text: /* Test mpf_mul, mpf_div, mpf_ui_div, and mpf_div_ui.
  
  Copyright (C) 1996 Free Software Foundation, Inc.
  
  This file is part of the GNU MP Library.
  
  The GNU MP Library is free software; you can redistribute it and/or modify
  it under the terms of the GNU Library General Public License as published by
  the Free Software Foundation; either version 2 of the License, or (at your
  option) any later version.
  
  The GNU MP 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 Library General Public
  License for more details.
  
  You should have received a copy of the GNU Library General Public License
  along with the GNU MP Library; see the file COPYING.LIB.  If not, write to
  the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
  MA 02111-1307, USA. */
  
  #include <stdio.h>
  #include "gmp.h"
  #include "gmp-impl.h"
  #include "urandom.h"
  
  #ifndef SIZE
  #define SIZE 16
  #endif
  
  main (argc, argv)
       int argc;
       char **argv;
  {
    mp_size_t size;
    mp_exp_t exp;
    int reps = 100000;
    int i;
    mpf_t u, v, w, x;
    mp_size_t bprec = 100;
    mpf_t rerr, limit_rerr;
    mp_limb_t ulimb, vlimb;
    int single_flag;
  
    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 + 100);
        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);
  
        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 ();
  	    }
  	}
      }
  
    exit (0);
  }
  
  oo (x)
       mpf_t x;
  {
    mp_size_t i;
    printf (" exp = %ld\n", x->_mp_exp);
    printf ("size = %d\n", x->_mp_size);
    for (i = ABS (x->_mp_size) - 1; i >= 0; i--)
      printf ("%08lX ", x->_mp_d[i]);
    printf ("\n");
    mpf_dump (x);
  }
  