mpir/tests/mpn/t-mullowhigh.c

/* Test mpn_mullow_n mpn_mulhigh_n

Copyright 2009 Jason Moxham

This file is part of the MPIR Library.

The MPIR Library is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published
by the Free Software Foundation; either version 2.1 of the License, or (at
your option) any later version.

The MPIR Library is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
License for more details.

You should have received a copy of the GNU Lesser General Public License
along with the MPIR Library; see the file COPYING.LIB.  If not, write
to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301, USA.
*/

#include <stdio.h>
#include <stdlib.h>
#include "mpir.h"
#include "gmp-impl.h"
#include "tests.h"

#define DISP(xp,xn)  do{int __t;printf("%s=",#xp);for(__t=(xn)-1;__t>=0;__t--)printf("%lX ",(xp)[__t]);printf("\n");}while(0)

int
main (void)
{
  unsigned long bp, xn, n, b, zn, c;
  mp_limb_t xp[1000], yp[1000], mp[1000], lp[1000], hp[1000];
  gmp_randstate_t rands;
  int qpn, j, k, i, l, i1, k1, j1, i2, k2, j2;
  tests_start ();
  gmp_randinit_default(rands);

  for (n = 1; n < 100; n++)
    {
      for (c = 0; c < 10; c++)
	{
	  mpn_randomb (xp, rands, n);
	  mpn_randomb (yp, rands, n);
	  mpn_mul_n (mp, xp, yp, n);
	  mpn_mullow_n (lp, xp, yp, n);
	  mpn_mulhigh_n (hp, xp, yp, n);
	  if (mpn_cmp (mp, lp, n) != 0)
	    {
	      printf ("mpn_mullow_n error %ld\n", n);
	      abort ();
	    }
	  if (mpn_cmp (mp + n, hp + n, n) != 0)
	    {
	      printf ("mpn_mulhigh_n error %ld\n", n);
	      abort ();
	    }
	}
    }

  gmp_randclear(rands);
  tests_end ();
  exit (0);
}