/* Test mpf_mul, mpf_div, mpf_ui_div, and mpf_div_ui.

Copyright 1996, 2000, 2001, 2003 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 https://www.gnu.org/licenses/.  */

#include <stdio.h>

#include <stdlib.h>

#include "gmp.h"

#include "gmp-impl.h"

#include "tests.h"

#ifndef SIZE

#define SIZE 16

#endif

int

main (int argc, char **argv)

{

  mp_size_t size;

  mp_exp_t exp;

  int reps = 10000;

  int i;

  mpf_t u, v, w, x;

  mp_size_t bprec = SIZE * GMP_LIMB_BITS;

  mpf_t rerr, limit_rerr;

  unsigned long ulimb, vlimb;

  int single_flag;

  tests_start ();

  if (argc > 1)

    {

      reps = strtol (argv[1], 0, 0);

      if (argc > 2)

	bprec = strtol (argv[2], 0, 0);

    }

  mpf_set_default_prec (bprec);

  mpf_init (rerr);

  mpf_init (limit_rerr);

  mpf_init (u);

  mpf_init (v);

  mpf_init (w);

  mpf_init (x);

  for (i = 0; i < reps; i++)

    {

      mp_size_t res_prec;

      res_prec = urandom () % bprec + 1;

      mpf_set_prec (w, res_prec);

      mpf_set_prec (x, res_prec);

      mpf_set_ui (limit_rerr, 1);

      mpf_div_2exp (limit_rerr, limit_rerr, res_prec - 1);

      single_flag = 0;

      if ((urandom () & 1) != 0)

	{

	  size = urandom () % (2 * SIZE) - SIZE;

	  exp = urandom () % SIZE;

	  mpf_random2 (u, size, exp);

	}

      else

	{

	  ulimb = urandom ();

	  mpf_set_ui (u, ulimb);

	  single_flag = 1;

	}

      if ((urandom () & 1) != 0)

	{

	  size = urandom () % (2 * SIZE) - SIZE;

	  exp = urandom () % SIZE;

	  mpf_random2 (v, size, exp);

	}

      else

	{

	  vlimb = urandom ();

	  mpf_set_ui (v, vlimb);

	  single_flag = 2;

	}

      if (mpf_sgn (v) == 0)

	continue;

      mpf_div (w, u, v);

      mpf_mul (x, w, v);

      mpf_reldiff (rerr, u, x);

      if (mpf_cmp (rerr, limit_rerr) > 0)

	{

	  printf ("ERROR in mpf_mul or mpf_div after %d tests\n", i);

	  printf ("   u = "); mpf_dump (u);

	  printf ("   v = "); mpf_dump (v);

	  printf ("   x = "); mpf_dump (x);

	  printf ("   w = "); mpf_dump (w);

	  abort ();

	}

      if (single_flag == 2)

	{

	  mpf_div_ui (x, u, vlimb);

	  mpf_reldiff (rerr, w, x);

	  if (mpf_cmp (rerr, limit_rerr) > 0)

	    {

	      printf ("ERROR in mpf_div or mpf_div_ui after %d tests\n", i);

	      printf ("   u = "); mpf_dump (u);

	      printf ("   v = "); mpf_dump (v);

	      printf ("   x = "); mpf_dump (x);

	      printf ("   w = "); mpf_dump (w);

	      abort ();

	    }

	}

      if (single_flag == 1)

	{

	  mpf_ui_div (x, ulimb, v);

	  mpf_reldiff (rerr, w, x);

	  if (mpf_cmp (rerr, limit_rerr) > 0)

	    {

	      printf ("ERROR in mpf_div or mpf_ui_div after %d tests\n", i);

	      printf ("   u = "); mpf_dump (u);

	      printf ("   v = "); mpf_dump (v);

	      printf ("   x = "); mpf_dump (x);

	      printf ("   w = "); mpf_dump (w);

	      abort ();

	    }

	}

    }

  mpf_clear (rerr);

  mpf_clear (limit_rerr);

  mpf_clear (u);

  mpf_clear (v);

  mpf_clear (w);

  mpf_clear (x);

  tests_end ();

  exit (0);

}