1  /* Test for mullo function.
       2  
       3  Copyright 2009 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  
      21  #include <stdlib.h>
      22  #include <stdio.h>
      23  
      24  #include "gmp-impl.h"
      25  #include "tests.h"
      26  
      27  /* Sizes are up to 2^SIZE_LOG limbs */
      28  #ifndef SIZE_LOG
      29  #define SIZE_LOG 10
      30  #endif
      31  
      32  #ifndef COUNT
      33  #define COUNT 10000
      34  #endif
      35  
      36  #define MAX_N (1L << SIZE_LOG)
      37  #define MIN_N (1)
      38  
      39  int
      40  main (int argc, char **argv)
      41  {
      42    mp_ptr ap, bp, refp, pp, scratch;
      43    int count = COUNT;
      44    int test;
      45    gmp_randstate_ptr rands;
      46    TMP_DECL;
      47    TMP_MARK;
      48  
      49    TESTS_REPS (count, argv, argc);
      50  
      51    tests_start ();
      52    rands = RANDS;
      53  
      54  #define mpn_mullo_itch(n) (0)
      55  
      56    ap = TMP_ALLOC_LIMBS (MAX_N);
      57    bp = TMP_ALLOC_LIMBS (MAX_N);
      58    refp = TMP_ALLOC_LIMBS (MAX_N * 2);
      59    pp = 1+TMP_ALLOC_LIMBS (MAX_N + 2);
      60    scratch
      61      = 1+TMP_ALLOC_LIMBS (mpn_mullo_itch (MAX_N) + 2);
      62  
      63    for (test = 0; test < count; test++)
      64      {
      65        unsigned size_min;
      66        unsigned size_range;
      67        mp_size_t n;
      68        mp_size_t itch;
      69        mp_limb_t p_before, p_after, s_before, s_after;
      70  
      71        for (size_min = 1; (1L << size_min) < MIN_N; size_min++)
      72  	;
      73  
      74        /* We generate an in the MIN_N <= n <= (1 << size_range). */
      75        size_range = size_min
      76  	+ gmp_urandomm_ui (rands, SIZE_LOG + 1 - size_min);
      77  
      78        n = MIN_N
      79  	+ gmp_urandomm_ui (rands, (1L << size_range) + 1 - MIN_N);
      80  
      81        mpn_random2 (ap, n);
      82        mpn_random2 (bp, n);
      83        mpn_random2 (pp-1, n + 2);
      84        p_before = pp[-1];
      85        p_after = pp[n];
      86  
      87        itch = mpn_mullo_itch (n);
      88        ASSERT_ALWAYS (itch <= mpn_mullo_itch (MAX_N));
      89        mpn_random2 (scratch-1, itch+2);
      90        s_before = scratch[-1];
      91        s_after = scratch[itch];
      92  
      93        mpn_mullo_n (pp, ap, bp, n);
      94        mpn_mul_n (refp, ap, bp, n);
      95        if (pp[-1] != p_before || pp[n] != p_after
      96  	  || scratch[-1] != s_before || scratch[itch] != s_after
      97  	  || mpn_cmp (refp, pp, n) != 0)
      98  	{
      99  	  printf ("ERROR in test %d, n = %d",
     100  		  test, (int) n);
     101  	  if (pp[-1] != p_before)
     102  	    {
     103  	      printf ("before pp:"); mpn_dump (pp -1, 1);
     104  	      printf ("keep:   "); mpn_dump (&p_before, 1);
     105  	    }
     106  	  if (pp[n] != p_after)
     107  	    {
     108  	      printf ("after pp:"); mpn_dump (pp + n, 1);
     109  	      printf ("keep:   "); mpn_dump (&p_after, 1);
     110  	    }
     111  	  if (scratch[-1] != s_before)
     112  	    {
     113  	      printf ("before scratch:"); mpn_dump (scratch-1, 1);
     114  	      printf ("keep:   "); mpn_dump (&s_before, 1);
     115  	    }
     116  	  if (scratch[itch] != s_after)
     117  	    {
     118  	      printf ("after scratch:"); mpn_dump (scratch + itch, 1);
     119  	      printf ("keep:   "); mpn_dump (&s_after, 1);
     120  	    }
     121  	  mpn_dump (ap, n);
     122  	  mpn_dump (bp, n);
     123  	  mpn_dump (pp, n);
     124  	  mpn_dump (refp, n);
     125  
     126  	  abort();
     127  	}
     128      }
     129    TMP_FREE;
     130    tests_end ();
     131    return 0;
     132  }