/*
Copyright 1996, 1997, 1998, 2000, 2001, 2007, 2009 Free Software Foundation,
Inc.

This file is part of the GNU MP Library test suite.

The GNU MP Library test suite is free software; you can redistribute it
and/or modify it under the terms of the GNU General Public License as
published by the Free Software Foundation; either version 3 of the License,
or (at your option) any later version.

The GNU MP Library test suite 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 General
Public License for more details.

You should have received a copy of the GNU General Public License along with
the GNU MP Library test suite.  If not, see http://www.gnu.org/licenses/.  */

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

#if defined (USG) || defined (__SVR4) || defined (_UNICOS) || defined (__hpux)
#include <time.h>

int
cputime ()
{
  if (CLOCKS_PER_SEC < 100000)
    return clock () * 1000 / CLOCKS_PER_SEC;
  return clock () / (CLOCKS_PER_SEC / 1000);
}
#else
#include <sys/types.h>
#include <sys/time.h>
#include <sys/resource.h>

int
cputime ()
{
  struct rusage rus;

  getrusage (0, &rus);
  return rus.ru_utime.tv_sec * 1000 + rus.ru_utime.tv_usec / 1000;
}
#endif

#define M * 1000000

#ifndef CLOCK
#error "Don't know CLOCK of your machine"
#endif

#ifndef OPS
#define OPS 20000000
#endif
#ifndef SIZE
#define SIZE 100
#endif
#ifndef TIMES
#define TIMES OPS/(SIZE+1)
#endif

int
main ()
{
  mp_limb_t nptr[2 * SIZE];
  mp_limb_t dptr[2 * SIZE];
  mp_limb_t qptr[2 * SIZE];
  mp_limb_t pptr[2 * SIZE + 1];
  mp_limb_t rptr[2 * SIZE];
  mp_size_t nsize, dsize, qsize, rsize, psize;
  int test;
  mp_limb_t qlimb;

  for (test = 0; ; test++)
    {
      printf ("%d\n", test);
#ifdef RANDOM
      nsize = random () % (2 * SIZE) + 1;
      dsize = random () % nsize + 1;
#else
      nsize = 2 * SIZE;
      dsize = SIZE;
#endif

      mpn_random2 (nptr, nsize);
      mpn_random2 (dptr, dsize);
      dptr[dsize - 1] |= (mp_limb_t) 1 << (GMP_LIMB_BITS - 1);

      MPN_COPY (rptr, nptr, nsize);
      qlimb = mpn_divrem (qptr, (mp_size_t) 0, rptr, nsize, dptr, dsize);
      rsize = dsize;
      qsize = nsize - dsize;
      qptr[qsize] = qlimb;
      qsize += qlimb;
      if (qsize == 0 || qsize > 2 * SIZE)
	{
	  continue;		/* bogus */
	}
      else
	{
	  mp_limb_t cy;
	  if (qsize > dsize)
	    mpn_mul (pptr, qptr, qsize, dptr, dsize);
	  else
	    mpn_mul (pptr, dptr, dsize, qptr, qsize);
	  psize = qsize + dsize;
	  psize -= pptr[psize - 1] == 0;
	  cy = mpn_add (pptr, pptr, psize, rptr, rsize);
	  pptr[psize] = cy;
	  psize += cy;
	}

      if (nsize != psize || mpn_cmp (nptr, pptr, nsize) != 0)
	abort ();
    }
}
