU MP Library test suite is free software; you can redistribute it
       8  and/or modify it under the terms of the GNU General Public License as
       9  published by the Free Software Foundation; either version 3 of the License,
      10  or (at your option) any later version.
      11  
      12  The GNU MP Library test suite is distributed in the hope that it will be
      13  useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
      14  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General
      15  Public License for more details.
      16  
      17  You should have received a copy of the GNU General Public License along with
      18  the GNU MP Library test suite.  If not, see https://www.gnu.org/licenses/.  */
      19  
      20  #include <stdio.h>
      21  #include <stdlib.h>
      22  
      23  #include "gmp-impl.h"
      24  #include "tests.h"
      25  
      26  #ifndef COUNT
      27  #define COUNT 150000
      28  #endif
      29  
      30  static void
      31  one_test (mpz_srcptr a, mpz_srcptr b, mpz_srcptr ref)
      32  {
      33    mp_double_limb_t r = mpn_gcd_22 (mpz_getlimbn (a, 1), mpz_getlimbn (a, 0),
      34  				   mpz_getlimbn (b, 1), mpz_getlimbn (b, 0));
      35    if (r.d0 != mpz_getlimbn (ref, 0) || r.d1 != mpz_getlimbn (ref, 1))
      36      {
      37        gmp_fprintf (stderr,
      38  		   "gcd_22 (0x%Zx, 0x%Zx) failed, got: g1 = 0x%Mx g0 = %Mx, ref: 0x%Zx\n",
      39                     a, b, r.d1, r.d0, ref);
      40        abort();
      41      }
      42  }
      43  
      44  int
      45  main (int argc, char **argv)
      46  {
      47    mpz_t a, b, ref;
      48    int count = COUNT;
      49    int test;
      50    gmp_randstate_ptr rands;
      51  
      52    TESTS_REPS (count, argv, argc);
      53  
      54    tests_start ();
      55    rands = RANDS;
      56  
      57    mpz_init (a);
      58    mpz_init (b);
      59    mpz_init (ref);
      60    for (test = 0; test < count; test++)
      61      {
      62        mp_bitcnt_t asize = 1 + gmp_urandomm_ui(rands, 2*GMP_NUMB_BITS);
      63        mp_bitcnt_t bsize = 1 + gmp_urandomm_ui(rands, 2*GMP_NUMB_BITS);
      64        if (test & 1)
      65  	{
      66  	  mpz_urandomb (a, rands, asize);
      67  	  mpz_urandomb (b, rands, bsize);
      68  	}
      69        else
      70  	{
      71  	  mpz_rrandomb (a, rands, asize);
      72  	  mpz_rrandomb (b, rands, bsize);
      73  	}
      74  
      75        mpz_setbit (a, 0);
      76        mpz_setbit (b, 0);
      77        refmpz_gcd (ref, a, b);
      78        one_test (a, b, ref);
      79      }
      80  
      81    mpz_clear (a);
      82    mpz_clear (b);
      83    mpz_clear (ref);
      84  
      85    tests_end ();
      86    return 0;
      87  }